:root {
  /* Colors — Light */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-success: #16a34a;
  --color-success-hover: #15803d;
  --color-warning: #d97706;
  --color-warning-hover: #b45309;
  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;
  --color-info: #0284c7;
  --color-info-hover: #0369a1;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-inverse: #ffffff;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;

  /* Typography */
  --font-sans: system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, monospace;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;

  /* Borders */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
}

/* Dark mode */
[data-theme='dark'] {
  --color-primary: #3b82f6;
  --color-primary-hover: #60a5fa;
  --color-success: #22c55e;
  --color-success-hover: #4ade80;
  --color-warning: #f59e0b;
  --color-warning-hover: #fbbf24;
  --color-danger: #ef4444;
  --color-danger-hover: #f87171;
  --color-info: #38bdf8;
  --color-info-hover: #7dd3fc;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #0f172a;
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-border: #334155;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
}