Complete list of CSS classes and id’s ?

Hey…
I have been working on my own design for WordPress, first making it from scratch with my own css and html, and then trying to merge/implement it in the standard WordPress layout.
That took quite some time, but at the end I got my design almost like I wanted it, althoug it could have been easier if I had been able to find a complete list of css classes, id’s and html tags along with a description. Mostly because there were tags that I could not see the purpose of, and tags that were not defined in the wp-layout.css but existed in the design.
Does anyone know if there is a complete list of all css classes, id’s and html tags, along with a description and location (in which files they are located)?