What problem does it solve?
Tailwind CSS v4 requires a different mental model than v3 because configuration is now CSS-first, tokens are more expressive, and many build-time behaviors are handled automatically. This Skill resolves the “what changed and how do I structure my theme/utilities now?” problem so you can implement a maintainable Tailwind v4 design system quickly.
Core Features & Use Cases
- CSS-first configuration with @theme: define colors, typography, spacing, breakpoints, radius, shadows, and other tokens directly in CSS.
- Custom utilities with @utility and variants with @custom-variant: create reusable functional/static utilities and composable state/responsive variants.
- Modern best practices for 2025/2026: OKLCH semantic color design, fluid typography and spacing, token organization, and safer responsive class patterns.
- Migration guidance from v3 to v4: covers key behavioral differences like ring/border defaults, autoprefixing, nesting, and content detection.
Quick Start
Tell your AI to set up a Tailwind CSS v4 theme using an @import "tailwindcss" CSS entry point and an @theme block with OKLCH semantic tokens, then propose a small set of @utility utilities for spacing and text readability.
