:root {
  /* ═══ COLORS ═══ */
  --bg-primary: #0a0a0f;
  --bg-secondary: #0e0e16;
  --bg-tertiary: #12121a;
  --bg-card: rgba(18, 18, 30, 0.7);
  --bg-nav: rgba(10, 10, 15, 0.85);

  --purple-400: #a78bfa;
  --purple-500: #8b5cf6;
  --purple-600: #7c3aed;
  --purple-700: #6d28d9;
  --purple-900: #4c1d95;

  --cyan-500: #06b6d4;

  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --border-subtle: rgba(139, 92, 246, 0.08);
  --border-light: rgba(139, 92, 246, 0.15);
  --border-medium: rgba(139, 92, 246, 0.3);

  /* ═══ TYPOGRAPHY ═══ */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* ═══ SPACING ═══ */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* ═══ BORDERS ═══ */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* ═══ TRANSITIONS ═══ */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;

  /* ═══ EFFECTS ═══ */
  --glow-sm: 0 0 10px rgba(139, 92, 246, 0.2);
  --glow-md: 0 0 20px rgba(139, 92, 246, 0.3);
  --glow-lg: 0 0 40px rgba(139, 92, 246, 0.3), 0 0 80px rgba(139, 92, 246, 0.1);
  --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.4);

  /* ═══ LAYOUT ═══ */
  --container-max: 1140px;
  --container-padding: 1.5rem;
  --nav-height: 72px;
  --section-padding: 7rem;
}

@media (max-width: 768px) {
  :root {
    --text-5xl: 2.25rem;
    --text-6xl: 2.75rem;
    --text-7xl: 3rem;
    --section-padding: 4rem;
    --container-padding: 1.25rem;
    --nav-height: 64px;
  }
}