tailwind-css
Tailwind CSS (v4)
Overview
Tailwind CSS is a utility-first CSS framework. Style by combining single-purpose classes in markup.
We use Tailwind v4 only. There is no tailwind.config.js, tailwind.config.ts, or tailwind.config.mjs. Configuration is done in CSS via @import "tailwindcss" and the @theme directive, plus the Vite or PostCSS plugin.
- Entry: One main CSS file with
@import "tailwindcss"; - Build:
@tailwindcss/vite(Vite) or@tailwindcss/postcss(Next.js) - Theme:
@theme { ... }in that same CSS file (or imported CSS). No JS config.
Core principle: Prefer utility classes in markup; extend with @theme and custom CSS when needed. Never suggest or create tailwind.config.* or content/theme in a config file.
Installation
Next.js (App Router, 15+)
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