To add on Vencord/Vesktop, copy the permanent URL of your desired CSS files below, and paste them into Settings → Themes → Online Themes.
Permanent links to CSS files:
all.css: https://gist.githubusercontent.com/TheEvilSkeleton/7b8199d66a01a3c6f5b3481fb64ce3db/raw/all.cssadd-outline-in-user-profiles.css: https://gist.githubusercontent.com/TheEvilSkeleton/7b8199d66a01a3c6f5b3481fb64ce3db/raw/add-outline-in-user-profiles.cssremove-annoying-nitro-distractions.css: https://gist.githubusercontent.com/TheEvilSkeleton/7b8199d66a01a3c6f5b3481fb64ce3db/raw/remove-annoying-nitro-distractions.cssclamp-width.css: https://gist.githubusercontent.com/TheEvilSkeleton/7b8199d66a01a3c6f5b3481fb64ce3db/raw/clamp-width.cssfont-improvements.css: https://gist.githubusercontent.com/TheEvilSkeleton/7b8199d66a01a3c6f5b3481fb64ce3db/raw/font-improvements.css