How to describe a CSS file to another developer so they can use it?

I think this is one of the bigger issues with CSS technology. This question was raised by one of my co-workers. If I were to design the most beautiful CSS possible, but then I left the company - how would my replacement begin to use my 1200 line CSS document?

Do we need the equivalent of a javadoc for css files? A meta-file for css is an interesting proposition...

A musing.