Web designer Elliot Jay Stocks has a beautifully designed website, but I was actually brought to his site because I heard about his CSS. Because his CSS is beautiful.
This beautiful CSS file is full of great things. There are nine sections, all cleverly indented in a way I've never seen. Each well-commented section has a clear heading, each with clear CSS that uses a bunch of upcoming CSS features I'd never heard of. It's even got a table of contents!
I can't imagine what his Stylus code might look like.
Go take a look at the whole file. It's...it's beautiful.