Skill: Design Tokens — Vue 3 + shadcn-vue

Default structure (globals.css generated by shadcn-vue init)

@layer base {
  :root {
    --background: 0 0% 100%;
    --foreground: 222.2 84% 4.9%;
    --card: 0 0% 100%;
    --card-foreground: 222.2 84% 4.9%;
    --popover: 0 0% 100%;
    --popover-foreground: 222.2 84% 4.9%;
    --primary: 222.2 47.4% 11.2%;
    --primary-foreground: 210 40% 98%;
    --secondary: 210 40% 96.1%;
    --secondary-foreground: 222.2 47.4% 11.2%;
    --muted: 210 40% 96.1%;
    --muted-foreground: 215.4 16.3% 46.9%;
    --accent: 210 40% 96.1%;
    --accent-foreground: 222.2 47.4% 11.2%;
    --destructive: 0 84.2% 60.2%;
    --destructive-foreground: 210 40% 98%;
    --border: 214.3 31.8% 91.4%;
    --input: 214.3 31.8% 91.4%;
    --ring: 222.2 84% 4.9%;
    --radius: 0.5rem;
  }
  .dark {
    --background: 222.2 84% 4.9%;
    --foreground: 210 40% 98%;
    /* ... dark variants */
  }
}

Additional semantic tokens (add when needed)

:root {
  --success: 142 76% 36%;
  --success-foreground: 0 0% 100%;
  --warning: 38 92% 50%;
  --warning-foreground: 26 83% 14%;
  --info: 199 89% 48%;
  --info-foreground: 0 0% 100%;
}

tailwind.config.ts — extend with custom tokens

import type { Config } from 'tailwindcss'

export default {
  darkMode: 'class', // shadcn-vue uses class strategy
  content: ['./src/**/*.{vue,ts}', './components/**/*.{vue,ts}'],
  theme: {
    extend: {
      colors: {
        // shadcn-vue tokens — do not duplicate, use via CSS vars
        // Additional project tokens:
        success: 'hsl(var(--success))',
        'success-foreground': 'hsl(var(--success-foreground))',
        warning: 'hsl(var(--warning))',
        'warning-foreground': 'hsl(var(--warning-foreground))',
      },
      borderRadius: {
        // shadcn-vue uses --radius
        lg: 'var(--radius)',
        md: 'calc(var(--radius) - 2px)',
        sm: 'calc(var(--radius) - 4px)',
      },
    },
  },
} satisfies Config

Usage in Vue components

<!-- Via Tailwind (preferred) -->
<div class="bg-background text-foreground border border-border rounded-lg" />
<Button class="bg-primary text-primary-foreground" />
<p class="text-muted-foreground text-sm" />

<!-- Via CSS variable (when Tailwind has no utility) -->
<div :style="{ color: 'hsl(var(--muted-foreground))' }" />

<!-- Local scope (override token in a component) -->
<div :style="{ '--primary': '262 83% 58%' }">
  <Button>Button with custom primary</Button>
</div>

Spacing scale (base 4px — maintain consistency)

Token	px	Tailwind	Typical usage
space-0.5	2	gap-0.5	Micro adjustments
space-1	4	gap-1	Icon + label
space-2	8	gap-2	Internal gap
space-3	12	gap-3	Badge padding
space-4	16	gap-4 p-4	Default padding
space-6	24	gap-6	Gap between card sections
space-8	32	gap-8 p-8	Card padding
space-12	48	gap-12	Gap between sections

Consistency checklist

• No hardcoded hex values outside of tokens (#2563EB → hsl(var(--primary)))
• Spacing follows 4px scale
• Dark mode tested with class="dark" on html root
• Semantic tokens used correctly (success, warning, destructive)
• --radius consistent across all components