I've searched & searched for the answer to this & cannot find it at all, please help!
How to I modify the top-level category links in the category sidebox in this template?

I've tried adding a.category-top, I've tried #categories a.category-top, I've tried just about every suggestion in this thread:
http://www.zen-cart.com/forum/showthread.php?t=71511
& none of them have created ANY change (but editing other things in the stylesheet DO work, I'm not editing an unused file). I installed the ch_categories mod that keeps all categories open, but this mod still calls the tpl_categories.php file (which has not been modified), so that should not be causing problems. I am just so frustrated that I haven't been able to figure this out on my own.

Is there a different class being used on this template that I should be changing? Or something else?