Surely everyone has been using a homegrown version of this since they started with css? We use a build script to generate our css files with things such as: .h

Surely everyone has been using a homegrown version of this since they started with css? We use a build script to generate our css files with things such as: .header { background: @BACKGROUND } .maintable { margin-left: 5+@DEFAULT_MARGIN } I mean, without it you are left writing it all manually! Good to see something open source though, and I love the hierarchy.