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+For ease of distribution, lessphp 0.4.0 is under a dual license.
+You are free to pick which one suits your needs.
+
+
+
+
+MIT LICENSE
+
+
+
+
+Copyright (c) 2013 Leaf Corcoran, http://leafo.net/lessphp
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+
+
+GPL VERSION 3
+
+
+
+
+					GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
diff --git a/vendor/leafo/lessphp/Makefile b/vendor/leafo/lessphp/Makefile
new file mode 100644
index 00000000..a5d262cd
--- /dev/null
+++ b/vendor/leafo/lessphp/Makefile
@@ -0,0 +1,7 @@
+
+test:
+	phpunit --colors tests
+
+release:
+	./package.sh
+
diff --git a/vendor/leafo/lessphp/README.md b/vendor/leafo/lessphp/README.md
new file mode 100644
index 00000000..1379ddce
--- /dev/null
+++ b/vendor/leafo/lessphp/README.md
@@ -0,0 +1,96 @@
+[![Build Status](https://travis-ci.org/leafo/lessphp.svg?branch=master)](https://travis-ci.org/leafo/lessphp)
+
+# lessphp v0.5.0
+### <http://leafo.net/lessphp>
+
+`lessphp` is a compiler for LESS written in PHP. The documentation is great,
+so check it out: <http://leafo.net/lessphp/docs/>.
+
+Here's a quick tutorial:
+
+### How to use in your PHP project
+
+The only file required is `lessc.inc.php`, so copy that to your include directory.
+
+The typical flow of **lessphp** is to create a new instance of `lessc`,
+configure it how you like, then tell it to compile something using one built in
+compile methods.
+
+The `compile` method compiles a string of LESS code to CSS.
+
+```php
+<?php
+require "lessc.inc.php";
+
+$less = new lessc;
+echo $less->compile(".block { padding: 3 + 4px }");
+```
+
+The `compileFile` method reads and compiles a file. It will either return the
+result or write it to the path specified by an optional second argument.
+
+```php
+<?php
+echo $less->compileFile("input.less");
+```
+
+The `compileChecked` method is like `compileFile`, but it only compiles if the output
+file doesn't exist or it's older than the input file:
+
+```php
+<?php
+$less->checkedCompile("input.less", "output.css");
+```
+
+If there any problem compiling your code, an exception is thrown with a helpful message:
+
+```php
+<?php
+try {
+  $less->compile("invalid LESS } {");
+} catch (exception $e) {
+  echo "fatal error: " . $e->getMessage();
+}
+```
+
+The `lessc` object can be configured through an assortment of instance methods.
+Some possible configuration options include [changing the output format][1],
+[setting variables from PHP][2], and [controlling the preservation of
+comments][3], writing [custom functions][4] and much more. It's all described
+in [the documentation][0].
+
+
+ [0]: http://leafo.net/lessphp/docs/
+ [1]: http://leafo.net/lessphp/docs/#output_formatting
+ [2]: http://leafo.net/lessphp/docs/#setting_variables_from_php
+ [3]: http://leafo.net/lessphp/docs/#preserving_comments
+ [4]: http://leafo.net/lessphp/docs/#custom_functions
+
+
+### How to use from the command line
+
+An additional script has been included to use the compiler from the command
+line. In the simplest invocation, you specify an input file and the compiled
+css is written to standard out:
+
+    $ plessc input.less > output.css
+
+Using the -r flag, you can specify LESS code directly as an argument or, if
+the argument is left off, from standard in:
+
+    $ plessc -r "my less code here"
+
+Finally, by using the -w flag you can watch a specified input file and have it
+compile as needed to the output file:
+
+    $ plessc -w input-file output-file
+
+Errors from watch mode are written to standard out.
+
+The -f flag sets the [output formatter][1]. For example, to compress the
+output run this:
+
+    $ plessc -f=compressed myfile.less
+
+For more help, run `plessc --help`
+
diff --git a/vendor/leafo/lessphp/composer.json b/vendor/leafo/lessphp/composer.json
new file mode 100644
index 00000000..0f06ba09
--- /dev/null
+++ b/vendor/leafo/lessphp/composer.json
@@ -0,0 +1,25 @@
+{
+    "name": "leafo/lessphp",
+    "type": "library",
+    "description": "lessphp is a compiler for LESS written in PHP.",
+    "homepage": "http://leafo.net/lessphp/",
+    "license": [
+      "MIT",
+      "GPL-3.0"
+    ],
+    "authors": [
+        {
+            "name": "Leaf Corcoran",
+            "email": "leafot@gmail.com",
+            "homepage": "http://leafo.net"
+        }
+    ],
+    "autoload": {
+        "classmap": ["lessc.inc.php"]
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "0.4.x-dev"
+        }
+    }
+}
diff --git a/vendor/leafo/lessphp/docs/docs.md b/vendor/leafo/lessphp/docs/docs.md
new file mode 100644
index 00000000..112dc2ee
--- /dev/null
+++ b/vendor/leafo/lessphp/docs/docs.md
@@ -0,0 +1,1400 @@
+    title: v0.5.0 documentation
+    link_to_home: true
+--
+
+<h2 skip="true">Documentation v0.5.0</h2>
+
+<div style="margin-bottom: 1em;">$index</div>
+
+**lessphp** is a compiler that generates CSS from a superset language which
+adds a collection of convenient features often seen in other languages. All CSS
+is compatible with LESS, so you can start using new features with your existing CSS.
+
+It is designed to be compatible with [less.js](http://lesscss.org), and suitable
+as a drop in replacement for PHP projects.
+
+## Getting Started
+
+The homepage for **lessphp** can be found at [http://leafo.net/lessphp/][1].
+
+You can follow development at the project's [GitHub][2].
+
+Including **lessphp** in your project is as simple as dropping the single
+include file into your code base and running the appropriate compile method as
+described in the [PHP Interface](#php_interface).
+
+  [1]: http://leafo.net/lessphp "lessphp homepage"
+  [2]: https://github.com/leafo/lessphp "lessphp GitHub page"
+
+## Installation
+
+**lessphp** is distributed entirely in a single stand-alone file. Download the
+latest version from either [the homepage][1] or [GitHub][2].
+
+Development versions can also be downloading from GitHub.
+
+Place `lessphp.inc.php` in a location available to your PHP scripts, and
+include it. That's it! you're ready to begin.
+
+## The Language
+
+**lessphp** is very easy to learn because it generally functions how you would
+expect it to. If you feel something is challenging or missing, feel free to
+open an issue on the [bug tracker](https://github.com/leafo/lessphp/issues).
+
+It is also easy to learn because any standards-compliant CSS code is valid LESS
+code. You are free to gradually enhance your existing CSS code base with LESS
+features without having to worry about rewriting anything.
+
+The following is a description of the new languages features provided by LESS.
+
+### Line Comments
+
+Simple but very useful; line comments are started with `//`:
+
+    ```less
+    // this is a comment
+    body {
+      color: red; // as is this
+      /* block comments still work also */
+    }
+    ```
+
+### Variables
+
+Variables are identified with a name that starts with `@`. To declare a
+variable, you create an appropriately named CSS property and assign it a value:
+
+    ```less
+    @family: "verdana";
+    @color: red;
+    body {
+      @mycolor: red;
+      font-family: @family;
+      color: @color;
+      border-bottom: 1px solid @color;
+    }
+    ```
+
+Variable declarations will not appear in the output. Variables can be declared
+in the outer most scope of the file, or anywhere else a CSS property may
+appear. They can hold any CSS property value.
+
+Variables are only visible for use from their current scope, or any enclosed
+scopes.
+
+If you have a string or keyword in a variable, you can reference another
+variable by that name by repeating the `@`:
+
+    ```less
+    @value: 20px;
+    @value_name: "value";
+
+    width: @@value_name;
+    ```
+
+### Expressions
+
+Expressions let you combine values and variables in meaningful ways. For
+example you can add to a color to make it a different shade. Or divide up the
+width of your layout logically. You can even concatenate strings.
+
+Use the mathematical operators to evaluate an expression:
+
+    ```less
+    @width: 960px;
+    .nav {
+      width: @width / 3;
+      color: #001 + #abc;
+    }
+    .body {
+      width: 2 * @width / 3;
+      font-family: "hel" + "vetica";
+    }
+    ```
+
+Parentheses can be used to control the order of evaluation. They can also be
+used to force an evaluation for cases where CSS's syntax makes the expression
+ambiguous.
+
+The following property will produce two numbers, instead of doing the
+subtraction:
+
+    ```less
+    margin: 10px -5px;
+    ```
+
+To force the subtraction:
+
+    ```less
+    margin: (10px -5px);
+    ```
+
+It is also safe to surround mathematical operators by spaces to ensure that
+they are evaluated:
+
+    ```less
+    margin: 10px - 5px;
+    ```
+
+Division has a special quirk. There are certain CSS properties that use the `/`
+operator as part of their value's syntax. Namely, the [font][4] shorthand and
+[border-radius][3].
+
+  [3]: https://developer.mozilla.org/en/CSS/border-radius
+  [4]: https://developer.mozilla.org/en/CSS/font
+
+
+Thus, **lessphp** will ignore any division in these properties unless it is
+wrapped in parentheses. For example, no division will take place here:
+
+    ```less
+    .font {
+      font: 20px/80px "Times New Roman";
+    }
+    ```
+
+In order to force division we must wrap the expression in parentheses:
+
+    ```less
+    .font {
+      font: (20px/80px) "Times New Roman";
+    }
+    ```
+
+If you want to write a literal `/` expression without dividing in another
+property (or a variable), you can use [string unquoting](#string_unquoting):
+
+    ```less
+    .var {
+      @size: ~"20px/80px";
+      font: @size sans-serif;
+    }
+    ```
+
+### Nested Blocks
+
+By nesting blocks we can build up a chain of CSS selectors through scope
+instead of repeating them. In addition to reducing repetition, this also helps
+logically organize the structure of our CSS.
+
+    ```less
+    ol.list {
+      li.special {
+        border: 1px solid red;
+      }
+
+      li.plain {
+        font-weight: bold;
+      }
+    }
+    ```
+
+
+This will produce two blocks, a `ol.list li.special` and `ol.list li.plain`.
+
+Blocks can be nested as deep as required in order to build a hierarchy of
+relationships.
+
+The `&` operator can be used in a selector to represent its parent's selector.
+If the `&` operator is used, then the default action of appending the parent to
+the front of the child selector separated by space is not performed.
+
+    ```less
+    b {
+      a & {
+        color: red;
+      }
+
+      // the following have the same effect
+
+      & i {
+        color: blue;
+      }
+
+      i {
+        color: blue;
+      }
+    }
+    ```
+
+
+Because the `&` operator respects the whitespace around it, we can use it to
+control how the child blocks are joined. Consider the differences between the
+following:
+
+    ```less
+    div {
+      .child-class { color: purple; }
+
+      &.isa-class { color: green; }
+
+      #child-id { height: 200px; }
+
+      &#div-id { height: 400px; }
+
+      &:hover { color: red; }
+
+      :link { color: blue; }
+    }
+    ```
+
+The `&` operator also works with [mixins](#mixins), which produces interesting results:
+
+    ```less
+    .within_box_style() {
+      .box & {
+        color: blue;
+      }
+    }
+
+    #menu {
+      .within_box_style;
+    }
+    ```
+
+### Mixins
+
+Any block can be mixed in just by naming it:
+
+    ```less
+    .mymixin {
+      color: blue;
+      border: 1px solid red;
+
+      .special {
+        font-weight: bold;
+      }
+    }
+
+
+    h1 {
+      font-size: 200px;
+      .mymixin;
+    }
+    ```
+
+All properties and child blocks are mixed in.
+
+Mixins can be made parametric, meaning they can take arguments, in order to
+enhance their utility. A parametric mixin all by itself is not outputted when
+compiled. Its properties will only appear when mixed into another block.
+
+The canonical example is to create a rounded corners mixin that works across
+browsers:
+
+    ```less
+    .rounded-corners(@radius: 5px) {
+      border-radius: @radius;
+      -webkit-border-radius: @radius;
+      -moz-border-radius: @radius;
+    }
+
+    .header {
+      .rounded-corners();
+    }
+
+    .info {
+      background: red;
+      .rounded-corners(14px);
+    }
+    ```
+
+If you have a mixin that doesn't have any arguments, but you don't want it to
+show up in the output, give it a blank argument list:
+
+    ```less
+    .secret() {
+      font-size: 6000px;
+    }
+
+    .div {
+      .secret;
+    }
+    ```
+
+If the mixin doesn't need any arguments, you can leave off the parentheses when
+mixing it in, as seen above.
+
+You can also mixin a block that is nested inside other blocks. You can think of
+the outer block as a way of making a scope for your mixins. You just list the
+names of the mixins separated by spaces, which describes the path to the mixin
+you want to include. Optionally you can separate them by `>`.
+
+    ```less
+    .my_scope  {
+      .some_color {
+        color: red;
+        .inner_block {
+          text-decoration: underline;
+        }
+      }
+      .bold {
+        font-weight: bold;
+        color: blue;
+      }
+    }
+
+    .a_block {
+      .my_scope .some_color;
+      .my_scope .some_color .inner_block;
+    }
+
+    .another_block {
+      // the alternative syntax
+      .my_scope > .bold;
+    }
+    ```
+
+
+#### Mixin Arguments
+
+When declaring a mixin you can specify default values for each argument.  Any
+argument left out will be given the default value specified. Here's the
+syntax:
+
+```less
+.mix(@color: red, @height: 20px, @pad: 12px) {
+  border: 1px solid @color;
+  height: @height - @pad;
+  padding: @pad;
+}
+
+.default1 {
+  .mix();
+}
+
+.default2 {
+  .mix(blue);
+}
+
+.default3 {
+  .mix(blue, 40px, 5px);
+}
+```
+
+Additionally, you can also call a mixin using the argument names, this is
+useful if you want to replace a specific argument while having all the others
+take the default regardless of what position the argument appears in. The
+syntax looks something like this:
+
+
+```lessbasic
+div {
+  .my_mixin(@paddding: 4px); // @color and @height get default values
+  .my_mixin(@paddding: 4px, @height: 50px); // you can specify them in any order
+}
+```
+
+You can also combine the ordered arguments with the named ones:
+
+```lessbasic
+div {
+  // @color is blue, @padding is 4px, @height is default
+  .my_mixin(blue, @padding: 4px);
+}
+```
+
+Mixin arguments can be delimited with either a `,` or `;`, but only one can be
+active at once. This means that each argument is separated by either `,` or
+`;`. By default `,` is the delimiter, in all the above examples we used a `,`.
+
+A problem arises though, sometimes CSS value lists are made up with commas. In
+order to be able to pass a comma separated list literal we need to use `;` as
+the delimiter. (You don't need to worry about this if your list is stored in a
+variable)
+
+If a `;` appears anywhere in the argument list, then it will be used as the
+argument delimiter, and all commas we be used as part of the argument values.
+
+Here's a basic example:
+
+```less
+.fancy_mixin(@box_shadow, @color: blue) {
+  border: 1px solid @color;
+  box-shadow: @box_shadow;
+}
+
+
+div {
+  // two arguments passed separated by ;
+  .fancy_mixin(2px 2px, -2px -2px; red);
+}
+
+pre {
+  // one argument passed, ends in ;
+  .fancy_mixin(inset 4px 4px, -2px 2px;);
+}
+
+```
+
+If we only want to pass a single comma separated value we still need to use
+`;`, to do this we stick it on the end as demonstrated above.
+
+
+#### `@arguments` Variable
+
+Within an mixin there is a special variable named `@arguments` that contains
+all the arguments passed to the mixin along with any remaining arguments that
+have default values. The value of the variable has all the values separated by
+spaces.
+
+This useful for quickly assigning all the arguments:
+
+    ```less
+    .box-shadow(@x, @y, @blur, @color) {
+      box-shadow: @arguments;
+      -webkit-box-shadow: @arguments;
+      -moz-box-shadow: @arguments;
+    }
+    .menu {
+      .box-shadow(1px, 1px, 5px, #aaa);
+    }
+    ```
+
+In addition to the arguments passed to the mixin, `@arguments` will also include
+remaining default values assigned by the mixin:
+
+
+    ```less
+    .border-mixin(@width, @style: solid, @color: black) {
+      border: @arguments;
+    }
+
+    pre {
+      .border-mixin(4px, dotted);
+    }
+
+    ```
+
+
+#### Pattern Matching
+
+When you *mix in* a mixin, all the available mixins of that name in the current
+scope are checked to see if they match based on what was passed to the mixin
+and how it was declared.
+
+The simplest case is matching by number of arguments. Only the mixins that
+match the number of arguments passed in are used.
+
+    ```less
+    .simple() { // matches no arguments
+      height: 10px;
+    }
+
+    .simple(@a, @b) { // matches two arguments
+      color: red;
+    }
+
+    .simple(@a) { // matches one argument
+      color: blue;
+    }
+
+    div {
+      .simple(10);
+    }
+
+    span {
+      .simple(10, 20);
+    }
+    ```
+
+Whether an argument has default values is also taken into account when matching
+based on number of arguments:
+
+    ```less
+    // matches one or two arguments
+    .hello(@a, @b: blue) {
+      height: @a;
+      color: @b;
+    }
+
+    .hello(@a, @b) { // matches only two
+      width: @a;
+      border-color: @b;
+    }
+
+    .hello(@a) { // matches only one
+      padding: 1em;
+    }
+
+    div {
+      .hello(10px);
+    }
+
+    pre {
+      .hello(10px, yellow);
+    }
+    ```
+
+Additionally, a *vararg* value can be used to further control how things are
+matched.  A mixin's argument list can optionally end in the special argument
+named `...`.  The `...` may match any number of arguments, including 0.
+
+    ```less
+    // this will match any number of arguments
+    .first(...) {
+      color: blue;
+    }
+
+    // matches at least 1 argument
+    .second(@arg, ...) {
+      height: 200px + @arg;
+    }
+
+    div { .first("some", "args"); }
+    pre { .second(10px); }
+    ```
+
+If you want to capture the values that get captured by the *vararg* you can
+give it a variable name by putting it directly before the `...`. This variable
+must be the last argument defined. It's value is just like the special
+[`@arguments` variable](#arguments_variable), a space separated list.
+
+
+    ```less
+    .hello(@first, @rest...) {
+      color: @first;
+      text-shadow: @rest;
+    }
+
+    span {
+      .hello(red, 1px, 1px, 0px, white);
+    }
+
+    ```
+
+Another way of controlling whether a mixin matches is by specifying a value in
+place of an argument name when declaring the mixin:
+
+    ```less
+    .style(old, @size) {
+      font: @size serif;
+    }
+
+    .style(new, @size) {
+      font: @size sans-serif;
+    }
+
+    .style(@_, @size) {
+      letter-spacing: floor(@size / 6px);
+    }
+
+    em {
+      @switch: old;
+      .style(@switch, 15px);
+    }
+    ```
+
+Notice that two of the three mixins were matched. The mixin with a matching
+first argument, and the generic mixin that matches two arguments. It's common
+to use `@_` as the name of a variable we intend to not use. It has no special
+meaning to LESS, just to the reader of the code.
+
+#### Guards
+
+Another way of restricting when a mixin is mixed in is by using guards. A guard
+is a special expression that is associated with a mixin declaration that is
+evaluated during the mixin process. It must evaluate to true before the mixin
+can be used.
+
+We use the `when` keyword to begin describing a list of guard expressions.
+
+Here's a simple example:
+
+    ```less
+    .guarded(@arg) when (@arg = hello) {
+      color: blue;
+    }
+
+    div {
+      .guarded(hello); // match
+    }
+
+    span {
+      .guarded(world); // no match
+    }
+    ```
+Only the `div`'s mixin will match in this case, because the guard expression
+requires that `@arg` is equal to `hello`.
+
+We can include many different guard expressions by separating them by commas.
+Only one of them needs to match to trigger the mixin:
+
+    ```less
+    .x(@a, @b) when (@a = hello), (@b = world) {
+      width: 960px;
+    }
+
+    div {
+      .x(hello, bar); // match
+    }
+
+    span {
+      .x(foo, world); // match
+    }
+
+    pre {
+      .x(foo, bar); // no match
+    }
+    ```
+
+Instead of a comma, we can use `and` keyword to make it so all of the guards
+must match in order to trigger the mixin. `and` has higher precedence than the
+comma.
+
+    ```less
+    .y(@a, @b) when (@a = hello) and (@b = world) {
+      height: 600px;
+    }
+
+    div {
+      .y(hello, world); // match
+    }
+
+    span {
+      .y(hello, bar); // no match
+    }
+    ```
+
+Commas and `and`s can be mixed and matched.
+
+You can also negate a guard expression by using `not` in from of the parentheses:
+
+    ```less
+    .x(@a) when not (@a = hello) {
+      color: blue;
+    }
+
+    div {
+      .x(hello); // no match
+    }
+    ```
+
+The `=` operator is used to check equality between any two values. For numbers
+the following comparison operators are also defined:
+
+`<`, `>`, `=<`, `>=`
+
+There is also a collection of predicate functions that can be used to test the
+type of a value.
+
+These are `isnumber`, `iscolor`, `iskeyword`, `isstring`, `ispixel`,
+`ispercentage` and `isem`.
+
+    ```less
+    .mix(@a) when (ispercentage(@a)) {
+      height: 500px * @a;
+    }
+    .mix(@a) when (ispixel(@a)) {
+      height: @a;
+    }
+
+    div.a {
+      .mix(50%);
+    }
+
+    div.a {
+      .mix(350px);
+    }
+    ```
+
+#### !important
+
+If you want to apply the `!important` suffix to every property when mixing in a
+mixin, just append `!important` to the end of the call to the mixin:
+
+    ```less
+    .make_bright {
+      color: red;
+      font-weight: bold;
+    }
+
+    .color {
+      color: green;
+    }
+
+    body {
+      .make_bright() !important;
+      .color();
+    }
+
+    ```
+
+### Selector Expressions
+
+Sometimes we want to dynamically generate the selector of a block based on some
+variable or expression. We can do this by using *selector expressions*. Selector
+expressions are CSS selectors that are evaluated in the current scope before
+being written out.
+
+A simple example is a mixin that dynamically creates a selector named after the
+mixin's argument:
+
+    ```less
+    .create-selector(@name) {
+      @{name} {
+        color: red;
+      }
+    }
+
+    .create-selector(hello);
+    .create-selector(world);
+    ```
+
+The string interpolation syntax works inside of selectors, letting you insert varaibles.
+
+Here's an interesting example adapted from Twitter Bootstrap. A couple advanced
+things are going on. We are using [Guards](#guards) along with a recursive
+mixin to work like a loop to generate a series of CSS blocks.
+
+
+    ```less
+    // create our recursive mixin:
+    .spanX (@index) when (@index > 0) {
+      .span@{index} {
+        width: @index * 100px;
+      }
+      .spanX(@index - 1);
+    }
+    .spanX (0) {}
+
+    // mix it into the global scopee:
+    .spanX(4);
+    ```
+
+### Import
+
+Multiple LESS files can be compiled into a single CSS file by using the
+`@import` statement. Be careful, the LESS import statement shares syntax with
+the CSS import statement. If the file being imported ends in a `.less`
+extension, or no extension, then it is treated as a LESS import. Otherwise it
+is left alone and outputted directly:
+
+    ```lessbasic
+    // my_file.less
+    .some-mixin(@height) {
+      height: @height;
+    }
+
+    // main.less
+    @import "main.less" // will import the file if it can be found
+    @import "main.css" // will be left alone
+
+    body {
+      .some-mixin(400px);
+    }
+    ```
+
+All of the following lines are valid ways to import the same file:
+
+    ```lessbasic
+    @import "file";
+    @import 'file.less';
+    @import url("file");
+    @import url('file');
+    @import url(file);
+    ```
+
+When importing, the `importDir` is searched for files. This can be configured,
+see [PHP Interface](#php_interface).
+
+A file is only imported once. If you try to include the same file multiple
+times all the import statements after the first produce no output.
+
+### String Interpolation
+
+String interpolation is a convenient way to insert the value of a variable
+right into a string literal. Given some variable named `@var_name`, you just
+need to write it as `@{var_name}` from within the string to have its value
+inserted:
+
+    ```less
+    @symbol: ">";
+    h1:before {
+      content: "@{symbol}: ";
+    }
+
+    h2:before {
+      content: "@{symbol}@{symbol}: ";
+    }
+    ```
+
+There are two kinds of strings, implicit and explicit strings. Explicit strings
+are wrapped by double quotes, `"hello I am a string"`, or single quotes `'I am
+another string'`. Implicit strings only appear when using `url()`. The text
+between the parentheses is considered a string and thus string interpolation is
+possible:
+
+    ```less
+    @path: "files/";
+    body {
+      background: url(@{path}my_background.png);
+    }
+    ```
+
+### String Format Function
+
+The `%` function can be used to insert values into strings using a *format
+string*. It works similar to `printf` seen in other languages. It has the
+same purpose as string interpolation above, but gives explicit control over
+the output format.
+
+    ```less
+    @symbol: ">";
+    h1:before {
+      content: %("%s: ", @symbol);
+    }
+    ```
+
+The `%` function takes as its first argument the format string, following any
+number of addition arguments that are inserted in place of the format
+directives.
+
+A format directive starts with a `%` and is followed by a single character that
+is either `a`, `d`, or `s`:
+
+    ```less
+    strings: %("%a %d %s %a", hi, 1, 'ok', 'cool');
+    ```
+
+`%a` and `%d` format the value the same way: they compile the argument to its
+CSS value and insert it directly. When used with a string, the quotes are
+included in the output. This typically isn't what we want, so we have the `%s`
+format directive which strips quotes from strings before inserting them.
+
+The `%d` directive functions the same as `%a`, but is typically used for numbers
+assuming the output format of numbers might change in the future.
+
+### String Unquoting
+
+Sometimes you will need to write proprietary CSS syntax that is unable to be
+parsed. As a workaround you can place the code into a string and unquote it.
+Unquoting is the process of outputting a string without its surrounding quotes.
+There are two ways to unquote a string.
+
+The `~` operator in front of a string will unquote that string:
+
+    ```less
+    .class {
+      // a made up, but problematic vendor specific CSS
+      filter: ~"Microsoft.AlphaImage(src='image.png')";
+    }
+    ```
+
+If you are working with other types, such as variables, there is a built in
+function that let's you unquote any value. It is called `e`.
+
+    ```less
+    @color: "red";
+    .class {
+      color: e(@color);
+    }
+    ```
+
+### Built In Functions
+
+**lessphp** has a collection of built in functions:
+
+* `e(str)` -- returns a string without the surrounding quotes.
+  See [String Unquoting](#string_unquoting)
+
+* `floor(number)` -- returns the floor of a numerical input
+* `round(number, [precision])` -- returns the rounded value of numerical input with optional precision
+
+* `lighten(color, percent)` -- lightens `color` by `percent` and returns it
+* `darken(color, percent)` -- darkens `color` by `percent` and returns it
+
+* `saturate(color, percent)` -- saturates `color` by `percent` and returns it
+* `desaturate(color, percent)` -- desaturates `color` by `percent` and returns it
+
+* `fadein(color, percent)` -- makes `color` less transparent by `percent` and returns it
+* `fadeout(color, percent)` -- makes `color` more transparent by `percent` and returns it
+
+* `spin(color, amount)` -- returns a color with `amount` degrees added to hue
+
+* `fade(color, amount)` -- returns a color with the alpha set to `amount`
+
+* `hue(color)` -- returns the hue of `color`
+
+* `saturation(color)` -- returns the saturation of `color`
+
+* `lightness(color)` -- returns the lightness of `color`
+
+* `alpha(color)` -- returns the alpha value of `color` or 1.0 if it doesn't have an alpha
+
+* `percentage(number)` -- converts a floating point number to a percentage, e.g. `0.65` -> `65%`
+
+* `mix(color1, color1, percent)` -- mixes two colors by percentage where 100%
+  keeps all of `color1`, and 0% keeps all of `color2`. Will take into account
+  the alpha of the colors if it exists. See
+  <http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method>.
+
+* `contrast(color, dark, light)` -- if `color` has a lightness value greater
+  than 50% then `dark` is returned, otherwise return `light`.
+
+* `extract(list, index)` -- returns the `index`th item from `list`. The list is
+  `1` indexed, meaning the first item's index is 1, the second is 2, and etc.
+
+* `pow(base, exp)` -- returns `base` raised to the power of `exp`
+
+* `pi()` -- returns pi
+
+* `mod(a,b)` -- returns `a` modulus `b`
+
+* `tan(a)` -- returns tangent of `a` where `a` is in radians
+
+* `cos(a)` -- returns cosine of `a` where `a` is in radians
+
+* `sin(a)` -- returns sine of `a` where `a` is in radians
+
+* `atan(a)` -- returns arc tangent of `a`
+
+* `acos(a)` -- returns arc cosine of `a`
+
+* `asin(a)` -- returns arc sine of `a`
+
+* `sqrt(a)` -- returns square root of `a`
+
+* `rgbahex(color)` -- returns a string containing 4 part hex color.
+
+   This is used to convert a CSS color into the hex format that IE's filter
+   method expects when working with an alpha component.
+
+       ```less
+       .class {
+          @start: rgbahex(rgba(25, 34, 23, .5));
+          @end: rgbahex(rgba(85, 74, 103, .6));
+          // abridged example
+          -ms-filter:
+            e("gradient(start=@{start},end=@{end})");
+       }
+       ```
+
+## PHP Interface
+
+When working with **lessphp** from PHP, the typical flow is to create a new
+instance of `lessc`, configure it how you like, then tell it to compile
+something using one built in compile methods.
+
+Methods:
+
+* [`compile($string)`](#compiling[) -- Compile a string
+
+* [`compileFile($inFile, [$outFile])`](#compiling) -- Compile a file to another or return it
+
+* [`checkedCompile($inFile, $outFile)`](#compiling) -- Compile a file only if it's newer
+
+* [`cachedCompile($cacheOrFile, [$force])`](#compiling_automatically) -- Conditionally compile while tracking imports
+
+* [`setFormatter($formatterName)`](#output_formatting) -- Change how CSS output looks
+
+* [`setPreserveComments($keepComments)`](#preserving_comments) -- Change if comments are kept in output
+
+* [`registerFunction($name, $callable)`](#custom_functions) -- Add a custom function
+
+* [`unregisterFunction($name)`](#custom_functions) -- Remove a registered function
+
+* [`setVariables($vars)`](#setting_variables_from_php) -- Set a variable from PHP
+
+* [`unsetVariable($name)`](#setting_variables_from_php) -- Remove a PHP variable
+
+* [`setImportDir($dirs)`](#import_directory) -- Set the search path for imports
+
+* [`addImportDir($dir)`](#import_directory) -- Append directory to search path for imports
+
+
+### Compiling
+
+The `compile` method compiles a string of LESS code to CSS.
+
+    ```php
+    <?php
+    require "lessc.inc.php";
+
+    $less = new lessc;
+    echo $less->compile(".block { padding: 3 + 4px }");
+    ```
+
+The `compileFile` method reads and compiles a file. It will either return the
+result or write it to the path specified by an optional second argument.
+
+    ```php
+    echo $less->compileFile("input.less");
+    ```
+
+The `compileChecked` method is like `compileFile`, but it only compiles if the output
+file doesn't exist or it's older than the input file:
+
+    ```php
+    $less->checkedCompile("input.less", "output.css");
+    ```
+
+See [Compiling Automatically](#compiling_automatically) for a description of
+the more advanced `cachedCompile` method.
+
+### Output Formatting
+
+Output formatting controls the indentation of the output CSS. Besides the
+default formatter, two additional ones are included and it's also easy to make
+your own.
+
+To use a formatter, the method `setFormatter` is used. Just
+pass the name of the formatter:
+
+    ```php
+    $less = new lessc;
+
+    $less->setFormatter("compressed");
+    echo $less->compile("div { color: lighten(blue, 10%) }");
+    ```
+
+In this example, the `compressed` formatter is used. The formatters are:
+
+ * `lessjs` *(default)* -- Same style used in LESS for JavaScript
+
+ * `compressed` -- Compresses all the unrequired whitespace
+
+ * `classic` -- **lessphp**'s original formatter
+
+To revert to the default formatter, call `setFormatter` with a value of `null`.
+
+#### Custom Formatter
+
+The easiest way to customize the formatter is to create your own instance of an
+existing formatter and alter its public properties before passing it off to
+**lessphp**. The `setFormatter` method can also take an instance of a
+formatter.
+
+Each of the formatter names corresponds to a class with `lessc_formatter_`
+prepended in front of it. Here the classic formatter is customized to use tabs
+instead of spaces:
+
+
+    ```php
+    $formatter = new lessc_formatter_classic;
+    $formatter->indentChar = "\t";
+
+    $less = new lessc;
+    $less->setFormatter($formatter);
+    echo $less->compileFile("myfile.less");
+    ```
+
+For more information about what can be configured with the formatter consult
+the source code.
+
+### Preserving Comments
+
+By default, all comments in the source LESS file are stripped when compiling.
+You might want to keep the `/* */` comments in the output though. For
+example, bundling a license in the file.
+
+Enable or disable comment preservation by calling `setPreserveComments`:
+
+    ```php
+    $less = new lessc;
+    $less->setPreserveComments(true);
+    echo $less->compile("/* hello! */");
+    ```
+
+Comments are disabled by default because there is additional overhead, and more
+often than not they aren't needed.
+
+
+### Compiling Automatically
+
+Often, you want to only compile a LESS file only if it has been modified since
+last compile. This is very important because compiling is performance intensive
+and you should avoid a recompile if it possible.
+
+The `checkedCompile` compile method will do just that. It will check if the
+input file is newer than the output file, or if the output file doesn't exist
+yet, and compile only then.
+
+    ```php
+    $less->checkedCompile("input.less", "output.css");
+    ```
+
+There's a problem though. `checkedCompile` is very basic, it only checks the
+input file's modification time. It is unaware of any files from `@import`.
+
+
+For this reason we also have `cachedCompile`. It's slightly more complex, but
+gives us the ability to check changes to all files including those imported. It
+takes one argument, either the name of the file we want to compile, or an
+existing *cache object*. Its return value is an updated cache object.
+
+If we don't have a cache object, then we call the function with the name of the
+file to get the initial cache object. If we do have a cache object, then we
+call the function with it. In both cases, an updated cache object is returned.
+
+The cache object keeps track of all the files that must be checked in order to
+determine if a rebuild is required.
+
+The cache object is a plain PHP `array`. It stores the last time it compiled in
+`$cache["updated"]` and output of the compile in `$cache["compiled"]`.
