OH but you NEED a CSS minification tool! You HAVE TO HAVE IT!!!!1111

One way to keep things simple while still getting the benefits of minification is to code your whole simply, and then later install an optimization package like mod_pagespeed on the server. This keeps your code and flow simple, and then later on when it's worth your time you can install/enable the optimizer.

(Disclaimer: I'm the TL for mod_pagespeed.)