Tailwind

Tailwind CSS is the utility-first CSS framework: rapidly build modern UIs by composing classes directly in your HTML.

This is a utility-first CSS framework: you build complex designs by composing low-level classes (like `flex`, `pt-4`, and `text-center`) right in your markup. It eliminates the need for writing custom CSS from scratch, significantly accelerating front-end development. The framework is highly configurable and leverages a powerful Just-In-Time (JIT) engine to generate only the CSS you actually use, resulting in production bundles often under 10kB.

https://tailwindcss.com