+
+Here we demonstrate creating an new cache object, then using it to see if we
+have a recompiled version available to be written:
+
+
+    ```php
+    $inputFile = "myfile.less";
+    $outputFile = "myfile.css";
+
+    $less = new lessc;
+
+    // create a new cache object, and compile
+    $cache = $less->cachedCompile($inputFile);
+
+    file_put_contents($outputFile, $cache["compiled"]);
+
+    // the next time we run, write only if it has updated
+    $last_updated = $cache["updated"];
+    $cache = $less->cachedCompile($cache);
+    if ($cache["updated"] > $last_updated) {
+        file_put_contents($outputFile, $cache["compiled"]);
+    }
+
+    ```
+
+In order for the system to fully work, we must save cache object between
+requests. Because it's a plain PHP `array`, it's sufficient to
+[`serialize`](http://php.net/serialize) it and save it the string somewhere
+like a file or in persistent memory.
+
+An example with saving cache object to a file:
+
+    ```php
+    function autoCompileLess($inputFile, $outputFile) {
+      // load the cache
+      $cacheFile = $inputFile.".cache";
+
+      if (file_exists($cacheFile)) {
+        $cache = unserialize(file_get_contents($cacheFile));
+      } else {
+        $cache = $inputFile;
+      }
+
+      $less = new lessc;
+      $newCache = $less->cachedCompile($cache);
+
+      if (!is_array($cache) || $newCache["updated"] > $cache["updated"]) {
+        file_put_contents($cacheFile, serialize($newCache));
+        file_put_contents($outputFile, $newCache['compiled']);
+      }
+    }
+
+    autoCompileLess('myfile.less', 'myfile.css');
+    ```
+
+`cachedCompile` method takes an optional second argument, `$force`. Passing in
+true will cause the input to always be recompiled.
+
+### Error Handling
+
+All of the compile methods will throw an `Exception` if the parsing fails or
+there is a compile time error. Compile time errors include things like passing
+incorrectly typed values for functions that expect specific things, like the
+color manipulation functions.
+
+    ```php
+    $less = new lessc;
+    try {
+        $less->compile("} invalid LESS }}}");
+    } catch (Exception $ex) {
+        echo "lessphp fatal error: ".$ex->getMessage();
+    }
+    ```
+### Setting Variables From PHP
+
+Before compiling any code you can set initial LESS variables from PHP. The
+`setVariables` method lets us do this. It takes an associative array of names
+to values. The values must be strings, and will be parsed into correct CSS
+values.
+
+
+    ```php
+    $less = new lessc;
+
+    $less->setVariables(array(
+      "color" => "red",
+      "base" => "960px"
+    ));
+
+    echo $less->compile(".magic { color: @color;  width: @base - 200; }");
+    ```
+
+If you need to unset a variable, the `unsetVariable` method is available. It
+takes the name of the variable to unset.
+
+    ```php
+    $less->unsetVariable("color");
+    ```
+
+Be aware that the value of the variable is a string containing a CSS value. So
+if you want to pass a LESS string in, you're going to need two sets of quotes.
+One for PHP and one for LESS.
+
+
+    ```php
+    $less->setVariables(array(
+      "url" => "'http://example.com.com/'"
+    ));
+
+    echo $less->compile("body { background: url("@{url}/bg.png"); }");
+    ```
+
+### Import Directory
+
+When running the `@import` directive, an array of directories called the import
+search path is searched through to find the file being asked for.
+
+By default, when using `compile`, the import search path just contains `""`,
+which is equivalent to the current directory of the script. If `compileFile` is
+used, then the directory of the file being compiled is used as the starting
+import search path.
+
+Two methods are available for configuring the search path.
+
+`setImportDir` will overwrite the search path with its argument. If the value
+isn't an array it will be converted to one.
+
+
+In this example, `@import "colors";` will look for either
+`assets/less/colors.less` or `assets/bootstrap/colors.less` in that order:
+
+    ```php
+    $less->setImportDir(array("assets/less/", "assets/bootstrap"));
+
+    echo $less->compile('@import "colors";');
+    ```
+
+`addImportDir` will append a single path to the import search path instead of
+overwriting the whole thing.
+
+    ```php
+    $less->addImportDir("public/stylesheets");
+    ```
+
+### Custom Functions
+
+**lessphp** has a simple extension interface where you can implement user
+functions that will be exposed in LESS code during the compile. They can be a
+little tricky though because you need to work with the **lessphp** type system.
+
+The two methods we are interested in are `registerFunction` and
+`unregisterFunction`. `registerFunction` takes two arguments, a name and a
+callable value. `unregisterFunction` just takes the name of an existing
+function to remove.
+
+Here's an example that adds a function called `double` that doubles any numeric
+argument:
+
+    ```php
+    <?php
+    include "lessc.inc.php";
+
+    function lessphp_double($arg) {
+        list($type, $value) = $arg;
+        return array($type, $value*2);
+    }
+
+    $less = new lessc;
+    $less->registerFunction("double", "lessphp_double");
+
+    // gives us a width of 800px
+    echo $less->compile("div { width: double(400px); }");
+    ```
+
+The second argument to `registerFunction` is any *callable value* that is
+understood by [`call_user_func`](http://php.net/call_user_func).
+
+If we are using PHP 5.3 or above then we are free to pass a function literal
+like so:
+
+    ```php
+    $less->registerFunction("double", function($arg) {
+        list($type, $value, $unit) = $arg;
+        return array($type, $value*2, $unit);
+    });
+    ```
+
+Now let's talk about the `double` function itself.
+
+Although a little verbose, the implementation gives us some insight on the type
+system. All values in **lessphp** are stored in an array where the 0th element
+is a string representing the type, and the other elements make up the
+associated data for that value.
+
+The best way to get an understanding of the system is to register is dummy
+function which does a `var_dump` on the argument. Try passing the function
+different values from LESS and see what the results are.
+
+The return value of the registered function must also be a **lessphp** type,
+but if it is a string or numeric value, it will automatically be coerced into
+an appropriate typed value. In our example, we reconstruct the value with our
+modifications while making sure that we preserve the original type.
+
+The instance of **lessphp** itself is sent to the registered function as the
+second argument in addition to the arguments array.
+
+## Command Line Interface
+
+**lessphp** comes with a command line script written in PHP that can be used to
+invoke the compiler from the terminal. On Linux and OSX, all you need to do is
+place `plessc` and `lessc.inc.php` somewhere in your PATH (or you can run it in
+the current directory as well). On windows you'll need a copy of `php.exe` to
+run the file. To compile a file, `input.less` to CSS, run:
+
+    ```bash
+    $ plessc input.less
+    ```
+
+To write to a file, redirect standard out:
+
+    ```bash
+    $ plessc input.less > output.css
+    ```
+
+To compile code directly on the command line:
+
+    ```bash
+    $ plessc -r "@color: red; body { color: @color; }"
+    ```
+
+To watch a file for changes, and compile it as needed, use the `-w` flag:
+
+    ```bash
+    $ plessc -w input-file output-file
+    ```
+
+Errors from watch mode are written to standard out.
+
+
+## License
+
+Copyright (c) 2012 Leaf Corcoran, <http://leafo.net/lessphp>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+*Also under GPL3 if required, see `LICENSE` file*
+
diff --git a/vendor/leafo/lessphp/lessc.inc.php b/vendor/leafo/lessphp/lessc.inc.php
new file mode 100644
index 00000000..2292f219
--- /dev/null
+++ b/vendor/leafo/lessphp/lessc.inc.php
@@ -0,0 +1,3768 @@
+<?php
+
+/**
+ * lessphp v0.5.0
+ * http://leafo.net/lessphp
+ *
+ * LESS CSS compiler, adapted from http://lesscss.org
+ *
+ * Copyright 2013, Leaf Corcoran <leafot@gmail.com>
+ * Licensed under MIT or GPLv3, see LICENSE
+ */
+
+
+/**
+ * The LESS compiler and parser.
+ *
+ * Converting LESS to CSS is a three stage process. The incoming file is parsed
+ * by `lessc_parser` into a syntax tree, then it is compiled into another tree
+ * representing the CSS structure by `lessc`. The CSS tree is fed into a
+ * formatter, like `lessc_formatter` which then outputs CSS as a string.
+ *
+ * During the first compile, all values are *reduced*, which means that their
+ * types are brought to the lowest form before being dump as strings. This
+ * handles math equations, variable dereferences, and the like.
+ *
+ * The `parse` function of `lessc` is the entry point.
+ *
+ * In summary:
+ *
+ * The `lessc` class creates an instance of the parser, feeds it LESS code,
+ * then transforms the resulting tree to a CSS tree. This class also holds the
+ * evaluation context, such as all available mixins and variables at any given
+ * time.
+ *
+ * The `lessc_parser` class is only concerned with parsing its input.
+ *
+ * The `lessc_formatter` takes a CSS tree, and dumps it to a formatted string,
+ * handling things like indentation.
+ */
+class lessc {
+	static public $VERSION = "v0.5.0";
+
+	static public $TRUE = array("keyword", "true");
+	static public $FALSE = array("keyword", "false");
+
+	protected $libFunctions = array();
+	protected $registeredVars = array();
+	protected $preserveComments = false;
+
+	public $vPrefix = '@'; // prefix of abstract properties
+	public $mPrefix = '$'; // prefix of abstract blocks
+	public $parentSelector = '&';
+
+	public $importDisabled = false;
+	public $importDir = '';
+
+	protected $numberPrecision = null;
+
+	protected $allParsedFiles = array();
+
+	// set to the parser that generated the current line when compiling
+	// so we know how to create error messages
+	protected $sourceParser = null;
+	protected $sourceLoc = null;
+
+	static protected $nextImportId = 0; // uniquely identify imports
+
+	// attempts to find the path of an import url, returns null for css files
+	protected function findImport($url) {
+		foreach ((array)$this->importDir as $dir) {
+			$full = $dir.(substr($dir, -1) != '/' ? '/' : '').$url;
+			if ($this->fileExists($file = $full.'.less') || $this->fileExists($file = $full)) {
+				return $file;
+			}
+		}
+
+		return null;
+	}
+
+	protected function fileExists($name) {
+		return is_file($name);
+	}
+
+	static public function compressList($items, $delim) {
+		if (!isset($items[1]) && isset($items[0])) return $items[0];
+		else return array('list', $delim, $items);
+	}
+
+	static public function preg_quote($what) {
+		return preg_quote($what, '/');
+	}
+
+	protected function tryImport($importPath, $parentBlock, $out) {
+		if ($importPath[0] == "function" && $importPath[1] == "url") {
+			$importPath = $this->flattenList($importPath[2]);
+		}
+
+		$str = $this->coerceString($importPath);
+		if ($str === null) return false;
+
+		$url = $this->compileValue($this->lib_e($str));
+
+		// don't import if it ends in css
+		if (substr_compare($url, '.css', -4, 4) === 0) return false;
+
+		$realPath = $this->findImport($url);
+
+		if ($realPath === null) return false;
+
+		if ($this->importDisabled) {
+			return array(false, "/* import disabled */");
+		}
+
+		if (isset($this->allParsedFiles[realpath($realPath)])) {
+			return array(false, null);
+		}
+
+		$this->addParsedFile($realPath);
+		$parser = $this->makeParser($realPath);
+		$root = $parser->parse(file_get_contents($realPath));
+
+		// set the parents of all the block props
+		foreach ($root->props as $prop) {
+			if ($prop[0] == "block") {
+				$prop[1]->parent = $parentBlock;
+			}
+		}
+
+		// copy mixins into scope, set their parents
+		// bring blocks from import into current block
+		// TODO: need to mark the source parser	these came from this file
+		foreach ($root->children as $childName => $child) {
+			if (isset($parentBlock->children[$childName])) {
+				$parentBlock->children[$childName] = array_merge(
+					$parentBlock->children[$childName],
+					$child);
+			} else {
+				$parentBlock->children[$childName] = $child;
+			}
+		}
+
+		$pi = pathinfo($realPath);
+		$dir = $pi["dirname"];
+
+		list($top, $bottom) = $this->sortProps($root->props, true);
+		$this->compileImportedProps($top, $parentBlock, $out, $parser, $dir);
+
+		return array(true, $bottom, $parser, $dir);
+	}
+
+	protected function compileImportedProps($props, $block, $out, $sourceParser, $importDir) {
+		$oldSourceParser = $this->sourceParser;
+
+		$oldImport = $this->importDir;
+
+		// TODO: this is because the importDir api is stupid
+		$this->importDir = (array)$this->importDir;
+		array_unshift($this->importDir, $importDir);
+
+		foreach ($props as $prop) {
+			$this->compileProp($prop, $block, $out);
+		}
+
+		$this->importDir = $oldImport;
+		$this->sourceParser = $oldSourceParser;
+	}
+
+	/**
+	 * Recursively compiles a block.
+	 *
+	 * A block is analogous to a CSS block in most cases. A single LESS document
+	 * is encapsulated in a block when parsed, but it does not have parent tags
+	 * so all of it's children appear on the root level when compiled.
+	 *
+	 * Blocks are made up of props and children.
+	 *
+	 * Props are property instructions, array tuples which describe an action
+	 * to be taken, eg. write a property, set a variable, mixin a block.
+	 *
+	 * The children of a block are just all the blocks that are defined within.
+	 * This is used to look up mixins when performing a mixin.
+	 *
+	 * Compiling the block involves pushing a fresh environment on the stack,
+	 * and iterating through the props, compiling each one.
+	 *
+	 * See lessc::compileProp()
+	 *
+	 */
+	protected function compileBlock($block) {
+		switch ($block->type) {
+		case "root":
+			$this->compileRoot($block);
+			break;
+		case null:
+			$this->compileCSSBlock($block);
+			break;
+		case "media":
+			$this->compileMedia($block);
+			break;
+		case "directive":
+			$name = "@" . $block->name;
+			if (!empty($block->value)) {
+				$name .= " " . $this->compileValue($this->reduce($block->value));
+			}
+
+			$this->compileNestedBlock($block, array($name));
+			break;
+		default:
+			$this->throwError("unknown block type: $block->type\n");
+		}
+	}
+
+	protected function compileCSSBlock($block) {
+		$env = $this->pushEnv();
+
+		$selectors = $this->compileSelectors($block->tags);
+		$env->selectors = $this->multiplySelectors($selectors);
+		$out = $this->makeOutputBlock(null, $env->selectors);
+
+		$this->scope->children[] = $out;
+		$this->compileProps($block, $out);
+
+		$block->scope = $env; // mixins carry scope with them!
+		$this->popEnv();
+	}
+
+	protected function compileMedia($media) {
+		$env = $this->pushEnv($media);
+		$parentScope = $this->mediaParent($this->scope);
+
+		$query = $this->compileMediaQuery($this->multiplyMedia($env));
+
+		$this->scope = $this->makeOutputBlock($media->type, array($query));
+		$parentScope->children[] = $this->scope;
+
+		$this->compileProps($media, $this->scope);
+
+		if (count($this->scope->lines) > 0) {
+			$orphanSelelectors = $this->findClosestSelectors();
+			if (!is_null($orphanSelelectors)) {
+				$orphan = $this->makeOutputBlock(null, $orphanSelelectors);
+				$orphan->lines = $this->scope->lines;
+				array_unshift($this->scope->children, $orphan);
+				$this->scope->lines = array();
+			}
+		}
+
+		$this->scope = $this->scope->parent;
+		$this->popEnv();
+	}
+
+	protected function mediaParent($scope) {
+		while (!empty($scope->parent)) {
+			if (!empty($scope->type) && $scope->type != "media") {
+				break;
+			}
+			$scope = $scope->parent;
+		}
+
+		return $scope;
+	}
+
+	protected function compileNestedBlock($block, $selectors) {
+		$this->pushEnv($block);
+		$this->scope = $this->makeOutputBlock($block->type, $selectors);
+		$this->scope->parent->children[] = $this->scope;
+
+		$this->compileProps($block, $this->scope);
+
+		$this->scope = $this->scope->parent;
+		$this->popEnv();
+	}
+
+	protected function compileRoot($root) {
+		$this->pushEnv();
+		$this->scope = $this->makeOutputBlock($root->type);
+		$this->compileProps($root, $this->scope);
+		$this->popEnv();
+	}
+
+	protected function compileProps($block, $out) {
+		foreach ($this->sortProps($block->props) as $prop) {
+			$this->compileProp($prop, $block, $out);
+		}
+		$out->lines = $this->deduplicate($out->lines);
+	}
+
+	/**
+	 * Deduplicate lines in a block. Comments are not deduplicated. If a
+	 * duplicate rule is detected, the comments immediately preceding each
+	 * occurence are consolidated.
+	 */
+	protected function deduplicate($lines) {
+		$unique = array();
+		$comments = array();
+
+		foreach($lines as $line) {
+			if (strpos($line, '/*') === 0) {
+				$comments[] = $line;
+				continue;
+			}
+			if (!in_array($line, $unique)) {
+				$unique[] = $line;
+			}
+			array_splice($unique, array_search($line, $unique), 0, $comments);
+			$comments = array();
+		}
+		return array_merge($unique, $comments);
+	}
+
+	protected function sortProps($props, $split = false) {
+		$vars = array();
+		$imports = array();
+		$other = array();
+		$stack = array();
+
+		foreach ($props as $prop) {
+			switch ($prop[0]) {
+			case "comment":
+				$stack[] = $prop;
+				break;
+			case "assign":
+				$stack[] = $prop;
+				if (isset($prop[1][0]) && $prop[1][0] == $this->vPrefix) {
+					$vars = array_merge($vars, $stack);
+				} else {
+					$other = array_merge($other, $stack);
+				}
+				$stack = array();
+				break;
+			case "import":
+				$id = self::$nextImportId++;
+				$prop[] = $id;
+				$stack[] = $prop;
+				$imports = array_merge($imports, $stack);
+				$other[] = array("import_mixin", $id);
+				$stack = array();
+				break;
+			default:
+				$stack[] = $prop;
+				$other = array_merge($other, $stack);
+				$stack = array();
+				break;
+			}
+		}
+		$other = array_merge($other, $stack);
+
+		if ($split) {
+			return array(array_merge($imports, $vars), $other);
+		} else {
+			return array_merge($imports, $vars, $other);
+		}
+	}
+
+	protected function compileMediaQuery($queries) {
+		$compiledQueries = array();
+		foreach ($queries as $query) {
+			$parts = array();
+			foreach ($query as $q) {
+				switch ($q[0]) {
+				case "mediaType":
+					$parts[] = implode(" ", array_slice($q, 1));
+					break;
+				case "mediaExp":
+					if (isset($q[2])) {
+						$parts[] = "($q[1]: " .
+							$this->compileValue($this->reduce($q[2])) . ")";
+					} else {
+						$parts[] = "($q[1])";
+					}
+					break;
+				case "variable":
+					$parts[] = $this->compileValue($this->reduce($q));
+				break;
+				}
+			}
+
+			if (count($parts) > 0) {
+				$compiledQueries[] =  implode(" and ", $parts);
+			}
+		}
+
+		$out = "@media";
+		if (!empty($parts)) {
+			$out .= " " .
+				implode($this->formatter->selectorSeparator, $compiledQueries);
+		}
+		return $out;
+	}
+
+	protected function multiplyMedia($env, $childQueries = null) {
+		if (is_null($env) ||
+			!empty($env->block->type) && $env->block->type != "media")
+		{
+			return $childQueries;
+		}
+
+		// plain old block, skip
+		if (empty($env->block->type)) {
+			return $this->multiplyMedia($env->parent, $childQueries);
+		}
+
+		$out = array();
+		$queries = $env->block->queries;
+		if (is_null($childQueries)) {
+			$out = $queries;
+		} else {
+			foreach ($queries as $parent) {
+				foreach ($childQueries as $child) {
+					$out[] = array_merge($parent, $child);
+				}
+			}
+		}
+
+		return $this->multiplyMedia($env->parent, $out);
+	}
+
+	protected function expandParentSelectors(&$tag, $replace) {
+		$parts = explode("$&$", $tag);
+		$count = 0;
+		foreach ($parts as &$part) {
+			$part = str_replace($this->parentSelector, $replace, $part, $c);
+			$count += $c;
+		}
+		$tag = implode($this->parentSelector, $parts);
+		return $count;
+	}
+
+	protected function findClosestSelectors() {
+		$env = $this->env;
+		$selectors = null;
+		while ($env !== null) {
+			if (isset($env->selectors)) {
+				$selectors = $env->selectors;
+				break;
+			}
+			$env = $env->parent;
+		}
+
+		return $selectors;
+	}
+
+
+	// multiply $selectors against the nearest selectors in env
+	protected function multiplySelectors($selectors) {
+		// find parent selectors
+
+		$parentSelectors = $this->findClosestSelectors();
+		if (is_null($parentSelectors)) {
+			// kill parent reference in top level selector
+			foreach ($selectors as &$s) {
+				$this->expandParentSelectors($s, "");
+			}
+
+			return $selectors;
+		}
+
+		$out = array();
+		foreach ($parentSelectors as $parent) {
+			foreach ($selectors as $child) {
+				$count = $this->expandParentSelectors($child, $parent);
+
+				// don't prepend the parent tag if & was used
+				if ($count > 0) {
+					$out[] = trim($child);
+				} else {
+					$out[] = trim($parent . ' ' . $child);
+				}
+			}
+		}
+
+		return $out;
+	}
+
+	// reduces selector expressions
+	protected function compileSelectors($selectors) {
+		$out = array();
+
+		foreach ($selectors as $s) {
+			if (is_array($s)) {
+				list(, $value) = $s;
+				$out[] = trim($this->compileValue($this->reduce($value)));
+			} else {
+				$out[] = $s;
+			}
+		}
+
+		return $out;
+	}
+
+	protected function eq($left, $right) {
+		return $left == $right;
+	}
+
+	protected function patternMatch($block, $orderedArgs, $keywordArgs) {
+		// match the guards if it has them
+		// any one of the groups must have all its guards pass for a match
+		if (!empty($block->guards)) {
+			$groupPassed = false;
+			foreach ($block->guards as $guardGroup) {
+				foreach ($guardGroup as $guard) {
+					$this->pushEnv();
+					$this->zipSetArgs($block->args, $orderedArgs, $keywordArgs);
+
+					$negate = false;
+					if ($guard[0] == "negate") {
+						$guard = $guard[1];
+						$negate = true;
+					}
+
+					$passed = $this->reduce($guard) == self::$TRUE;
+					if ($negate) $passed = !$passed;
+
+					$this->popEnv();
+
+					if ($passed) {
+						$groupPassed = true;
+					} else {
+						$groupPassed = false;
+						break;
+					}
+				}
+
+				if ($groupPassed) break;
+			}
+
+			if (!$groupPassed) {
+				return false;
+			}
+		}
+
+		if (empty($block->args)) {
+			return $block->isVararg || empty($orderedArgs) && empty($keywordArgs);
+		}
+
+		$remainingArgs = $block->args;
+		if ($keywordArgs) {
+			$remainingArgs = array();
+			foreach ($block->args as $arg) {
+				if ($arg[0] == "arg" && isset($keywordArgs[$arg[1]])) {
+					continue;
+				}
+
+				$remainingArgs[] = $arg;
+			}
+		}
+
+		$i = -1; // no args
+		// try to match by arity or by argument literal
+		foreach ($remainingArgs as $i => $arg) {
+			switch ($arg[0]) {
+			case "lit":
+				if (empty($orderedArgs[$i]) || !$this->eq($arg[1], $orderedArgs[$i])) {
+					return false;
+				}
+				break;
+			case "arg":
+				// no arg and no default value
+				if (!isset($orderedArgs[$i]) && !isset($arg[2])) {
+					return false;
+				}
+				break;
+			case "rest":
+				$i--; // rest can be empty
+				break 2;
+			}
+		}
+
+		if ($block->isVararg) {
+			return true; // not having enough is handled above
+		} else {
+			$numMatched = $i + 1;
+			// greater than becuase default values always match
+			return $numMatched >= count($orderedArgs);
+		}
+	}
+
+	protected function patternMatchAll($blocks, $orderedArgs, $keywordArgs, $skip=array()) {
+		$matches = null;
+		foreach ($blocks as $block) {
+			// skip seen blocks that don't have arguments
+			if (isset($skip[$block->id]) && !isset($block->args)) {
+				continue;
+			}
+
+			if ($this->patternMatch($block, $orderedArgs, $keywordArgs)) {
+				$matches[] = $block;
+			}
+		}
+
+		return $matches;
+	}
+
+	// attempt to find blocks matched by path and args
+	protected function findBlocks($searchIn, $path, $orderedArgs, $keywordArgs, $seen=array()) {
+		if ($searchIn == null) return null;
+		if (isset($seen[$searchIn->id])) return null;
+		$seen[$searchIn->id] = true;
+
+		$name = $path[0];
+
+		if (isset($searchIn->children[$name])) {
+			$blocks = $searchIn->children[$name];
+			if (count($path) == 1) {
+				$matches = $this->patternMatchAll($blocks, $orderedArgs, $keywordArgs, $seen);
+				if (!empty($matches)) {
+					// This will return all blocks that match in the closest
+					// scope that has any matching block, like lessjs
+					return $matches;
+				}
+			} else {
+				$matches = array();
+				foreach ($blocks as $subBlock) {
+					$subMatches = $this->findBlocks($subBlock,
+						array_slice($path, 1), $orderedArgs, $keywordArgs, $seen);
+
+					if (!is_null($subMatches)) {
+						foreach ($subMatches as $sm) {
+							$matches[] = $sm;
+						}
+					}
+				}
+
+				return count($matches) > 0 ? $matches : null;
+			}
+		}
+		if ($searchIn->parent === $searchIn) return null;
+		return $this->findBlocks($searchIn->parent, $path, $orderedArgs, $keywordArgs, $seen);
+	}
+
+	// sets all argument names in $args to either the default value
+	// or the one passed in through $values
+	protected function zipSetArgs($args, $orderedValues, $keywordValues) {
+		$assignedValues = array();
+
+		$i = 0;
+		foreach ($args as  $a) {
+			if ($a[0] == "arg") {
+				if (isset($keywordValues[$a[1]])) {
+					// has keyword arg
+					$value = $keywordValues[$a[1]];
+				} elseif (isset($orderedValues[$i])) {
+					// has ordered arg
+					$value = $orderedValues[$i];
+					$i++;
+				} elseif (isset($a[2])) {
+					// has default value
+					$value = $a[2];
+				} else {
+					$this->throwError("Failed to assign arg " . $a[1]);
+					$value = null; // :(
+				}
+
+				$value = $this->reduce($value);
+				$this->set($a[1], $value);
+				$assignedValues[] = $value;
+			} else {
+				// a lit
+				$i++;
+			}
+		}
+
+		// check for a rest
+		$last = end($args);
+		if ($last[0] == "rest") {
+			$rest = array_slice($orderedValues, count($args) - 1);
+			$this->set($last[1], $this->reduce(array("list", " ", $rest)));
+		}
+
+		// wow is this the only true use of PHP's + operator for arrays?
+		$this->env->arguments = $assignedValues + $orderedValues;
+	}
+
+	// compile a prop and update $lines or $blocks appropriately
+	protected function compileProp($prop, $block, $out) {
+		// set error position context
+		$this->sourceLoc = isset($prop[-1]) ? $prop[-1] : -1;
+
+		switch ($prop[0]) {
+		case 'assign':
+			list(, $name, $value) = $prop;
+			if ($name[0] == $this->vPrefix) {
+				$this->set($name, $value);
+			} else {
+				$out->lines[] = $this->formatter->property($name,
+						$this->compileValue($this->reduce($value)));
+			}
+			break;
+		case 'block':
+			list(, $child) = $prop;
+			$this->compileBlock($child);
+			break;
+		case 'mixin':
+			list(, $path, $args, $suffix) = $prop;
+
+			$orderedArgs = array();
+			$keywordArgs = array();
+			foreach ((array)$args as $arg) {
+				$argval = null;
+				switch ($arg[0]) {
+				case "arg":
+					if (!isset($arg[2])) {
+						$orderedArgs[] = $this->reduce(array("variable", $arg[1]));
+					} else {
+						$keywordArgs[$arg[1]] = $this->reduce($arg[2]);
+					}
+					break;
+
+				case "lit":
+					$orderedArgs[] = $this->reduce($arg[1]);
+					break;
+				default:
+					$this->throwError("Unknown arg type: " . $arg[0]);
+				}
+			}
+
+			$mixins = $this->findBlocks($block, $path, $orderedArgs, $keywordArgs);
+
+			if ($mixins === null) {
+				$this->throwError("{$prop[1][0]} is undefined");
+			}
+
+			foreach ($mixins as $mixin) {
+				if ($mixin === $block && !$orderedArgs) {
+					continue;
+				}
+
+				$haveScope = false;
+				if (isset($mixin->parent->scope)) {
+					$haveScope = true;
+					$mixinParentEnv = $this->pushEnv();
+					$mixinParentEnv->storeParent = $mixin->parent->scope;
+				}
+
+				$haveArgs = false;
+				if (isset($mixin->args)) {
+					$haveArgs = true;
+					$this->pushEnv();
+					$this->zipSetArgs($mixin->args, $orderedArgs, $keywordArgs);
+				}
+
+				$oldParent = $mixin->parent;
+				if ($mixin != $block) $mixin->parent = $block;
+
+				foreach ($this->sortProps($mixin->props) as $subProp) {
+					if ($suffix !== null &&
+						$subProp[0] == "assign" &&
+						is_string($subProp[1]) &&
+						$subProp[1]{0} != $this->vPrefix)
+					{
+						$subProp[2] = array(
+							'list', ' ',
+							array($subProp[2], array('keyword', $suffix))
+						);
+					}
+
+					$this->compileProp($subProp, $mixin, $out);
+				}
+
+				$mixin->parent = $oldParent;
+
+				if ($haveArgs) $this->popEnv();
+				if ($haveScope) $this->popEnv();
+			}
+
+			break;
+		case 'raw':
+			$out->lines[] = $prop[1];
+			break;
+		case "directive":
+			list(, $name, $value) = $prop;
+			$out->lines[] = "@$name " . $this->compileValue($this->reduce($value)).';';
+			break;
+		case "comment":
+			$out->lines[] = $prop[1];
+			break;
+		case "import";
+			list(, $importPath, $importId) = $prop;
+			$importPath = $this->reduce($importPath);
+
+			if (!isset($this->env->imports)) {
+				$this->env->imports = array();
+			}
+
+			$result = $this->tryImport($importPath, $block, $out);
+
+			$this->env->imports[$importId] = $result === false ?
+				array(false, "@import " . $this->compileValue($importPath).";") :
+				$result;
+
+			break;
+		case "import_mixin":
+			list(,$importId) = $prop;
+			$import = $this->env->imports[$importId];
+			if ($import[0] === false) {
+				if (isset($import[1])) {
+					$out->lines[] = $import[1];
+				}
+			} else {
+				list(, $bottom, $parser, $importDir) = $import;
+				$this->compileImportedProps($bottom, $block, $out, $parser, $importDir);
+			}
+
+			break;
+		default:
+			$this->throwError("unknown op: {$prop[0]}\n");
+		}
+	}
+
+
+	/**
+	 * Compiles a primitive value into a CSS property value.
+	 *
+	 * Values in lessphp are typed by being wrapped in arrays, their format is
+	 * typically:
+	 *
+	 *     array(type, contents [, additional_contents]*)
+	 *
+	 * The input is expected to be reduced. This function will not work on
+	 * things like expressions and variables.
