Support of other preprocessors

[Lonelind]

Are you planning extend your system on other preprocessors (such as Less or Stylus) or this is very difficult to build any because of Sass-only features?

And, have you thought about any other BEM notations (from classic, where '_' is used for modifiers to any 'magic' ones with weird element/modifier delimeters)?

I use Stylus with classic BEM notation and this is very difficult to use this grid as native module. Okay, I can replace every '--' with '_', but I need either translate it to Stylus or manually pre-compile it to pure css and lose some useful features if I want to use it.