:root {
  color-scheme: dark;

  /* Palette */
  --color-bg-primary: #090b11;
  --color-bg-secondary: #111623;
  --color-bg-elevated: #151c2d;
  --color-surface: rgba(26, 33, 53, 0.75);
  --color-border: rgba(138, 168, 255, 0.15);

  --color-accent: #7c8cff;
  --color-accent-strong: #9aa8ff;
  --color-accent-muted: rgba(124, 140, 255, 0.12);
  --color-success: #4ade80;
  --color-warning: #facc15;
  --color-danger: #f87171;

  --color-text-primary: #f5f7ff;
  --color-text-secondary: rgba(245, 247, 255, 0.85);
  --color-text-tertiary: rgba(245, 247, 255, 0.68);

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

  --font-size-xs: clamp(0.75rem, 0.7vw, 0.8rem);
  --font-size-sm: clamp(0.85rem, 0.75vw, 0.95rem);
  --font-size-md: clamp(1rem, 0.9vw, 1.1rem);
  --font-size-lg: clamp(1.25rem, 1.3vw, 1.5rem);
  --font-size-xl: clamp(1.75rem, 2vw, 2.25rem);
  --font-size-xxl: clamp(2.5rem, 3.5vw, 3.5rem);

  /* Layout */
  --layout-max-width: min(1220px, 90vw);
  --layout-gutter: clamp(1.25rem, 2vw, 2.5rem);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-soft: 0 20px 60px rgba(12, 16, 29, 0.35);
  --shadow-strong: 0 45px 80px rgba(12, 16, 29, 0.55);

  /* Animation */
  --transition-fast: 160ms ease;
  --transition-medium: 260ms ease;
  --transition-slow: 420ms ease;

  /* Breakpoints */
  --bp-tablet: 768px;
  --bp-desktop: 1280px;
  --bp-wide: 1920px;
  --bp-ultra: 2560px;
}