I took @hoh's userstyle as basis and changed a few things here and there. It supports all 3 site themes.
The Favorite Studios section is cleaner and more organized, while keeping the original Anilist look. It also supports all 3 site themes.
Has a darker look, that's easier on the eyes. The whole site is aligned in the center now.
If you happen to use either of those styles, feel free to hit me up, in case things need to be adjusted, or just give some feedback!