http://www.w3.org/TR/css3-syntax/#at-rules http://www.w3.org/TR/css3-syntax/#at-rules As I understand it, at-rules are basically directives to the CSS parser a

http://www.w3.org/TR/css3-syntax/#at-rules http://www.w3.org/TR/css3-syntax/#at-rules As I understand it, at-rules are basically directives to the CSS parser and, according to the spec, should be ignored if the parser does not recognize the identifier. Given that, the use of at-rules for variable names has always seemed, IMVHO, to break the purpose of at-rules.