CSS lacks things like variables, functions, etc ...
Clojure is great for writing DSLS.
I\'m currently already using Clojure+Ring+Compojure for
Looking at http://clojure-libraries.appspot.com/cat/Web+Server+Libraries and http://clojure.org/libraries, there are what it looks like the options are:
I haven't used any of them, but it looks like you'll probably get the best results with cssgen or clj-style.