+	 */
+	public function compileValue($value) {
+		switch ($value[0]) {
+		case 'list':
+			// [1] - delimiter
+			// [2] - array of values
+			return implode($value[1], array_map(array($this, 'compileValue'), $value[2]));
+		case 'raw_color':
+			if (!empty($this->formatter->compressColors)) {
+				return $this->compileValue($this->coerceColor($value));
+			}
+			return $value[1];
+		case 'keyword':
+			// [1] - the keyword
+			return $value[1];
+		case 'number':
+			list(, $num, $unit) = $value;
+			// [1] - the number
+			// [2] - the unit
+			if ($this->numberPrecision !== null) {
+				$num = round($num, $this->numberPrecision);
+			}
+			return $num . $unit;
+		case 'string':
+			// [1] - contents of string (includes quotes)
+			list(, $delim, $content) = $value;
+			foreach ($content as &$part) {
+				if (is_array($part)) {
+					$part = $this->compileValue($part);
+				}
+			}
+			return $delim . implode($content) . $delim;
+		case 'color':
+			// [1] - red component (either number or a %)
+			// [2] - green component
+			// [3] - blue component
+			// [4] - optional alpha component
+			list(, $r, $g, $b) = $value;
+			$r = round($r);
+			$g = round($g);
+			$b = round($b);
+
+			if (count($value) == 5 && $value[4] != 1) { // rgba
+				return 'rgba('.$r.','.$g.','.$b.','.$value[4].')';
+			}
+
+			$h = sprintf("#%02x%02x%02x", $r, $g, $b);
+
+			if (!empty($this->formatter->compressColors)) {
+				// Converting hex color to short notation (e.g. #003399 to #039)
+				if ($h[1] === $h[2] && $h[3] === $h[4] && $h[5] === $h[6]) {
+					$h = '#' . $h[1] . $h[3] . $h[5];
+				}
+			}
+
+			return $h;
+
+		case 'function':
+			list(, $name, $args) = $value;
+			return $name.'('.$this->compileValue($args).')';
+		default: // assumed to be unit
+			$this->throwError("unknown value type: $value[0]");
+		}
+	}
+
+	protected function lib_pow($args) {
+		list($base, $exp) = $this->assertArgs($args, 2, "pow");
+		return pow($this->assertNumber($base), $this->assertNumber($exp));
+	}
+
+	protected function lib_pi() {
+		return pi();
+	}
+
+	protected function lib_mod($args) {
+		list($a, $b) = $this->assertArgs($args, 2, "mod");
+		return $this->assertNumber($a) % $this->assertNumber($b);
+	}
+
+	protected function lib_tan($num) {
+		return tan($this->assertNumber($num));
+	}
+
+	protected function lib_sin($num) {
+		return sin($this->assertNumber($num));
+	}
+
+	protected function lib_cos($num) {
+		return cos($this->assertNumber($num));
+	}
+
+	protected function lib_atan($num) {
+		$num = atan($this->assertNumber($num));
+		return array("number", $num, "rad");
+	}
+
+	protected function lib_asin($num) {
+		$num = asin($this->assertNumber($num));
+		return array("number", $num, "rad");
+	}
+
+	protected function lib_acos($num) {
+		$num = acos($this->assertNumber($num));
+		return array("number", $num, "rad");
+	}
+
+	protected function lib_sqrt($num) {
+		return sqrt($this->assertNumber($num));
+	}
+
+	protected function lib_extract($value) {
+		list($list, $idx) = $this->assertArgs($value, 2, "extract");
+		$idx = $this->assertNumber($idx);
+		// 1 indexed
+		if ($list[0] == "list" && isset($list[2][$idx - 1])) {
+			return $list[2][$idx - 1];
+		}
+	}
+
+	protected function lib_isnumber($value) {
+		return $this->toBool($value[0] == "number");
+	}
+
+	protected function lib_isstring($value) {
+		return $this->toBool($value[0] == "string");
+	}
+
+	protected function lib_iscolor($value) {
+		return $this->toBool($this->coerceColor($value));
+	}
+
+	protected function lib_iskeyword($value) {
+		return $this->toBool($value[0] == "keyword");
+	}
+
+	protected function lib_ispixel($value) {
+		return $this->toBool($value[0] == "number" && $value[2] == "px");
+	}
+
+	protected function lib_ispercentage($value) {
+		return $this->toBool($value[0] == "number" && $value[2] == "%");
+	}
+
+	protected function lib_isem($value) {
+		return $this->toBool($value[0] == "number" && $value[2] == "em");
+	}
+
+	protected function lib_isrem($value) {
+		return $this->toBool($value[0] == "number" && $value[2] == "rem");
+	}
+
+	protected function lib_rgbahex($color) {
+		$color = $this->coerceColor($color);
+		if (is_null($color))
+			$this->throwError("color expected for rgbahex");
+
+		return sprintf("#%02x%02x%02x%02x",
+			isset($color[4]) ? $color[4]*255 : 255,
+			$color[1],$color[2], $color[3]);
+	}
+
+	protected function lib_argb($color){
+		return $this->lib_rgbahex($color);
+	}
+
+	/**
+	 * Given an url, decide whether to output a regular link or the base64-encoded contents of the file
+	 *
+	 * @param  array  $value either an argument list (two strings) or a single string
+	 * @return string        formatted url(), either as a link or base64-encoded
+	 */
+	protected function lib_data_uri($value) {
+		$mime = ($value[0] === 'list') ? $value[2][0][2] : null;
+		$url = ($value[0] === 'list') ? $value[2][1][2][0] : $value[2][0];
+
+		$fullpath = $this->findImport($url);
+
+		if($fullpath && ($fsize = filesize($fullpath)) !== false) {
+			// IE8 can't handle data uris larger than 32KB
+			if($fsize/1024 < 32) {
+				if(is_null($mime)) {
+					if(class_exists('finfo')) { // php 5.3+
+						$finfo = new finfo(FILEINFO_MIME);
+						$mime = explode('; ', $finfo->file($fullpath));
+						$mime = $mime[0];
+					} elseif(function_exists('mime_content_type')) { // PHP 5.2
+						$mime = mime_content_type($fullpath);
+					}
+				}
+
+				if(!is_null($mime)) // fallback if the mime type is still unknown
+					$url = sprintf('data:%s;base64,%s', $mime, base64_encode(file_get_contents($fullpath)));
+			}
+		}
+
+		return 'url("'.$url.'")';
+	}
+
+	// utility func to unquote a string
+	protected function lib_e($arg) {
+		switch ($arg[0]) {
+			case "list":
+				$items = $arg[2];
+				if (isset($items[0])) {
+					return $this->lib_e($items[0]);
+				}
+				$this->throwError("unrecognised input");
+			case "string":
+				$arg[1] = "";
+				return $arg;
+			case "keyword":
+				return $arg;
+			default:
+				return array("keyword", $this->compileValue($arg));
+		}
+	}
+
+	protected function lib__sprintf($args) {
+		if ($args[0] != "list") return $args;
+		$values = $args[2];
+		$string = array_shift($values);
+		$template = $this->compileValue($this->lib_e($string));
+
+		$i = 0;
+		if (preg_match_all('/%[dsa]/', $template, $m)) {
+			foreach ($m[0] as $match) {
+				$val = isset($values[$i]) ?
+					$this->reduce($values[$i]) : array('keyword', '');
+
+				// lessjs compat, renders fully expanded color, not raw color
+				if ($color = $this->coerceColor($val)) {
+					$val = $color;
+				}
+
+				$i++;
+				$rep = $this->compileValue($this->lib_e($val));
+				$template = preg_replace('/'.self::preg_quote($match).'/',
+					$rep, $template, 1);
+			}
+		}
+
+		$d = $string[0] == "string" ? $string[1] : '"';
+		return array("string", $d, array($template));
+	}
+
+	protected function lib_floor($arg) {
+		$value = $this->assertNumber($arg);
+		return array("number", floor($value), $arg[2]);
+	}
+
+	protected function lib_ceil($arg) {
+		$value = $this->assertNumber($arg);
+		return array("number", ceil($value), $arg[2]);
+	}
+
+	protected function lib_round($arg) {
+		if($arg[0] != "list") {
+			$value = $this->assertNumber($arg);
+			return array("number", round($value), $arg[2]);
+		} else {
+			$value = $this->assertNumber($arg[2][0]);
+			$precision = $this->assertNumber($arg[2][1]);
+			return array("number", round($value, $precision), $arg[2][0][2]);
+		}
+	}
+
+	protected function lib_unit($arg) {
+		if ($arg[0] == "list") {
+			list($number, $newUnit) = $arg[2];
+			return array("number", $this->assertNumber($number),
+				$this->compileValue($this->lib_e($newUnit)));
+		} else {
+			return array("number", $this->assertNumber($arg), "");
+		}
+	}
+
+	/**
+	 * Helper function to get arguments for color manipulation functions.
+	 * takes a list that contains a color like thing and a percentage
+	 */
+	public function colorArgs($args) {
+		if ($args[0] != 'list' || count($args[2]) < 2) {
+			return array(array('color', 0, 0, 0), 0);
+		}
+		list($color, $delta) = $args[2];
+		$color = $this->assertColor($color);
+		$delta = floatval($delta[1]);
+
+		return array($color, $delta);
+	}
+
+	protected function lib_darken($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+		$hsl[3] = $this->clamp($hsl[3] - $delta, 100);
+		return $this->toRGB($hsl);
+	}
+
+	protected function lib_lighten($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+		$hsl[3] = $this->clamp($hsl[3] + $delta, 100);
+		return $this->toRGB($hsl);
+	}
+
+	protected function lib_saturate($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+		$hsl[2] = $this->clamp($hsl[2] + $delta, 100);
+		return $this->toRGB($hsl);
+	}
+
+	protected function lib_desaturate($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+		$hsl[2] = $this->clamp($hsl[2] - $delta, 100);
+		return $this->toRGB($hsl);
+	}
+
+	protected function lib_spin($args) {
+		list($color, $delta) = $this->colorArgs($args);
+
+		$hsl = $this->toHSL($color);
+
+		$hsl[1] = $hsl[1] + $delta % 360;
+		if ($hsl[1] < 0) $hsl[1] += 360;
+
+		return $this->toRGB($hsl);
+	}
+
+	protected function lib_fadeout($args) {
+		list($color, $delta) = $this->colorArgs($args);
+		$color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) - $delta/100);
+		return $color;
+	}
+
+	protected function lib_fadein($args) {
+		list($color, $delta) = $this->colorArgs($args);
+		$color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) + $delta/100);
+		return $color;
+	}
+
+	protected function lib_hue($color) {
+		$hsl = $this->toHSL($this->assertColor($color));
+		return round($hsl[1]);
+	}
+
+	protected function lib_saturation($color) {
+		$hsl = $this->toHSL($this->assertColor($color));
+		return round($hsl[2]);
+	}
+
+	protected function lib_lightness($color) {
+		$hsl = $this->toHSL($this->assertColor($color));
+		return round($hsl[3]);
+	}
+
+	// get the alpha of a color
+	// defaults to 1 for non-colors or colors without an alpha
+	protected function lib_alpha($value) {
+		if (!is_null($color = $this->coerceColor($value))) {
+			return isset($color[4]) ? $color[4] : 1;
+		}
+	}
+
+	// set the alpha of the color
+	protected function lib_fade($args) {
+		list($color, $alpha) = $this->colorArgs($args);
+		$color[4] = $this->clamp($alpha / 100.0);
+		return $color;
+	}
+
+	protected function lib_percentage($arg) {
+		$num = $this->assertNumber($arg);
+		return array("number", $num*100, "%");
+	}
+
+	// mixes two colors by weight
+	// mix(@color1, @color2, [@weight: 50%]);
+	// http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method
+	protected function lib_mix($args) {
+		if ($args[0] != "list" || count($args[2]) < 2)
+			$this->throwError("mix expects (color1, color2, weight)");
+
+		list($first, $second) = $args[2];
+		$first = $this->assertColor($first);
+		$second = $this->assertColor($second);
+
+		$first_a = $this->lib_alpha($first);
+		$second_a = $this->lib_alpha($second);
+
+		if (isset($args[2][2])) {
+			$weight = $args[2][2][1] / 100.0;
+		} else {
+			$weight = 0.5;
+		}
+
+		$w = $weight * 2 - 1;
+		$a = $first_a - $second_a;
+
+		$w1 = (($w * $a == -1 ? $w : ($w + $a)/(1 + $w * $a)) + 1) / 2.0;
+		$w2 = 1.0 - $w1;
+
+		$new = array('color',
+			$w1 * $first[1] + $w2 * $second[1],
+			$w1 * $first[2] + $w2 * $second[2],
+			$w1 * $first[3] + $w2 * $second[3],
+		);
+
+		if ($first_a != 1.0 || $second_a != 1.0) {
+			$new[] = $first_a * $weight + $second_a * ($weight - 1);
+		}
+
+		return $this->fixColor($new);
+	}
+
+	protected function lib_contrast($args) {
+	    $darkColor  = array('color', 0, 0, 0);
+	    $lightColor = array('color', 255, 255, 255);
+	    $threshold  = 0.43;
+
+	    if ( $args[0] == 'list' ) {
+	        $inputColor = ( isset($args[2][0]) ) ? $this->assertColor($args[2][0])  : $lightColor;
+	        $darkColor  = ( isset($args[2][1]) ) ? $this->assertColor($args[2][1])  : $darkColor;
+	        $lightColor = ( isset($args[2][2]) ) ? $this->assertColor($args[2][2])  : $lightColor;
+	        $threshold  = ( isset($args[2][3]) ) ? $this->assertNumber($args[2][3]) : $threshold;
+	    }
+	    else {
+	        $inputColor  = $this->assertColor($args);
+	    }
+
+	    $inputColor = $this->coerceColor($inputColor);
+	    $darkColor  = $this->coerceColor($darkColor);
+	    $lightColor = $this->coerceColor($lightColor);
+
+	    //Figure out which is actually light and dark!
+	    if ( $this->lib_luma($darkColor) > $this->lib_luma($lightColor) ) {
+	        $t  = $lightColor;
+	        $lightColor = $darkColor;
+	        $darkColor  = $t;
+	    }
+
+	    $inputColor_alpha = $this->lib_alpha($inputColor);
+	    if ( ( $this->lib_luma($inputColor) * $inputColor_alpha) < $threshold) {
+	        return $lightColor;
+	    }
+	    return $darkColor;
+	}
+
+	protected function lib_luma($color) {
+	    $color = $this->coerceColor($color);
+	    return (0.2126 * $color[0] / 255) + (0.7152 * $color[1] / 255) + (0.0722 * $color[2] / 255);
+	}
+
+
+	public function assertColor($value, $error = "expected color value") {
+		$color = $this->coerceColor($value);
+		if (is_null($color)) $this->throwError($error);
+		return $color;
+	}
+
+	public function assertNumber($value, $error = "expecting number") {
+		if ($value[0] == "number") return $value[1];
+		$this->throwError($error);
+	}
+
+	public function assertArgs($value, $expectedArgs, $name="") {
+		if ($expectedArgs == 1) {
+			return $value;
+		} else {
+			if ($value[0] !== "list" || $value[1] != ",") $this->throwError("expecting list");
+			$values = $value[2];
+			$numValues = count($values);
+			if ($expectedArgs != $numValues) {
+				if ($name) {
+					$name = $name . ": ";
+				}
+
+				$this->throwError("${name}expecting $expectedArgs arguments, got $numValues");
+			}
+
+			return $values;
+		}
+	}
+
+	protected function toHSL($color) {
+		if ($color[0] == 'hsl') return $color;
+
+		$r = $color[1] / 255;
+		$g = $color[2] / 255;
+		$b = $color[3] / 255;
+
+		$min = min($r, $g, $b);
+		$max = max($r, $g, $b);
+
+		$L = ($min + $max) / 2;
+		if ($min == $max) {
+			$S = $H = 0;
+		} else {
+			if ($L < 0.5)
+				$S = ($max - $min)/($max + $min);
+			else
+				$S = ($max - $min)/(2.0 - $max - $min);
+
+			if ($r == $max) $H = ($g - $b)/($max - $min);
+			elseif ($g == $max) $H = 2.0 + ($b - $r)/($max - $min);
+			elseif ($b == $max) $H = 4.0 + ($r - $g)/($max - $min);
+
+		}
+
+		$out = array('hsl',
+			($H < 0 ? $H + 6 : $H)*60,
+			$S*100,
+			$L*100,
+		);
+
+		if (count($color) > 4) $out[] = $color[4]; // copy alpha
+		return $out;
+	}
+
+	protected function toRGB_helper($comp, $temp1, $temp2) {
+		if ($comp < 0) $comp += 1.0;
+		elseif ($comp > 1) $comp -= 1.0;
+
+		if (6 * $comp < 1) return $temp1 + ($temp2 - $temp1) * 6 * $comp;
+		if (2 * $comp < 1) return $temp2;
+		if (3 * $comp < 2) return $temp1 + ($temp2 - $temp1)*((2/3) - $comp) * 6;
+
+		return $temp1;
+	}
+
+	/**
+	 * Converts a hsl array into a color value in rgb.
+	 * Expects H to be in range of 0 to 360, S and L in 0 to 100
+	 */
+	protected function toRGB($color) {
+		if ($color[0] == 'color') return $color;
+
+		$H = $color[1] / 360;
+		$S = $color[2] / 100;
+		$L = $color[3] / 100;
+
+		if ($S == 0) {
+			$r = $g = $b = $L;
+		} else {
+			$temp2 = $L < 0.5 ?
+				$L*(1.0 + $S) :
+				$L + $S - $L * $S;
+
+			$temp1 = 2.0 * $L - $temp2;
+
+			$r = $this->toRGB_helper($H + 1/3, $temp1, $temp2);
+			$g = $this->toRGB_helper($H, $temp1, $temp2);
+			$b = $this->toRGB_helper($H - 1/3, $temp1, $temp2);
+		}
+
+		// $out = array('color', round($r*255), round($g*255), round($b*255));
+		$out = array('color', $r*255, $g*255, $b*255);
+		if (count($color) > 4) $out[] = $color[4]; // copy alpha
+		return $out;
+	}
+
+	protected function clamp($v, $max = 1, $min = 0) {
+		return min($max, max($min, $v));
+	}
+
+	/**
+	 * Convert the rgb, rgba, hsl color literals of function type
+	 * as returned by the parser into values of color type.
+	 */
+	protected function funcToColor($func) {
+		$fname = $func[1];
+		if ($func[2][0] != 'list') return false; // need a list of arguments
+		$rawComponents = $func[2][2];
+
+		if ($fname == 'hsl' || $fname == 'hsla') {
+			$hsl = array('hsl');
+			$i = 0;
+			foreach ($rawComponents as $c) {
+				$val = $this->reduce($c);
+				$val = isset($val[1]) ? floatval($val[1]) : 0;
+
+				if ($i == 0) $clamp = 360;
+				elseif ($i < 3) $clamp = 100;
+				else $clamp = 1;
+
+				$hsl[] = $this->clamp($val, $clamp);
+				$i++;
+			}
+
+			while (count($hsl) < 4) $hsl[] = 0;
+			return $this->toRGB($hsl);
+
+		} elseif ($fname == 'rgb' || $fname == 'rgba') {
+			$components = array();
+			$i = 1;
+			foreach	($rawComponents as $c) {
+				$c = $this->reduce($c);
+				if ($i < 4) {
+					if ($c[0] == "number" && $c[2] == "%") {
+						$components[] = 255 * ($c[1] / 100);
+					} else {
+						$components[] = floatval($c[1]);
+					}
+				} elseif ($i == 4) {
+					if ($c[0] == "number" && $c[2] == "%") {
+						$components[] = 1.0 * ($c[1] / 100);
+					} else {
+						$components[] = floatval($c[1]);
+					}
+				} else break;
+
+				$i++;
+			}
+			while (count($components) < 3) $components[] = 0;
+			array_unshift($components, 'color');
+			return $this->fixColor($components);
+		}
+
+		return false;
+	}
+
+	protected function reduce($value, $forExpression = false) {
+		switch ($value[0]) {
+		case "interpolate":
+			$reduced = $this->reduce($value[1]);
+			$var = $this->compileValue($reduced);
+			$res = $this->reduce(array("variable", $this->vPrefix . $var));
+
+			if ($res[0] == "raw_color") {
+				$res = $this->coerceColor($res);
+			}
+
+			if (empty($value[2])) $res = $this->lib_e($res);
+
+			return $res;
+		case "variable":
+			$key = $value[1];
+			if (is_array($key)) {
+				$key = $this->reduce($key);
+				$key = $this->vPrefix . $this->compileValue($this->lib_e($key));
+			}
+
+			$seen =& $this->env->seenNames;
+
+			if (!empty($seen[$key])) {
+				$this->throwError("infinite loop detected: $key");
+			}
+
+			$seen[$key] = true;
+			$out = $this->reduce($this->get($key));
+			$seen[$key] = false;
+			return $out;
+		case "list":
+			foreach ($value[2] as &$item) {
+				$item = $this->reduce($item, $forExpression);
+			}
+			return $value;
+		case "expression":
+			return $this->evaluate($value);
+		case "string":
+			foreach ($value[2] as &$part) {
+				if (is_array($part)) {
+					$strip = $part[0] == "variable";
+					$part = $this->reduce($part);
+					if ($strip) $part = $this->lib_e($part);
+				}
+			}
+			return $value;
+		case "escape":
+			list(,$inner) = $value;
+			return $this->lib_e($this->reduce($inner));
+		case "function":
+			$color = $this->funcToColor($value);
+			if ($color) return $color;
+
+			list(, $name, $args) = $value;
+			if ($name == "%") $name = "_sprintf";
+
+			$f = isset($this->libFunctions[$name]) ?
+				$this->libFunctions[$name] : array($this, 'lib_'.str_replace('-', '_', $name));
+
+			if (is_callable($f)) {
+				if ($args[0] == 'list')
+					$args = self::compressList($args[2], $args[1]);
+
+				$ret = call_user_func($f, $this->reduce($args, true), $this);
+
+				if (is_null($ret)) {
+					return array("string", "", array(
+						$name, "(", $args, ")"
+					));
+				}
+
+				// convert to a typed value if the result is a php primitive
+				if (is_numeric($ret)) $ret = array('number', $ret, "");
+				elseif (!is_array($ret)) $ret = array('keyword', $ret);
+
+				return $ret;
+			}
+
+			// plain function, reduce args
+			$value[2] = $this->reduce($value[2]);
+			return $value;
+		case "unary":
+			list(, $op, $exp) = $value;
+			$exp = $this->reduce($exp);
+
+			if ($exp[0] == "number") {
+				switch ($op) {
+				case "+":
+					return $exp;
+				case "-":
+					$exp[1] *= -1;
+					return $exp;
+				}
+			}
+			return array("string", "", array($op, $exp));
+		}
+
+		if ($forExpression) {
+			switch ($value[0]) {
+			case "keyword":
+				if ($color = $this->coerceColor($value)) {
+					return $color;
+				}
+				break;
+			case "raw_color":
+				return $this->coerceColor($value);
+			}
+		}
+
+		return $value;
+	}
+
+
+	// coerce a value for use in color operation
+	protected function coerceColor($value) {
+		switch($value[0]) {
+			case 'color': return $value;
+			case 'raw_color':
+				$c = array("color", 0, 0, 0);
+				$colorStr = substr($value[1], 1);
+				$num = hexdec($colorStr);
+				$width = strlen($colorStr) == 3 ? 16 : 256;
+
+				for ($i = 3; $i > 0; $i--) { // 3 2 1
+					$t = $num % $width;
+					$num /= $width;
+
+					$c[$i] = $t * (256/$width) + $t * floor(16/$width);
+				}
+
+				return $c;
+			case 'keyword':
+				$name = $value[1];
+				if (isset(self::$cssColors[$name])) {
+					$rgba = explode(',', self::$cssColors[$name]);
+
+					if(isset($rgba[3]))
+						return array('color', $rgba[0], $rgba[1], $rgba[2], $rgba[3]);
+
+					return array('color', $rgba[0], $rgba[1], $rgba[2]);
+				}
+				return null;
+		}
+	}
+
+	// make something string like into a string
+	protected function coerceString($value) {
+		switch ($value[0]) {
+		case "string":
+			return $value;
+		case "keyword":
+			return array("string", "", array($value[1]));
+		}
+		return null;
+	}
+
+	// turn list of length 1 into value type
+	protected function flattenList($value) {
+		if ($value[0] == "list" && count($value[2]) == 1) {
+			return $this->flattenList($value[2][0]);
+		}
+		return $value;
+	}
+
+	public function toBool($a) {
+		if ($a) return self::$TRUE;
+		else return self::$FALSE;
+	}
+
+	// evaluate an expression
+	protected function evaluate($exp) {
+		list(, $op, $left, $right, $whiteBefore, $whiteAfter) = $exp;
+
+		$left = $this->reduce($left, true);
+		$right = $this->reduce($right, true);
+
+		if ($leftColor = $this->coerceColor($left)) {
+			$left = $leftColor;
+		}
+
+		if ($rightColor = $this->coerceColor($right)) {
+			$right = $rightColor;
+		}
+
+		$ltype = $left[0];
+		$rtype = $right[0];
+
+		// operators that work on all types
+		if ($op == "and") {
+			return $this->toBool($left == self::$TRUE && $right == self::$TRUE);
+		}
+
+		if ($op == "=") {
+			return $this->toBool($this->eq($left, $right) );
+		}
+
+		if ($op == "+" && !is_null($str = $this->stringConcatenate($left, $right))) {
+			return $str;
+		}
+
+		// type based operators
+		$fname = "op_${ltype}_${rtype}";
+		if (is_callable(array($this, $fname))) {
+			$out = $this->$fname($op, $left, $right);
+			if (!is_null($out)) return $out;
+		}
+
+		// make the expression look it did before being parsed
+		$paddedOp = $op;
+		if ($whiteBefore) $paddedOp = " " . $paddedOp;
+		if ($whiteAfter) $paddedOp .= " ";
+
+		return array("string", "", array($left, $paddedOp, $right));
+	}
+
+	protected function stringConcatenate($left, $right) {
+		if ($strLeft = $this->coerceString($left)) {
+			if ($right[0] == "string") {
+				$right[1] = "";
+			}
+			$strLeft[2][] = $right;
+			return $strLeft;
+		}
+
+		if ($strRight = $this->coerceString($right)) {
+			array_unshift($strRight[2], $left);
+			return $strRight;
+		}
+	}
+
+
+	// make sure a color's components don't go out of bounds
+	protected function fixColor($c) {
+		foreach (range(1, 3) as $i) {
+			if ($c[$i] < 0) $c[$i] = 0;
+			if ($c[$i] > 255) $c[$i] = 255;
+		}
+
+		return $c;
+	}
+
+	protected function op_number_color($op, $lft, $rgt) {
+		if ($op == '+' || $op == '*') {
+			return $this->op_color_number($op, $rgt, $lft);
+		}
+	}
+
+	protected function op_color_number($op, $lft, $rgt) {
+		if ($rgt[0] == '%') $rgt[1] /= 100;
+
+		return $this->op_color_color($op, $lft,
+			array_fill(1, count($lft) - 1, $rgt[1]));
+	}
+
+	protected function op_color_color($op, $left, $right) {
+		$out = array('color');
+		$max = count($left) > count($right) ? count($left) : count($right);
+		foreach (range(1, $max - 1) as $i) {
+			$lval = isset($left[$i]) ? $left[$i] : 0;
+			$rval = isset($right[$i]) ? $right[$i] : 0;
+			switch ($op) {
+			case '+':
+				$out[] = $lval + $rval;
+				break;
+			case '-':
+				$out[] = $lval - $rval;
+				break;
+			case '*':
+				$out[] = $lval * $rval;
+				break;
+			case '%':
+				$out[] = $lval % $rval;
+				break;
+			case '/':
+				if ($rval == 0) $this->throwError("evaluate error: can't divide by zero");
+				$out[] = $lval / $rval;
+				break;
+			default:
+				$this->throwError('evaluate error: color op number failed on op '.$op);
+			}
+		}
+		return $this->fixColor($out);
+	}
+
+	function lib_red($color){
+		$color = $this->coerceColor($color);
+		if (is_null($color)) {
+			$this->throwError('color expected for red()');
+		}
+
+		return $color[1];
+	}
+
+	function lib_green($color){
+		$color = $this->coerceColor($color);
+		if (is_null($color)) {
+			$this->throwError('color expected for green()');
+		}
+
+		return $color[2];
+	}
+
+	function lib_blue($color){
+		$color = $this->coerceColor($color);
+		if (is_null($color)) {
+			$this->throwError('color expected for blue()');
+		}
+
+		return $color[3];
+	}
+
+
+	// operator on two numbers
+	protected function op_number_number($op, $left, $right) {
+		$unit = empty($left[2]) ? $right[2] : $left[2];
+
+		$value = 0;
+		switch ($op) {
+		case '+':
+			$value = $left[1] + $right[1];
+			break;
+		case '*':
+			$value = $left[1] * $right[1];
+			break;
+		case '-':
+			$value = $left[1] - $right[1];
+			break;
+		case '%':
+			$value = $left[1] % $right[1];
+			break;
+		case '/':
+			if ($right[1] == 0) $this->throwError('parse error: divide by zero');
+			$value = $left[1] / $right[1];
+			break;
+		case '<':
+			return $this->toBool($left[1] < $right[1]);
+		case '>':
+			return $this->toBool($left[1] > $right[1]);
+		case '>=':
+			return $this->toBool($left[1] >= $right[1]);
+		case '=<':
+			return $this->toBool($left[1] <= $right[1]);
+		default:
+			$this->throwError('parse error: unknown number operator: '.$op);
+		}
+
+		return array("number", $value, $unit);
+	}
+
+
+	/* environment functions */
+
+	protected function makeOutputBlock($type, $selectors = null) {
+		$b = new stdclass;
+		$b->lines = array();
+		$b->children = array();
+		$b->selectors = $selectors;
+		$b->type = $type;
+		$b->parent = $this->scope;
+		return $b;
+	}
+
+	// the state of execution
+	protected function pushEnv($block = null) {
+		$e = new stdclass;
+		$e->parent = $this->env;
+		$e->store = array();
+		$e->block = $block;
+
+		$this->env = $e;
+		return $e;
+	}
+
+	// pop something off the stack
+	protected function popEnv() {
+		$old = $this->env;
+		$this->env = $this->env->parent;
+		return $old;
+	}
+
+	// set something in the current env
+	protected function set($name, $value) {
+		$this->env->store[$name] = $value;
+	}
+
+
+	// get the highest occurrence entry for a name
+	protected function get($name) {
+		$current = $this->env;
+
+		$isArguments = $name == $this->vPrefix . 'arguments';
+		while ($current) {
+			if ($isArguments && isset($current->arguments)) {
+				return array('list', ' ', $current->arguments);
+			}
+
+			if (isset($current->store[$name]))
+				return $current->store[$name];
+			else {
+				$current = isset($current->storeParent) ?
+					$current->storeParent : $current->parent;
+			}
+		}
+
+		$this->throwError("variable $name is undefined");
+	}
+
+	// inject array of unparsed strings into environment as variables
+	protected function injectVariables($args) {
+		$this->pushEnv();
+		$parser = new lessc_parser($this, __METHOD__);
+		foreach ($args as $name => $strValue) {
+			if ($name{0} != '@') $name = '@'.$name;
+			$parser->count = 0;
+			$parser->buffer = (string)$strValue;
+			if (!$parser->propertyValue($value)) {
+				throw new Exception("failed to parse passed in variable $name: $strValue");
+			}
+
+			$this->set($name, $value);
+		}
+	}
+
+	/**
+	 * Initialize any static state, can initialize parser for a file
+	 * $opts isn't used yet
+	 */
+	public function __construct($fname = null) {
+		if ($fname !== null) {
+			// used for deprecated parse method
+			$this->_parseFile = $fname;
+		}
+	}
+
+	public function compile($string, $name = null) {
+		$locale = setlocale(LC_NUMERIC, 0);
+		setlocale(LC_NUMERIC, "C");
+
+		$this->parser = $this->makeParser($name);
+		$root = $this->parser->parse($string);
+
+		$this->env = null;
+		$this->scope = null;
+
+		$this->formatter = $this->newFormatter();
+
+		if (!empty($this->registeredVars)) {
+			$this->injectVariables($this->registeredVars);
+		}
+
+		$this->sourceParser = $this->parser; // used for error messages
+		$this->compileBlock($root);
+
+		ob_start();
+		$this->formatter->block($this->scope);
+		$out = ob_get_clean();
+		setlocale(LC_NUMERIC, $locale);
+		return $out;
+	}
+
+	public function compileFile($fname, $outFname = null) {
+		if (!is_readable($fname)) {
+			throw new Exception('load error: failed to find '.$fname);
+		}
+
+		$pi = pathinfo($fname);
+
+		$oldImport = $this->importDir;
+
+		$this->importDir = (array)$this->importDir;
+		$this->importDir[] = $pi['dirname'].'/';
+
+		$this->addParsedFile($fname);
+
+		$out = $this->compile(file_get_contents($fname), $fname);
+
+		$this->importDir = $oldImport;
+
+		if ($outFname !== null) {
+			return file_put_contents($outFname, $out);
+		}
+
+		return $out;
+	}
+
+	// compile only if changed input has changed or output doesn't exist
+	public function checkedCompile($in, $out) {
+		if (!is_file($out) || filemtime($in) > filemtime($out)) {
+			$this->compileFile($in, $out);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Execute lessphp on a .less file or a lessphp cache structure
+	 *
+	 * The lessphp cache structure contains information about a specific
+	 * less file having been parsed. It can be used as a hint for future
+	 * calls to determine whether or not a rebuild is required.
+	 *
+	 * The cache structure contains two important keys that may be used
+	 * externally:
+	 *
+	 * compiled: The final compiled CSS
+	 * updated: The time (in seconds) the CSS was last compiled
+	 *
+	 * The cache structure is a plain-ol' PHP associative array and can
+	 * be serialized and unserialized without a hitch.
+	 *
+	 * @param mixed $in Input
+	 * @param bool $force Force rebuild?
+	 * @return array lessphp cache structure
+	 */
+	public function cachedCompile($in, $force = false) {
+		// assume no root
+		$root = null;
+
+		if (is_string($in)) {
+			$root = $in;
+		} elseif (is_array($in) and isset($in['root'])) {
+			if ($force or ! isset($in['files'])) {
+				// If we are forcing a recompile or if for some reason the
+				// structure does not contain any file information we should
+				// specify the root to trigger a rebuild.
+				$root = $in['root'];
+			} elseif (isset($in['files']) and is_array($in['files'])) {
+				foreach ($in['files'] as $fname => $ftime ) {
+					if (!file_exists($fname) or filemtime($fname) > $ftime) {
+						// One of the files we knew about previously has changed
+						// so we should look at our incoming root again.
+						$root = $in['root'];
+						break;
+					}
+				}
+			}
+		} else {
+			// TODO: Throw an exception? We got neither a string nor something
+			// that looks like a compatible lessphp cache structure.
+			return null;
+		}
+
+		if ($root !== null) {
+			// If we have a root value which means we should rebuild.
+			$out = array();
+			$out['root'] = $root;
+			$out['compiled'] = $this->compileFile($root);
+			$out['files'] = $this->allParsedFiles();
+			$out['updated'] = time();
+			return $out;
+		} else {
+			// No changes, pass back the structure
+			// we were given initially.
