Discard unused counter styles, keyframes and fonts.

Use Custom Properties Queries in CSS

Correctly declare progressive enhancements for CSS Custom Properties.

Shape utilities for Material Components for the web

CSS color - Resolve and convert CSS colors.

Open Web data by the Mozilla Developer Network

mjml-head-html-attributes

MUI System is a set of CSS utilities to help you build custom designs more efficiently. It makes it possible to rapidly lay out custom designs.

> [!WARNING] > This package use [CSS Custom Highlight API](https://developer.mozilla.org/en-US/docs/Web/API/CSS_Custom_Highlight_API)

Transform style sheet to be consumed by the LWC engine

A lightweight React Hook intended mainly for AI chat applications, for smoothly sticking to bottom of messages

PostCSS plugin to transform CSS Custom Properties(CSS variables) syntax into a static representation

List of standard and browser specific CSS functions.

A CSS parser, transformer, and minifier written in Rust

UnoCSS transformer for `@apply` directive

Polyfill for Scoped CSS

Detect whether a terminal supports color

Zero-runtime atomic CSS framework for vanilla-extract

a CSS selector parser

Detect/remove browser hacks from CSS files.