This is a port of the Sourcehut stylesheets, which are based on Bootstrap CSS. Stylesheets have been borrowed from https://git.sr.ht/~sircmpwn/core.sr.ht. DeVault CSS is minimalist, retro and lightweight.
You must have Sass installed globally, through npm i -g sass (you might need sudo), and then, you're ready to go!
sass scss/base.scss dist/css/base.css