:root {
  /* Layer 1 — primitive tokens */
  --color-ink-950: #14201b;
  --color-ink-800: #263a31;
  --color-ink-650: #45594f;
  --color-ink-500: #687970;
  --color-paper-50: #fbfaf4;
  --color-paper-100: #f3f0e5;
  --color-paper-200: #e6e0cf;
  --color-fern-900: #073e2c;
  --color-fern-800: #0b5239;
  --color-fern-700: #12694a;
  --color-fern-500: #3b9569;
  --color-moss-300: #a7c97e;
  --color-moss-200: #cfe3a8;
  --color-gold-700: #9b671c;
  --color-gold-500: #d99a35;
  --color-gold-200: #f3d18b;
  --color-clay-700: #963f2d;
  --color-clay-500: #ca6a4e;
  --color-clay-100: #f7e0d5;
  --color-blue-700: #245a70;
  --color-blue-100: #dbeaf0;
  --color-white: #ffffff;
  --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;
  --radius-sm: 0.4rem;
  --radius-md: 0.8rem;
  --radius-lg: 1.35rem;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgb(20 32 27 / 8%);
  --shadow-md: 0 14px 42px rgb(20 32 27 / 12%);
  --font-display: "Arial Narrow", "Aptos Display", "Helvetica Neue", Arial, sans-serif;
  --font-body: Inter, Aptos, "Helvetica Neue", Arial, sans-serif;
  --text-xs: clamp(0.68rem, 0.62rem + 0.18vw, 0.84rem);
  --text-sm: clamp(0.78rem, 0.7rem + 0.24vw, 0.98rem);
  --text-base: clamp(0.92rem, 0.8rem + 0.38vw, 1.2rem);
  --text-lg: clamp(1.05rem, 0.88rem + 0.58vw, 1.48rem);
  --text-xl: clamp(1.3rem, 1rem + 1vw, 2rem);
  --text-2xl: clamp(1.8rem, 1.3rem + 1.8vw, 3.2rem);
  --text-3xl: clamp(2.5rem, 1.55rem + 3.6vw, 5.6rem);
  --leading-tight: 1.02;
  --leading-title: 1.12;
  --leading-body: 1.45;

  /* Layer 2 — semantic tokens */
  --surface-page: var(--color-paper-50);
  --surface-card: var(--color-white);
  --surface-muted: var(--color-paper-100);
  --surface-dark: var(--color-fern-900);
  --text-primary: var(--color-ink-950);
  --text-secondary: var(--color-ink-650);
  --text-on-dark: var(--color-paper-50);
  --border-subtle: var(--color-paper-200);
  --border-strong: var(--color-ink-800);
  --accent-primary: var(--color-fern-700);
  --accent-secondary: var(--color-moss-300);
  --accent-warm: var(--color-gold-500);
  --accent-risk: var(--color-clay-500);
  --accent-info: var(--color-blue-700);
  --status-effect: var(--color-blue-700);
  --status-mechanism: var(--color-fern-700);
  --status-official: var(--color-gold-700);
  --status-proposition: var(--color-clay-700);
  --focus-ring: var(--color-gold-500);

  /* Layer 3 — component tokens */
  --slide-pad-x: clamp(1.25rem, 4vw, 5.5rem);
  --slide-pad-y: clamp(1.1rem, 3.5vh, 3.25rem);
  --card-bg: var(--surface-card);
  --card-border: 1px solid var(--border-subtle);
  --card-radius: var(--radius-lg);
  --card-shadow: var(--shadow-sm);
  --chip-bg: var(--surface-muted);
  --chip-border: 1px solid var(--border-subtle);
  --nav-size: 2.75rem;
  --progress-height: 0.26rem;
}

@media (max-width: 720px) {
  :root {
    --slide-pad-x: 1rem;
    --slide-pad-y: 1rem;
    --nav-size: 2.45rem;
  }
}