:root {
  /* Brand Colors — Blue Theme */
  --color-primary: #0B1D2E;
  --color-primary-light: #142D45;
  --color-primary-mid: #1E3A5F;
  --color-accent: #3B82F6;
  --color-accent-light: #60A5FA;
  --color-accent-dark: #1D4ED8;
  --color-secondary: #2563EB;
  --color-secondary-light: #93C5FD;
  --color-surface: #F0F4F8;
  --color-surface-dark: #E2E8F0;
  --color-text: #1A1A1A;
  --color-text-light: #F5F5F5;
  --color-text-muted: #64748B;
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-success: #16A34A;
  --color-error: #DC2626;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, rgba(11, 29, 46, 0.88) 0%, rgba(30, 58, 95, 0.7) 50%, rgba(11, 29, 46, 0.85) 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-accent-dark) 0%, var(--color-accent) 50%, var(--color-accent-light) 100%);
  --gradient-dark: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.04) 100%);

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.5rem;
  --font-size-hero: clamp(2.5rem, 5vw, 4.5rem);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --container-max: 1400px;
  --container-padding: clamp(1rem, 3vw, 2rem);
  --nav-height: 72px;
  --section-padding: clamp(3rem, 6vw, 5rem);

  /* Borders & Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --border-thin: 1px solid rgba(59, 130, 246, 0.2);
  --border-accent: 1px solid var(--color-accent);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(11, 29, 46, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 29, 46, 0.12);
  --shadow-lg: 0 16px 48px rgba(11, 29, 46, 0.18);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.35);
  --shadow-glow-strong: 0 0 50px rgba(59, 130, 246, 0.5);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-nav: 1000;
  --z-modal: 2000;
  --z-lightbox: 3000;
}