+			return $in;
+		}
+
+	}
+
+	// parse and compile buffer
+	// This is deprecated
+	public function parse($str = null, $initialVariables = null) {
+		if (is_array($str)) {
+			$initialVariables = $str;
+			$str = null;
+		}
+
+		$oldVars = $this->registeredVars;
+		if ($initialVariables !== null) {
+			$this->setVariables($initialVariables);
+		}
+
+		if ($str == null) {
+			if (empty($this->_parseFile)) {
+				throw new exception("nothing to parse");
+			}
+
+			$out = $this->compileFile($this->_parseFile);
+		} else {
+			$out = $this->compile($str);
+		}
+
+		$this->registeredVars = $oldVars;
+		return $out;
+	}
+
+	protected function makeParser($name) {
+		$parser = new lessc_parser($this, $name);
+		$parser->writeComments = $this->preserveComments;
+
+		return $parser;
+	}
+
+	public function setFormatter($name) {
+		$this->formatterName = $name;
+	}
+
+	protected function newFormatter() {
+		$className = "lessc_formatter_lessjs";
+		if (!empty($this->formatterName)) {
+			if (!is_string($this->formatterName))
+				return $this->formatterName;
+			$className = "lessc_formatter_$this->formatterName";
+		}
+
+		return new $className;
+	}
+
+	public function setPreserveComments($preserve) {
+		$this->preserveComments = $preserve;
+	}
+
+	public function registerFunction($name, $func) {
+		$this->libFunctions[$name] = $func;
+	}
+
+	public function unregisterFunction($name) {
+		unset($this->libFunctions[$name]);
+	}
+
+	public function setVariables($variables) {
+		$this->registeredVars = array_merge($this->registeredVars, $variables);
+	}
+
+	public function unsetVariable($name) {
+		unset($this->registeredVars[$name]);
+	}
+
+	public function setImportDir($dirs) {
+		$this->importDir = (array)$dirs;
+	}
+
+	public function addImportDir($dir) {
+		$this->importDir = (array)$this->importDir;
+		$this->importDir[] = $dir;
+	}
+
+	public function allParsedFiles() {
+		return $this->allParsedFiles;
+	}
+
+	public function addParsedFile($file) {
+		$this->allParsedFiles[realpath($file)] = filemtime($file);
+	}
+
+	/**
+	 * Uses the current value of $this->count to show line and line number
+	 */
+	public function throwError($msg = null) {
+		if ($this->sourceLoc >= 0) {
+			$this->sourceParser->throwError($msg, $this->sourceLoc);
+		}
+		throw new exception($msg);
+	}
+
+	// compile file $in to file $out if $in is newer than $out
+	// returns true when it compiles, false otherwise
+	public static function ccompile($in, $out, $less = null) {
+		if ($less === null) {
+			$less = new self;
+		}
+		return $less->checkedCompile($in, $out);
+	}
+
+	public static function cexecute($in, $force = false, $less = null) {
+		if ($less === null) {
+			$less = new self;
+		}
+		return $less->cachedCompile($in, $force);
+	}
+
+	static protected $cssColors = array(
+		'aliceblue' => '240,248,255',
+		'antiquewhite' => '250,235,215',
+		'aqua' => '0,255,255',
+		'aquamarine' => '127,255,212',
+		'azure' => '240,255,255',
+		'beige' => '245,245,220',
+		'bisque' => '255,228,196',
+		'black' => '0,0,0',
+		'blanchedalmond' => '255,235,205',
+		'blue' => '0,0,255',
+		'blueviolet' => '138,43,226',
+		'brown' => '165,42,42',
+		'burlywood' => '222,184,135',
+		'cadetblue' => '95,158,160',
+		'chartreuse' => '127,255,0',
+		'chocolate' => '210,105,30',
+		'coral' => '255,127,80',
+		'cornflowerblue' => '100,149,237',
+		'cornsilk' => '255,248,220',
+		'crimson' => '220,20,60',
+		'cyan' => '0,255,255',
+		'darkblue' => '0,0,139',
+		'darkcyan' => '0,139,139',
+		'darkgoldenrod' => '184,134,11',
+		'darkgray' => '169,169,169',
+		'darkgreen' => '0,100,0',
+		'darkgrey' => '169,169,169',
+		'darkkhaki' => '189,183,107',
+		'darkmagenta' => '139,0,139',
+		'darkolivegreen' => '85,107,47',
+		'darkorange' => '255,140,0',
+		'darkorchid' => '153,50,204',
+		'darkred' => '139,0,0',
+		'darksalmon' => '233,150,122',
+		'darkseagreen' => '143,188,143',
+		'darkslateblue' => '72,61,139',
+		'darkslategray' => '47,79,79',
+		'darkslategrey' => '47,79,79',
+		'darkturquoise' => '0,206,209',
+		'darkviolet' => '148,0,211',
+		'deeppink' => '255,20,147',
+		'deepskyblue' => '0,191,255',
+		'dimgray' => '105,105,105',
+		'dimgrey' => '105,105,105',
+		'dodgerblue' => '30,144,255',
+		'firebrick' => '178,34,34',
+		'floralwhite' => '255,250,240',
+		'forestgreen' => '34,139,34',
+		'fuchsia' => '255,0,255',
+		'gainsboro' => '220,220,220',
+		'ghostwhite' => '248,248,255',
+		'gold' => '255,215,0',
+		'goldenrod' => '218,165,32',
+		'gray' => '128,128,128',
+		'green' => '0,128,0',
+		'greenyellow' => '173,255,47',
+		'grey' => '128,128,128',
+		'honeydew' => '240,255,240',
+		'hotpink' => '255,105,180',
+		'indianred' => '205,92,92',
+		'indigo' => '75,0,130',
+		'ivory' => '255,255,240',
+		'khaki' => '240,230,140',
+		'lavender' => '230,230,250',
+		'lavenderblush' => '255,240,245',
+		'lawngreen' => '124,252,0',
+		'lemonchiffon' => '255,250,205',
+		'lightblue' => '173,216,230',
+		'lightcoral' => '240,128,128',
+		'lightcyan' => '224,255,255',
+		'lightgoldenrodyellow' => '250,250,210',
+		'lightgray' => '211,211,211',
+		'lightgreen' => '144,238,144',
+		'lightgrey' => '211,211,211',
+		'lightpink' => '255,182,193',
+		'lightsalmon' => '255,160,122',
+		'lightseagreen' => '32,178,170',
+		'lightskyblue' => '135,206,250',
+		'lightslategray' => '119,136,153',
+		'lightslategrey' => '119,136,153',
+		'lightsteelblue' => '176,196,222',
+		'lightyellow' => '255,255,224',
+		'lime' => '0,255,0',
+		'limegreen' => '50,205,50',
+		'linen' => '250,240,230',
+		'magenta' => '255,0,255',
+		'maroon' => '128,0,0',
+		'mediumaquamarine' => '102,205,170',
+		'mediumblue' => '0,0,205',
+		'mediumorchid' => '186,85,211',
+		'mediumpurple' => '147,112,219',
+		'mediumseagreen' => '60,179,113',
+		'mediumslateblue' => '123,104,238',
+		'mediumspringgreen' => '0,250,154',
+		'mediumturquoise' => '72,209,204',
+		'mediumvioletred' => '199,21,133',
+		'midnightblue' => '25,25,112',
+		'mintcream' => '245,255,250',
+		'mistyrose' => '255,228,225',
+		'moccasin' => '255,228,181',
+		'navajowhite' => '255,222,173',
+		'navy' => '0,0,128',
+		'oldlace' => '253,245,230',
+		'olive' => '128,128,0',
+		'olivedrab' => '107,142,35',
+		'orange' => '255,165,0',
+		'orangered' => '255,69,0',
+		'orchid' => '218,112,214',
+		'palegoldenrod' => '238,232,170',
+		'palegreen' => '152,251,152',
+		'paleturquoise' => '175,238,238',
+		'palevioletred' => '219,112,147',
+		'papayawhip' => '255,239,213',
+		'peachpuff' => '255,218,185',
+		'peru' => '205,133,63',
+		'pink' => '255,192,203',
+		'plum' => '221,160,221',
+		'powderblue' => '176,224,230',
+		'purple' => '128,0,128',
+		'red' => '255,0,0',
+		'rosybrown' => '188,143,143',
+		'royalblue' => '65,105,225',
+		'saddlebrown' => '139,69,19',
+		'salmon' => '250,128,114',
+		'sandybrown' => '244,164,96',
+		'seagreen' => '46,139,87',
+		'seashell' => '255,245,238',
+		'sienna' => '160,82,45',
+		'silver' => '192,192,192',
+		'skyblue' => '135,206,235',
+		'slateblue' => '106,90,205',
+		'slategray' => '112,128,144',
+		'slategrey' => '112,128,144',
+		'snow' => '255,250,250',
+		'springgreen' => '0,255,127',
+		'steelblue' => '70,130,180',
+		'tan' => '210,180,140',
+		'teal' => '0,128,128',
+		'thistle' => '216,191,216',
+		'tomato' => '255,99,71',
+		'transparent' => '0,0,0,0',
+		'turquoise' => '64,224,208',
+		'violet' => '238,130,238',
+		'wheat' => '245,222,179',
+		'white' => '255,255,255',
+		'whitesmoke' => '245,245,245',
+		'yellow' => '255,255,0',
+		'yellowgreen' => '154,205,50'
+	);
+}
+
+// responsible for taking a string of LESS code and converting it into a
+// syntax tree
+class lessc_parser {
+	static protected $nextBlockId = 0; // used to uniquely identify blocks
+
+	static protected $precedence = array(
+		'=<' => 0,
+		'>=' => 0,
+		'=' => 0,
+		'<' => 0,
+		'>' => 0,
+
+		'+' => 1,
+		'-' => 1,
+		'*' => 2,
+		'/' => 2,
+		'%' => 2,
+	);
+
+	static protected $whitePattern;
+	static protected $commentMulti;
+
+	static protected $commentSingle = "//";
+	static protected $commentMultiLeft = "/*";
+	static protected $commentMultiRight = "*/";
+
+	// regex string to match any of the operators
+	static protected $operatorString;
+
+	// these properties will supress division unless it's inside parenthases
+	static protected $supressDivisionProps =
+		array('/border-radius$/i', '/^font$/i');
+
+	protected $blockDirectives = array("font-face", "keyframes", "page", "-moz-document", "viewport", "-moz-viewport", "-o-viewport", "-ms-viewport");
+	protected $lineDirectives = array("charset");
+
+	/**
+	 * if we are in parens we can be more liberal with whitespace around
+	 * operators because it must evaluate to a single value and thus is less
+	 * ambiguous.
+	 *
+	 * Consider:
+	 *     property1: 10 -5; // is two numbers, 10 and -5
+	 *     property2: (10 -5); // should evaluate to 5
+	 */
+	protected $inParens = false;
+
+	// caches preg escaped literals
+	static protected $literalCache = array();
+
+	public function __construct($lessc, $sourceName = null) {
+		$this->eatWhiteDefault = true;
+		// reference to less needed for vPrefix, mPrefix, and parentSelector
+		$this->lessc = $lessc;
+
+		$this->sourceName = $sourceName; // name used for error messages
+
+		$this->writeComments = false;
+
+		if (!self::$operatorString) {
+			self::$operatorString =
+				'('.implode('|', array_map(array('lessc', 'preg_quote'),
+					array_keys(self::$precedence))).')';
+
+			$commentSingle = lessc::preg_quote(self::$commentSingle);
+			$commentMultiLeft = lessc::preg_quote(self::$commentMultiLeft);
+			$commentMultiRight = lessc::preg_quote(self::$commentMultiRight);
+
+			self::$commentMulti = $commentMultiLeft.'.*?'.$commentMultiRight;
+			self::$whitePattern = '/'.$commentSingle.'[^\n]*\s*|('.self::$commentMulti.')\s*|\s+/Ais';
+		}
+	}
+
+	public function parse($buffer) {
+		$this->count = 0;
+		$this->line = 1;
+
+		$this->env = null; // block stack
+		$this->buffer = $this->writeComments ? $buffer : $this->removeComments($buffer);
+		$this->pushSpecialBlock("root");
+		$this->eatWhiteDefault = true;
+		$this->seenComments = array();
+
+		// trim whitespace on head
+		// if (preg_match('/^\s+/', $this->buffer, $m)) {
+		// 	$this->line += substr_count($m[0], "\n");
+		// 	$this->buffer = ltrim($this->buffer);
+		// }
+		$this->whitespace();
+
+		// parse the entire file
+		while (false !== $this->parseChunk());
+
+		if ($this->count != strlen($this->buffer))
+			$this->throwError();
+
+		// TODO report where the block was opened
+		if ( !property_exists($this->env, 'parent') || !is_null($this->env->parent) )
+			throw new exception('parse error: unclosed block');
+
+		return $this->env;
+	}
+
+	/**
+	 * Parse a single chunk off the head of the buffer and append it to the
+	 * current parse environment.
+	 * Returns false when the buffer is empty, or when there is an error.
+	 *
+	 * This function is called repeatedly until the entire document is
+	 * parsed.
+	 *
+	 * This parser is most similar to a recursive descent parser. Single
+	 * functions represent discrete grammatical rules for the language, and
+	 * they are able to capture the text that represents those rules.
+	 *
+	 * Consider the function lessc::keyword(). (all parse functions are
+	 * structured the same)
+	 *
+	 * The function takes a single reference argument. When calling the
+	 * function it will attempt to match a keyword on the head of the buffer.
+	 * If it is successful, it will place the keyword in the referenced
+	 * argument, advance the position in the buffer, and return true. If it
+	 * fails then it won't advance the buffer and it will return false.
+	 *
+	 * All of these parse functions are powered by lessc::match(), which behaves
+	 * the same way, but takes a literal regular expression. Sometimes it is
+	 * more convenient to use match instead of creating a new function.
+	 *
+	 * Because of the format of the functions, to parse an entire string of
+	 * grammatical rules, you can chain them together using &&.
+	 *
+	 * But, if some of the rules in the chain succeed before one fails, then
+	 * the buffer position will be left at an invalid state. In order to
+	 * avoid this, lessc::seek() is used to remember and set buffer positions.
+	 *
+	 * Before parsing a chain, use $s = $this->seek() to remember the current
+	 * position into $s. Then if a chain fails, use $this->seek($s) to
+	 * go back where we started.
+	 */
+	protected function parseChunk() {
+		if (empty($this->buffer)) return false;
+		$s = $this->seek();
+
+		if ($this->whitespace()) {
+			return true;
+		}
+
+		// setting a property
+		if ($this->keyword($key) && $this->assign() &&
+			$this->propertyValue($value, $key) && $this->end())
+		{
+			$this->append(array('assign', $key, $value), $s);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+
+		// look for special css blocks
+		if ($this->literal('@', false)) {
+			$this->count--;
+
+			// media
+			if ($this->literal('@media')) {
+				if (($this->mediaQueryList($mediaQueries) || true)
+					&& $this->literal('{'))
+				{
+					$media = $this->pushSpecialBlock("media");
+					$media->queries = is_null($mediaQueries) ? array() : $mediaQueries;
+					return true;
+				} else {
+					$this->seek($s);
+					return false;
+				}
+			}
+
+			if ($this->literal("@", false) && $this->keyword($dirName)) {
+				if ($this->isDirective($dirName, $this->blockDirectives)) {
+					if (($this->openString("{", $dirValue, null, array(";")) || true) &&
+						$this->literal("{"))
+					{
+						$dir = $this->pushSpecialBlock("directive");
+						$dir->name = $dirName;
+						if (isset($dirValue)) $dir->value = $dirValue;
+						return true;
+					}
+				} elseif ($this->isDirective($dirName, $this->lineDirectives)) {
+					if ($this->propertyValue($dirValue) && $this->end()) {
+						$this->append(array("directive", $dirName, $dirValue));
+						return true;
+					}
+				}
+			}
+
+			$this->seek($s);
+		}
+
+		// setting a variable
+		if ($this->variable($var) && $this->assign() &&
+			$this->propertyValue($value) && $this->end())
+		{
+			$this->append(array('assign', $var, $value), $s);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		if ($this->import($importValue)) {
+			$this->append($importValue, $s);
+			return true;
+		}
+
+		// opening parametric mixin
+		if ($this->tag($tag, true) && $this->argumentDef($args, $isVararg) &&
+			($this->guards($guards) || true) &&
+			$this->literal('{'))
+		{
+			$block = $this->pushBlock($this->fixTags(array($tag)));
+			$block->args = $args;
+			$block->isVararg = $isVararg;
+			if (!empty($guards)) $block->guards = $guards;
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// opening a simple block
+		if ($this->tags($tags) && $this->literal('{', false)) {
+			$tags = $this->fixTags($tags);
+			$this->pushBlock($tags);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// closing a block
+		if ($this->literal('}', false)) {
+			try {
+				$block = $this->pop();
+			} catch (exception $e) {
+				$this->seek($s);
+				$this->throwError($e->getMessage());
+			}
+
+			$hidden = false;
+			if (is_null($block->type)) {
+				$hidden = true;
+				if (!isset($block->args)) {
+					foreach ($block->tags as $tag) {
+						if (!is_string($tag) || $tag{0} != $this->lessc->mPrefix) {
+							$hidden = false;
+							break;
+						}
+					}
+				}
+
+				foreach ($block->tags as $tag) {
+					if (is_string($tag)) {
+						$this->env->children[$tag][] = $block;
+					}
+				}
+			}
+
+			if (!$hidden) {
+				$this->append(array('block', $block), $s);
+			}
+
+			// this is done here so comments aren't bundled into he block that
+			// was just closed
+			$this->whitespace();
+			return true;
+		}
+
+		// mixin
+		if ($this->mixinTags($tags) &&
+			($this->argumentDef($argv, $isVararg) || true) &&
+			($this->keyword($suffix) || true) && $this->end())
+		{
+			$tags = $this->fixTags($tags);
+			$this->append(array('mixin', $tags, $argv, $suffix), $s);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// spare ;
+		if ($this->literal(';')) return true;
+
+		return false; // got nothing, throw error
+	}
+
+	protected function isDirective($dirname, $directives) {
+		// TODO: cache pattern in parser
+		$pattern = implode("|",
+			array_map(array("lessc", "preg_quote"), $directives));
+		$pattern = '/^(-[a-z-]+-)?(' . $pattern . ')$/i';
+
+		return preg_match($pattern, $dirname);
+	}
+
+	protected function fixTags($tags) {
+		// move @ tags out of variable namespace
+		foreach ($tags as &$tag) {
+			if ($tag{0} == $this->lessc->vPrefix)
+				$tag[0] = $this->lessc->mPrefix;
+		}
+		return $tags;
+	}
+
+	// a list of expressions
+	protected function expressionList(&$exps) {
+		$values = array();
+
+		while ($this->expression($exp)) {
+			$values[] = $exp;
+		}
+
+		if (count($values) == 0) return false;
+
+		$exps = lessc::compressList($values, ' ');
+		return true;
+	}
+
+	/**
+	 * Attempt to consume an expression.
+	 * @link http://en.wikipedia.org/wiki/Operator-precedence_parser#Pseudo-code
+	 */
+	protected function expression(&$out) {
+		if ($this->value($lhs)) {
+			$out = $this->expHelper($lhs, 0);
+
+			// look for / shorthand
+			if (!empty($this->env->supressedDivision)) {
+				unset($this->env->supressedDivision);
+				$s = $this->seek();
+				if ($this->literal("/") && $this->value($rhs)) {
+					$out = array("list", "",
+						array($out, array("keyword", "/"), $rhs));
+				} else {
+					$this->seek($s);
+				}
+			}
+
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * recursively parse infix equation with $lhs at precedence $minP
+	 */
+	protected function expHelper($lhs, $minP) {
+		$this->inExp = true;
+		$ss = $this->seek();
+
+		while (true) {
+			$whiteBefore = isset($this->buffer[$this->count - 1]) &&
+				ctype_space($this->buffer[$this->count - 1]);
+
+			// If there is whitespace before the operator, then we require
+			// whitespace after the operator for it to be an expression
+			$needWhite = $whiteBefore && !$this->inParens;
+
+			if ($this->match(self::$operatorString.($needWhite ? '\s' : ''), $m) && self::$precedence[$m[1]] >= $minP) {
+				if (!$this->inParens && isset($this->env->currentProperty) && $m[1] == "/" && empty($this->env->supressedDivision)) {
+					foreach (self::$supressDivisionProps as $pattern) {
+						if (preg_match($pattern, $this->env->currentProperty)) {
+							$this->env->supressedDivision = true;
+							break 2;
+						}
+					}
+				}
+
+
+				$whiteAfter = isset($this->buffer[$this->count - 1]) &&
+					ctype_space($this->buffer[$this->count - 1]);
+
+				if (!$this->value($rhs)) break;
+
+				// peek for next operator to see what to do with rhs
+				if ($this->peek(self::$operatorString, $next) && self::$precedence[$next[1]] > self::$precedence[$m[1]]) {
+					$rhs = $this->expHelper($rhs, self::$precedence[$next[1]]);
+				}
+
+				$lhs = array('expression', $m[1], $lhs, $rhs, $whiteBefore, $whiteAfter);
+				$ss = $this->seek();
+
+				continue;
+			}
+
+			break;
+		}
+
+		$this->seek($ss);
+
+		return $lhs;
+	}
+
+	// consume a list of values for a property
+	public function propertyValue(&$value, $keyName = null) {
+		$values = array();
+
+		if ($keyName !== null) $this->env->currentProperty = $keyName;
+
+		$s = null;
+		while ($this->expressionList($v)) {
+			$values[] = $v;
+			$s = $this->seek();
+			if (!$this->literal(',')) break;
+		}
+
+		if ($s) $this->seek($s);
+
+		if ($keyName !== null) unset($this->env->currentProperty);
+
+		if (count($values) == 0) return false;
+
+		$value = lessc::compressList($values, ', ');
+		return true;
+	}
+
+	protected function parenValue(&$out) {
+		$s = $this->seek();
+
+		// speed shortcut
+		if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "(") {
+			return false;
+		}
+
+		$inParens = $this->inParens;
+		if ($this->literal("(") &&
+			($this->inParens = true) && $this->expression($exp) &&
+			$this->literal(")"))
+		{
+			$out = $exp;
+			$this->inParens = $inParens;
+			return true;
+		} else {
+			$this->inParens = $inParens;
+			$this->seek($s);
+		}
+
+		return false;
+	}
+
+	// a single value
+	protected function value(&$value) {
+		$s = $this->seek();
+
+		// speed shortcut
+		if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "-") {
+			// negation
+			if ($this->literal("-", false) &&
+				(($this->variable($inner) && $inner = array("variable", $inner)) ||
+				$this->unit($inner) ||
+				$this->parenValue($inner)))
+			{
+				$value = array("unary", "-", $inner);
+				return true;
+			} else {
+				$this->seek($s);
+			}
+		}
+
+		if ($this->parenValue($value)) return true;
+		if ($this->unit($value)) return true;
+		if ($this->color($value)) return true;
+		if ($this->func($value)) return true;
+		if ($this->string($value)) return true;
+
+		if ($this->keyword($word)) {
+			$value = array('keyword', $word);
+			return true;
+		}
+
+		// try a variable
+		if ($this->variable($var)) {
+			$value = array('variable', $var);
+			return true;
+		}
+
+		// unquote string (should this work on any type?
+		if ($this->literal("~") && $this->string($str)) {
+			$value = array("escape", $str);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		// css hack: \0
+		if ($this->literal('\\') && $this->match('([0-9]+)', $m)) {
+			$value = array('keyword', '\\'.$m[1]);
+			return true;
+		} else {
+			$this->seek($s);
+		}
+
+		return false;
+	}
+
+	// an import statement
+	protected function import(&$out) {
+		if (!$this->literal('@import')) return false;
+
+		// @import "something.css" media;
+		// @import url("something.css") media;
+		// @import url(something.css) media;
+
+		if ($this->propertyValue($value)) {
+			$out = array("import", $value);
+			return true;
+		}
+	}
+
+	protected function mediaQueryList(&$out) {
+		if ($this->genericList($list, "mediaQuery", ",", false)) {
+			$out = $list[2];
+			return true;
+		}
+		return false;
+	}
+
+	protected function mediaQuery(&$out) {
+		$s = $this->seek();
+
+		$expressions = null;
+		$parts = array();
+
+		if (($this->literal("only") && ($only = true) || $this->literal("not") && ($not = true) || true) && $this->keyword($mediaType)) {
+			$prop = array("mediaType");
+			if (isset($only)) $prop[] = "only";
+			if (isset($not)) $prop[] = "not";
+			$prop[] = $mediaType;
+			$parts[] = $prop;
+		} else {
+			$this->seek($s);
+		}
+
+
+		if (!empty($mediaType) && !$this->literal("and")) {
+			// ~
+		} else {
+			$this->genericList($expressions, "mediaExpression", "and", false);
+			if (is_array($expressions)) $parts = array_merge($parts, $expressions[2]);
+		}
+
+		if (count($parts) == 0) {
+			$this->seek($s);
+			return false;
+		}
+
+		$out = $parts;
+		return true;
+	}
+
+	protected function mediaExpression(&$out) {
+		$s = $this->seek();
+		$value = null;
+		if ($this->literal("(") &&
+			$this->keyword($feature) &&
+			($this->literal(":") && $this->expression($value) || true) &&
+			$this->literal(")"))
+		{
+			$out = array("mediaExp", $feature);
+			if ($value) $out[] = $value;
+			return true;
+		} elseif ($this->variable($variable)) {
+			$out = array('variable', $variable);
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	// an unbounded string stopped by $end
+	protected function openString($end, &$out, $nestingOpen=null, $rejectStrs = null) {
+		$oldWhite = $this->eatWhiteDefault;
+		$this->eatWhiteDefault = false;
+
+		$stop = array("'", '"', "@{", $end);
+		$stop = array_map(array("lessc", "preg_quote"), $stop);
+		// $stop[] = self::$commentMulti;
+
+		if (!is_null($rejectStrs)) {
+			$stop = array_merge($stop, $rejectStrs);
+		}
+
+		$patt = '(.*?)('.implode("|", $stop).')';
+
+		$nestingLevel = 0;
+
+		$content = array();
+		while ($this->match($patt, $m, false)) {
+			if (!empty($m[1])) {
+				$content[] = $m[1];
+				if ($nestingOpen) {
+					$nestingLevel += substr_count($m[1], $nestingOpen);
+				}
+			}
+
+			$tok = $m[2];
+
+			$this->count-= strlen($tok);
+			if ($tok == $end) {
+				if ($nestingLevel == 0) {
+					break;
+				} else {
+					$nestingLevel--;
+				}
+			}
+
+			if (($tok == "'" || $tok == '"') && $this->string($str)) {
+				$content[] = $str;
+				continue;
+			}
+
+			if ($tok == "@{" && $this->interpolation($inter)) {
+				$content[] = $inter;
+				continue;
+			}
+
+			if (!empty($rejectStrs) && in_array($tok, $rejectStrs)) {
+				break;
+			}
+
+			$content[] = $tok;
+			$this->count+= strlen($tok);
+		}
+
+		$this->eatWhiteDefault = $oldWhite;
+
+		if (count($content) == 0) return false;
+
+		// trim the end
+		if (is_string(end($content))) {
+			$content[count($content) - 1] = rtrim(end($content));
+		}
+
+		$out = array("string", "", $content);
+		return true;
+	}
+
+	protected function string(&$out) {
+		$s = $this->seek();
+		if ($this->literal('"', false)) {
+			$delim = '"';
+		} elseif ($this->literal("'", false)) {
+			$delim = "'";
+		} else {
+			return false;
+		}
+
+		$content = array();
+
+		// look for either ending delim , escape, or string interpolation
+		$patt = '([^\n]*?)(@\{|\\\\|' .
+			lessc::preg_quote($delim).')';
+
+		$oldWhite = $this->eatWhiteDefault;
+		$this->eatWhiteDefault = false;
+
+		while ($this->match($patt, $m, false)) {
+			$content[] = $m[1];
+			if ($m[2] == "@{") {
+				$this->count -= strlen($m[2]);
+				if ($this->interpolation($inter, false)) {
+					$content[] = $inter;
+				} else {
+					$this->count += strlen($m[2]);
+					$content[] = "@{"; // ignore it
+				}
+			} elseif ($m[2] == '\\') {
+				$content[] = $m[2];
+				if ($this->literal($delim, false)) {
+					$content[] = $delim;
+				}
+			} else {
+				$this->count -= strlen($delim);
+				break; // delim
+			}
+		}
+
+		$this->eatWhiteDefault = $oldWhite;
+
+		if ($this->literal($delim)) {
+			$out = array("string", $delim, $content);
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	protected function interpolation(&$out) {
+		$oldWhite = $this->eatWhiteDefault;
+		$this->eatWhiteDefault = true;
+
+		$s = $this->seek();
+		if ($this->literal("@{") &&
+			$this->openString("}", $interp, null, array("'", '"', ";")) &&
+			$this->literal("}", false))
+		{
+			$out = array("interpolate", $interp);
+			$this->eatWhiteDefault = $oldWhite;
+			if ($this->eatWhiteDefault) $this->whitespace();
+			return true;
+		}
+
+		$this->eatWhiteDefault = $oldWhite;
+		$this->seek($s);
+		return false;
+	}
+
+	protected function unit(&$unit) {
+		// speed shortcut
+		if (isset($this->buffer[$this->count])) {
+			$char = $this->buffer[$this->count];
+			if (!ctype_digit($char) && $char != ".") return false;
+		}
+
+		if ($this->match('([0-9]+(?:\.[0-9]*)?|\.[0-9]+)([%a-zA-Z]+)?', $m)) {
+			$unit = array("number", $m[1], empty($m[2]) ? "" : $m[2]);
+			return true;
+		}
+		return false;
+	}
+
+	// a # color
+	protected function color(&$out) {
+		if ($this->match('(#(?:[0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{3}))', $m)) {
+			if (strlen($m[1]) > 7) {
+				$out = array("string", "", array($m[1]));
+			} else {
+				$out = array("raw_color", $m[1]);
+			}
+			return true;
+		}
+
+		return false;
+	}
+
+	// consume an argument definition list surrounded by ()
+	// each argument is a variable name with optional value
+	// or at the end a ... or a variable named followed by ...
+	// arguments are separated by , unless a ; is in the list, then ; is the
+	// delimiter.
+	protected function argumentDef(&$args, &$isVararg) {
+		$s = $this->seek();
+		if (!$this->literal('(')) return false;
+
+		$values = array();
+		$delim = ",";
+		$method = "expressionList";
+
+		$isVararg = false;
+		while (true) {
+			if ($this->literal("...")) {
+				$isVararg = true;
+				break;
+			}
+
+			if ($this->$method($value)) {
+				if ($value[0] == "variable") {
+					$arg = array("arg", $value[1]);
+					$ss = $this->seek();
+
+					if ($this->assign() && $this->$method($rhs)) {
+						$arg[] = $rhs;
+					} else {
+						$this->seek($ss);
+						if ($this->literal("...")) {
+							$arg[0] = "rest";
+							$isVararg = true;
+						}
+					}
+
+					$values[] = $arg;
+					if ($isVararg) break;
+					continue;
+				} else {
+					$values[] = array("lit", $value);
+				}
+			}
+
+
+			if (!$this->literal($delim)) {
+				if ($delim == "," && $this->literal(";")) {
+					// found new delim, convert existing args
+					$delim = ";";
+					$method = "propertyValue";
+
+					// transform arg list
+					if (isset($values[1])) { // 2 items
+						$newList = array();
+						foreach ($values as $i => $arg) {
+							switch($arg[0]) {
+							case "arg":
+								if ($i) {
+									$this->throwError("Cannot mix ; and , as delimiter types");
+								}
+								$newList[] = $arg[2];
+								break;
+							case "lit":
+								$newList[] = $arg[1];
+								break;
+							case "rest":
+								$this->throwError("Unexpected rest before semicolon");
+							}
+						}
+
+						$newList = array("list", ", ", $newList);
+
+						switch ($values[0][0]) {
+						case "arg":
+							$newArg = array("arg", $values[0][1], $newList);
+							break;
+						case "lit":
+							$newArg = array("lit", $newList);
+							break;
+						}
+
+					} elseif ($values) { // 1 item
+						$newArg = $values[0];
+					}
+
+					if ($newArg) {
+						$values = array($newArg);
+					}
+				} else {
+					break;
+				}
+			}
+		}
+
+		if (!$this->literal(')')) {
+			$this->seek($s);
+			return false;
+		}
+
+		$args = $values;
+
+		return true;
+	}
+
+	// consume a list of tags
+	// this accepts a hanging delimiter
+	protected function tags(&$tags, $simple = false, $delim = ',') {
+		$tags = array();
+		while ($this->tag($tt, $simple)) {
+			$tags[] = $tt;
+			if (!$this->literal($delim)) break;
+		}
+		if (count($tags) == 0) return false;
+
+		return true;
+	}
+
+	// list of tags of specifying mixin path
+	// optionally separated by > (lazy, accepts extra >)
+	protected function mixinTags(&$tags) {
+		$tags = array();
+		while ($this->tag($tt, true)) {
+			$tags[] = $tt;
+			$this->literal(">");
+		}
+
+		if (count($tags) == 0) return false;
+
+		return true;
+	}
+
+	// a bracketed value (contained within in a tag definition)
+	protected function tagBracket(&$parts, &$hasExpression) {
+		// speed shortcut
+		if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "[") {
+			return false;
+		}
+
+		$s = $this->seek();
+
+		$hasInterpolation = false;
+
+		if ($this->literal("[", false)) {
+			$attrParts = array("[");
+			// keyword, string, operator
+			while (true) {
+				if ($this->literal("]", false)) {
+					$this->count--;
+					break; // get out early
+				}
+
+				if ($this->match('\s+', $m)) {
+					$attrParts[] = " ";
+					continue;
+				}
+				if ($this->string($str)) {
+					// escape parent selector, (yuck)
+					foreach ($str[2] as &$chunk) {
+						$chunk = str_replace($this->lessc->parentSelector, "$&$", $chunk);
+					}
+
+					$attrParts[] = $str;
+					$hasInterpolation = true;
+					continue;
+				}
+
+				if ($this->keyword($word)) {
+					$attrParts[] = $word;
+					continue;
+				}
+
+				if ($this->interpolation($inter, false)) {
+					$attrParts[] = $inter;
+					$hasInterpolation = true;
+					continue;
+				}
+
+				// operator, handles attr namespace too
+				if ($this->match('[|-~\$\*\^=]+', $m)) {
+					$attrParts[] = $m[0];
+					continue;
+				}
+
+				break;
+			}
+
+			if ($this->literal("]", false)) {
+				$attrParts[] = "]";
+				foreach ($attrParts as $part) {
+					$parts[] = $part;
+				}
+				$hasExpression = $hasExpression || $hasInterpolation;
+				return true;
+			}
+			$this->seek($s);
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	// a space separated list of selectors
+	protected function tag(&$tag, $simple = false) {
+		if ($simple)
+			$chars = '^@,:;{}\][>\(\) "\'';
+		else
+			$chars = '^@,;{}["\'';
+
+		$s = $this->seek();
+
+		$hasExpression = false;
+		$parts = array();
+		while ($this->tagBracket($parts, $hasExpression));
+
+		$oldWhite = $this->eatWhiteDefault;
+		$this->eatWhiteDefault = false;
+
+		while (true) {
+			if ($this->match('(['.$chars.'0-9]['.$chars.']*)', $m)) {
+				$parts[] = $m[1];
+				if ($simple) break;
+
+				while ($this->tagBracket($parts, $hasExpression));
+				continue;
+			}
+
+			if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "@") {
+				if ($this->interpolation($interp)) {
+					$hasExpression = true;
+					$interp[2] = true; // don't unescape
+					$parts[] = $interp;
+					continue;
+				}
+
+				if ($this->literal("@")) {
+					$parts[] = "@";
+					continue;
+				}
+			}
+
+			if ($this->unit($unit)) { // for keyframes
+				$parts[] = $unit[1];
+				$parts[] = $unit[2];
+				continue;
+			}
+
+			break;
+		}
+
+		$this->eatWhiteDefault = $oldWhite;
+		if (!$parts) {
+			$this->seek($s);
+			return false;
+		}
+
+		if ($hasExpression) {
+			$tag = array("exp", array("string", "", $parts));
+		} else {
+			$tag = trim(implode($parts));
+		}
+
+		$this->whitespace();
+		return true;
+	}
+
+	// a css function
+	protected function func(&$func) {
+		$s = $this->seek();
+
+		if ($this->match('(%|[\w\-_][\w\-_:\.]+|[\w_])', $m) && $this->literal('(')) {
+			$fname = $m[1];
+
+			$sPreArgs = $this->seek();
+
+			$args = array();
+			while (true) {
+				$ss = $this->seek();
+				// this ugly nonsense is for ie filter properties
+				if ($this->keyword($name) && $this->literal('=') && $this->expressionList($value)) {
+					$args[] = array("string", "", array($name, "=", $value));
+				} else {
+					$this->seek($ss);
+					if ($this->expressionList($value)) {
+						$args[] = $value;
+					}
+				}
+
+				if (!$this->literal(',')) break;
+			}
+			$args = array('list', ',', $args);
+
+			if ($this->literal(')')) {
+				$func = array('function', $fname, $args);
+				return true;
+			} elseif ($fname == 'url') {
+				// couldn't parse and in url? treat as string
+				$this->seek($sPreArgs);
+				if ($this->openString(")", $string) && $this->literal(")")) {
+					$func = array('function', $fname, $string);
+					return true;
+				}
+			}
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	// consume a less variable
+	protected function variable(&$name) {
+		$s = $this->seek();
+		if ($this->literal($this->lessc->vPrefix, false) &&
+			($this->variable($sub) || $this->keyword($name)))
+		{
+			if (!empty($sub)) {
+				$name = array('variable', $sub);
+			} else {
+				$name = $this->lessc->vPrefix.$name;
+			}
+			return true;
+		}
+
+		$name = null;
+		$this->seek($s);
+		return false;
+	}
+
+	/**
+	 * Consume an assignment operator
+	 * Can optionally take a name that will be set to the current property name
+	 */
+	protected function assign($name = null) {
+		if ($name) $this->currentProperty = $name;
+		return $this->literal(':') || $this->literal('=');
+	}
+
+	// consume a keyword
+	protected function keyword(&$word) {
+		if ($this->match('([\w_\-\*!"][\w\-_"]*)', $m)) {
+			$word = $m[1];
+			return true;
+		}
+		return false;
+	}
+
+	// consume an end of statement delimiter
+	protected function end() {
+		if ($this->literal(';', false)) {
+			return true;
+		} elseif ($this->count == strlen($this->buffer) || $this->buffer[$this->count] == '}') {
+			// if there is end of file or a closing block next then we don't need a ;
+			return true;
+		}
+		return false;
+	}
+
+	protected function guards(&$guards) {
+		$s = $this->seek();
+
+		if (!$this->literal("when")) {
+			$this->seek($s);
+			return false;
+		}
+
+		$guards = array();
+
+		while ($this->guardGroup($g)) {
+			$guards[] = $g;
+			if (!$this->literal(",")) break;
+		}
+
+		if (count($guards) == 0) {
+			$guards = null;
+			$this->seek($s);
+			return false;
+		}
+
+		return true;
+	}
+
+	// a bunch of guards that are and'd together
+	// TODO rename to guardGroup
+	protected function guardGroup(&$guardGroup) {
+		$s = $this->seek();
+		$guardGroup = array();
+		while ($this->guard($guard)) {
+			$guardGroup[] = $guard;
+			if (!$this->literal("and")) break;
+		}
+
+		if (count($guardGroup) == 0) {
+			$guardGroup = null;
+			$this->seek($s);
+			return false;
+		}
+
+		return true;
+	}
+
+	protected function guard(&$guard) {
+		$s = $this->seek();
+		$negate = $this->literal("not");
+
+		if ($this->literal("(") && $this->expression($exp) && $this->literal(")")) {
+			$guard = $exp;
+			if ($negate) $guard = array("negate", $guard);
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	/* raw parsing functions */
+
+	protected function literal($what, $eatWhitespace = null) {
+		if ($eatWhitespace === null) $eatWhitespace = $this->eatWhiteDefault;
+
+		// shortcut on single letter
+		if (!isset($what[1]) && isset($this->buffer[$this->count])) {
+			if ($this->buffer[$this->count] == $what) {
+				if (!$eatWhitespace) {
+					$this->count++;
+					return true;
+				}
+				// goes below...
