What problem does it solve? Setting up a consistent design system with Tailwind CSS v4 requires learning its new CSS-first configuration model, which differs significantly from v3's JavaScript config. This Skill provides ready-to-use patterns for design tokens, component variants, dark mode, and animations so you avoid misconfigurations and inconsistent UI patterns. ## Core Features & Use Cases - CSS-first theming with @theme: Define semantic color tokens in OKLCH, radius scales, and animation keyframes directly in CSS, including dark mode overrides via @custom-variant. - Component patterns with CVA and React 19: Build type-safe Button, Card, Input, Label, Grid, and Dialog components using class-variance-authority, Radix UI primitives, and ref-as-prop (no forwardRef). - v3 to v4 migration guidance: Follow a 10-item checklist covering config replacement, directive changes, dark mode, animations, and React 19 updates. - Use Case: You are standardizing UI across a React app. Use this Skill to generate a themed token file, a variant-driven Button component, and a ThemeProvider with system preference detection in one pass. ## Quick Start Ask the AI to create a Tailwind v4 design system with semantic color tokens, a CVA-based Button component, and class-based dark mode for your React project.