Change font colors & sizes on WP eCommerce

I’ve tried just about everything recommended in other posts, but nothing seems to work. I want to change the category & product sizes & colors. I have been posting the code in Appearance > Theme Options > CSS Styles. Other code I’ve posted is working, but nothing I do corrects the font. I’m sure it’s easy.

https://shop.northcountrybotanicals.com/products-page/outdoor/