+			} else {
+				return false;
+			}
+		}
+
+		if (!isset(self::$literalCache[$what])) {
+			self::$literalCache[$what] = lessc::preg_quote($what);
+		}
+
+		return $this->match(self::$literalCache[$what], $m, $eatWhitespace);
+	}
+
+	protected function genericList(&$out, $parseItem, $delim="", $flatten=true) {
+		$s = $this->seek();
+		$items = array();
+		while ($this->$parseItem($value)) {
+			$items[] = $value;
+			if ($delim) {
+				if (!$this->literal($delim)) break;
+			}
+		}
+
+		if (count($items) == 0) {
+			$this->seek($s);
+			return false;
+		}
+
+		if ($flatten && count($items) == 1) {
+			$out = $items[0];
+		} else {
+			$out = array("list", $delim, $items);
+		}
+
+		return true;
+	}
+
+
+	// advance counter to next occurrence of $what
+	// $until - don't include $what in advance
+	// $allowNewline, if string, will be used as valid char set
+	protected function to($what, &$out, $until = false, $allowNewline = false) {
+		if (is_string($allowNewline)) {
+			$validChars = $allowNewline;
+		} else {
+			$validChars = $allowNewline ? "." : "[^\n]";
+		}
+		if (!$this->match('('.$validChars.'*?)'.lessc::preg_quote($what), $m, !$until)) return false;
+		if ($until) $this->count -= strlen($what); // give back $what
+		$out = $m[1];
+		return true;
+	}
+
+	// try to match something on head of buffer
+	protected function match($regex, &$out, $eatWhitespace = null) {
+		if ($eatWhitespace === null) $eatWhitespace = $this->eatWhiteDefault;
+
+		$r = '/'.$regex.($eatWhitespace && !$this->writeComments ? '\s*' : '').'/Ais';
+		if (preg_match($r, $this->buffer, $out, null, $this->count)) {
+			$this->count += strlen($out[0]);
+			if ($eatWhitespace && $this->writeComments) $this->whitespace();
+			return true;
+		}
+		return false;
+	}
+
+	// match some whitespace
+	protected function whitespace() {
+		if ($this->writeComments) {
+			$gotWhite = false;
+			while (preg_match(self::$whitePattern, $this->buffer, $m, null, $this->count)) {
+				if (isset($m[1]) && empty($this->seenComments[$this->count])) {
+					$this->append(array("comment", $m[1]));
+					$this->seenComments[$this->count] = true;
+				}
+				$this->count += strlen($m[0]);
+				$gotWhite = true;
+			}
+			return $gotWhite;
+		} else {
+			$this->match("", $m);
+			return strlen($m[0]) > 0;
+		}
+	}
+
+	// match something without consuming it
+	protected function peek($regex, &$out = null, $from=null) {
+		if (is_null($from)) $from = $this->count;
+		$r = '/'.$regex.'/Ais';
+		$result = preg_match($r, $this->buffer, $out, null, $from);
+
+		return $result;
+	}
+
+	// seek to a spot in the buffer or return where we are on no argument
+	protected function seek($where = null) {
+		if ($where === null) return $this->count;
+		else $this->count = $where;
+		return true;
+	}
+
+	/* misc functions */
+
+	public function throwError($msg = "parse error", $count = null) {
+		$count = is_null($count) ? $this->count : $count;
+
+		$line = $this->line +
+			substr_count(substr($this->buffer, 0, $count), "\n");
+
+		if (!empty($this->sourceName)) {
+			$loc = "$this->sourceName on line $line";
+		} else {
+			$loc = "line: $line";
+		}
+
+		// TODO this depends on $this->count
+		if ($this->peek("(.*?)(\n|$)", $m, $count)) {
+			throw new exception("$msg: failed at `$m[1]` $loc");
+		} else {
+			throw new exception("$msg: $loc");
+		}
+	}
+
+	protected function pushBlock($selectors=null, $type=null) {
+		$b = new stdclass;
+		$b->parent = $this->env;
+
+		$b->type = $type;
+		$b->id = self::$nextBlockId++;
+
+		$b->isVararg = false; // TODO: kill me from here
+		$b->tags = $selectors;
+
+		$b->props = array();
+		$b->children = array();
+
+		$this->env = $b;
+		return $b;
+	}
+
+	// push a block that doesn't multiply tags
+	protected function pushSpecialBlock($type) {
+		return $this->pushBlock(null, $type);
+	}
+
+	// append a property to the current block
+	protected function append($prop, $pos = null) {
+		if ($pos !== null) $prop[-1] = $pos;
+		$this->env->props[] = $prop;
+	}
+
+	// pop something off the stack
+	protected function pop() {
+		$old = $this->env;
+		$this->env = $this->env->parent;
+		return $old;
+	}
+
+	// remove comments from $text
+	// todo: make it work for all functions, not just url
+	protected function removeComments($text) {
+		$look = array(
+			'url(', '//', '/*', '"', "'"
+		);
+
+		$out = '';
+		$min = null;
+		while (true) {
+			// find the next item
+			foreach ($look as $token) {
+				$pos = strpos($text, $token);
+				if ($pos !== false) {
+					if (!isset($min) || $pos < $min[1]) $min = array($token, $pos);
+				}
+			}
+
+			if (is_null($min)) break;
+
+			$count = $min[1];
+			$skip = 0;
+			$newlines = 0;
+			switch ($min[0]) {
+			case 'url(':
+				if (preg_match('/url\(.*?\)/', $text, $m, 0, $count))
+					$count += strlen($m[0]) - strlen($min[0]);
+				break;
+			case '"':
+			case "'":
+				if (preg_match('/'.$min[0].'.*?(?<!\\\\)'.$min[0].'/', $text, $m, 0, $count))
+					$count += strlen($m[0]) - 1;
+				break;
+			case '//':
+				$skip = strpos($text, "\n", $count);
+				if ($skip === false) $skip = strlen($text) - $count;
+				else $skip -= $count;
+				break;
+			case '/*':
+				if (preg_match('/\/\*.*?\*\//s', $text, $m, 0, $count)) {
+					$skip = strlen($m[0]);
+					$newlines = substr_count($m[0], "\n");
+				}
+				break;
+			}
+
+			if ($skip == 0) $count += strlen($min[0]);
+
+			$out .= substr($text, 0, $count).str_repeat("\n", $newlines);
+			$text = substr($text, $count + $skip);
+
+			$min = null;
+		}
+
+		return $out.$text;
+	}
+
+}
+
+class lessc_formatter_classic {
+	public $indentChar = "  ";
+
+	public $break = "\n";
+	public $open = " {";
+	public $close = "}";
+	public $selectorSeparator = ", ";
+	public $assignSeparator = ":";
+
+	public $openSingle = " { ";
+	public $closeSingle = " }";
+
+	public $disableSingle = false;
+	public $breakSelectors = false;
+
+	public $compressColors = false;
+
+	public function __construct() {
+		$this->indentLevel = 0;
+	}
+
+	public function indentStr($n = 0) {
+		return str_repeat($this->indentChar, max($this->indentLevel + $n, 0));
+	}
+
+	public function property($name, $value) {
+		return $name . $this->assignSeparator . $value . ";";
+	}
+
+	protected function isEmpty($block) {
+		if (empty($block->lines)) {
+			foreach ($block->children as $child) {
+				if (!$this->isEmpty($child)) return false;
+			}
+
+			return true;
+		}
+		return false;
+	}
+
+	public function block($block) {
+		if ($this->isEmpty($block)) return;
+
+		$inner = $pre = $this->indentStr();
+
+		$isSingle = !$this->disableSingle &&
+			is_null($block->type) && count($block->lines) == 1;
+
+		if (!empty($block->selectors)) {
+			$this->indentLevel++;
+
+			if ($this->breakSelectors) {
+				$selectorSeparator = $this->selectorSeparator . $this->break . $pre;
+			} else {
+				$selectorSeparator = $this->selectorSeparator;
+			}
+
+			echo $pre .
+				implode($selectorSeparator, $block->selectors);
+			if ($isSingle) {
+				echo $this->openSingle;
+				$inner = "";
+			} else {
+				echo $this->open . $this->break;
+				$inner = $this->indentStr();
+			}
+
+		}
+
+		if (!empty($block->lines)) {
+			$glue = $this->break.$inner;
+			echo $inner . implode($glue, $block->lines);
+			if (!$isSingle && !empty($block->children)) {
+				echo $this->break;
+			}
+		}
+
+		foreach ($block->children as $child) {
+			$this->block($child);
+		}
+
+		if (!empty($block->selectors)) {
+			if (!$isSingle && empty($block->children)) echo $this->break;
+
+			if ($isSingle) {
+				echo $this->closeSingle . $this->break;
+			} else {
+				echo $pre . $this->close . $this->break;
+			}
+
+			$this->indentLevel--;
+		}
+	}
+}
+
+class lessc_formatter_compressed extends lessc_formatter_classic {
+	public $disableSingle = true;
+	public $open = "{";
+	public $selectorSeparator = ",";
+	public $assignSeparator = ":";
+	public $break = "";
+	public $compressColors = true;
+
+	public function indentStr($n = 0) {
+		return "";
+	}
+}
+
+class lessc_formatter_lessjs extends lessc_formatter_classic {
+	public $disableSingle = true;
+	public $breakSelectors = true;
+	public $assignSeparator = ": ";
+	public $selectorSeparator = ",";
+}
+
+
diff --git a/vendor/leafo/lessphp/lessify b/vendor/leafo/lessphp/lessify
new file mode 100644
index 00000000..becc5388
--- /dev/null
+++ b/vendor/leafo/lessphp/lessify
@@ -0,0 +1,23 @@
+#!/usr/bin/php
+<?php
+
+if (php_sapi_name() != "cli") {
+	err($fa.$argv[0]." must be run in the command line.");
+	exit(1);
+}
+$exe = array_shift($argv); // remove filename
+
+if (!$fname = array_shift($argv)) {
+	exit("Usage: ".$exe." input-file\n");
+}
+
+require "lessify.inc.php";
+
+try  {
+	$parser = new lessify($fname);
+	echo $parser->parse();
+} catch (exception $e) {
+	exit("Fatal error: ".$e->getMessage()."\n");
+}
+
+
diff --git a/vendor/leafo/lessphp/lessify.inc.php b/vendor/leafo/lessphp/lessify.inc.php
new file mode 100644
index 00000000..91c14423
--- /dev/null
+++ b/vendor/leafo/lessphp/lessify.inc.php
@@ -0,0 +1,447 @@
+<?php
+/**
+ * lessify
+ * Convert a css file into a less file
+ * http://leafo.net/lessphp
+ * Copyright 2010, leaf corcoran <leafot@gmail.com>
+ *
+ * WARNING: THIS DOES NOT WORK ANYMORE. NEEDS TO BE UPDATED FOR
+ * LATEST VERSION OF LESSPHP.
+ *
+ */
+
+require "lessc.inc.php";
+
+//
+// check if the merge during mixin is overwriting values. should or should it not?
+//
+
+//
+// 1. split apart class tags
+//
+
+class easyparse {
+	var $buffer;
+	var $count;
+
+	function __construct($str) {
+		$this->count = 0;
+		$this->buffer = trim($str);
+	}
+
+	function seek($where = null) {
+		if ($where === null) return $this->count;
+		else $this->count = $where;
+		return true;
+	}
+
+	function preg_quote($what) {
+		return preg_quote($what, '/');
+	}
+
+	function match($regex, &$out, $eatWhitespace = true) {
+		$r = '/'.$regex.($eatWhitespace ? '\s*' : '').'/Ais';
+		if (preg_match($r, $this->buffer, $out, null, $this->count)) {
+			$this->count += strlen($out[0]);
+			return true;
+		}
+		return false;
+	}
+
+	function literal($what, $eatWhitespace = true) {
+		// this is here mainly prevent notice from { } string accessor
+		if ($this->count >= strlen($this->buffer)) return false;
+
+		// shortcut on single letter
+		if (!$eatWhitespace and strlen($what) == 1) {
+			if ($this->buffer{$this->count} == $what) {
+				$this->count++;
+				return true;
+			}
+			else return false;
+		}
+
+		return $this->match($this->preg_quote($what), $m, $eatWhitespace);
+	}
+
+}
+
+class tagparse extends easyparse {
+	static private $combinators = null;
+	static private $match_opts = null;
+
+	function parse() {
+		if (empty(self::$combinators)) {
+			self::$combinators = '('.implode('|', array_map(array($this, 'preg_quote'),
+				array('+', '>', '~'))).')';
+			self::$match_opts = '('.implode('|', array_map(array($this, 'preg_quote'),
+				array('=', '~=', '|=', '$=', '*='))).')';
+		}
+
+		// crush whitespace
+		$this->buffer = preg_replace('/\s+/', ' ', $this->buffer).' ';
+
+		$tags = array();
+		while ($this->tag($t)) $tags[] = $t;
+
+		return $tags;
+	}
+
+	static function compileString($string) {
+		list(, $delim, $str) = $string;
+		$str = str_replace($delim, "\\".$delim, $str);
+		$str = str_replace("\n", "\\\n", $str);
+		return $delim.$str.$delim;
+	}
+
+	static function compilePaths($paths) {
+		return implode(', ', array_map(array('self', 'compilePath'), $paths));
+	}
+
+	// array of tags
+	static function compilePath($path) {
+		return implode(' ', array_map(array('self', 'compileTag'), $path));
+	}
+
+
+	static function compileTag($tag) {
+		ob_start();
+		if (isset($tag['comb'])) echo $tag['comb']." ";
+		if (isset($tag['front'])) echo $tag['front'];
+		if (isset($tag['attr'])) {
+			echo '['.$tag['attr'];
+			if (isset($tag['op'])) {
+				echo $tag['op'].$tag['op_value'];
+			}
+			echo ']';
+		}
+		return ob_get_clean();
+	}
+
+	function string(&$out) {
+		$s = $this->seek();
+
+		if ($this->literal('"')) {
+			$delim = '"';
+		} elseif ($this->literal("'")) {
+			$delim = "'";
+		} else {
+			return false;
+		}
+
+		while (true) {
+			// step through letters looking for either end or escape
+			$buff = "";
+			$escapeNext = false;
+			$finished = false;
+			for ($i = $this->count; $i < strlen($this->buffer); $i++) {
+				$char = $this->buffer[$i];
+				switch ($char) {
+				case $delim:
+					if ($escapeNext) {
+						$buff .= $char;
+						$escapeNext = false;
+						break;
+					}
+					$finished = true;
+					break 2;
+				case "\\":
+					if ($escapeNext) {
+						$buff .= $char;
+						$escapeNext = false;
+					} else {
+						$escapeNext = true;
+					}
+					break;
+				case "\n":
+					if (!$escapeNext) {
+						break 3;
+					}
+
+					$buff .= $char;
+					$escapeNext = false;
+					break;
+				default:
+					if ($escapeNext) {
+						$buff .= "\\";
+						$escapeNext = false;
+					}
+					$buff .= $char;
+				}
+			}
+			if (!$finished) break;
+			$out = array('string', $delim, $buff);
+			$this->seek($i+1);
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	function tag(&$out) {
+		$s = $this->seek();
+		$tag = array();
+		if ($this->combinator($op)) $tag['comb'] = $op;
+
+		if (!$this->match('(.*?)( |$|\[|'.self::$combinators.')', $match)) {
+			$this->seek($s);
+			return false;
+		}
+
+		if (!empty($match[3])) {
+			// give back combinator
+			$this->count-=strlen($match[3]);
+		}
+
+		if (!empty($match[1])) $tag['front'] = $match[1];
+
+		if ($match[2] == '[') {
+			if ($this->ident($i)) {
+				$tag['attr'] = $i;
+
+				if ($this->match(self::$match_opts, $m) && $this->value($v)) {
+					$tag['op'] = $m[1];
+					$tag['op_value'] = $v;
+				}
+
+				if ($this->literal(']')) {
+					$out = $tag;
+					return true;
+				}
+			}
+		} elseif (isset($tag['front'])) {
+			$out = $tag;
+			return true;
+		}
+
+		$this->seek($s);
+		return false;
+	}
+
+	function ident(&$out) {
+		// [-]?{nmstart}{nmchar}*
+		// nmstart: [_a-z]|{nonascii}|{escape}
+		// nmchar: [_a-z0-9-]|{nonascii}|{escape}
+		if ($this->match('(-?[_a-z][_\w]*)', $m)) {
+			$out = $m[1];
+			return true;
+		}
+		return false;
+	}
+
+	function value(&$out) {
+		if ($this->string($str)) {
+			$out = $this->compileString($str);
+			return true;
+		} elseif ($this->ident($id)) {
+			$out = $id;
+			return true;
+		}
+		return false;
+	}
+
+
+	function combinator(&$op) {
+		if ($this->match(self::$combinators, $m)) {
+			$op = $m[1];
+			return true;
+		}
+		return false;
+	}
+}
+
+class nodecounter {
+	var $count = 0;
+	var $children = array();
+
+	var $name;
+	var $child_blocks;
+	var $the_block;
+
+	function __construct($name) {
+		$this->name = $name;
+	}
+
+	function dump($stack = null) {
+		if (is_null($stack)) $stack = array();
+		$stack[] = $this->getName();
+		echo implode(' -> ', $stack)." ($this->count)\n";
+		foreach ($this->children as $child) {
+			$child->dump($stack);
+		}
+	}
+
+	static function compileProperties($c, $block) {
+		foreach($block as $name => $value) {
+			if ($c->isProperty($name, $value)) {
+				echo $c->compileProperty($name, $value)."\n";
+			}
+		}
+	}
+
+	function compile($c, $path = null) {
+		if (is_null($path)) $path = array();
+		$path[] = $this->name;
+
+		$isVisible = !is_null($this->the_block) || !is_null($this->child_blocks);
+
+		if ($isVisible) {
+			echo $c->indent(implode(' ', $path).' {');
+			$c->indentLevel++;
+			$path = array();
+
+			if ($this->the_block) {
+				$this->compileProperties($c, $this->the_block);
+			}
+
+			if ($this->child_blocks) {
+				foreach ($this->child_blocks as $block) {
+					echo $c->indent(tagparse::compilePaths($block['__tags']).' {');
+					$c->indentLevel++;
+					$this->compileProperties($c, $block);
+					$c->indentLevel--;
+					echo $c->indent('}');
+				}
+			}
+		}
+
+		// compile child nodes
+		foreach($this->children as $node) {
+			$node->compile($c, $path);
+		}
+
+		if ($isVisible) {
+			$c->indentLevel--;
+			echo $c->indent('}');
+		}
+
+	}
+
+	function getName() {
+		if (is_null($this->name)) return "[root]";
+		else return $this->name;
+	}
+
+	function getNode($name) {
+		if (!isset($this->children[$name])) {
+			$this->children[$name] = new nodecounter($name);
+		}
+
+		return $this->children[$name];
+	}
+
+	function findNode($path) {
+		$current = $this;
+		for ($i = 0; $i < count($path); $i++) {
+			$t = tagparse::compileTag($path[$i]);
+			$current = $current->getNode($t);
+		}
+
+		return $current;
+	}
+
+	function addBlock($path, $block) {
+		$node = $this->findNode($path);
+		if (!is_null($node->the_block)) throw new exception("can this happen?");
+
+		unset($block['__tags']);
+		$node->the_block = $block;
+	}
+
+	function addToNode($path, $block) {
+		$node = $this->findNode($path);
+		$node->child_blocks[] = $block;
+	}
+}
+
+/**
+ * create a less file from a css file by combining blocks where appropriate
+ */
+class lessify extends lessc {
+	public function dump() {
+		print_r($this->env);
+	}
+
+	public function parse($str = null) {
+		$this->prepareParser($str ? $str : $this->buffer);
+		while (false !== $this->parseChunk());
+
+		$root = new nodecounter(null);
+
+		// attempt to preserve some of the block order
+		$order = array();
+
+		$visitedTags = array();
+		foreach (end($this->env) as $name => $block) {
+			if (!$this->isBlock($name, $block)) continue;
+			if (isset($visitedTags[$name])) continue;
+
+			foreach ($block['__tags'] as $t) {
+				$visitedTags[$t] = true;
+			}
+
+			// skip those with more than 1
+			if (count($block['__tags']) == 1) {
+				$p = new tagparse(end($block['__tags']));
+				$path = $p->parse();
+				$root->addBlock($path, $block);
+				$order[] = array('compressed', $path, $block);
+				continue;
+			} else {
+				$common = null;
+				$paths = array();
+				foreach ($block['__tags'] as $rawtag) {
+					$p = new tagparse($rawtag);
+					$paths[] = $path = $p->parse();
+					if (is_null($common)) $common = $path;
+					else {
+						$new_common = array();
+						foreach ($path as $tag) {
+							$head = array_shift($common);
+							if ($tag == $head) {
+								$new_common[] = $head;
+							} else break;
+						}
+						$common = $new_common;
+						if (empty($common)) {
+							// nothing in common
+							break;
+						}
+					}
+				}
+
+				if (!empty($common)) {
+					$new_paths = array();
+					foreach ($paths as $p) $new_paths[] = array_slice($p, count($common));
+					$block['__tags'] = $new_paths;
+					$root->addToNode($common, $block);
+					$order[] = array('compressed', $common, $block);
+					continue;
+				}
+
+			}
+
+			$order[] = array('none', $block['__tags'], $block);
+		}
+
+
+		$compressed = $root->children;
+		foreach ($order as $item) {
+			list($type, $tags, $block) = $item;
+			if ($type == 'compressed') {
+				$top = tagparse::compileTag(reset($tags));
+				if (isset($compressed[$top])) {
+					$compressed[$top]->compile($this);
+					unset($compressed[$top]);
+				}
+			} else {
+				echo $this->indent(implode(', ', $tags).' {');
+				$this->indentLevel++;
+				nodecounter::compileProperties($this, $block);
+				$this->indentLevel--;
+				echo $this->indent('}');
+			}
+		}
+	}
+}
diff --git a/vendor/leafo/lessphp/package.sh b/vendor/leafo/lessphp/package.sh
new file mode 100644
index 00000000..f0888f12
--- /dev/null
+++ b/vendor/leafo/lessphp/package.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+# creates tar.gz for current version
+
+VERSION=`./plessc -v | sed -n 's/^v\(.*\)$/\1/p'`
+OUT_DIR="tmp/lessphp"
+TMP=`dirname $OUT_DIR`
+
+mkdir -p $OUT_DIR
+tar -c `git ls-files` | tar -C $OUT_DIR -x
+
+rm $OUT_DIR/.gitignore
+rm $OUT_DIR/package.sh
+rm $OUT_DIR/lessify
+rm $OUT_DIR/lessify.inc.php
+
+OUT_NAME="lessphp-$VERSION.tar.gz"
+tar -czf $OUT_NAME -C $TMP lessphp/
+echo "Wrote $OUT_NAME"
+
+rm -r $TMP
+
+
+echo
+echo "Don't forget to"
+echo "* Update the version in lessc.inc.php (two places)"
+echo "* Update the version in the README.md"
+echo "* Update the version in docs.md (two places)"
+echo "* Update the version in LICENSE"
+echo "* Update @current_version in site.moon"
+echo "* Add entry to feed.moon for changelog"
+echo "* Update the -New- area on homepage with date and features"
+echo
+
+
diff --git a/vendor/leafo/lessphp/plessc b/vendor/leafo/lessphp/plessc
new file mode 100644
index 00000000..1871dc77
--- /dev/null
+++ b/vendor/leafo/lessphp/plessc
@@ -0,0 +1,250 @@
+#!/usr/bin/env php
+<?php
+// Command line utility to compile LESS to STDOUT
+// Leaf Corcoran <leafot@gmail.com>, 2013
+
+$exe = array_shift($argv); // remove filename
+
+$HELP = <<<EOT
+Usage: $exe [options] input-file [output-file]
+
+Options include:
+
+    -h, --help  Show this message
+    -v          Print the version
+    -f=format   Set the output format, includes "default", "compressed"
+    -c          Keep /* */ comments in output
+    -r          Read from STDIN instead of input-file
+    -w          Watch input-file, and compile to output-file if it is changed
+    -T          Dump formatted parse tree
+    -X          Dump raw parse tree
+
+
+EOT;
+
+$opts = getopt('hvrwncXTf:', array('help'));
+while (count($argv) > 0 && preg_match('/^-([-hvrwncXT]$|[f]=)/', $argv[0])) {
+	array_shift($argv);
+}
+
+function has() {
+	global $opts;
+	foreach (func_get_args() as $arg) {
+		if (isset($opts[$arg])) return true;
+	}
+	return false;
+}
+
+if (has("h", "help")) {
+	exit($HELP);
+}
+
+error_reporting(E_ALL);
+$path  = realpath(dirname(__FILE__)).'/';
+
+require $path."lessc.inc.php";
+
+$VERSION = lessc::$VERSION;
+
+$fa = "Fatal Error: ";
+function err($msg) {
+	fwrite(STDERR, $msg."\n");
+}
+
+if (php_sapi_name() != "cli") {
+	err($fa.$argv[0]." must be run in the command line.");
+	exit(1);
+}
+
+function make_less($fname = null) {
+	global $opts;
+	$l = new lessc($fname);
+
+	if (has("f")) {
+		$format = $opts["f"];
+		if ($format != "default") $l->setFormatter($format);
+	}
+
+	if (has("c")) {
+		$l->setPreserveComments(true);
+	}
+
+	return $l;
+}
+
+function process($data, $import = null) {
+	global $fa;
+
+	$l = make_less();
+	if ($import) $l->importDir = $import;
+
+	try {
+		echo $l->parse($data);
+		exit(0);
+	} catch (exception $ex) {
+		err($fa."\n".str_repeat('=', 20)."\n".
+			$ex->getMessage());
+		exit(1);
+	}
+}
+
+if (has("v")) {
+	exit($VERSION."\n");
+}
+
+if (has("r")) {
+	if (!empty($argv)) {
+		$data = $argv[0];
+	} else {
+		$data = "";
+		while (!feof(STDIN)) {
+			$data .= fread(STDIN, 8192);
+		}
+	}
+	exit(process($data));
+}
+
+if (has("w")) {
+	// need two files
+	if (!is_file($in = array_shift($argv)) ||
+		null == $out = array_shift($argv))
+	{
+		err($fa.$exe." -w infile outfile");
+		exit(1);
+	}
+
+	echo "Watching ".$in.
+		(has("n") ? ' with notifications' : '').
+		", press Ctrl + c to exit.\n";
+
+	$cache = $in;
+	$last_action = 0;
+	while (true) {
+		clearstatcache();
+
+		// check if anything has changed since last fail
+		$updated = false;
+		if (is_array($cache)) {
+			foreach ($cache['files'] as $fname=>$_) {
+				if (filemtime($fname) > $last_action) {
+					$updated = true;
+					break;
+				}
+			}
+		} else $updated = true;
+
+		// try to compile it
+		if ($updated) {
+			$last_action = time();
+
+			try {
+				$cache = lessc::cexecute($cache);
+				echo "Writing updated file: ".$out."\n";
+				if (!file_put_contents($out, $cache['compiled'])) {
+					err($fa."Could not write to file ".$out);
+					exit(1);
+				}
+			} catch (exception $ex) {
+				echo "\nFatal Error:\n".str_repeat('=', 20)."\n".
+					$ex->getMessage()."\n\n";
+
+				if (has("n")) {
+					`notify-send -u critical "compile failed" "{$ex->getMessage()}"`;
+				}
+			}
+		}
+
+		sleep(1);
+	}
+	exit(0);
+}
+
+if (!$fname = array_shift($argv)) {
+	echo $HELP;
+	exit(1);
+}
+
+function dumpValue($node, $depth = 0) {
+	if (is_object($node)) {
+		$indent = str_repeat("  ", $depth);
+		$out = array();
+		foreach ($node->props as $prop) {
+			$out[] = $indent . dumpValue($prop, $depth + 1);
+		}
+		$out = implode("\n", $out);
+		if (!empty($node->tags)) {
+			$out = "+ ".implode(", ", $node->tags)."\n".$out;
+		}
+		return $out;
+	} elseif (is_array($node)) {
+		if (empty($node)) return "[]";
+		$type = $node[0];
+		if ($type == "block")
+			return dumpValue($node[1], $depth);
+
+		$out = array();
+		foreach ($node as $value) {
+			$out[] = dumpValue($value, $depth);
+		}
+		return "{ ".implode(", ", $out)." }";
+	} else {
+		if (is_string($node) && preg_match("/[\s,]/", $node)) {
+			return '"'.$node.'"';
+		}
+		return $node; // normal value
+	}
+}
+
+
+function stripValue($o, $toStrip) {
+	if (is_array($o) || is_object($o)) {
+		$isObject = is_object($o);
+		$o = (array)$o;
+		foreach ($toStrip as $removeKey) {
+			if (!empty($o[$removeKey])) {
+				$o[$removeKey] = "*stripped*";
+			}
+		}
+
+		foreach ($o as $k => $v) {
+			$o[$k] = stripValue($v, $toStrip);
+		}
+
+		if ($isObject) {
+			$o = (object)$o;
+		}
+	}
+
+	return $o;
+}
+
+function dumpWithoutParent($o, $alsoStrip=array()) {
+	$toStrip = array_merge(array("parent"), $alsoStrip);
+	print_r(stripValue($o, $toStrip));
+}
+
+try {
+	$less = make_less($fname);
+	if (has("T", "X")) {
+		$parser = new lessc_parser($less, $fname);
+		$tree = $parser->parse(file_get_contents($fname));
+		if (has("X"))
+			$out = print_r($tree, 1);
+		else
+			$out = dumpValue($tree)."\n";
+	} else {
+		$out = $less->parse();
+	}
+
+	if (!$fout = array_shift($argv)) {
+		echo $out;
+	} else {
+		file_put_contents($fout, $out);
+	}
+
+} catch (exception $ex) {
+	err($fa.$ex->getMessage());
+	exit(1);
+}
+
+?>
diff --git a/vendor/leafo/lessphp/tests/ApiTest.php b/vendor/leafo/lessphp/tests/ApiTest.php
new file mode 100644
index 00000000..fe1bbffa
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/ApiTest.php
@@ -0,0 +1,196 @@
+<?php
+
+require_once __DIR__ . "/../lessc.inc.php";
+
+class ApiTest extends PHPUnit_Framework_TestCase {
+	public function setUp() {
+		$this->less = new lessc();
+		$this->less->importDir = array(__DIR__ . "/inputs/test-imports");
+	}
+
+	public function testPreserveComments() {
+		$input = <<<EOD
+// what is going on?
