:root {
  /* Palette — deep dark with electric accents */
  --c-bg: #0a0a0f;
  --c-bg-alt: #111118;
  --c-surface: #16161f;
  --c-surface-hover: #1e1e2a;
  --c-border: #2a2a3a;
  --c-border-subtle: #1e1e2d;
  --c-text: #e8e8ef;
  --c-text-dim: #8888a0;
  --c-text-muted: #555570;
  --c-accent: #6c5ce7;
  --c-accent-bright: #8b7cf7;
  --c-accent-glow: rgba(108, 92, 231, 0.25);
  --c-green: #00d68f;
  --c-green-glow: rgba(0, 214, 143, 0.2);

  /* Typography */
  --ff-body: 'Inter', system-ui, -apple-system, sans-serif;
  --ff-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --fs-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --fs-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --fs-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --fs-md: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
  --fs-lg: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  --fs-xl: clamp(1.75rem, 1.25rem + 2vw, 2.75rem);
  --fs-hero: clamp(2.5rem, 1.5rem + 5vw, 5.5rem);

  /* Spacing */
  --sp-xs: 0.5rem;
  --sp-sm: 0.75rem;
  --sp-md: 1rem;
  --sp-lg: 1.5rem;
  --sp-xl: 2.5rem;
  --sp-2xl: 4rem;
  --sp-section: clamp(5rem, 4rem + 5vw, 10rem);

  /* Motion */
  --dur-fast: 150ms;
  --dur-normal: 300ms;
  --dur-slow: 600ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* Layout */
  --max-w: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}