There's a forum request for the IDE PhpED to provide syntax support for SCSS and possibly LESS. The response from the PhpED folks has been that they are not able to find a formal description of the grammar similar to the CSS grammar described here: http://www.w3.org/TR/CSS21/grammar.html
Does anyone know where a formal description can be found? There are lot of PhpED users (including me) who would like SCSS support.
It seems that phpEd will support SCSS soon (in version 14) so developers managed to find grammar. But there is no info about LESS or SASS syntax.