Remove app.css from published website

Hi, I’m trying to theme my published site and it’s an absolute nightmare with the amount of variables in the app.css file. I get it, variables are great for re-theming apps, but I just need a pretty simple stylesheet that ideally has properties listed per-element, as opposed to app.css’s massive lists of elements listed out over and over again for different properties.

I can manually go through and overwrite everything, but it’s a nightmare within a nightmare to hunt down each master variable and then decide if I can actually change that variable or if I have to do a manual override every time. Like…even just changing the body font-family took a while.

Ideally, I can just copy app.css and fork it without having to worry about a second stylesheet messing with mine when I remove all the extra stuff I don’t need. For example: