:root {
  /* Color */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-surface: #ffffff;
  --color-background: #f8fafc;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-error: #ef4444;
  --color-success: #22c55e;

  /* Hero (dark, particle-network stage) */
  --hero-background: oklch(16% 0.02 258);
  --hero-text: oklch(96% 0.008 258);
  --hero-text-muted: oklch(72% 0.02 258);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Typography */
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 24px rgba(0,0,0,0.1);

  /* Z-index */
  --z-base: 0;
  --z-dropdown: 100;
  --z-modal: 200;
  --z-toast: 300;
}