plugins/tailwindcss/skills/tailwindcss-custom-styles/SKILL.md
Custom CSS authoring in Tailwind CSS v4.1 via @utility, @variant, @custom-variant, @apply, and @layer directives. Use when: creating a new named utility class, writing conditional/dark-mode variants, defining a custom variant selector, or applying utility classes inside custom CSS rules.
npx skillsauth add fusengine/agents tailwindcss-custom-stylesInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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@utility glass-effect {
backdrop-filter: blur(10px);
background: rgba(255, 255, 255, 0.1);
}
/* Usage: class="glass-effect hover:glass-effect" */
.card {
background: white;
@variant dark { background: #1a1a2e; }
@variant hover { transform: scale(1.05); }
}
@custom-variant theme-midnight (&:where([data-theme="midnight"] *));
/* Usage: theme-midnight:bg-black */
.btn-primary {
@apply bg-blue-500 text-white px-4 py-2 rounded-lg;
}
@layer components {
.card { @apply bg-white shadow-md rounded-xl p-4; }
}
testing
Copy self-audit and ban-lists — filler verbs/hype adjectives, slop placeholder names, fake-precise numbers, Title Case headlines, humor in error copy ('Oops!'), em-dash crutch, one copy register per page.
development
Logged-in web apps — dashboards, auth flows, settings, onboarding, data tables, command palettes, modals, toasts. Register `product`: density and glance-speed over marketing polish, no hero/CTA-tricks, every data surface covers empty/loading/error explicitly, tables and dataviz follow preattentive-processing rules.
development
Marketing sites, landing pages, campaign pages — register `brand` (design IS the product). Structure comes from the register's POV + a macrostructure pick, never from copying an inspiration site's section flow. Hero discipline, deviated section order, asymmetric grids, and a silhouette lookalike-test gate before ship.
development
Token-strategy core — OKLCH color rules, neutral tinting, accent-commitment levels, type scale, 8pt spacing grid, touch targets, and the canonical output format of design-system.md (the file the harness gates on). This is routing step 1 of design-method/SKILL.md — read it before design-web/design-webapp/design-ios/design-android, before picking or auditing a single color/type/spacing value.