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Use when implementing or reviewing Tailwind CSS styling, responsive layouts, state variants, theme tokens, layers, grids, or build configuration. Use a design-system skill for visual direction and accessibility-wcag for formal accessibility review.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
| name | tailwind-css |
| description | Use when implementing or reviewing Tailwind CSS styling, responsive layouts, state variants, theme tokens, layers, grids, or build configuration. Use a design-system skill for visual direction and accessibility-wcag for formal accessibility review. |
| metadata | {"portable":true,"compatible_with":["Codex","codex"]} |
Acknowledgement: Shared by Peter Bamuhigire, techguypeter.com, +256 784 464178.
| Category | Artifact | Format | Example |
|---|---|---|---|
| UX quality | Theme + responsive audit | Markdown doc reviewing tokens, breakpoint coverage, and dark-mode parity | docs/web/tailwind-theme-audit.md |
Utility-first CSS framework. Style in HTML — no custom CSS required.
# Next.js (includes Tailwind automatically)
npx create-next-app@latest my-app --typescript --tailwind
# Standalone (any project)
npm install -D tailwindcss postcss autoprefixer
npx tailwindcss init -p
tailwind.config.js (minimum):
/** @type {import('tailwindcss').Config} */
module.exports = {
content: ['./src/**/*.{html,js,jsx,ts,tsx}'],
theme: { extend: {} },
plugins: [],
};
input.css:
@tailwind base;
@tailwind components;
@tailwind utilities;
CDN (prototyping only):
<script src="https://cdn.tailwindcss.com"></script>
Tailwind replaces custom CSS with composable utility classes directly on elements.
<!-- Traditional CSS approach -->
<div class="mainBlock">…</div>
<!-- Tailwind utility-first approach -->
<div class="bg-gray-500 p-2 w-72 rounded border border-gray-900 flex">…</div>
Utility classes vs inline styles:
Mobile-first breakpoints. Apply a prefix to target that breakpoint and above.
| Prefix | Min-width | Equivalent CSS |
|---|---|---|
| (none) | 0px | Always applies |
sm: | 640px | @media (min-width: 640px) |
md: | 768px | @media (min-width: 768px) |
lg: | 1024px | @media (min-width: 1024px) |
xl: | 1280px | @media (min-width: 1280px) |
2xl: | 1536px | @media (min-width: 1536px) |
<!-- Pink on mobile, red sm+, green md+, gray lg+, blue xl+ -->
<div class="bg-pink-500 sm:bg-red-500 md:bg-green-500 lg:bg-gray-500 xl:bg-blue-500">
Target a range (apply only between breakpoints):
<div class="sm:max-lg:bg-red-500"> <!-- only sm to lg -->
<div class="sm:max-md:flex"> <!-- flex only at sm width -->
Format: {modifier}:{utility-class}
<!-- hover, active, focus -->
<button class="bg-green-300 hover:bg-blue-400 active:bg-red-500">Click</button>
<!-- Multiple on same event -->
<button class="hover:bg-green-500 hover:text-white">Hover me</button>
<!-- focus -->
<input class="focus:outline-none focus:ring-2 focus:ring-blue-500" />
<!-- disabled -->
<input disabled class="disabled:bg-gray-200 disabled:cursor-not-allowed" />
<!-- required / invalid -->
<input required class="required:bg-red-50 invalid:border-red-500" />
<!-- first-child / last-child -->
<div class="first:font-bold last:italic">…</div>
<!-- odd / even children -->
<div class="odd:bg-green-100 even:bg-blue-100">…</div>
<!-- group — parent hover affects children -->
<div class="group">
<p class="text-gray-600 group-hover:text-black">Text changes on parent hover</p>
</div>
System-controlled (default):
<div class="bg-white dark:bg-gray-900 text-black dark:text-white">
Manual toggle (class-based):
// tailwind.config.js
module.exports = { darkMode: 'class', ... }
<!-- Add/remove 'dark' class on root element via JS -->
<html id="root" class="dark">
<div class="bg-white dark:bg-gray-900">…</div>
</html>
// Toggle dark mode
document.getElementById('root').classList.toggle('dark');
When repeating the same set of utility classes across many elements, extract to a component class.
