Different layouts in subcategory listing pages

Hello everybody.

Is it possible in any way to use a different layout in subcategory listing pages depending which category is in use?
For example: the "T-shirt" subcategory listing page have a different background or number of columns that the "Jeans" subcategory listing page? (im talkin about the category listing page in main area, not the sidebox).

Now Im able to do only the changes which effect on every subgategory listing page.

Any help much appreciated!!!

Let me clarify that all I really would like to do is to have just a different background in different subcategory listing pages. I have understood that it is possible to change the style of each page by CSS, but is it possible in subcategory listing pages? If it is, please let me know how.

In your /css folder there is a css readme file...start by reading this as it explains it most clearly.

I read it, but it is still unclear to me, which one to use:

page_name.css // changes to one page - And with what to replace "page_name" when applyin the CSS in subcategory listing page...?

OR

c_????.css // changes to all info pages in a category - And with what to replace "????"when applyin the CSS in subcategory listing page..?

Nevermind, i got it. I just use c_??_??.css and replace ??'s with category numbers..