Sass

Byline:

Sass is the most mature, stable, and powerful professional grade CSS extension language in the world.

Key links

• 🏠 Homepage: https://sass-lang.com/
• 📗 Docs: https://sass-lang.com/documentation

From the docs:

Sass is a stylesheet language that’s compiled to CSS.

It allows you to use variables, nested rules, mixins, functions, and more, all with a fully CSS-compatible syntax.

Sass helps keep large stylesheets well-organized and makes it easy to share design within and across projects.