+
+/** what the heck **/
+
+/**
+
+Here is a block comment
+
+**/
+
+
+// this is a comment
+
+/*hello*/div /*yeah*/ { //surew
+	border: 1px solid red; // world
+	/* comment above the first occurrence of a duplicated rule */
+	color: url('http://mage-page.com');
+	string: "hello /* this is not a comment */";
+	world: "// neither is this";
+	/* comment above the second occurrence of a duplicated rule */
+	color: url('http://mage-page.com');
+	string: 'hello /* this is not a comment */' /*what if this is a comment */;
+	world: '// neither is this' // hell world;
+	;
+	/* duplicate comments are retained */
+	/* duplicate comments are retained */
+	what-ever: 100px;
+	background: url(/*this is not a comment?*/); // uhh what happens here
+}
+EOD;
+
+
+		$outputWithComments = <<<EOD
+/** what the heck **/
+/**
+
+Here is a block comment
+
+**/
+/*hello*/
+/*yeah*/
+div /*yeah*/ {
+  border: 1px solid red;
+  /* comment above the first occurrence of a duplicated rule */
+  /* comment above the second occurrence of a duplicated rule */
+  color: url('http://mage-page.com');
+  string: "hello /* this is not a comment */";
+  world: "// neither is this";
+  /*what if this is a comment */
+  string: 'hello /* this is not a comment */';
+  world: '// neither is this';
+  /* duplicate comments are retained */
+  /* duplicate comments are retained */
+  what-ever: 100px;
+  /*this is not a comment?*/
+  background: url();
+}
+EOD;
+
+		$outputWithoutComments = <<<EOD
+div {
+  border: 1px solid red;
+  color: url('http://mage-page.com');
+  string: "hello /* this is not a comment */";
+  world: "// neither is this";
+  string: 'hello /* this is not a comment */';
+  world: '// neither is this';
+  what-ever: 100px;
+  background: url(/*this is not a comment?*/);
+}
+EOD;
+
+		$this->assertEquals($this->compile($input), trim($outputWithoutComments));
+		$this->less->setPreserveComments(true);
+		$this->assertEquals($this->compile($input), trim($outputWithComments));
+	}
+
+	public function testOldInterface() {
+		$this->less = new lessc(__DIR__ . "/inputs/hi.less");
+		$out = $this->less->parse(array("hello" => "10px"));
+		$this->assertEquals(trim($out), trim('
+div:before {
+  content: "hi!";
+}'));
+
+	}
+
+	public function testInjectVars() {
+		$out = $this->less->parse(".magic { color: @color;  width: @base - 200; }",
+			array(
+				'color' => 'red',
+				'base' => '960px'
+			));
+
+		$this->assertEquals(trim($out), trim("
+.magic {
+  color: red;
+  width: 760px;
+}"));
+
+	}
+
+	public function testDisableImport() {
+		$this->less->importDisabled = true;
+		$this->assertEquals(
+			"/* import disabled */",
+			$this->compile("@import 'file3';"));
+	}
+
+	public function testUserFunction() {
+		$this->less->registerFunction("add-two", function($list) {
+			list($a, $b) = $list[2];
+			return $a[1] + $b[1];
+		});
+
+		$this->assertEquals(
+			$this->compile("result: add-two(10, 20);"),
+			"result: 30;");
+
+		return $this->less;
+	}
+
+	/**
+	 * @depends testUserFunction
+	 */
+	public function testUnregisterFunction($less) {
+		$less->unregisterFunction("add-two");
+
+		$this->assertEquals(
+			$this->compile("result: add-two(10, 20);"),
+			"result: add-two(10,20);");
+	}
+
+
+
+	public function testFormatters() {
+		$src = "
+			div, pre {
+				color: blue;
+				span, .big, hello.world {
+					height: 20px;
+					color:#ffffff + #000;
+				}
+			}";
+
+		$this->less->setFormatter("compressed");
+		$this->assertEquals(
+			$this->compile($src), "div,pre{color:blue;}div span,div .big,div hello.world,pre span,pre .big,pre hello.world{height:20px;color:#fff;}");
+
+		// TODO: fix the output order of tags
+		$this->less->setFormatter("lessjs");
+		$this->assertEquals(
+			$this->compile($src),
+"div,
+pre {
+  color: blue;
+}
+div span,
+div .big,
+div hello.world,
+pre span,
+pre .big,
+pre hello.world {
+  height: 20px;
+  color: #ffffff;
+}");
+
+		$this->less->setFormatter("classic");
+		$this->assertEquals(
+			$this->compile($src),
+trim("div, pre { color:blue; }
+div span, div .big, div hello.world, pre span, pre .big, pre hello.world {
+  height:20px;
+  color:#ffffff;
+}
+"));
+
+	}
+
+	public function compile($str) {
+		return trim($this->less->parse($str));
+	}
+
+}
diff --git a/vendor/leafo/lessphp/tests/ErrorHandlingTest.php b/vendor/leafo/lessphp/tests/ErrorHandlingTest.php
new file mode 100644
index 00000000..de02f065
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/ErrorHandlingTest.php
@@ -0,0 +1,81 @@
+<?php
+require_once __DIR__ . "/../lessc.inc.php";
+
+class ErrorHandlingTest extends PHPUnit_Framework_TestCase {
+	public function setUp() {
+		$this->less = new lessc();
+	}
+
+	public function compile() {
+		$source = join("\n", func_get_args());
+		return $this->less->compile($source);
+	}
+
+	/**
+	 * @expectedException        Exception
+	 * @expectedExceptionMessage .parametric-mixin is undefined
+	 */
+	public function testRequiredParametersMissing() {
+		$this->compile(
+			'.parametric-mixin (@a, @b) { a: @a; b: @b; }',
+			'.selector { .parametric-mixin(12px); }'
+		);
+	}
+
+	/**
+	 * @expectedException        Exception
+	 * @expectedExceptionMessage .parametric-mixin is undefined
+	 */
+	public function testTooManyParameters() {
+		$this->compile(
+			'.parametric-mixin (@a, @b) { a: @a; b: @b; }',
+			'.selector { .parametric-mixin(12px, 13px, 14px); }'
+		);
+	}
+
+	/**
+	 * @expectedException        Exception
+	 * @expectedExceptionMessage unrecognised input
+	 */
+	public function testRequiredArgumentsMissing() {
+		$this->compile('.selector { rule: e(); }');
+	}
+
+	/**
+	 * @expectedException        Exception
+	 * @expectedExceptionMessage variable @missing is undefined
+	 */
+	public function testVariableMissing() {
+		$this->compile('.selector { rule: @missing; }');
+	}
+
+	/**
+	 * @expectedException        Exception
+	 * @expectedExceptionMessage .missing-mixin is undefined
+	 */
+	public function testMixinMissing() {
+		$this->compile('.selector { .missing-mixin; }');
+	}
+
+	/**
+	 * @expectedException        Exception
+	 * @expectedExceptionMessage .flipped is undefined
+	 */
+	public function testGuardUnmatchedValue() {
+		$this->compile(
+			'.flipped(@x) when (@x =< 10) { rule: value; }',
+			'.selector { .flipped(12); }'
+		);
+	}
+
+	/**
+	 * @expectedException        Exception
+	 * @expectedExceptionMessage .colors-only is undefined
+	 */
+	public function testGuardUnmatchedType() {
+		$this->compile(
+			'.colors-only(@x) when (iscolor(@x)) { rule: value; }',
+			'.selector { .colors-only("string value"); }'
+		);
+	}
+}
diff --git a/vendor/leafo/lessphp/tests/InputTest.php b/vendor/leafo/lessphp/tests/InputTest.php
new file mode 100644
index 00000000..32db95bc
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/InputTest.php
@@ -0,0 +1,89 @@
+<?php
+
+require_once __DIR__ . "/../lessc.inc.php";
+
+// Runs all the tests in inputs/ and compares their output to ouputs/
+
+function _dump($value) {
+	fwrite(STDOUT, print_r($value, true));
+}
+
+function _quote($str) {
+	return preg_quote($str, "/");
+}
+
+class InputTest extends PHPUnit_Framework_TestCase {
+	protected static $importDirs = array("inputs/test-imports");
+
+	protected static $testDirs = array(
+		"inputs" => "outputs",
+		"inputs_lessjs" => "outputs_lessjs",
+	);
+
+	public function setUp() {
+		$this->less = new lessc();
+		$this->less->importDir = array_map(function($path) {
+			return __DIR__ . "/" . $path;
+		}, self::$importDirs);
+	}
+
+	/**
+	 * @dataProvider fileNameProvider
+	 */
+	public function testInputFile($inFname) {
+		if ($pattern = getenv("BUILD")) {
+			return $this->buildInput($inFname);
+		}
+
+		$outFname = self::outputNameFor($inFname);
+
+		if (!is_readable($outFname)) {
+			$this->fail("$outFname is missing, ".
+				"consider building tests with BUILD=true");
+		}
+
+		$input = file_get_contents($inFname);
+		$output = file_get_contents($outFname);
+
+		$this->assertEquals($output, $this->less->parse($input));
+	}
+
+	public function fileNameProvider() {
+		return array_map(function($a) { return array($a); },
+			self::findInputNames());
+	}
+
+	// only run when env is set
+	public function buildInput($inFname) {
+		$css = $this->less->parse(file_get_contents($inFname));
+		file_put_contents(self::outputNameFor($inFname), $css);
+	}
+
+	static public function findInputNames($pattern="*.less") {
+		$files = array();
+		foreach (self::$testDirs as $inputDir => $outputDir) {
+			$files = array_merge($files, glob(__DIR__ . "/" . $inputDir . "/" . $pattern));
+		}
+
+		return array_filter($files, "is_file");
+	}
+
+	static public function outputNameFor($input) {
+		$front = _quote(__DIR__ . "/");
+		$out = preg_replace("/^$front/", "", $input);
+
+		foreach (self::$testDirs as $inputDir => $outputDir) {
+			$in = _quote($inputDir . "/");
+			$rewritten = preg_replace("/$in/", $outputDir . "/", $out);
+			if ($rewritten != $out) {
+				$out = $rewritten;
+				break;
+			}
+		}
+
+		$out = preg_replace("/.less$/", ".css", $out);
+
+		return __DIR__ . "/" . $out;
+	}
+}
+
diff --git a/vendor/leafo/lessphp/tests/README.md b/vendor/leafo/lessphp/tests/README.md
new file mode 100644
index 00000000..85a75c05
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/README.md
@@ -0,0 +1,24 @@
+lessphp uses [phpunit](https://github.com/sebastianbergmann/phpunit/) for its tests
+
+* `InputTest.php` iterates through all the less files in `inputs/`, compiles
+  them, then compares the result with the respective file in `outputs/`.
+
+* `ApiTest.php` tests the behavior of lessphp's public API methods.
+
+* `ErrorHandlingTest.php` tests that lessphp throws appropriate errors when
+  given invalid LESS as input.
+
+From the root you can run `make` to run all the tests.
+
+## lessjs tests
+
+Tests found in `inputs_lessjs` are extracted directly from
+[less.js](https://github.com/less/less.js). The following license applies to
+those tests: https://github.com/less/less.js/blob/master/LICENSE
+
+## bootstrap.sh
+
+Clones twitter bootsrap, compiles it with lessc and lessphp, cleans up results
+with sort.php, and outputs diff. To run it, you need to have git and lessc
+installed.
+
diff --git a/vendor/leafo/lessphp/tests/bootstrap.sh b/vendor/leafo/lessphp/tests/bootstrap.sh
new file mode 100644
index 00000000..18a90e87
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/bootstrap.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+
+echo "This script clones Twitter Bootstrap, compiles it with lessc and lessphp,"
+echo "cleans up results with sort.php, and outputs diff. To run it, you need to"
+echo "have git and lessc installed."
+echo ""
+
+if [ -z "$input" ]; then
+  input="bootstrap/less/bootstrap.less"
+fi
+dest=$(basename "$input")
+dest="${dest%.*}"
+
+if [ -z "$@" ]; then
+  diff_tool="diff -b -u -t -B"
+else
+  diff_tool=$@
+fi
+
+mkdir -p tmp
+
+if [ ! -d 'bootstrap/' ]; then
+  echo ">> Cloning bootstrap to bootstrap/"
+  git clone https://github.com/twbs/bootstrap
+fi
+
+echo ">> lessc compilation ($input)"
+lessc "$input" "tmp/$dest.lessc.css"
+
+echo ">> lessphp compilation ($input)"
+../plessc "$input" "tmp/$dest.lessphp.css"
+echo ">> Cleanup and convert"
+
+php sort.php "tmp/$dest.lessc.css" > "tmp/$dest.lessc.clean.css"
+php sort.php "tmp/$dest.lessphp.css" > "tmp/$dest.lessphp.clean.css"
+
+echo ">> Doing diff"
+$diff_tool "tmp/$dest.lessc.clean.css" "tmp/$dest.lessphp.clean.css"
diff --git a/vendor/leafo/lessphp/tests/inputs/accessors.less.disable b/vendor/leafo/lessphp/tests/inputs/accessors.less.disable
new file mode 100644
index 00000000..2990faab
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/accessors.less.disable
@@ -0,0 +1,36 @@
+/* accessors */
+
+#defaults {
+	@width: 960px;
+	@color: black;
+	.something {
+		@space: 10px;
+		@hello {
+			color: green;
+		}
+	}
+}
+
+.article { color: #294366; }
+
+.comment {
+	width: #defaults[@width];
+	color: .article['color'];
+	padding: #defaults > .something[@space];
+}
+
+.wow {
+	height: .comment['width'];
+	background-color: .comment['color'];
+	color: #defaults > .something > @hello['color'];
+
+	padding: #defaults > non-existant['padding'];
+	margin: #defaults > .something['non-existant'];
+}
+
+.mix {
+	#defaults;
+	font-size: .something[@space];
+}
+
+
diff --git a/vendor/leafo/lessphp/tests/inputs/arity.less b/vendor/leafo/lessphp/tests/inputs/arity.less
new file mode 100644
index 00000000..9998fd4a
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/arity.less
@@ -0,0 +1,77 @@
+
+// simple arity
+
+.hello(@a) {
+	hello: one;
+}
+
+.hello(@a, @b) {
+	hello: two;
+}
+
+.hello(@a, @b, @c) {
+	hello: three;
+}
+
+
+.world(@a, @b, @c) {
+	world: three;
+}
+
+.world(@a, @b) {
+	world: two;
+}
+
+.world(@a) {
+	world: one;
+}
+
+.one {
+	.hello(1);
+	.world(1);
+}
+
+.two {
+	.hello(1, 1);
+	.world(1, 1);
+}
+
+.three {
+	.hello(1, 1, 1);
+	.world(1, 1, 1);
+}
+
+
+// arity with default values
+
+.foo(@a, @b: cool) {
+	foo: two @b;
+}
+
+.foo(@a, @b: cool, @c: yeah) {
+	foo: three @b @c;
+}
+
+
+.baz(@a, @b, @c: yeah) {
+	baz: three @c;
+}
+
+.baz(@a, @b: cool) {
+	baz: two @b;
+}
+
+
+.multi-foo {
+	.foo(1);
+	.foo(1, 1);
+	.foo(1,1,1);
+}
+
+.multi-baz {
+	.baz(1);
+	.baz(1, 1);
+	.baz(1,1,1);
+}
+
+
diff --git a/vendor/leafo/lessphp/tests/inputs/attributes.less b/vendor/leafo/lessphp/tests/inputs/attributes.less
new file mode 100644
index 00000000..7ede4fc4
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/attributes.less
@@ -0,0 +1,41 @@
+* { color: blue; }
+E { color: blue; }
+E[foo] { color: blue; }
+[foo] { color: blue; }
+[foo] .helloWorld { color: blue; }
+[foo].helloWorld { color: blue; }
+E[foo="barbar"] { color: blue; }
+E[foo~="hello#$@%@$#^"] { color: blue; }
+E[foo^="color: green;"] { color: blue; }
+E[foo$="239023"] { color: blue; }
+E[foo*="29302"] { color: blue; }
+E[foo|="239032"] { color: blue; }
+E:root { color: blue; }
+
+E:nth-child(odd) { color: blue; }
+E:nth-child(2n+1) { color: blue; }
+E:nth-child(5) { color: blue; }
+E:nth-last-child(-n+2) { color: blue; }
+E:nth-of-type(2n) { color: blue; }
+E:nth-last-of-type(n) { color: blue; }
+
+E:first-child { color: blue; }
+E:last-child { color: blue; }
+E:first-of-type { color: blue; }
+E:last-of-type { color: blue; }
+E:only-child { color: blue; }
+E:only-of-type { color: blue; }
+E:empty { color: blue; }
+
+E:lang(en) { color: blue; }
+E::first-line { color: blue; }
+E::before { color: blue; }
+
+E#id { color: blue; }
+E:not(:link) { color: blue; }
+
+E F { color: blue; }
+E > F { color: blue; }
+E + F { color: blue; }
+E ~ F { color: blue; }
+
diff --git a/vendor/leafo/lessphp/tests/inputs/builtins.less b/vendor/leafo/lessphp/tests/inputs/builtins.less
new file mode 100644
index 00000000..f9301e04
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/builtins.less
@@ -0,0 +1,96 @@
+// builtin
+
+@something: "hello world";
+@color: #112233;
+@color2: rgba(44,55,66, .6);
+
+body {
+	color: @something;
+
+	@num: 7 / 6;
+	num-basic: @num + 4;
+	num-floor: floor(@num) + 4px;
+	num-ceil: ceil(@num) + 4px;
+
+	@num2: 2 / 3;
+	num2: @num2;
+	num2-round: round(@num2);
+	num2-floor: floor(@num2);
+	num2-ceil: ceil(@num2);
+
+	round-lit: round(10px / 3);
+
+	rgba1: rgbahex(@color);
+	rgba2: rgbahex(@color2);
+	argb: argb(@color2);
+}
+
+
+format {
+  @r: 32;
+  format: %("rgb(%d, %d, %d)", @r, 128, 64);
+  format-string: %("hello %s", "world");
+  format-multiple: %("hello %s %d", "earth", 2);
+  format-url-encode: %('red is %A', #ff0000);
+  eformat: e(%("rgb(%d, %d, %d)", @r, 128, 64));
+}
+
+
+#functions {
+	str1: isstring("hello");
+	str2: isstring(one, two);
+
+	num1: isnumber(2323px);
+	num2: isnumber(2323);
+	num3: isnumber(4/5);
+	num4: isnumber("hello");
+
+	col1: iscolor(red);
+	col2: iscolor(hello);
+	col3: iscolor(rgba(0,0,0,0.3));
+	col4: iscolor(#fff);
+
+	key1: iskeyword(hello);
+	key2: iskeyword(3D);
+
+	px1: ispixel(10px);
+	px2: ispixel(10);
+
+	per1: ispercentage(10%);
+	per2: ispercentage(10);
+
+	em1: isem(10em);
+	em2: isem(10);
+
+	ex1: extract(1 2 3 4, 2);
+	ex2: extract(1 2, 1);
+	ex3: extract(1, 1);
+
+	@list: 1,2,3,4;
+
+	ex4: extract(@list, 2);
+
+	pow: pow(2,4);
+	pi: pi();
+	mod: mod(14,10);
+
+	tan: tan(1);
+	cos: cos(1);
+	sin: sin(1);
+
+	atan: atan(1);
+	acos: acos(1);
+	asin: asin(1);
+
+	sqrt: sqrt(8);
+}
+
+
+#unit {
+	@unit: "em";
+	unit-lit: unit(10px);
+	unit-arg: unit(10px, "s");
+	unit-arg2: unit(10px, @unit);
+	unit-math: unit(0.07407s) * 100%;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/colors.less b/vendor/leafo/lessphp/tests/inputs/colors.less
new file mode 100644
index 00000000..7fd47a3c
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/colors.less
@@ -0,0 +1,154 @@
+
+body {
+	color:rgb(red(#f00), red(#0F0), red(#00f));
+	color:rgb(red(#f00), green(#0F0), blue(#00f));
+	color:rgb(red(#0ff), green(#f0f), blue(#ff0));
+
+	color: hsl(34, 50%, 40%);
+	color: hsla(34, 50%, 40%, 0.3);
+
+	lighten1: lighten(#efefef, 10%);
+	lighten2: lighten(rgb(23, 53, 231), 22%);
+	lighten3: lighten(rgba(212, 103, 88, 0.5), 10%);
+
+	darken1: darken(#efefef, 10%);
+	darken2: darken(rgb(23, 53, 231), 22%);
+	darken3: darken(rgba(23, 53, 231, 0.5), 10%);
+
+	saturate1: saturate(#efefef, 10%);
+	saturate2: saturate(rgb(23, 53, 231), 22%);
+	saturate3: saturate(rgba(23, 53, 231, 0.5), 10%);
+
+	desaturate1: desaturate(#efefef, 10%);
+	desaturate2: desaturate(rgb(23, 53, 231), 22%);
+	desaturate3: desaturate(rgba(23, 53, 231, 0.5), 10%);
+
+	spin1: spin(#efefef, 12);
+	spin2: spin(rgb(23, 53, 231), 15);
+	spin3: spin(rgba(23, 53, 231, 0.5), 19);
+
+	spin2: spin(#efefef, -12);
+	spin3: spin(rgb(23, 53, 231), -15);
+	spin4: spin(rgba(23, 53, 231, 0.5), -19);
+
+	one1: fadein(#abcdef, 10%);
+	one2: fadeout(#abcdef, -10%);
+
+	two1: fadeout(#029f23, 10%);
+	two2: fadein(#029f23, -10%);
+
+
+	three1: fadein(rgba(1,2,3, 0.5), 10%);
+	three2: fadeout(rgba(1,2,3, 0.5), -10%);
+
+	four1: fadeout(rgba(1,2,3, 0), 10%);
+	four2: fadein(rgba(1,2,3, 0), -10%);
+
+	hue: hue(rgb(34,20,40));
+	sat: saturation(rgb(34,20,40));
+	lit: lightness(rgb(34,20,40));
+
+	@old: #34fa03;
+	@new: hsl(hue(@old), 45%, 90%);
+	what: @new;
+
+	zero1: saturate(#123456, -100%);
+	zero2: saturate(#123456, 100%);
+	zero3: saturate(#000000, 100%);
+	zero4: saturate(#ffffff, 100%);
+
+	zero5: lighten(#123456, -100%);
+	zero6: lighten(#123456, 100%);
+	zero7: lighten(#000000, 100%);
+	zero8: lighten(#ffffff, 100%);
+
+	zero9: spin(#123456, -100);
+	zeroa: spin(#123456, 100);
+	zerob: spin(#000000, 100);
+	zeroc: spin(#ffffff, 100);
+}
+
+
+alpha {
+	// g: alpha(red);
+	g1: alpha(rgba(0,0,0,0));
+	g2: alpha(rgb(155,55,0));
+}
+
+fade {
+	f1: fade(red, 50%);
+	f2: fade(#fff, 20%);
+	f3: fade(rgba(34,23,64,0.4), 50%);
+}
+
+@a: rgb(255,255,255);
+@b: rgb(0,0,0);
+
+.mix {
+	color1: mix(@a, @b, 50%);
+	color2: mix(@a, @b);
+	color3: mix(rgba(5,3,1,0.3), rgba(6,3,2, 0.8), 50%);
+}
+
+.contrast {
+	color1: contrast(#000, red, blue);
+	color2: contrast(#fff, red, blue);
+}
+
+.percent {
+	per: percentage(0.5);
+}
+
+// color keywords
+
+.colorz {
+	color1: whitesmoke - 10;
+	color2: spin(red, 34);
+	color3: spin(blah);
+}
+
+
+
+// purposfuly whacky to match less.js
+
+@color: #fcf8e3;
+
+body {
+	start: @color;
+	spin: spin(@color, -10); // #fcf4e3
+	chained: darken(spin(@color, -10), 3%); // gives #fbeed5, should be #fbefd5
+	direct: darken(#fcf4e3, 3%); // #fbefd5
+}
+
+// spin around
+pre {
+	@errorBackground: #f2dede;
+	spin: spin(@errorBackground, -10);
+}
+
+dd {
+	@white: #fff;
+	background-color: mix(@white, darken(@white, 10%), 60%);
+}
+
+// math
+
+.ops {
+	c1: red * 0.3;
+	c2: green / 2;
+	c3: purple % 7;
+	c4: 4 * salmon;
+	c5: 1 + salmon;
+
+	c6: 132 / red;
+	c7: 132 - red;
+	c8: 132- red;
+}
+
+.transparent {
+	r: red(transparent);
+	g: green(transparent);
+	b: blue(transparent);
+	a: alpha(transparent);
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/compile_on_mixin.less b/vendor/leafo/lessphp/tests/inputs/compile_on_mixin.less
new file mode 100644
index 00000000..79d628f4
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/compile_on_mixin.less
@@ -0,0 +1,39 @@
+
+@mixin {
+	height: 22px;
+	ul {
+		height: 20px;
+		li {
+			@color: red;
+			height: 10px;
+			div span, link {
+				margin: 10px;
+				color: @color;
+			}
+		}
+
+		div, p {
+			border: 1px;
+			&.hello {
+				color: green;
+			}
+
+			:what {
+				color: blue;
+			}
+		}
+
+
+		a {
+			b {
+				color: blue;
+			}
+		}
+	}
+}
+
+
+
+body {
+	@mixin;
+}
diff --git a/vendor/leafo/lessphp/tests/inputs/data-uri.less b/vendor/leafo/lessphp/tests/inputs/data-uri.less
new file mode 100644
index 00000000..0cfa941a
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/data-uri.less
@@ -0,0 +1,7 @@
+.small {
+	background: data-uri("../hi.less");
+}
+
+.large {
+	background: data-uri('../../../lessc.inc.php');
+}
diff --git a/vendor/leafo/lessphp/tests/inputs/directives.less b/vendor/leafo/lessphp/tests/inputs/directives.less
new file mode 100644
index 00000000..1b3a9b58
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/directives.less
@@ -0,0 +1,28 @@
+
+@hello: "utf-8";
+@charset @hello;
+
+@-moz-document url-prefix(){
+	div {
+		color: red;
+	}
+}
+
+@page :left { margin-left: 4cm; }
+@page :right { margin-left: 3cm; }
+@page { margin: 2cm }
+
+@-ms-viewport {
+    width: device-width;
+}
+@-moz-viewport {
+    width: device-width;
+}
+@-o-viewport {
+    width: device-width;
+}
+@viewport {
+    width: device-width;
+}
+
+
diff --git a/vendor/leafo/lessphp/tests/inputs/escape.less b/vendor/leafo/lessphp/tests/inputs/escape.less
new file mode 100644
index 00000000..5c15e786
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/escape.less
@@ -0,0 +1,18 @@
+
+body {
+	@hello: "world";
+	e1: e("this is simple");
+	e2: e("this is simple", "cool lad");
+	e3: e(1232);
+	e4: e(@hello);
+	e5: e("one" + 'more');
+
+	t1: ~"eating rice";
+	t2: ~"string cheese";
+	t3: a b c ~"string me" d e f;
+	t4: ~"string @{hello}";
+}
+
+.class {
+	filter: ~"progid:DXImageTransform.Microsoft.AlphaImageLoader(src='image.png')";
+}
diff --git a/vendor/leafo/lessphp/tests/inputs/font_family.less b/vendor/leafo/lessphp/tests/inputs/font_family.less
new file mode 100644
index 00000000..d1dfb72d
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/font_family.less
@@ -0,0 +1,28 @@
+
+@font-directory: 'fonts/';
+@some-family: Gentium;
+
+@font-face: maroon; // won't collide with @font-face { }
+
+@font-face {
+	font-family: Graublau Sans Web;
+	src: url(@{font-directory}GraublauWeb.otf) format("opentype");
+}
+
+@font-face {
+  font-family: @some-family;
+  src: url('@{font-directory}Gentium.ttf');
+}
+
+@font-face {
+  font-family: @some-family;
+  src: url("@{font-directory}GentiumItalic.ttf");
+  font-style: italic;
+}
+
+h2 {
+	font-family: @some-family;
+	crazy: @font-face;
+}
+
+
diff --git a/vendor/leafo/lessphp/tests/inputs/guards.less b/vendor/leafo/lessphp/tests/inputs/guards.less
new file mode 100644
index 00000000..fc4e344e
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/guards.less
@@ -0,0 +1,74 @@
+
+.simple(@hi) when (@hi) {
+	simple: yellow;
+}
+
+
+.something(@hi) when (@hi = cool) {
+	something: red;
+}
+
+.another(@x) when (@x > 10) {
+	another: green;
+}
+
+
+.flipped(@x) when (@x =< 10) {
+	flipped: teal;
+}
+
+.yeah(@arg) when (isnumber(@arg)) {
+	yeah-number: purple @arg;
+}
+
+
+.yeah(@arg) when (ispixel(@arg)) {
+	yeah-pixel: silver;
+}
+
+
+.hello(@arg) when not (@arg) {
+	hello: orange;
+}
+
+dd {
+	.simple(true);
+}
+
+b {
+	.something(cool);
+	.something(birthday);
+}
+
+img {
+	.another(12);
+	.flipped(2);
+}
+
+body {
+	.yeah(232px);
+	.yeah(232);
+}
+
+.something(@x) when (@x) and (@y), not (@x = what) {
+	something-complex: blue @x;
+}
+
+div {
+	@y: true;
+	.something(true);
+
+}
+
+.coloras(@g) when (iscolor(@g)) {
+	color: true @g;
+}
+
+link {
+	.coloras(red);
+	.coloras(#fff);
+	.coloras(#fffddd);
+	.coloras(rgb(0,0,0));
+	.coloras(rgba(0,0,0, .34));
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/hacks.less b/vendor/leafo/lessphp/tests/inputs/hacks.less
new file mode 100644
index 00000000..e69b7bf9
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/hacks.less
@@ -0,0 +1,6 @@
+// css hacks
+
+:root .alert-message, :root .btn {
+	border-radius: 0 \0;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/hi.less b/vendor/leafo/lessphp/tests/inputs/hi.less
new file mode 100644
index 00000000..9a3d8198
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/hi.less
@@ -0,0 +1,5 @@
+
+div:before {
+	content: "hi!";
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/ie.less b/vendor/leafo/lessphp/tests/inputs/ie.less
new file mode 100644
index 00000000..37a5f1f6
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/ie.less
@@ -0,0 +1,12 @@
+
+foo {
+	filter: progid:DXImageTransform.Microsoft.gradient(GradientType=1, startColorstr=#c0ff3300, endColorstr=#ff000000);
+	filter:progid:DXImageTransform.Microsoft.gradient(GradientType=1, startColorstr=#c0ff3300, endColorstr=#ff000001);
+}
+
+
+foo {
+	filter: alpha(opacity=20);
+	filter: alpha(opacity=20, enabled=true);
+	filter: blaznicate(foo=bar, baz=bang bip, bart=#fa4600);
+}
diff --git a/vendor/leafo/lessphp/tests/inputs/import.less b/vendor/leafo/lessphp/tests/inputs/import.less
new file mode 100644
index 00000000..a5005674
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/import.less
@@ -0,0 +1,56 @@
+
+@import 'file1.less'; // file found and imported
+
+@import "not-found";
+
+@import "something.css" media;
+@import url("something.css") media;
+@import url(something.css) media, screen, print;
+
+@color: maroon;
+
+@import url(file2); // found and imported
+
+body {
+	line-height: 10em;
+	@colors;
+}
+
+div {
+	@color: fuchsia;
+	@import "file2";
+}
+
+
+.mixin-import() {
+	@import "file3";
+}
+
+.one {
+	.mixin-import();
+	color: blue;
+}
+
+.two {
+	.mixin-import();
+}
+
+
+#merge-import-mixins {
+	@import "a";
+	@import "b";
+	div { .just-a-class; }
+}
+
+
+@import "inner/file1";
+
+
+// test bubbling variables up from imports, while preserving order
+
+pre {
+	color: @someValue;
+}
+
+@import "file3";
+
diff --git a/vendor/leafo/lessphp/tests/inputs/interpolation.less b/vendor/leafo/lessphp/tests/inputs/interpolation.less
new file mode 100644
index 00000000..8aad0004
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/interpolation.less
@@ -0,0 +1,47 @@
+
+@cool-hello: "yes";
+@cool-yes: "okay";
+@var: "hello";
+
+div {
+	interp1: ~"@{cool-hello}";
+	interp2: ~"@{cool-@{var}}";
+	interp3: ~"@{cool-@{cool-@{var}}}";
+}
+
+// interpolation in selectors
+
+@hello: 10;
+@world: "yeah";
+
+@{hello}@{world} {
+	color: blue;
+}
+
+@{hello} {
+	color: blue;
+}
+
+hello world @{hello} {
+	color: red;
+}
+
+#@{world} {
+	color: "hello @{hello}";
+}
+
+
+@num: 3;
+
+[prop],
+[prop="value@{num}"],
+[prop*="val@{num}"],
+[|prop~="val@{num}"],
+[*|prop$="val@{num}"],
+[ns|prop^="val@{num}"],
+[@{num}^="val@{num}"],
+[@{num}=@{num}],
+[@{num}] {
+  attributes: yes;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/keyframes.less b/vendor/leafo/lessphp/tests/inputs/keyframes.less
new file mode 100644
index 00000000..e65a38b9
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/keyframes.less
@@ -0,0 +1,52 @@
+@keyframes 'bounce' {
+	from {
+		top: 100px;
+		animation-timing-function: ease-out;
+	}
+
+	25% {
+		top: 50px;
+		animation-timing-function: ease-in;
+	}
+
+	50% {
+		top: 100px;
+		animation-timing-function: ease-out;
+	}
+
+	75% {
+		top: 75px;
+		animation-timing-function: ease-in;
+	}
+
+	to {
+		top: 100px;
+	}
+}
+
+@-webkit-keyframes flowouttoleft {
+	0% { -webkit-transform: translateX(0) scale(1); }
+	60%, 70% { -webkit-transform: translateX(0) scale(.7); }
+	100% { -webkit-transform: translateX(-100%) scale(.7); }
+}
+
+div {
+	animation-name: 'diagonal-slide';
+	animation-duration: 5s;
+	animation-iteration-count: 10;
+}
+
+@keyframes 'diagonal-slide' {
+
+	from {
+		left: 0;
+		top: 0;
+	}
+
+	to {
+		left: 100px;
+		top: 100px;
+	}
+
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/math.less b/vendor/leafo/lessphp/tests/inputs/math.less
new file mode 100644
index 00000000..db59d356
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/math.less
@@ -0,0 +1,122 @@
+
+.unary {
+	// all operators are parsable as unary operators, anything
+	// but - throws an error right now though,
+
+	// this gives two numbers
+	sub: 10 -5;
+	// add: 10 +5; // error
+	// div: 10 /5; // error
+	// mul: 10 *5; // error
+}
+
+.spaces {
+	// we can make the parser do math by leaving out the
+	// space after the first value, or putting spaces on both sides
+
+	sub1: 10-5;
+	sub2: 10 - 5;
+
+	add1: 10+5;
+	add2: 10 + 5;
+
+	// div: 10/5; // this wont work, read on
+	div: 10 / 5;
+
+	mul1: 10*5;
+	mul2: 10 * 5;
+}
+
+// these properties have divison not in parenthases
+.supress-division {
+	border-radius: 10px / 10px;
+	border-radius: 10px/12px;
+	border-radius: hello (10px/10px) world;
+	@x: 10px;
+	font: @x/30 sans-serif;
+	font: 10px / 20px sans-serif;
+	font: 10px/22px sans-serif;
+	border-radius:0 15px 15px 15px / 0 50% 50% 50%;
+}
+
+
+.parens {
+	// if you are unsure, then just wrap the expression in parentheses and it will
+	// always evaluate.
