You add a browser extension that lets you write code that runs on any page you want. This video should be a decent explainer: https://www.youtube.com/watch?v=6DmQ_V9ZRlk

Maybe you could make your changes as a userscript first and let people play around with it? I’d def test it out :)

Fun fact: there used to be many more lemmy themes that were pretty cool but they got ripped out as too hard to maintain a while ago.

That’s pretty nice! I think that the theme could def use a little love. I think the devs said at one point that they want to make it so any bootstrap theme could be imported but for now it’s just the two themes.

Are you a designer?