@import "foo.css";
@import 'bar/foo.css' print;
@import '/css/foo.css'; /* abs, should not alter */
@import 'http://foo.com/css/foo.css'; /* abs, should not alter */
@import url(../foo.css) tv, projection;
@import url("/css/foo.css"); /* abs, should not alter */
@import url(/css2/foo.css); /* abs, should not alter */
@import url(data:image/gif;base64,AAAA); /* data, should not alter */
foo {background:url('bar/foo.png')}
foo {background:url('http://foo.com/css/foo.css');} /* abs, should not alter */
foo {background:url("//foo.com/css/foo.css");} /* protocol relative, should not alter */
foo {background:url(data:image/gif;base64,AAAA);} /* data, should not alter */