/* input.css */
@tailwind base;
@tailwind components;
@tailwind utilities;
@layer components {
.btn-primary {
@apply px-4 py-2 bg-blue-600 text-white rounded hover:bg-blue-700 transition;
}
.card {
@apply bg-white rounded-xl shadow-md p-6;
}
}
@layer base {
h1 { @apply text-2xl font-bold; }
h2 { @apply text-xl font-semibold; }
a { @apply text-blue-600 underline; }
}
<button class="btn-primary">Save</button>
<div class="card">…</div>
Rule: Use @apply sparingly — prefer utility classes in JSX components.
Use it for global base styles (headings, links) and frequently repeated component patterns.
module.exports = {
theme: {
extend: {
colors: {
'brand': '#1DA1F2',
'brand-dark': '#0c85d0',
'silver': '#C0C0C0',
},
},
},
};
Usage: bg-brand, text-silver
Color with shades:
colors: {
'primary': {
50: '#eff6ff',
100: '#dbeafe',
500: '#3b82f6',
900: '#1e3a5f',
},
}
Usage: bg-primary-500, text-primary-900
Arbitrary color (no config needed): bg-[#1DA1F2]
theme: {
screens: {
'sm': '640px', 'md': '768px', 'lg': '1024px',
'xl': '1280px', '2xl': '1536px',
'3xl': '1800px', // custom extra-large
'mobile': '480px', // custom named breakpoint
},
},
theme: {
extend: {
spacing: {
'18': '4.5rem',
'72': '18rem',
'84': '21rem',
},
},
},
module.exports = { corePlugins: { container: false, preflight: false } }
Add classes that may not appear in scanned files (e.g., dynamically constructed):
module.exports = { safelist: ['bg-red-500', 'text-3xl', 'lg:text-4xl'] }
npm install @tailwindcss/typography @tailwindcss/forms
plugins: [
require('@tailwindcss/typography'), // .prose classes for rich text
require('@tailwindcss/forms'), // styled form controls
],
Usage: <article class="prose lg:prose-xl">, <input class="form-input" />
<!-- Container (centers content at breakpoint) -->
<div class="container mx-auto px-4">
<!-- Flexbox -->
<div class="flex items-center justify-between gap-4">
<div class="flex flex-col gap-2">
<div class="flex flex-wrap">
<!-- Grid -->
<div class="grid grid-cols-3 gap-6">
<div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4">
<div class="col-span-2"> <!-- span 2 columns -->
<div class="grid grid-cols-[repeat(auto-fit,minmax(min(18rem,100%),1fr))] gap-[clamp(1rem,2vw,2rem)]">
<!-- Position -->
<div class="relative">
<div class="absolute top-0 right-0">badge</div>
</div>
<!-- Overflow -->
<div class="overflow-hidden">
<div class="overflow-x-auto">
<!-- Font size: text-xs text-sm text-base text-lg text-xl text-2xl … text-9xl -->
<h1 class="text-4xl font-bold tracking-tight">
<p class="text-base text-gray-600 leading-relaxed">
<!-- Font weight -->
<!-- font-thin font-light font-normal font-medium font-semibold font-bold font-extrabold -->
<!-- Text color: text-{color}-{shade} -->
<p class="text-gray-900 dark:text-gray-100">
<!-- Text align -->
<p class="text-center"> <p class="text-right">
<!-- Truncate long text -->
<p class="truncate"> <!-- single line -->
<p class="line-clamp-3"> <!-- 3 lines then … -->
<h1 class="text-[clamp(2.25rem,6vw,5rem)] leading-[1.05]"> <!-- fluid bounded heading -->
<!-- Padding/Margin: p-{n} px-{n} py-{n} pt/pr/pb/pl-{n} -->
<!-- n = 0,1,2,3,4,5,6,8,10,12,16,20,24,32,40,48,64 (0.25rem each) -->
<div class="p-4 mx-auto mt-8">
<!-- Width/Height -->
<div class="w-full max-w-2xl h-screen min-h-0">
<img class="w-16 h-16 object-cover rounded-full">
<!-- Borders -->
<div class="border border-gray-200 rounded-lg">
<div class="border-2 border-blue-500 rounded-xl ring-2 ring-blue-300">
<!-- Shadow -->
<div class="shadow shadow-lg shadow-xl shadow-2xl">
<!-- Opacity -->
<div class="opacity-50 hover:opacity-100 transition">
<!-- Transitions -->
<button class="transition duration-200 ease-in-out hover:scale-105">
<!-- Button variants -->
<button class="px-4 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700
