I made a userstyle for mastodon, based on work by @trwnh and @numimyon. I'd post a screenshot, but I don't want you to read all my toots!
You can check it out here: https://pastebin.com/raw/2RMwbxaB
What does it do differently?
It makes stuff take up less space (I like to have more columns open) and adds some nice colors to the headers.
Probably other stuff, too?
It allows me to have 4 columns open (+ Drawer & Getting Started) on a 1080p screen without horizontal scrolling!