:root {
  /* Primary — Deep Ink: near-black with blue undertone */
  --color-primary: #111827;
  --color-primary-rgb: 17, 24, 39;
  --color-primary-light: #1e293b;

  /* Accent — Deep Sapphire: interactive elements only */
  --color-accent: #1d4ed8;
  --color-accent-rgb: 29, 78, 216;
  --color-accent-hover: #1e40af;

  /* Secondary — Aged Bronze: NASDAQ badge + cert marks only */
  --color-secondary: #a78347;
  --color-secondary-rgb: 167, 131, 71;

  /* Neutrals — warm-shifted grays */
  --color-neutral-800: #1f2937;
  --color-neutral-700: #374151;
  --color-neutral-600: #4b5563;
  --color-neutral-500: #6b7280;
  --color-neutral-400: #9ca3af;
  --color-neutral-300: #d1d5db;
  --color-neutral-200: #e5e7eb;
  --color-neutral-100: #f3f4f6;

  /* Backgrounds — warm ivory, not cold white */
  --color-bg: #f8f7f4;
  --color-bg-alt: #f0eeea;
  --color-surface: #ffffff;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Typography */
  --font-display: 'DM Serif Display', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --text-xs: 0.8125rem;
  --text-sm: 0.875rem;
  --text-base: 1.0625rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.75rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.7;

  --tracking-tight: -0.01em;
  --tracking-normal: 0;
  --tracking-wide: 0.08em;

  /* Shadows — subtle, no glow */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Motion */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
  --ease-out: cubic-bezier(0.0, 0.0, 0.2, 1);

  /* Layout */
  --container: 1280px;
  --container-narrow: 720px;
  --nav-height: 80px;
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }
}