+
+	// notice we no longer have unary operators, and these will evaluate
+	sub: (10 -5);
+	add: (10 +5);
+	div1: (10 /5);
+	div2: (10/5); // no longer interpreted as the shorthand
+	mul: (10 *5);
+}
+
+.keyword-names {
+	// watch out when doing math with keywords, - is a valid keyword character
+	@a: 100;
+	@b: 25;
+	@a-: "hello";
+	height: @a-@b; // here we get "hello" 25, not 75
+}
+
+
+.negation {
+	neg1: -(1px);
+	neg2: 0-(1px);
+
+	@something: 10;
+	neg3: -@something;
+}
+
+
+// and now here are the tests
+
+.test {
+	single1: (5);
+	single2: 5+(5);
+	single3: (5)+((5));
+
+	parens: (5 +(5)) -2;
+	// parens: ((5 +(5)) -2); // FAILS - fixme
+
+	math1: (5 + 5)*(2 / 1);
+	math2: (5+5)*(2/1);
+
+	complex1: 2 * (4 * (2 + (1 + 6))) - 1;
+	complex2: ((2+3)*(2+3) / (9-4)) + 1;
+	complex3: (2px + 4px) 1em 2px 2;
+
+	@var: (2 * 2);
+	var1: (2 * @var) 4 4 (@var * 1px);
+	var2: (@var * @var) * 6;
+	var3: 4 * (5 + 5) / 2 - (@var * 2);
+
+	complex4: (7 * 7) + (8 * 8);
+}
+
+.percents {
+	p1: 100 * 10%;
+	p2: 10% * 100;
+	p3: 10% * 10%;
+
+	p4: 100px * 10%; // lessjs makes this px
+	p5: 10% * 100px; // lessjs makes this %
+
+	p6: 20% + 10%;
+	p7: 20% - 10%;
+
+	p8: 20% / 10%;
+}
+
+.misc {
+	x: 10px * 4em;
+	y: 10 * 4em;
+}
+
+
+.cond {
+	c1: 10 < 10;
+	c2: 10 >= 10;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/media.less b/vendor/leafo/lessphp/tests/inputs/media.less
new file mode 100644
index 00000000..8c16a3cf
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/media.less
@@ -0,0 +1,68 @@
+@media screen, 3D {
+	P { color: green; }
+}
+@media print {
+	body { font-size: 10pt }
+}
+@media screen {
+	body { font-size: 13px }
+}
+@media screen, print {
+	body { line-height: 1.2 }
+}
+
+@media all and (min-width: 0px) {
+	body { line-height: 1.2 }
+}
+
+@media all and (min-width: 0) {
+	body { line-height: 1.2 }
+}
+
+@media
+	screen and (min-width: 102.5em) and (max-width: 117.9375em),
+	screen and (min-width: 150em) {
+    body { color: blue }
+}
+
+
+@media screen and (min-height: 100px + 10px) {
+	body { color: red; }
+}
+
+@cool: 100px;
+
+@media screen and (height: @cool) and (width: @cool + 10), (size: @cool + 20) {
+	body { color: red; }
+}
+
+
+// media bubbling
+
+@media test {
+	div {
+		height: 20px;
+		@media (hello) {
+			color: red;
+
+			pre {
+				color: orange;
+			}
+		}
+	}
+}
+
+// should not cross boundary
+@media yeah {
+	@page {
+		@media cool {
+			color: red;
+		}
+	}
+}
+
+// variable in query
+@mobile: ~"(max-width: 599px)";
+@media @mobile {
+	.helloworld { color: blue }
+}
diff --git a/vendor/leafo/lessphp/tests/inputs/misc.less b/vendor/leafo/lessphp/tests/inputs/misc.less
new file mode 100644
index 00000000..eb690b9a
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/misc.less
@@ -0,0 +1,100 @@
+
+@color: #fff;
+@base_path: "/assets/images/";
+@images: @base_path + "test/";
+.topbar { background: url(@{images}topbar.png); }
+.hello { test: empty-function(@images, 40%, to(@color)); }
+
+.css3 {
+	background-image: -webkit-gradient(linear, 0% 0%, 0% 90%,
+		from(#E9A000), to(#A37000));
+}
+
+
+/**
+
+Here is a block comment
+
+**/
+
+
+// this is a comment
+
+.test, /*hello*/.world {
+	border: 1px solid red; // world
+	/* another property */
+	color: url(http://mage-page.com);
+	string: "hello /* this is not a comment */";
+	world: "// neither is this";
+	string: 'hello /* this is not a comment */' /*what if this is a comment */;
+	world: '// neither is this' // hell world;
+	;
+	what-/*something?*/ever: 100px;
+	background: url(/*no comment here*/);
+}
+
+
+.urls {
+	@var: "http://google.com";
+	background1: url(@var);
+	background2: url(@{var});
+	background3: url("@{var}");
+}
+
+.mix(@arg) { color: @arg; }
+@aaa: aaa;
+@bbb: bbb;
+// make sure the opening selector isn't too greedy
+.cool {.mix("@{aaa}, @{bbb}")}
+.cool();
+
+
+
+// merging of mixins
+.span-17 { float: left; }
+.span-17 { width: 660px; }
+
+.x {.span-17;}
+
+.hi {
+	pre {
+		color: red;
+	}
+}
+
+.hi {
+	pre {
+		color: blue;
+	}
+}
+
+.rad {
+	.hi;
+}
+
+
+hello {
+	numbers: 1.0 0.1 .1 1.;
+	numbers: 1.0s 0.1s .1s 1.s;
+	numbers: -1.0s -0.1s -.1s -1.s;
+	numbers: -1.0 -0.1 -.1 -1.;
+}
+
+
+#string {
+	hello: 'what\'s going on here';
+	hello: 'blah blag @{ blah blah';
+
+	join: 3434 + "hello";
+	join: 3434 + hello;
+}
+
+
+.duplicates {
+	hello: world;
+	hello: "world";
+	hello: world;
+	hello: "what";
+	hello: world;
+	hello: "world";
+}
diff --git a/vendor/leafo/lessphp/tests/inputs/mixin_functions.less b/vendor/leafo/lessphp/tests/inputs/mixin_functions.less
new file mode 100644
index 00000000..2d858ad6
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/mixin_functions.less
@@ -0,0 +1,33 @@
+
+@outer: 10px;
+@class(@var:22px, @car: 400px + @outer) {
+  margin: @var;
+  height: @car;
+}
+
+@group {
+  @f(@color) {
+    color: @color;
+  }
+  .cool {
+    border-bottom: 1px solid green;
+  }
+}
+
+.class(@width:200px) {
+  padding: @width;
+}
+
+body {
+  .class(2.0em);
+  @group > @f(red);
+  @class(10px, 10px + 2);
+  @group > .cool;
+}
+
+
+@lots(@a: 10px, @b: 20px, @c: 30px, @d: 40px, @e: 4px, @f:3px, @g:2px, @h: 1px) {
+	padding: @a @b @c @d;
+	margin: @e @f @g @h;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/mixin_merging.less.disable b/vendor/leafo/lessphp/tests/inputs/mixin_merging.less.disable
new file mode 100644
index 00000000..86b3e0cb
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/mixin_merging.less.disable
@@ -0,0 +1,100 @@
+
+@tester {
+	p, div { height: 10px; }
+}
+
+#test1 {
+	div { color: red; }
+	@tester;
+}
+
+
+@cool {
+	a,b,i { width: 1px; }
+}
+
+#test2 {
+	b { color: red; }
+	@cool;
+}
+
+#test3 {
+	@cool;
+	b { color: red; }
+}
+
+@cooler {
+	a { margin: 1px; }
+}
+
+#test4 {
+	a, div, html { color: blue; }
+	@cooler;
+}
+
+@hi {
+	img, strong { float: right; }
+}
+
+#test5 {
+	img, strong { padding: 2px; }
+	@hi;
+}
+
+@nested {
+	div, span {
+		a {
+			color: red;
+		}
+	}
+}
+
+#test6 {
+	div, span {
+		a {
+			line-height: 10px;
+		}
+	}
+	@nested;
+}
+
+@broken-nesting {
+	div, span {
+		strong, b {
+			color: red;
+		}
+	}
+
+}
+
+#test7 {
+	div {
+		strong {
+			margin: 1px;
+		}
+	}
+	@broken-nesting;
+}
+
+
+@another-nest {
+	a,b {
+		i {
+			color: red;
+		}
+
+		s {
+			color: blue;
+		}
+	}
+}
+
+#test8 {
+	a, b {
+		i,s {
+			background: red;
+		}
+	}
+	@another-nest;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/mixins.less b/vendor/leafo/lessphp/tests/inputs/mixins.less
new file mode 100644
index 00000000..768e6384
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/mixins.less
@@ -0,0 +1,197 @@
+
+@rounded-corners {
+	border-radius: 10px;
+}
+
+.bold {
+	@font-size: 20px;
+	font-size: @font-size;
+	font-weight: bold;
+}
+
+body #window {
+	@rounded-corners;
+	.bold;
+	line-height: @font-size * 1.5;
+}
+
+#bundle {
+  .button {
+    display: block;
+    border: 1px solid black;
+    background-color: grey;
+    &:hover { background-color: white }
+  }
+}
+#header a {
+  color: orange;
+  #bundle > .button; // mixin the button class
+}
+
+div {
+	@abstract {
+		hello: world;
+		b {
+			color: blue;
+		}
+	}
+
+	@abstract > b;
+	@abstract;
+}
+
+@poop {
+	big: baby;
+}
+
+body {
+	div;
+}
+
+// not using > to list mixins
+
+.hello {
+  .world {
+    color: blue;
+  }
+}
+
+.foobar {
+  .hello .world;
+}
+
+
+// arguments
+
+.spam(@something: 100, @dad: land) {
+	@wow: 23434;
+    foo: @arguments;
+    bar: @arguments;
+}
+
+.eggs {
+    .spam(1px, 2px);
+    .spam();
+}
+
+.first(@one, @two, @three, @four: cool) {
+	cool: @arguments;
+}
+
+#hello {
+	.first(one, two, three);
+}
+
+#hello-important {
+	.first(one, two, three) !important;
+}
+
+.rad(@name) {
+	cool: @arguments;
+}
+
+#world {
+	@hello: "world";
+	.rad("@{hello}");
+}
+
+.second(@x, @y:skip, @z: me) {
+	things: @arguments;
+}
+
+#another {
+	.second(red, blue, green);
+	.second(red blue green);
+}
+
+
+.another(@x, @y:skip, @z:me) {
+  .cool {
+    color: @arguments;
+  }
+}
+
+#day {
+	.another(one,two, three);
+	.another(one two three);
+}
+
+
+.to-be-important() {
+  color: red;
+  @color: red;
+  height: 20px;
+
+  pre {
+    color: @color;
+  }
+}
+
+.mix-suffix {
+  .to-be-important() !important;
+}
+
+
+
+
+#search-all {
+  .red() {
+    color:#f00 !important;
+  }
+}
+
+#search-all {
+  .green() {
+    color: #0f0 !important;
+  }
+}
+
+.search-test {
+	#search-all > .red();
+	#search-all > .green();
+}
+
+
+// mixin self without infinite loop
+.cowboy() {
+	color: blue;
+}
+
+.cowboy {
+	.cowboy;
+}
+
+
+// semicolon
+
+.semi1(@color: red, blue, green;) {
+	color: @color;
+}
+
+.semi2(@color: red, blue, green; dad) {
+	color: @color;
+}
+
+.semi3(hello; world; piss) {
+	hello: world;
+}
+
+
+
+// self referencing skipping
+
+.nav-divider(@color: red){
+    padding: 10px;
+}
+
+.nav {
+  .nav-divider {
+    .nav-divider();
+  }
+}
+
+.nav-divider {
+    .nav-divider();
+}
+
+
diff --git a/vendor/leafo/lessphp/tests/inputs/nested.less b/vendor/leafo/lessphp/tests/inputs/nested.less
new file mode 100644
index 00000000..0b62ea19
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/nested.less
@@ -0,0 +1,60 @@
+#header {
+  color: black;
+
+  .navigation {
+    font-size: 12px;
+	.border {
+		.outside {
+			color: blue;
+		}
+	}
+  }
+  .logo {
+    width: 300px;
+    &:hover { text-decoration: none }
+  }
+}
+
+a { b { ul { li { color: green; } } } }
+
+this { will { not { show { } } } }
+
+.cool {
+  div & { color: green; }
+  p & span { color: yellow; }
+}
+
+another {
+ .cool;
+}
+
+b {
+  & .something {
+    color: blue;
+  }
+
+  &.something {
+    color: blue;
+  }
+}
+
+.foo {
+  .bar, .baz {
+    & .qux {
+      display: block;
+    }
+    .qux & {
+      display: inline;
+    }
+    .qux & .biz {
+      display: none;
+    }
+  }
+}
+
+b {
+	hello [x="&yeah"] {
+		color: red;
+	}
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/pattern_matching.less b/vendor/leafo/lessphp/tests/inputs/pattern_matching.less
new file mode 100644
index 00000000..c2a0da91
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/pattern_matching.less
@@ -0,0 +1,157 @@
+
+.demo (light, @color) {
+  color: lighten(@color, 10%);
+}
+.demo (@_, @color) {
+  display: block;
+}
+
+@switch: light;
+
+.class {
+  .demo(@switch, #888);
+}
+
+// by arity
+
+.mixin () {
+    zero: 0;
+}
+.mixin (@a: 1px) {
+    one: 1;
+}
+.mixin (@a) {
+    one-req: 1;
+}
+.mixin (@a: 1px, @b: 2px) {
+    two: 2;
+}
+
+.mixin (@a, @b, @c) {
+    three-req: 3;
+}
+
+.mixin (@a: 1px, @b: 2px, @c: 3px) {
+    three: 3;
+}
+
+.zero {
+    .mixin();
+}
+
+.one {
+    .mixin(1);
+}
+
+.two {
+    .mixin(1, 2);
+}
+
+.three {
+    .mixin(1, 2, 3);
+}
+
+//
+
+.mixout ('left') {
+    left: 1;
+}
+
+.mixout ('right') {
+    right: 1;
+}
+
+.left {
+    .mixout('left');
+}
+.right {
+    .mixout('right');
+}
+
+//
+
+.border (@side, @width) {
+    color: black;
+    .border-side(@side, @width);
+}
+.border-side (left, @w) {
+    border-left: @w;
+}
+.border-side (right, @w) {
+    border-right: @w;
+}
+
+.border-right {
+    .border(right, 4px);
+}
+.border-left {
+    .border(left, 4px);
+}
+
+//
+
+
+.border-radius (@r) {
+    both: @r * 10;
+}
+.border-radius (@r, left) {
+    left: @r;
+}
+.border-radius (@r, right) {
+    right: @r;
+}
+
+.only-right {
+    .border-radius(33, right);
+}
+.only-left {
+    .border-radius(33, left);
+}
+.left-right {
+    .border-radius(33);
+}
+
+.hola(hello, @hello...) {
+	color: blue;
+}
+
+#hola {
+	.hola(hello, world);
+}
+
+.resty(@hello, @world, @the_rest...) {
+	padding: @hello @world;
+	rest: @the_rest;
+}
+
+.defaults(@aa, @bb:e343, @cc: "heah", ...) {
+	height: @aa;
+}
+
+#defaults_1 {
+	.defaults(one);
+	.defaults(two, one);
+	.defaults(three, two, one);
+	.defaults(four, three, two, one);
+}
+
+
+.thing() { color: green; }
+.thing(...) { color: blue; }
+.thing { color: red; }
+
+#aa {
+	.thing();
+}
+
+#bb {
+	.thing;
+}
+
+
+#cc {
+	.thing(1);
+}
+
+
+
diff --git a/vendor/leafo/lessphp/tests/inputs/scopes.less b/vendor/leafo/lessphp/tests/inputs/scopes.less
new file mode 100644
index 00000000..42e46969
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/scopes.less
@@ -0,0 +1,40 @@
+
+
+@a: 10;
+@some {
+	@b: @a + 10;
+	div {
+		@c: @b + 10;
+		other {
+			@d: @c + 10;
+			world {
+				@e: @d + 10;
+				height: @e;
+			}
+		}
+	}
+}
+
+
+body {
+	@some;
+}
+
+@some;
+
+.test(@x: 10) {
+	height: @x;
+	.test(@y: 11) {
+		height: @y;
+		.test(@z: 12) {
+			height: @z;
+		}
+		.test;
+	}
+	.test;
+}
+
+pre {
+	.test;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/selector_expressions.less b/vendor/leafo/lessphp/tests/inputs/selector_expressions.less
new file mode 100644
index 00000000..b8aa2214
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/selector_expressions.less
@@ -0,0 +1,29 @@
+
+@color: blue;
+
+something @{color}, world {
+	color: blue;
+}
+
+.div {
+	@color: red;
+	(3434) {
+		height: 100px;
+	}
+
+	cool @{color} {
+		height: 4000px;
+	}
+}
+
+.heck(@a) { color: @a+10 }
+
+.spanX (@index) when (@index > 0) {
+	.span@{index} { .heck(@index) }
+	.spanX(@index - 1);
+}
+.spanX (0) {}
+
+.spanX (5);
+
+
diff --git a/vendor/leafo/lessphp/tests/inputs/site_demos.less b/vendor/leafo/lessphp/tests/inputs/site_demos.less
new file mode 100644
index 00000000..08d7f1e5
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/site_demos.less
@@ -0,0 +1,120 @@
+// these are the demos from the lessphp homepage
+
+default {
+	@base: 24px;
+	@border-color: #B2B;
+
+	.underline { border-bottom: 1px solid green }
+
+	#header {
+	  color: black;
+	  border: 1px solid @border-color + #222222;
+
+	  .navigation {
+		font-size: @base / 2;
+		a {
+		.underline;
+		}
+	  }
+	  .logo {
+		width: 300px;
+		&:hover { text-decoration: none }
+	  }
+	}
+}
+
+variables {
+	@a: 2;
+	@x: @a * @a;
+	@y: @x + 1;
+	@z: @x * 2 + @y;
+
+	@nice-blue: #5B83AD;
+	@light-blue: @nice-blue + #111;
+
+	@b: @a * 10;
+	@c: #888;
+	@fonts: "Trebuchet MS", Verdana, sans-serif;
+
+	.variables {
+	  width: @z + 1cm; // 14cm
+	  height: @b + @x + 0px; // 24px
+	  color: @c;
+	  background: @light-blue;
+	  font-family: @fonts;
+	}
+}
+
+mixins {
+	.bordered {
+	  border-top: dotted 1px black;
+	  border-bottom: solid 2px black;
+	}
+	#menu a {
+	  color: #111;
+	  .bordered;
+	}
+
+	.post a {
+	  color: red;
+	  .bordered;
+	}
+}
+
+nested-rules {
+	#header {
+	  color: black;
+
+	  .navigation {
+		font-size: 12px;
+	  }
+	  .logo {
+		width: 300px;
+		&:hover { text-decoration: none }
+	  }
+	}
+}
+
+namespaces {
+	#bundle {
+	  .button {
+		display: block;
+		border: 1px solid black;
+		background-color: grey;
+		&:hover { background-color: white }
+	  }
+	}
+	#header a {
+	  color: orange;
+	  #bundle > .button; // mixin the button class
+	}
+}
+
+mixin-functions {
+	@outer: 10px;
+	@class(@var:22px, @car: 400px + @outer) {
+	  margin: @var;
+	  height: @car;
+	}
+
+	@group {
+	  @f(@color) {
+		color: @color;
+	  }
+	  .cool {
+		border-bottom: 1px solid green;
+	  }
+	}
+
+	.class(@width:200px) {
+	  padding: @width;
+	}
+
+	body {
+	  .class(2.0em);
+	  @group > @f(red);
+	  @class(10px, 10px + 2);
+	  @group > .cool;
+	}
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/test-imports/a.less b/vendor/leafo/lessphp/tests/inputs/test-imports/a.less
new file mode 100644
index 00000000..a00464db
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/test-imports/a.less
@@ -0,0 +1,6 @@
+.just-a-class { background: red; }
+
+.some-mixin() {
+	height: 200px;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/test-imports/b.less b/vendor/leafo/lessphp/tests/inputs/test-imports/b.less
new file mode 100644
index 00000000..599ed3a4
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/test-imports/b.less
@@ -0,0 +1,12 @@
+.just-a-class { background: blue; }
+
+.hello {
+	.some-mixin();
+}
+
+
+@media cool {
+	color: red;
+	.some-mixin();
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/test-imports/file1.less b/vendor/leafo/lessphp/tests/inputs/test-imports/file1.less
new file mode 100644
index 00000000..658de0c5
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/test-imports/file1.less
@@ -0,0 +1,16 @@
+
+
+/**
+ * This is a test import file
+ */
+
+@colors {
+	div.bright {
+		color: red;
+	}
+
+	div.sad {
+		color: blue;
+	}
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/test-imports/file2.less b/vendor/leafo/lessphp/tests/inputs/test-imports/file2.less
new file mode 100644
index 00000000..2cae8dce
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/test-imports/file2.less
@@ -0,0 +1,6 @@
+
+b {
+	color: @color;
+	padding: 16px;
+}
+
diff --git a/vendor/leafo/lessphp/tests/inputs/test-imports/file3.less b/vendor/leafo/lessphp/tests/inputs/test-imports/file3.less
new file mode 100644
index 00000000..28b643ea
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/test-imports/file3.less
@@ -0,0 +1,7 @@
+
+h2 {
+	background: url("../images/logo.png") no-repeat;
+}
+
+@someValue: hello-from-file-3;
+
diff --git a/vendor/leafo/lessphp/tests/inputs/test-imports/inner/file1.less b/vendor/leafo/lessphp/tests/inputs/test-imports/inner/file1.less
new file mode 100644
index 00000000..df654a7e
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/test-imports/inner/file1.less
@@ -0,0 +1,6 @@
+
+.inner {
+	content: "inner/file1.less"
+}
+
+@import "file2"; // should get the one in inner
diff --git a/vendor/leafo/lessphp/tests/inputs/test-imports/inner/file2.less b/vendor/leafo/lessphp/tests/inputs/test-imports/inner/file2.less
new file mode 100644
index 00000000..f40d3c67
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/test-imports/inner/file2.less
@@ -0,0 +1,4 @@
+
+.inner {
+	content: "inner/file2.less"
+}
diff --git a/vendor/leafo/lessphp/tests/inputs/variables.less b/vendor/leafo/lessphp/tests/inputs/variables.less
new file mode 100644
index 00000000..6e18eb80
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs/variables.less
@@ -0,0 +1,44 @@
+@a: 2;
+@x: @a * @a;
+@y: @x + 1;
+@z: @y + @x * 2;
+@m: @z % @y;
+
+@nice-blue: #5B83AD;
+@light-blue: @nice-blue + #111;
+
+@rgb-color: rgb(20%, 15%, 80%);
+@rgba-color: rgba(23,68,149,0.5);
+
+@b: @a * 10px;
+@c: #888;
+@fonts: "Trebuchet MS", Verdana, sans-serif;
+
+.variables {
+  width: @z + 1cm; // 14cm
+  height: @b + @x + 0px; // 24px
+  margin-top: -@b; // -20px
+  margin-bottom: 10 - -@b; // 30px
+  @d: @c + #001;
+  color: @d;
+  background: @light-blue;
+  font-family: @fonts;
+  margin: @m + 0px; // 3px
+  font: 10px/12px serif;
+  font: 120%/120% serif;
+}
+
+.external {
+  color: @c;
+  border: 1px solid @rgb-color;
+  background: @rgba-color;
+}
+
+@hello: 44px;
+@something: "hello";
+@cool: something;
+
+outer1: @@something;
+outer2: @@@cool;
+
+
diff --git a/vendor/leafo/lessphp/tests/inputs_lessjs/mixins-args.less b/vendor/leafo/lessphp/tests/inputs_lessjs/mixins-args.less
new file mode 100644
index 00000000..c3965924
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs_lessjs/mixins-args.less
@@ -0,0 +1,205 @@
+.mixin (@a: 1px, @b: 50%) {
+  width: (@a * 5);
+  height: (@b - 1%);
+}
+
+.mixina (@style, @width, @color: black) {
+    border: @width @style @color;
+}
+
+.mixiny
+(@a: 0, @b: 0) {
+  margin: @a;
+  padding: @b;
+}
+
+.hidden() {
+  color: transparent; // asd
+}
+
+#hidden {
+  .hidden;
+}
+
+#hidden1 {
+  .hidden();
+}
+
+.two-args {
+  color: blue;
+  .mixin(2px, 100%);
+  .mixina(dotted, 2px);
+}
+
+.one-arg {
+  .mixin(3px);
+}
+
+.no-parens {
+  .mixin;
+}
+
+.no-args {
+  .mixin();
+}
+
+.var-args {
+  @var: 9;
+  .mixin(@var, (@var * 2));
+}
+
+.multi-mix {
+  .mixin(2px, 30%);
+  .mixiny(4, 5);
+}
+
+.maxa(@arg1: 10, @arg2: #f00) {
+  padding: (@arg1 * 2px);
+  color: @arg2;
+}
+
+body {
+  .maxa(15);
+}
+
+@glob: 5;
+.global-mixin(@a:2) {
+  width: (@glob + @a);
+}
+
+.scope-mix {
+  .global-mixin(3);
+}
+
+.nested-ruleset (@width: 200px) {
+    width: @width;
+    .column { margin: @width; }
+}
+.content {
+    .nested-ruleset(600px);
+}
+
+//
+
+.same-var-name2(@radius) {
+  radius: @radius;
+}
+.same-var-name(@radius) {
+  .same-var-name2(@radius);
+}
+#same-var-name {
+  .same-var-name(5px);
+}
+
+//
+
+.var-inside () {
+    @var: 10px;
+    width: @var;
+}
+#var-inside { .var-inside; }
+
+.mixin-arguments (@width: 0px, ...) {
+    border: @arguments;
+    width: @width;
+}
+
+.arguments {
+    .mixin-arguments(1px, solid, black);
+}
+.arguments2 {
+    .mixin-arguments();
+}
+.arguments3 {
+    .mixin-arguments;
+}
+
+.mixin-arguments2 (@width, @rest...) {
+    border: @arguments;
+    rest: @rest;
+    width: @width;
+}
+.arguments4 {
+    .mixin-arguments2(0, 1, 2, 3, 4);
+}
+
+// Edge cases
+
+.edge-case {
+    .mixin-arguments("{");
+}
+
+// Division vs. Literal Slash
+.border-radius(@r: 2px/5px) {
+  border-radius: @r;
+}
+.slash-vs-math {
+  .border-radius();
+  .border-radius(5px/10px);
+  .border-radius((3px * 2));
+}
+// semi-colon vs comma for delimiting
+
+.mixin-takes-one(@a) {
+    one: @a;
+}
+
+.mixin-takes-two(@a; @b) {
+    one: @a;
+    two: @b;
+}
+
+.comma-vs-semi-colon {
+    .mixin-takes-two(@a : a; @b : b, c);
+    .mixin-takes-two(@a : d, e; @b : f);
+    .mixin-takes-one(@a: g);
+    .mixin-takes-one(@a : h;);
+    .mixin-takes-one(i);
+    .mixin-takes-one(j;);
+    .mixin-takes-two(k, l);
+    .mixin-takes-one(m, n;);
+    .mixin-takes-two(o, p; q);
+    .mixin-takes-two(r, s; t;);
+}
+
+.mixin-conflict(@a:defA, @b:defB, @c:defC) {
+  three: @a, @b, @c;
+}
+
+.mixin-conflict(@a:defA, @b:defB, @c:defC, @d:defD) {
+  four: @a, @b, @c, @d;
+}
+
+#named-conflict {
+  .mixin-conflict(11, 12, 13, @a:a);
+  .mixin-conflict(@a:a, 21, 22, 23);
+}
+@a: 3px;
+.mixin-default-arg(@a: 1px, @b: @a, @c: @b) {
+  defaults: 1px 1px 1px;
+  defaults: 2px 2px 2px;
+}
+
+.test-mixin-default-arg {
+  .mixin-default-arg();
+  .mixin-default-arg(2px);
+}
+
+.mixin-comma-default1(@color; @padding; @margin: 2, 2, 2, 2) {
+  margin: @margin;
+}
+.selector {
+  .mixin-comma-default1(#33acfe; 4);
+}
+.mixin-comma-default2(@margin: 2, 2, 2, 2;) {
+  margin: @margin;
+}
+.selector2 {
+  .mixin-comma-default2();
+}
+.mixin-comma-default3(@margin: 2, 2, 2, 2) {
+  margin: @margin;
+}
+.selector3 {
+  .mixin-comma-default3(4,2,2,2);
+}
diff --git a/vendor/leafo/lessphp/tests/inputs_lessjs/mixins-named-args.less b/vendor/leafo/lessphp/tests/inputs_lessjs/mixins-named-args.less
new file mode 100644
index 00000000..f62dc86a
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs_lessjs/mixins-named-args.less
@@ -0,0 +1,36 @@
+.mixin (@a: 1px, @b: 50%) {
+  width: (@a * 5);
+  height: (@b - 1%);
+  args: @arguments;
+}
+.mixin (@a: 1px, @b: 50%) when (@b > 75%){
+  text-align: center;
+}
+
+.named-arg {
+  color: blue;
+  .mixin(@b: 100%);
+}
+
+.class {
+  @var: 20%;
+  .mixin(@b: @var);
+}
+
+.all-args-wrong-args {
+  .mixin(@b: 10%, @a: 2px);
+}
+
+.mixin2 (@a: 1px, @b: 50%, @c: 50) {
+  width: (@a * 5);
+  height: (@b - 1%);
+  color: (#000000 + @c);
+}
+
+.named-args2 {
+  .mixin2(3px, @c: 100);
+}
+
+.named-args3 {
+  .mixin2(@b: 30%, @c: #123456);
+}
diff --git a/vendor/leafo/lessphp/tests/inputs_lessjs/strings.less b/vendor/leafo/lessphp/tests/inputs_lessjs/strings.less
new file mode 100644
index 00000000..32fad721
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/inputs_lessjs/strings.less
@@ -0,0 +1,51 @@
+#strings {
+  background-image: url("http://son-of-a-banana.com");
+  quotes: "~" "~";
+  content: "#*%:&^,)!.(~*})";
+  empty: "";
+  brackets: "{" "}";
+  escapes: "\"hello\" \\world";
+  escapes2: "\"llo";
+}
+#comments {
+  content: "/* hello */ // not-so-secret";
+}
+#single-quote {
+  quotes: "'" "'";
+  content: '""#!&""';
+  empty: '';
+  semi-colon: ';';
+}
+#escaped {
+  filter: ~"DX.Transform.MS.BS.filter(opacity=50)";
+}
+#one-line { image: url(http://tooks.com) }
+#crazy { image: url(http://), "}", url("http://}") }
+#interpolation {
+  @var: '/dev';
+  url: "http://lesscss.org@{var}/image.jpg";
+
+  @var2: 256;
+  url2: "http://lesscss.org/image-@{var2}.jpg";
+
+  @var3: #456;
+  url3: "http://lesscss.org@{var3}";
+
+  @var4: hello;
+  url4: "http://lesscss.org/@{var4}";
+
+  @var5: 54.4px;
+  url5: "http://lesscss.org/@{var5}";
+}
+
+// multiple calls with string interpolation
+
+.mix-mul (@a: green) {
+    color: ~"@{a}";
+}
+.mix-mul-class {
+    .mix-mul(blue);
+    .mix-mul(red);
+    .mix-mul(black);
+    .mix-mul(orange);
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/accessors.css b/vendor/leafo/lessphp/tests/outputs/accessors.css
new file mode 100644
index 00000000..2f3c9e61
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/accessors.css
@@ -0,0 +1,14 @@
+.article { color:#294366; }
+.comment {
+  width:960px;
+  color:#294366;
+  padding:10px;
+}
+.wow {
+  height:960px;
+  background-color:#294366;
+  color:green;
+  padding:;
+  margin:;
+}
+.mix { font-size:10px; }
diff --git a/vendor/leafo/lessphp/tests/outputs/arity.css b/vendor/leafo/lessphp/tests/outputs/arity.css
new file mode 100644
index 00000000..5173561d
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/arity.css
@@ -0,0 +1,25 @@
+.one {
+  hello: one;
+  world: one;
+}
+.two {
+  hello: two;
+  world: two;
+}
+.three {
+  hello: three;
+  world: three;
+}
+.multi-foo {
+  foo: two cool;
+  foo: three cool yeah;
+  foo: two 1;
+  foo: three 1 yeah;
+  foo: three 1 1;
+}
+.multi-baz {
+  baz: two cool;
+  baz: three yeah;
+  baz: two 1;
+  baz: three 1;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/attributes.css b/vendor/leafo/lessphp/tests/outputs/attributes.css
new file mode 100644
index 00000000..fb0e176c
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/attributes.css
@@ -0,0 +1,105 @@
+* {
+  color: blue;
+}
+E {
+  color: blue;
+}
+E[foo] {
+  color: blue;
+}
+[foo] {
+  color: blue;
+}
+[foo] .helloWorld {
+  color: blue;
+}
+[foo].helloWorld {
+  color: blue;
+}
+E[foo="barbar"] {
+  color: blue;
+}
+E[foo~="hello#$@%@$#^"] {
+  color: blue;
+}
+E[foo^="color: green;"] {
+  color: blue;
+}
+E[foo$="239023"] {
+  color: blue;
+}
+E[foo*="29302"] {
+  color: blue;
+}
+E[foo|="239032"] {
+  color: blue;
+}
+E:root {
+  color: blue;
+}
+E:nth-child(odd) {
+  color: blue;
+}
+E:nth-child(2n+1) {
+  color: blue;
+}
+E:nth-child(5) {
+  color: blue;
+}
+E:nth-last-child(-n+2) {
+  color: blue;
+}
+E:nth-of-type(2n) {
+  color: blue;
+}
+E:nth-last-of-type(n) {
+  color: blue;
+}
+E:first-child {
+  color: blue;
+}
+E:last-child {
+  color: blue;
+}
+E:first-of-type {
+  color: blue;
+}
+E:last-of-type {
+  color: blue;
+}
+E:only-child {
+  color: blue;
+}
+E:only-of-type {
+  color: blue;
+}
+E:empty {
+  color: blue;
+}
+E:lang(en) {
+  color: blue;
+}
+E::first-line {
+  color: blue;
+}
+E::before {
+  color: blue;
+}
+E#id {
+  color: blue;
+}
+E:not(:link) {
+  color: blue;
+}
+E F {
+  color: blue;
+}
+E > F {
+  color: blue;
+}
+E + F {
+  color: blue;
+}
+E ~ F {
+  color: blue;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/builtins.css b/vendor/leafo/lessphp/tests/outputs/builtins.css
new file mode 100644
index 00000000..6ac21f2c
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/builtins.css
@@ -0,0 +1,61 @@
+body {
+  color: "hello world";
+  num-basic: 5.1666666666667;
+  num-floor: 5px;
+  num-ceil: 6px;
+  num2: 0.66666666666667;
+  num2-round: 1;
+  num2-floor: 0;
+  num2-ceil: 1;
+  round-lit: 3px;
+  rgba1: #ff112233;
+  rgba2: #992c3742;
+  argb: #992c3742;
+}
+format {
+  format: "rgb(32, 128, 64)";
+  format-string: "hello world";
+  format-multiple: "hello earth 2";
+  format-url-encode: 'red is %A';
+  eformat: rgb(32, 128, 64);
+}
+#functions {
+  str1: true;
+  str2: false;
+  num1: true;
+  num2: true;
+  num3: true;
+  num4: false;
