Hi Spencer,
We don’t offer much support for customizations here, but I’m curious – can you elaborate a bit on exactly what you mean by your description of things here?
In the meantime, there are two things I’d recommend exploring – first is our official Themer’s Guide, which offers a great overview of our templating system so that you can dive into your theme and do what you mentioned wanting to do here and customize the category template. Check that out here → https://theeventscalendar.com/knowledgebase/themers-guide/
However, customizing CSS is definitely the recommended choice here. If you can already do that, then I’d recommend doing that since it’s much easier to tweak CSS and maintain it as you update your plugins and theme over time, whereas customizing templates is usually pretty simple too, but more likely to have substantial changes over time.
Cheers,
George