Change font-size on category pages

Hi guys, I’ve been doing a lot of editing with the templates but I just cant figure out where the stats for the font size on the category pages is set. It bothers me that I have a different font size on the home and the static pages in comparison to the category pages. i.e here: https://www.pizzaspotz.com/category/pizza-lists/

I’ve looked the style.css up and down but I’m no expert. I just want it the same normale font size on every page of the blog

[Moderator Note: No bumping, thank you.]