Depending on your use-case, maybe a static site generator could work for you? Something like Jekyll or Hugo. Both can be hosted for free on Github Pages (and I think Gitlab has something similar). While you still need some technical know-how in order to set it up, you can write your content in Markdown, which is a lot easier to write than HTML, and there are a lot of themes available out there you can use, so no need for CSS.

o7

Thanks, I might give it a try! For now I’m using this theme. It looks quite nice and it also works for gtk4/libadwaita.

Which GTK theme is that?