:root {
  /* Palette */
  --color-sky: #56CCF2;
  --color-ocean: #2F80ED;
  --color-navy: #1A2947;
  --color-mango: #F2994A;
  --color-tangerine: #F97316;

  /* Semantic */
  --color-bg: #F8FBFF;
  --color-surface: #FFFFFF;
  --color-text: #1A2947;
  --color-muted: #5C6E8A;
  --color-border: #D4E4F7;
  --color-code-bg: #EDF4FF;
  --color-code-border: #C8DCF5;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #1A2947 0%, #2F80ED 60%, #56CCF2 100%);
  --gradient-accent: linear-gradient(90deg, #F97316, #F2994A);
  --gradient-section-1: linear-gradient(135deg, #2F80ED, #56CCF2);
  --gradient-section-2: linear-gradient(135deg, #F97316, #F2994A);
  --gradient-section-3: linear-gradient(135deg, #1A2947, #2F80ED);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26,41,71,.08), 0 1px 2px rgba(26,41,71,.06);
  --shadow-md: 0 4px 12px rgba(26,41,71,.12), 0 2px 6px rgba(26,41,71,.08);
  --shadow-lg: 0 12px 32px rgba(26,41,71,.16), 0 4px 12px rgba(26,41,71,.10);

  /* 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;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Source Code Pro', Consolas, monospace;

  --text-xs: clamp(0.7rem, 0.68rem + 0.1vw, 0.75rem);
  --text-sm: clamp(0.8rem, 0.78rem + 0.1vw, 0.875rem);
  --text-base: clamp(0.95rem, 0.9rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.1rem, 1rem + 0.4vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 0.9vw, 2rem);
  --text-3xl: clamp(1.9rem, 1.5rem + 1.5vw, 2.75rem);
  --text-4xl: clamp(2.25rem, 1.8rem + 2vw, 3.5rem);

  /* Layout */
  --header-height: 64px;
  --max-width: 1440px;
  --content-width: 860px;
  --sidebar-width: 260px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}