eshop css confusion

Any help with these issues from the eshop genius circle is much appreciated.

I installed eshop 5.7.9 from my WordPress installation (3.0.1).
Then I built some product pages.
I have the “Add to Cart” window with the “Order yada, yada, yada” line and the Options line on the pages.

Now I’m trying to change the styling for the “Add to Cart” “window” through the eshop.css file, and nothing is working.

Typically, if I want to change something in a style sheet I’ve never seen, I’ll search the sheet for a keyword—“background”—if I don’t find what I’m looking for immediately, and start looking at or changing this variable until something changes.

I’ve tried every “background” I can find in this eshop.css style sheet and none of them change anything in the Add to Cart window or the Add to Cart button.

I read a post from the developer that said check the “form.iput…” code in the style sheet—no such code exists in the style sheet I have.

Am I doin’ something wrong? I mean, this should be a no-brainer—you just find the code and change it—however; I’m beginning to think I don’t have a brain! I’m using eshop just like it installed through my version of WP. Everything went fine, but I can’t find the eshop.css code to change anything in the Add to Cart window on my product pages.

Anyone have any wisdom for a first-time eshop user?

Thanks