/* Design tokens — the only place hex values may appear (DESIGN_SYSTEM.md 2.3) */
:root {
  /* Color: brand */
  --color-ink-900: #0B1220;
  --color-ink-800: #131C2E;
  --color-ink-700: #1F2A40;
  --color-slate-600: #475569;
  --color-slate-400: #94A3B8;
  --color-slate-200: #E2E8F0;
  --color-slate-100: #F1F5F9;
  --color-white: #FFFFFF;
  --color-primary-600: #2F5BFF;
  --color-primary-700: #1E44E0;
  --color-primary-100: #E6ECFF;
  --color-signal-400: #22D3A6;

  /* Color: pillar accents (decorative only, used in "One system. Three jobs.") */
  --color-signal-600: #0E9F7E;
  --color-signal-100: #DCFAF1;
  --color-amber-600: #D97706;
  --color-amber-400: #FBBF24;
  --color-amber-100: #FEF3C7;

  /* Color: extra demo accents (decorative only, used in the software showcase) */
  --color-violet-600: #7C3AED;
  --color-violet-100: #EDE9FE;
  --color-rose-600: #E11D48;
  --color-rose-100: #FFE4E6;

  /* Color: semantic */
  --color-success: #16A34A;
  --color-warning: #D97706;
  --color-error: #DC2626;
  --color-info: var(--color-primary-600);

  /* Color: derived (transparent versions of tokens) */
  --color-primary-600-a40: rgb(47 91 255 / 0.4);
  --color-white-a92: rgb(255 255 255 / 0.92);

  /* Gradient (one allowed, max once per page) */
  --gradient-brand: linear-gradient(135deg, var(--color-primary-600), var(--color-signal-400));

  /* Typography: families */
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Typography: fluid scale, mobile → desktop between 320px and 1280px */
  --text-display: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  --text-h1: clamp(2.125rem, 1.833rem + 1.458vw, 3rem);
  --text-h2: clamp(1.75rem, 1.583rem + 0.833vw, 2.25rem);
  --text-h3: clamp(1.375rem, 1.333rem + 0.208vw, 1.5rem);
  --text-h4: clamp(1.125rem, 1.083rem + 0.208vw, 1.25rem);
  --text-body-lg: clamp(1.125rem, 1.083rem + 0.208vw, 1.25rem);
  --text-body: 1rem;
  --text-body-sm: 0.875rem;
  --text-eyebrow: clamp(0.75rem, 0.729rem + 0.104vw, 0.8125rem);

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* Layout */
  --container: 1200px;
  --container-narrow: 760px;
  --container-wide: 1400px;
  --gutter: 24px;
  --grid-gap: 24px;
  --header-height: 64px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Elevation (tinted with ink-900) */
  --shadow-1: 0 2px 8px rgb(11 18 32 / 0.06);
  --shadow-2: 0 8px 24px rgb(11 18 32 / 0.08);
  --shadow-3: 0 24px 48px rgb(11 18 32 / 0.14);

  /* Motion */
  --motion-fast: 150ms;
  --motion-base: 250ms;
  --motion-slow: 400ms;
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-in: ease-in;
}

@media (min-width: 768px) {
  :root { --gutter: 32px; }
}

@media (min-width: 1024px) {
  :root { --header-height: 72px; }
}

@media (min-width: 1280px) {
  :root {
    --gutter: 48px;
    --grid-gap: 32px;
  }
}