Starting conversion to SCSS

I did quite a bit on the header, but I still have a long ways to go. As
it is a work in progress, the code is a mess. I promise I will have it
cleaned up by the time I am done. :P

In the meantime, why not go learn SCSS? http://sass-lang.com/guide

Why SCSS? Because it's awesome and way more fun to write than CSS! (I'm
using http://sassmeister.com/ for writing it all. I'm not going to merge
it with the CSS until I finish)