+  col1: true;
+  col2: false;
+  col3: true;
+  col4: true;
+  key1: true;
+  key2: false;
+  px1: true;
+  px2: false;
+  per1: true;
+  per2: false;
+  em1: true;
+  em2: false;
+  ex1: 2;
+  ex2: 1;
+  ex3: extract(1,1);
+  ex4: 2;
+  pow: 16;
+  pi: 3.1415926535898;
+  mod: 4;
+  tan: 1.5574077246549;
+  cos: 0.54030230586814;
+  sin: 0.8414709848079;
+  atan: 0.78539816339745rad;
+  acos: 0rad;
+  asin: 1.5707963267949rad;
+  sqrt: 2.8284271247462;
+}
+#unit {
+  unit-lit: 10;
+  unit-arg: 10s;
+  unit-arg2: 10em;
+  unit-math: 7.407%;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/colors.css b/vendor/leafo/lessphp/tests/outputs/colors.css
new file mode 100644
index 00000000..5310ffb0
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/colors.css
@@ -0,0 +1,103 @@
+body {
+  color: #ff0000;
+  color: #ffffff;
+  color: #000000;
+  color: #996d33;
+  color: rgba(153,109,51,0.3);
+  lighten1: #ffffff;
+  lighten2: #7c8df2;
+  lighten3: rgba(222,140,129,0.5);
+  darken1: #d6d6d6;
+  darken2: #0d1e81;
+  darken3: rgba(18,42,185,0.5);
+  saturate1: #f1eded;
+  saturate2: #0025fe;
+  saturate3: rgba(10,44,244,0.5);
+  desaturate1: #efefef;
+  desaturate2: #3349cb;
+  desaturate3: rgba(36,62,218,0.5);
+  spin1: #efefef;
+  spin2: #2d17e7;
+  spin3: rgba(59,23,231,0.5);
+  spin2: #efefef;
+  spin3: #1769e7;
+  spin4: rgba(23,119,231,0.5);
+  one1: #abcdef;
+  one2: #abcdef;
+  two1: rgba(2,159,35,0.9);
+  two2: rgba(2,159,35,0.9);
+  three1: rgba(1,2,3,0.6);
+  three2: rgba(1,2,3,0.6);
+  four1: rgba(1,2,3,0);
+  four2: rgba(1,2,3,0);
+  hue: 282;
+  sat: 33;
+  lit: 12;
+  what: #dff1da;
+  zero1: #343434;
+  zero2: #003468;
+  zero3: #000000;
+  zero4: #ffffff;
+  zero5: #000000;
+  zero6: #ffffff;
+  zero7: #ffffff;
+  zero8: #ffffff;
+  zero9: #1d5612;
+  zeroa: #56124b;
+  zerob: #000000;
+  zeroc: #ffffff;
+}
+alpha {
+  g1: 0;
+  g2: 1;
+}
+fade {
+  f1: rgba(255,0,0,0.5);
+  f2: rgba(255,255,255,0.2);
+  f3: rgba(34,23,64,0.5);
+}
+.mix {
+  color1: #808080;
+  color2: #808080;
+  color3: rgba(6,3,2,-0.25);
+}
+.contrast {
+  color1: #ff0000;
+  color2: #0000ff;
+}
+.percent {
+  per: 50%;
+}
+.colorz {
+  color1: #ebebeb;
+  color2: #ff9100;
+  color3: #000000;
+}
+body {
+  start: #fcf8e3;
+  spin: #fcf4e3;
+  chained: #fbeed5;
+  direct: #fbefd5;
+}
+pre {
+  spin: #f2dee1;
+}
+dd {
+  background-color: #f5f5f5;
+}
+.ops {
+  c1: #4d0000;
+  c2: #004000;
+  c3: #020002;
+  c4: #ffffff;
+  c5: #fb8173;
+  c6: 132 / #ff0000;
+  c7: 132 - #ff0000;
+  c8: 132- #ff0000;
+}
+.transparent {
+  r: 0;
+  g: 0;
+  b: 0;
+  a: 0;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/compile_on_mixin.css b/vendor/leafo/lessphp/tests/outputs/compile_on_mixin.css
new file mode 100644
index 00000000..318526a5
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/compile_on_mixin.css
@@ -0,0 +1,29 @@
+body {
+  height: 22px;
+}
+body ul {
+  height: 20px;
+}
+body ul li {
+  height: 10px;
+}
+body ul li div span,
+body ul li link {
+  margin: 10px;
+  color: red;
+}
+body ul div,
+body ul p {
+  border: 1px;
+}
+body ul div.hello,
+body ul p.hello {
+  color: green;
+}
+body ul div :what,
+body ul p :what {
+  color: blue;
+}
+body ul a b {
+  color: blue;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/data-uri.css b/vendor/leafo/lessphp/tests/outputs/data-uri.css
new file mode 100644
index 00000000..e51b8f9c
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/data-uri.css
@@ -0,0 +1,6 @@
+.small {
+  background: url("data:text/plain;base64,CmRpdjpiZWZvcmUgewoJY29udGVudDogImhpISI7Cn0KCg==");
+}
+.large {
+  background: url("../../../lessc.inc.php");
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/directives.css b/vendor/leafo/lessphp/tests/outputs/directives.css
new file mode 100644
index 00000000..c2d82b83
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/directives.css
@@ -0,0 +1,27 @@
+@charset "utf-8";
+@-moz-document url-prefix() {
+  div {
+    color: red;
+  }
+}
+@page :left {
+  margin-left: 4cm;
+}
+@page :right {
+  margin-left: 3cm;
+}
+@page {
+  margin: 2cm;
+}
+@-ms-viewport {
+  width: device-width;
+}
+@-moz-viewport {
+  width: device-width;
+}
+@-o-viewport {
+  width: device-width;
+}
+@viewport {
+  width: device-width;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/escape.css b/vendor/leafo/lessphp/tests/outputs/escape.css
new file mode 100644
index 00000000..0587bcab
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/escape.css
@@ -0,0 +1,14 @@
+body {
+  e1: this is simple;
+  e2: this is simple;
+  e3: 1232;
+  e4: world;
+  e5: onemore;
+  t1: eating rice;
+  t2: string cheese;
+  t3: a b c string me d e f;
+  t4: string world;
+}
+.class {
+  filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='image.png');
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/font_family.css b/vendor/leafo/lessphp/tests/outputs/font_family.css
new file mode 100644
index 00000000..fc260fd4
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/font_family.css
@@ -0,0 +1,17 @@
+@font-face {
+  font-family: Graublau Sans Web;
+  src: url(fonts/GraublauWeb.otf) format("opentype");
+}
+@font-face {
+  font-family: Gentium;
+  src: url('fonts/Gentium.ttf');
+}
+@font-face {
+  font-family: Gentium;
+  src: url("fonts/GentiumItalic.ttf");
+  font-style: italic;
+}
+h2 {
+  font-family: Gentium;
+  crazy: maroon;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/guards.css b/vendor/leafo/lessphp/tests/outputs/guards.css
new file mode 100644
index 00000000..34af5495
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/guards.css
@@ -0,0 +1,27 @@
+dd {
+  simple: yellow;
+}
+b {
+  something: red;
+  something-complex: blue cool;
+  something-complex: blue birthday;
+}
+img {
+  another: green;
+  flipped: teal;
+}
+body {
+  yeah-number: purple 232px;
+  yeah-pixel: silver;
+  yeah-number: purple 232;
+}
+div {
+  something-complex: blue true;
+}
+link {
+  color: true red;
+  color: true #fff;
+  color: true #fffddd;
+  color: true #000000;
+  color: true rgba(0,0,0,0.34);
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/hacks.css b/vendor/leafo/lessphp/tests/outputs/hacks.css
new file mode 100644
index 00000000..b8327eb5
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/hacks.css
@@ -0,0 +1,4 @@
+:root .alert-message,
+:root .btn {
+  border-radius: 0 \0;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/hi.css b/vendor/leafo/lessphp/tests/outputs/hi.css
new file mode 100644
index 00000000..3bffcf0b
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/hi.css
@@ -0,0 +1,3 @@
+div:before {
+  content: "hi!";
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/ie.css b/vendor/leafo/lessphp/tests/outputs/ie.css
new file mode 100644
index 00000000..7e4571c8
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/ie.css
@@ -0,0 +1,9 @@
+foo {
+  filter: progid:DXImageTransform.Microsoft.gradient(GradientType=1,startColorstr=#c0ff3300,endColorstr=#ff000000);
+  filter: progid:DXImageTransform.Microsoft.gradient(GradientType=1,startColorstr=#c0ff3300,endColorstr=#ff000001);
+}
+foo {
+  filter: alpha(opacity=20);
+  filter: alpha(opacity=20,enabled=true);
+  filter: blaznicate(foo=bar,baz=bang bip,bart=#fa4600);
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/import.css b/vendor/leafo/lessphp/tests/outputs/import.css
new file mode 100644
index 00000000..b76c25b5
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/import.css
@@ -0,0 +1,51 @@
+@import "not-found";
+@import "something.css" media;
+@import url("something.css") media;
+@import url(something.css) media, screen, print;
+b {
+  color: maroon;
+  padding: 16px;
+}
+body {
+  line-height: 10em;
+}
+body div.bright {
+  color: red;
+}
+body div.sad {
+  color: blue;
+}
+.one {
+  color: blue;
+}
+#merge-import-mixins .just-a-class {
+  background: red;
+}
+#merge-import-mixins .just-a-class {
+  background: blue;
+}
+#merge-import-mixins .hello {
+  height: 200px;
+}
+@media cool {
+  #merge-import-mixins {
+    color: red;
+    height: 200px;
+  }
+}
+#merge-import-mixins div {
+  background: red;
+  background: blue;
+}
+.inner {
+  content: "inner/file1.less";
+}
+.inner {
+  content: "inner/file2.less";
+}
+pre {
+  color: hello-from-file-3;
+}
+h2 {
+  background: url("../images/logo.png") no-repeat;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/interpolation.css b/vendor/leafo/lessphp/tests/outputs/interpolation.css
new file mode 100644
index 00000000..c3ff1f42
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/interpolation.css
@@ -0,0 +1,28 @@
+div {
+  interp1: yes;
+  interp2: yes;
+  interp3: okay;
+}
+10"yeah" {
+  color: blue;
+}
+10 {
+  color: blue;
+}
+hello world 10 {
+  color: red;
+}
+#"yeah" {
+  color: "hello 10";
+}
+[prop],
+[prop="value3"],
+[prop*="val3"],
+[|prop~="val3"],
+[*|prop$="val3"],
+[ns|prop^="val3"],
+[3^="val3"],
+[3=3],
+[3] {
+  attributes: yes;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/keyframes.css b/vendor/leafo/lessphp/tests/outputs/keyframes.css
new file mode 100644
index 00000000..cf62be11
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/keyframes.css
@@ -0,0 +1,48 @@
+@keyframes 'bounce' {
+  from {
+    top: 100px;
+    animation-timing-function: ease-out;
+  }
+  25% {
+    top: 50px;
+    animation-timing-function: ease-in;
+  }
+  50% {
+    top: 100px;
+    animation-timing-function: ease-out;
+  }
+  75% {
+    top: 75px;
+    animation-timing-function: ease-in;
+  }
+  to {
+    top: 100px;
+  }
+}
+@-webkit-keyframes flowouttoleft {
+  0% {
+    -webkit-transform: translateX(0) scale(1);
+  }
+  60%,
+  70% {
+    -webkit-transform: translateX(0) scale(.7);
+  }
+  100% {
+    -webkit-transform: translateX(-100%) scale(.7);
+  }
+}
+div {
+  animation-name: 'diagonal-slide';
+  animation-duration: 5s;
+  animation-iteration-count: 10;
+}
+@keyframes 'diagonal-slide' {
+  from {
+    left: 0;
+    top: 0;
+  }
+  to {
+    left: 100px;
+    top: 100px;
+  }
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/math.css b/vendor/leafo/lessphp/tests/outputs/math.css
new file mode 100644
index 00000000..8d425f30
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/math.css
@@ -0,0 +1,69 @@
+.unary {
+  sub: 10 -5;
+}
+.spaces {
+  sub1: 5;
+  sub2: 5;
+  add1: 15;
+  add2: 15;
+  div: 2;
+  mul1: 50;
+  mul2: 50;
+}
+.supress-division {
+  border-radius: 10px/10px;
+  border-radius: 10px/12px;
+  border-radius: hello(10px/10px) world;
+  font: 10px/30 sans-serif;
+  font: 10px/20px sans-serif;
+  font: 10px/22px sans-serif;
+  border-radius: 0 15px 15px 15px/0 50% 50% 50%;
+}
+.parens {
+  sub: 5;
+  add: 15;
+  div1: 2;
+  div2: 2;
+  mul: 50;
+}
+.keyword-names {
+  height: "hello" 25;
+}
+.negation {
+  neg1: -1px;
+  neg2: -1px;
+  neg3: -10;
+}
+.test {
+  single1: 5;
+  single2: 10;
+  single3: 10;
+  parens: 10 -2;
+  math1: 20;
+  math2: 20;
+  complex1: 71;
+  complex2: 6;
+  complex3: 6px 1em 2px 2;
+  var1: 8 4 4 4px;
+  var2: 96;
+  var3: 12;
+  complex4: 113;
+}
+.percents {
+  p1: 1000%;
+  p2: 1000%;
+  p3: 100%;
+  p4: 1000px;
+  p5: 1000%;
+  p6: 30%;
+  p7: 10%;
+  p8: 2%;
+}
+.misc {
+  x: 40px;
+  y: 40em;
+}
+.cond {
+  c1: false;
+  c2: true;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/media.css b/vendor/leafo/lessphp/tests/outputs/media.css
new file mode 100644
index 00000000..99da8c31
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/media.css
@@ -0,0 +1,70 @@
+@media screen,3D {
+  P {
+    color: green;
+  }
+}
+@media print {
+  body {
+    font-size: 10pt;
+  }
+}
+@media screen {
+  body {
+    font-size: 13px;
+  }
+}
+@media screen,print {
+  body {
+    line-height: 1.2;
+  }
+}
+@media all and (min-width: 0px) {
+  body {
+    line-height: 1.2;
+  }
+}
+@media all and (min-width: 0) {
+  body {
+    line-height: 1.2;
+  }
+}
+@media screen and (min-width: 102.5em) and (max-width: 117.9375em),screen and (min-width: 150em) {
+  body {
+    color: blue;
+  }
+}
+@media screen and (min-height: 110px) {
+  body {
+    color: red;
+  }
+}
+@media screen and (height: 100px) and (width: 110px),(size: 120px) {
+  body {
+    color: red;
+  }
+}
+@media test {
+  div {
+    height: 20px;
+  }
+}
+@media test and (hello) {
+  div {
+    color: red;
+  }
+  div pre {
+    color: orange;
+  }
+}
+@media yeah {
+  @page {
+    @media cool {
+      color: red;
+    }
+  }
+}
+@media (max-width: 599px) {
+  .helloworld {
+    color: blue;
+  }
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/misc.css b/vendor/leafo/lessphp/tests/outputs/misc.css
new file mode 100644
index 00000000..6c99cc39
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/misc.css
@@ -0,0 +1,68 @@
+color: "aaa, bbb";
+.topbar {
+  background: url(/assets/images/test/topbar.png);
+}
+.hello {
+  test: empty-function("/assets/images/test/",40%,to(#fff));
+}
+.css3 {
+  background-image: -webkit-gradient(linear,0% 0%,0% 90%,from(#E9A000),to(#A37000));
+}
+.test,
+.world {
+  border: 1px solid red;
+  color: url(http://mage-page.com);
+  string: "hello /* this is not a comment */";
+  world: "// neither is this";
+  string: 'hello /* this is not a comment */';
+  world: '// neither is this';
+  what-ever: 100px;
+  background: url(/*no comment here*/);
+}
+.urls {
+  background1: url("http://google.com");
+  background2: url(http://google.com);
+  background3: url("http://google.com");
+}
+.cool {
+  color: "aaa, bbb";
+}
+.span-17 {
+  float: left;
+}
+.span-17 {
+  width: 660px;
+}
+.x {
+  float: left;
+  width: 660px;
+}
+.hi pre {
+  color: red;
+}
+.hi pre {
+  color: blue;
+}
+.rad pre {
+  color: red;
+}
+.rad pre {
+  color: blue;
+}
+hello {
+  numbers: 1.0 0.1 .1 1.;
+  numbers: 1.0s 0.1s .1s 1.s;
+  numbers: -1s -0.1s -0.1s -1s;
+  numbers: -1 -0.1 -0.1 -1;
+}
+#string {
+  hello: 'what\'s going on here';
+  hello: 'blah blag @{ blah blah';
+  join: "3434hello";
+  join: 3434hello;
+}
+.duplicates {
+  hello: world;
+  hello: "world";
+  hello: "what";
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/mixin_functions.css b/vendor/leafo/lessphp/tests/outputs/mixin_functions.css
new file mode 100644
index 00000000..53785803
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/mixin_functions.css
@@ -0,0 +1,7 @@
+body {
+  padding: 2.0em;
+  color: red;
+  margin: 10px;
+  height: 12px;
+  border-bottom: 1px solid green;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/mixin_merging.css b/vendor/leafo/lessphp/tests/outputs/mixin_merging.css
new file mode 100644
index 00000000..f396ba92
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/mixin_merging.css
@@ -0,0 +1,42 @@
+#test1 div {
+  color:red;
+  height:10px;
+}
+#test1 p { height:10px; }
+#test2 b {
+  color:red;
+  width:1px;
+}
+#test2 a, #test2 i { width:1px; }
+#test3 a, #test3 i { width:1px; }
+#test3 b {
+  width:1px;
+  color:red;
+}
+#test4 a {
+  color:blue;
+  margin:1px;
+}
+#test4 div, #test4 html { color:blue; }
+#test5 img, #test5 strong {
+  padding:2px;
+  float:right;
+}
+#test6 div a, #test6 span a {
+  line-height:10px;
+  color:red;
+}
+#test7 div strong {
+  margin:1px;
+  color:red;
+}
+#test7 div b { color:red; }
+#test7 span strong, #test7 span b { color:red; }
+#test8 a i, #test8 b i {
+  background:red;
+  color:red;
+}
+#test8 a s, #test8 b s {
+  background:red;
+  color:blue;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/mixins.css b/vendor/leafo/lessphp/tests/outputs/mixins.css
new file mode 100644
index 00000000..cce87eb4
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/mixins.css
@@ -0,0 +1,92 @@
+.bold {
+  font-size: 20px;
+  font-weight: bold;
+}
+body #window {
+  border-radius: 10px;
+  font-size: 20px;
+  font-weight: bold;
+  line-height: 30px;
+}
+#bundle .button {
+  display: block;
+  border: 1px solid black;
+  background-color: grey;
+}
+#bundle .button:hover {
+  background-color: white;
+}
+#header a {
+  color: orange;
+  display: block;
+  border: 1px solid black;
+  background-color: grey;
+}
+#header a:hover {
+  background-color: white;
+}
+div {
+  color: blue;
+  hello: world;
+}
+div b {
+  color: blue;
+}
+body {
+  color: blue;
+  hello: world;
+}
+body b {
+  color: blue;
+}
+.hello .world {
+  color: blue;
+}
+.foobar {
+  color: blue;
+}
+.eggs {
+  foo: 1px 2px;
+  bar: 1px 2px;
+  foo: 100 land;
+  bar: 100 land;
+}
+#hello {
+  cool: one two three cool;
+}
+#hello-important {
+  cool: one two three cool !important;
+}
+#world {
+  cool: "world";
+}
+#another {
+  things: red blue green;
+  things: red blue green skip me;
+}
+#day .cool {
+  color: one two three;
+}
+#day .cool {
+  color: one two three skip me;
+}
+.mix-suffix {
+  color: red !important;
+  height: 20px !important;
+}
+.mix-suffix pre {
+  color: red;
+}
+.search-test {
+  color: #f00 !important;
+  color: #0f0 !important;
+}
+.cowboy {
+  color: blue;
+}
+.nav .nav-divider {
+  padding: 10px;
+}
+.nav-divider {
+  padding: 10px;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/nested.css b/vendor/leafo/lessphp/tests/outputs/nested.css
new file mode 100644
index 00000000..454dcfcc
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/nested.css
@@ -0,0 +1,51 @@
+#header {
+  color: black;
+}
+#header .navigation {
+  font-size: 12px;
+}
+#header .navigation .border .outside {
+  color: blue;
+}
+#header .logo {
+  width: 300px;
+}
+#header .logo:hover {
+  text-decoration: none;
+}
+a b ul li {
+  color: green;
+}
+div .cool {
+  color: green;
+}
+p .cool span {
+  color: yellow;
+}
+div another {
+  color: green;
+}
+p another span {
+  color: yellow;
+}
+b .something {
+  color: blue;
+}
+b.something {
+  color: blue;
+}
+.foo .bar .qux,
+.foo .baz .qux {
+  display: block;
+}
+.qux .foo .bar,
+.qux .foo .baz {
+  display: inline;
+}
+.qux .foo .bar .biz,
+.qux .foo .baz .biz {
+  display: none;
+}
+b hello [x="&yeah"] {
+  color: red;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/nesting.css b/vendor/leafo/lessphp/tests/outputs/nesting.css
new file mode 100644
index 00000000..804a56bf
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/nesting.css
@@ -0,0 +1,6 @@
+#header .navigation .border .outside { color:blue; }
+#header .navigation { font-size:12px; }
+#header .logo:hover { text-decoration:none; }
+#header .logo { width:300px; }
+#header { color:black; }
+a b ul li { color:green; }
diff --git a/vendor/leafo/lessphp/tests/outputs/pattern_matching.css b/vendor/leafo/lessphp/tests/outputs/pattern_matching.css
new file mode 100644
index 00000000..215371b0
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/pattern_matching.css
@@ -0,0 +1,72 @@
+.class {
+  color: #a2a2a2;
+  display: block;
+}
+.zero {
+  zero: 0;
+  one: 1;
+  two: 2;
+  three: 3;
+}
+.one {
+  one: 1;
+  one-req: 1;
+  two: 2;
+  three: 3;
+}
+.two {
+  two: 2;
+  three: 3;
+}
+.three {
+  three-req: 3;
+  three: 3;
+}
+.left {
+  left: 1;
+}
+.right {
+  right: 1;
+}
+.border-right {
+  color: black;
+  border-right: 4px;
+}
+.border-left {
+  color: black;
+  border-left: 4px;
+}
+.only-right {
+  right: 33;
+}
+.only-left {
+  left: 33;
+}
+.left-right {
+  both: 330;
+}
+#hola {
+  color: blue;
+}
+#defaults_1 {
+  height: one;
+  height: two;
+  height: three;
+  height: four;
+}
+.thing {
+  color: red;
+}
+#aa {
+  color: green;
+  color: blue;
+  color: red;
+}
+#bb {
+  color: green;
+  color: blue;
+  color: red;
+}
+#cc {
+  color: blue;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/scopes.css b/vendor/leafo/lessphp/tests/outputs/scopes.css
new file mode 100644
index 00000000..ea2a4573
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/scopes.css
@@ -0,0 +1,11 @@
+body div other world {
+  height: 50;
+}
+div other world {
+  height: 50;
+}
+pre {
+  height: 10;
+  height: 11;
+  height: 12;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/selector_expressions.css b/vendor/leafo/lessphp/tests/outputs/selector_expressions.css
new file mode 100644
index 00000000..71d4a5d8
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/selector_expressions.css
@@ -0,0 +1,25 @@
+something blue,
+world {
+  color: blue;
+}
+.div (3434) {
+  height: 100px;
+}
+.div cool red {
+  height: 4000px;
+}
+.span5 {
+  color: 15;
+}
+.span4 {
+  color: 14;
+}
+.span3 {
+  color: 13;
+}
+.span2 {
+  color: 12;
+}
+.span1 {
+  color: 11;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/site_demos.css b/vendor/leafo/lessphp/tests/outputs/site_demos.css
new file mode 100644
index 00000000..3428ad3a
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/site_demos.css
@@ -0,0 +1,76 @@
+default .underline {
+  border-bottom: 1px solid green;
+}
+default #header {
+  color: black;
+  border: 1px solid #dd44dd;
+}
+default #header .navigation {
+  font-size: 12px;
+}
+default #header .navigation a {
+  border-bottom: 1px solid green;
+}
+default #header .logo {
+  width: 300px;
+}
+default #header .logo:hover {
+  text-decoration: none;
+}
+variables .variables {
+  width: 14cm;
+  height: 24px;
+  color: #888;
+  background: #6c94be;
+  font-family: "Trebuchet MS", Verdana, sans-serif;
+}
+mixins .bordered {
+  border-top: dotted 1px black;
+  border-bottom: solid 2px black;
+}
+mixins #menu a {
+  color: #111;
+  border-top: dotted 1px black;
+  border-bottom: solid 2px black;
+}
+mixins .post a {
+  color: red;
+  border-top: dotted 1px black;
+  border-bottom: solid 2px black;
+}
+nested-rules #header {
+  color: black;
+}
+nested-rules #header .navigation {
+  font-size: 12px;
+}
+nested-rules #header .logo {
+  width: 300px;
+}
+nested-rules #header .logo:hover {
+  text-decoration: none;
+}
+namespaces #bundle .button {
+  display: block;
+  border: 1px solid black;
+  background-color: grey;
+}
+namespaces #bundle .button:hover {
+  background-color: white;
+}
+namespaces #header a {
+  color: orange;
+  display: block;
+  border: 1px solid black;
+  background-color: grey;
+}
+namespaces #header a:hover {
+  background-color: white;
+}
+mixin-functions body {
+  padding: 2.0em;
+  color: red;
+  margin: 10px;
+  height: 12px;
+  border-bottom: 1px solid green;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs/variables.css b/vendor/leafo/lessphp/tests/outputs/variables.css
new file mode 100644
index 00000000..c4857cc6
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs/variables.css
@@ -0,0 +1,19 @@
+outer1: 44px;
+outer2: 44px;
+.variables {
+  width: 14cm;
+  height: 24px;
+  margin-top: -20px;
+  margin-bottom: 30px;
+  color: #888899;
+  background: #6c94be;
+  font-family: "Trebuchet MS", Verdana, sans-serif;
+  margin: 3px;
+  font: 10px/12px serif;
+  font: 120%/120% serif;
+}
+.external {
+  color: #888;
+  border: 1px solid #3326cc;
+  background: rgba(23,68,149,0.5);
+}
diff --git a/vendor/leafo/lessphp/tests/outputs_lessjs/mixins-args.css b/vendor/leafo/lessphp/tests/outputs_lessjs/mixins-args.css
new file mode 100644
index 00000000..0a8e6bee
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs_lessjs/mixins-args.css
@@ -0,0 +1,113 @@
+#hidden {
+  color: transparent;
+}
+#hidden1 {
+  color: transparent;
+}
+.two-args {
+  color: blue;
+  width: 10px;
+  height: 99%;
+  border: 2px dotted black;
+}
+.one-arg {
+  width: 15px;
+  height: 49%;
+}
+.no-parens {
+  width: 5px;
+  height: 49%;
+}
+.no-args {
+  width: 5px;
+  height: 49%;
+}
+.var-args {
+  width: 45;
+  height: 17%;
+}
+.multi-mix {
+  width: 10px;
+  height: 29%;
+  margin: 4;
+  padding: 5;
+}
+body {
+  padding: 30px;
+  color: #f00;
+}
+.scope-mix {
+  width: 8;
+}
+.content {
+  width: 600px;
+}
+.content .column {
+  margin: 600px;
+}
+#same-var-name {
+  radius: 5px;
+}
+#var-inside {
+  width: 10px;
+}
+.arguments {
+  border: 1px solid black;
+  width: 1px;
+}
+.arguments2 {
+  border: 0px;
+  width: 0px;
+}
+.arguments3 {
+  border: 0px;
+  width: 0px;
+}
+.arguments4 {
+  border: 0 1 2 3 4;
+  rest: 1 2 3 4;
+  width: 0;
+}
+.edge-case {
+  border: "{";
+  width: "{";
+}
+.slash-vs-math {
+  border-radius: 0.4px;
+  border-radius: 0.5px;
+  border-radius: 6px;
+}
+.comma-vs-semi-colon {
+  one: a;
+  two: b, c;
+  one: d, e;
+  two: f;
+  one: g;
+  one: h;
+  one: i;
+  one: j;
+  one: k;
+  two: l;
+  one: m, n;
+  one: o, p;
+  two: q;
+  one: r, s;
+  two: t;
+}
+#named-conflict {
+  four: a, 11, 12, 13;
+  four: a, 21, 22, 23;
+}
+.test-mixin-default-arg {
+  defaults: 1px 1px 1px;
+  defaults: 2px 2px 2px;
+}
+.selector {
+  margin: 2, 2, 2, 2;
+}
+.selector2 {
+  margin: 2, 2, 2, 2;
+}
+.selector3 {
+  margin: 4;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs_lessjs/mixins-named-args.css b/vendor/leafo/lessphp/tests/outputs_lessjs/mixins-named-args.css
new file mode 100644
index 00000000..e460aa10
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs_lessjs/mixins-named-args.css
@@ -0,0 +1,27 @@
+.named-arg {
+  color: blue;
+  width: 5px;
+  height: 99%;
+  args: 1px 100%;
+  text-align: center;
+}
+.class {
+  width: 5px;
+  height: 19%;
+  args: 1px 20%;
+}
+.all-args-wrong-args {
+  width: 10px;
+  height: 9%;
+  args: 2px 10%;
+}
+.named-args2 {
+  width: 15px;
+  height: 49%;
+  color: #646464;
+}
+.named-args3 {
+  width: 5px;
+  height: 29%;
+  color: #123456;
+}
diff --git a/vendor/leafo/lessphp/tests/outputs_lessjs/strings.css b/vendor/leafo/lessphp/tests/outputs_lessjs/strings.css
new file mode 100644
index 00000000..f7b9c27d
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/outputs_lessjs/strings.css
@@ -0,0 +1,40 @@
+#strings {
+  background-image: url("http://son-of-a-banana.com");
+  quotes: "~" "~";
+  content: "#*%:&^,)!.(~*})";
+  empty: "";
+  brackets: "{" "}";
+  escapes: "\"hello\" \\world";
+  escapes2: "\"llo";
+}
+#comments {
+  content: "/* hello */ // not-so-secret";
+}
+#single-quote {
+  quotes: "'" "'";
+  content: '""#!&""';
+  empty: '';
+  semi-colon: ';';
+}
+#escaped {
+  filter: DX.Transform.MS.BS.filter(opacity=50);
+}
+#one-line {
+  image: url(http://tooks.com);
+}
+#crazy {
+  image: url(http://), "}", url("http://}");
+}
+#interpolation {
+  url: "http://lesscss.org/dev/image.jpg";
+  url2: "http://lesscss.org/image-256.jpg";
+  url3: "http://lesscss.org#445566";
+  url4: "http://lesscss.org/hello";
+  url5: "http://lesscss.org/54.4px";
+}
+.mix-mul-class {
+  color: blue;
+  color: red;
+  color: black;
+  color: orange;
+}
diff --git a/vendor/leafo/lessphp/tests/sort.php b/vendor/leafo/lessphp/tests/sort.php
new file mode 100644
index 00000000..70b907ea
--- /dev/null
+++ b/vendor/leafo/lessphp/tests/sort.php
@@ -0,0 +1,57 @@
+<?php
+error_reporting(E_ALL);
+
+require realpath(dirname(__FILE__)).'/../lessc.inc.php';
+
+// sorts the selectors in stylesheet in order to normalize it for comparison
+
+$exe = array_shift($argv); // remove filename
+
+if (!$fname = array_shift($argv)) {
+	$fname = "php://stdin";
+}
+
+class lesscNormalized extends lessc {
+	public $numberPrecision = 3;
+
+	public function compileValue($value) {
+		if ($value[0] == "raw_color") {
+			$value = $this->coerceColor($value);
+		}
+
+		return parent::compileValue($value);
+	}
+}
+
+class SortingFormatter extends lessc_formatter_lessjs {
+	function sortKey($block) {
+		if (!isset($block->sortKey)) {
+			sort($block->selectors, SORT_STRING);
+			$block->sortKey = implode(",", $block->selectors);
+		}
+
+		return $block->sortKey;
+	}
+
+	function sortBlock($block) {
+		usort($block->children, function($a, $b) {
+			$sort = strcmp($this->sortKey($a), $this->sortKey($b));
+			if ($sort == 0) {
+				// TODO
+			}
+			return $sort;
+		});
+
+	}
+
+	function block($block) {
+		$this->sortBlock($block);
+		return parent::block($block);
+	}
+
+}
+
+$less = new lesscNormalized();
+$less->setFormatter(new SortingFormatter);
+echo $less->parse(file_get_contents($fname));
+