Build interfaces with Tailwind CSS v4 using CSS-based configuration, layouts that adapt to their container, and shared color and spacing values. The skill guides responsive styling, dark mode, and reusable component patterns.
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Tailwind CSS v4 principles. CSS-first configuration, container queries, modern patterns, design token architecture.
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Modern utility-first CSS with CSS-native configuration.
| v3 (Legacy) | v4 (Current) |
|---|---|
tailwind.config.js | CSS-based @theme directive |
| PostCSS plugin | Oxide engine (10x faster) |
| JIT mode | Native, always-on |
| Plugin system | CSS-native features |
@apply directive | Still works, discouraged |
| Concept | Description |
|---|---|
| CSS-first | Configuration in CSS, not JavaScript |
| Oxide Engine | Rust-based compiler, much faster |
| Native Nesting | CSS nesting without PostCSS |
| CSS Variables | All tokens exposed as --* vars |
@theme {
/* Colors - use semantic names */
--color-primary: oklch(0.7 0.15 250);
--color-surface: oklch(0.98 0 0);
--color-surface-dark: oklch(0.15 0 0);
/* Spacing scale */
--spacing-xs: 0.25rem;
--spacing-sm: 0.5rem;
--spacing-md: 1rem;
--spacing-lg: 2rem;
/* Typography */
--font-sans: 'Inter', system-ui, sans-serif;
--font-mono: 'JetBrains Mono', monospace;
}
| Action | Use When |
|---|---|
| Extend | Adding new values alongside defaults |
| Override | Replacing default scale entirely |
| Semantic tokens | Project-specific naming (primary, surface) |
| Type | Responds To |
|---|---|
Breakpoint (md:) | Viewport width |
Container (@container) | Parent element width |
| Pattern | Classes |
|---|---|
| Define container | @container on parent |
| Container breakpoint | @sm:, @md:, @lg: on children |
| Named containers | @container/card for specificity |
| Scenario | Use |
|---|---|
| Page-level layouts | Viewport breakpoints |
| Component-level responsive | Container queries |
| Reusable components | Container queries (context-independent) |
| Prefix | Min Width | Target |
|---|---|---|
| (none) | 0px | Mobile-first base |
sm: | 640px | Large phone / small tablet |
md: | 768px | Tablet |
lg: | 1024px | Laptop |
xl: | 1280px | Desktop |
2xl: | 1536px | Large desktop |
w-full md:w-1/2 lg:w-1/3| Method | Behavior | Use When |
|---|---|---|
class | .dark class toggles | Manual theme switcher |
media | Follows system preference | No user control |
selector | Custom selector (v4) | Complex theming |
| Element | Light | Dark |
|---|---|---|
| Background | bg-white | dark:bg-zinc-900 |
| Text | text-zinc-900 | dark:text-zinc-100 |
| Borders | border-zinc-200 | dark:border-zinc-700 |
| Pattern | Classes |
|---|---|
| Center (both axes) | flex items-center justify-center |
| Vertical stack | flex flex-col gap-4 |
| Horizontal row | flex gap-4 |
| Space between | flex justify-between items-center |
| Wrap grid | flex flex-wrap gap-4 |
| Pattern | Classes |
|---|---|
| Auto-fit responsive | grid grid-cols-[repeat(auto-fit,minmax(250px,1fr))] |
| Asymmetric (Bento) | grid grid-cols-3 grid-rows-2 with spans |
| Sidebar layout | grid grid-cols-[auto_1fr] |
Note: Prefer asymmetric/Bento layouts over symmetric 3-column grids.
| Format | Advantage |
|---|---|
| OKLCH | Perceptually uniform, better for design |
| HSL | Intuitive hue/saturation |
| RGB | Legacy compatibility |
| Layer | Example | Purpose |
|---|---|---|
| Primitive | --blue-500 | Raw color values |
| Semantic | --color-primary | Purpose-based naming |
| Component | --button-bg | Component-specific |
| Type | Recommended |
|---|---|
| Sans | 'Inter', 'SF Pro', system-ui, sans-serif |
| Mono | 'JetBrains Mono', 'Fira Code', monospace |
| Display | 'Outfit', 'Poppins', sans-serif |
| Class | Size | Use |
|---|---|---|
text-xs | 0.75rem | Labels, captions |
text-sm | 0.875rem | Secondary text |
text-base | 1rem | Body text |
text-lg | 1.125rem | Lead text |
text-xl+ | 1.25rem+ | Headings |
| Class | Effect |
|---|---|
animate-spin | Continuous rotation |
animate-ping | Attention pulse |
animate-pulse | Subtle opacity pulse |
animate-bounce | Bouncing effect |
| Pattern | Classes |
|---|---|
| All properties | transition-all duration-200 |
| Specific | transition-colors duration-150 |
| With easing | ease-out or ease-in-out |
| Hover effect | hover:scale-105 transition-transform |
| Signal | Action |
|---|---|
| Same class combo 3+ times | Extract component |
| Complex state variants | Extract component |
| Design system element | Extract + document |
| Method | Use When |
|---|---|
| React/Vue component | Dynamic, JS needed |
| @apply in CSS | Static, no JS needed |
| Design tokens | Reusable values |
| Don't | Do |
|---|---|
| Arbitrary values everywhere | Use design system scale |
!important | Fix specificity properly |
Inline style= | Use utilities |
| Duplicate long class lists | Extract component |
| Mix v3 config with v4 | Migrate fully to CSS-first |
Use @apply heavily | Prefer components |
| Principle | Implementation |
|---|---|
| Purge unused | Automatic in v4 |
| Avoid dynamism | No template string classes |
| Use Oxide | Default in v4, 10x faster |
| Cache builds | CI/CD caching |
Remember: Tailwind v4 is CSS-first. Embrace CSS variables, container queries, and native features. The config file is now optional.
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Create interactive 3D scenes for websites, including product views and scroll-driven animations. Covers choosing Three.js, React Three Fiber, or Spline, preparing lightweight models, showing loading progress, and adapting experiences for mobile devices.
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Plan A/B tests that compare page or product changes, with clear hypotheses, sample sizes, success metrics, and traffic allocation. Get a structured test plan and guidance for interpreting results and deciding what to try next.
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Prepare an academic CV for faculty, postdoctoral, or research applications. Organize publications, grants, teaching, and research experience, with section order and formatting adapted to the role and academic field.
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Audit and improve web accessibility using WCAG 2.1 guidelines. Covers image descriptions, color contrast, keyboard controls, forms, and screen reader support, with code examples and automated and manual checks to guide fixes.
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Audit websites for accessibility barriers and improve image descriptions, color contrast, forms, keyboard navigation, and screen reader support. Provides code examples and automated and manual testing guidance for work toward WCAG 2.1 AA or AAA accessibility standards.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.
Design autonomous agents for Claude Code plugins, including when they should run, what tools they may use, and how they should respond. Provides configuration templates, prompt guidance, and validation steps for creating agent files.
한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.