:root {
  /* Background */
  --bg-primary: #0b0f1a;
  --bg-secondary: #101520;
  --bg-tertiary: #1a1f2e;
  --bg-card: #12161f;
  --bg-card-hover: #181d2a;

  /* Accent — custom palette */
  --accent-primary: #38bdf8;
  --accent-primary-hover: #0ea5e9;
  --accent-primary-glow: rgba(56, 189, 248, 0.15);
  --accent-secondary: #34d399;
  --accent-secondary-hover: #10b981;
  --accent-secondary-glow: rgba(52, 211, 153, 0.12);
  --accent-warm: #fbbf24;
  --accent-warm-hover: #f59e0b;
  --accent-danger: #f87171;
  --accent-purple: #a78bfa;

  /* Text */
  --text-primary: #f0f2f5;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Borders */
  --border-color: #1e2536;
  --border-color-hover: #2d3548;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.45);
  --shadow-glow-blue: 0 0 24px rgba(56, 189, 248, 0.08), 0 0 48px rgba(56, 189, 248, 0.04);
  --shadow-glow-green: 0 0 24px rgba(52, 211, 153, 0.08), 0 0 48px rgba(52, 211, 153, 0.04);

  /* Typography */
  --font-body: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.775rem);
  --text-sm: clamp(0.8125rem, 0.775rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.25vw, 1rem);
  --text-lg: clamp(1.0625rem, 1rem + 0.35vw, 1.125rem);
  --text-xl: clamp(1.1875rem, 1.1rem + 0.5vw, 1.25rem);
  --text-2xl: clamp(1.4rem, 1.2rem + 1vw, 1.5rem);
  --text-3xl: clamp(1.75rem, 1.4rem + 1.5vw, 1.875rem);
  --text-4xl: clamp(2rem, 1.5rem + 2.5vw, 2.5rem);
  --text-5xl: clamp(2.75rem, 2rem + 3.5vw, 3.5rem);

  /* 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;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 72rem;
  --container-narrow: 56rem;
  --container-padding: clamp(1.25rem, 4vw, 2.5rem);
  --nav-height: 4rem;

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}