active:bg-blue-800 transition disabled:opacity-50 disabled:cursor-not-allowed">
Primary
</button>
<!-- Card -->
<div class="bg-white dark:bg-gray-800 rounded-2xl shadow-md p-6 hover:shadow-lg transition">
<!-- Badge -->
<span class="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs
font-medium bg-green-100 text-green-800">
Active
</span>
<!-- Input -->
<input class="w-full px-3 py-2 border border-gray-300 rounded-lg
focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent
dark:bg-gray-700 dark:border-gray-600 dark:text-white" />
<!-- Responsive nav (mobile stack → desktop row) -->
<nav class="flex flex-col md:flex-row gap-2 md:gap-6">
| Rule | Reason |
|---|---|
Never include CSS files in content config | Causes false class detection |
Use complete class names (bg-red-500 not bg-${color}-500) | Dynamic strings aren't scanned |
Prefer @layer components over inline @apply in JSX | Keeps HTML clean for one-off reuse |
Use extend not override in theme | Preserve default utilities |
| Use framework components (React, Vue) instead of HTML loops | Class strings in components = clean repetition |
| Check Tailwind v3 docs for new classes | Classes added/renamed across versions |
| Use arbitrary values for mathematical relationships, not random decoration | clamp(), minmax(), calc(), aspect-ratio, and ch preserve proportion and responsiveness |
Source: Bhat — Ultimate Tailwind CSS Handbook (BPB, 2023)
| Condition | Choice | Failure avoided |
|---|---|---|
| Value is a reusable product token | Add a named theme token | Scattered arbitrary values |
| Value is a one-off mathematical constraint | Use an arbitrary value | Polluting the theme |
| Utility sequence repeats with stable semantics | Extract a component | Copy-paste drift |
bg-${color}-500. Fix: map to complete class strings.@apply for every component. Fix: extract only stable repetition.Read and search markup, configuration, and tokens first. Edit only when authorised; execute the existing build, lint, responsive checks, and accessibility checks when available.
If the build or rendered interface is unavailable, provide exact changes and mark purge, contrast, responsive, and interaction-state checks as unverified.
| Artefact | Required? | Purpose |
|---|---|---|
| Design tokens, responsive layouts, component states, and Tailwind version | yes | Map design to maintainable utilities |
Top-level router for the Chwezi Core Systems web-development and software-engineering skills engine. Use for AI systems, SaaS, architecture, APIs, databases, security, frontend engineering, mobile, DevOps, reliability, product engineering, SDLC documentation, catalog maintenance, delivery evidence packs, routing fixtures, and world-class engineering quality gates.
Use when specifying or implementing engine-neutral gameplay systems such as movement, combat, AI, quests, dialogue, inventory, progression, save/load, world state, spawning, cameras, or narrative state; engine skills own framework integration.
Use when building, restructuring, profiling, testing, or packaging a Unity mobile game in C# for Android or iOS; covers project architecture, scenes, prefabs, data, input, assets, saves, builds, and Unity-specific release evidence.
Use when discovering, designing, prioritizing, or auditing AI-powered products for measurable business value. Applies to AI opportunity mapping, ROI cases, product strategy, client workshops, and deciding whether an AI feature should be built.
Use when specifying one AI-powered feature end to end, including model choice, prompt and context contracts, output schema, fallbacks, human oversight, UX states, and evaluation.
Use when discovering and ranking AI use cases for a project or module and producing an opportunity register with impact, effort, cost, risk, and evidence gaps.