:root {
  /* Backgrounds */
  --bg-primary:    #050d1f;
  --bg-secondary:  #0a1628;
  --bg-surface:    #0f1e3a;
  --bg-elevated:   #152240;
  --bg-glass:      rgba(15, 30, 58, 0.75);

  /* Borders */
  --border:        #1e3a5f;
  --border-subtle: #112033;

  /* Brand */
  --primary:        #2563eb;
  --primary-light:  #3b82f6;
  --primary-glow:   rgba(37, 99, 235, 0.3);
  --accent:         #10b981;
  --accent-light:   #34d399;
  --accent-glow:    rgba(16, 185, 129, 0.3);
  --warm:           #f59e0b;

  /* Text */
  --text-primary:   #f0f6ff;
  --text-secondary: #94a3b8;
  --text-muted:     #475569;

  /* Gradients */
  --gradient-hero:    linear-gradient(135deg, #050d1f 0%, #0a1e3d 50%, #051628 100%);
  --gradient-primary: linear-gradient(135deg, #1d4ed8, #3b82f6);
  --gradient-accent:  linear-gradient(135deg, #059669, #10b981);
  --gradient-card:    linear-gradient(135deg, rgba(21,34,64,0.8), rgba(15,30,58,0.9));
  --gradient-warm:    linear-gradient(135deg, #d97706, #f59e0b);

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2rem;
  --space-xl:  3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --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;

  /* Radius */
  --radius-sm:   0.375rem;
  --radius:      0.5rem;
  --radius-md:   0.75rem;
  --radius-lg:   1rem;
  --radius-xl:   1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.3);
  --shadow:         0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:      0 8px 32px rgba(0,0,0,0.5);
  --shadow-primary: 0 8px 32px rgba(37,99,235,0.3);
  --shadow-accent:  0 8px 32px rgba(16,185,129,0.3);

  /* Transitions */
  --transition:      200ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --max-width:         1200px;
  --container-padding: 1.5rem;
  --nav-height:        72px;
}