Jumping off this post
I too think that the css structure could be a bit more clear.
I've spent much of the day figuring out what controls what in products_results.php in Powerstore. You'll have to admit that the css is complex, in part because it spans so many different css files.
Maybe I'm wrong, but I think that it could be made more concise.
Also, our friends at ProjectSeven include a definition of all the css rules and what they control and what can't be changed in the users guides they supply with most of their products.
Something similar would be very much appreciated.
Yours in appreciation for all the great products