:root {
  color-scheme: light;
  --space-3xs: 2px; --space-2xs: 4px; --space-xs: 8px; --space-sm: 12px; --space-md: 16px; --space-lg: 24px; --space-xl: 40px; --space-2xl: 64px; --space-3xl: 96px; --space-4xl: 144px;
  --text-xs: 0.8125rem; --text-sm: 0.875rem; --text-md: 1rem; --text-lg: 1.25rem; --text-xl: 1.5625rem; --text-2xl: 1.953rem; --text-3xl: 2.441rem;
  --text-display-s: clamp(2.25rem, 4vw + 0.5rem, 3.75rem); --text-display: clamp(2.75rem, 5vw + 1rem, 5.25rem);
  --text-section: clamp(2rem, 2.5vw + 1rem, 3.5rem); --text-title: clamp(1.25rem, 0.75vw + 0.875rem, 1.625rem); --text-lead: clamp(1.125rem, 0.35vw + 1rem, 1.375rem);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1); --ease-in: cubic-bezier(0.7, 0, 0.84, 0); --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-micro: 120ms; --dur-short: 220ms; --dur-long: 420ms;
  --color-error: oklch(52% 0.19 27); --color-success: oklch(50% 0.12 150);
  --container: 1440px; --gutter: 64px; --gap-columns: 32px; --section-gap-s: 120px; --section-gap: 144px; --section-gap-l: 176px;
  --z-base: 1; --z-raised: 10; --z-dropdown: 100; --z-sticky: 200; --z-sticky-nav: 300; --z-modal: 400; --z-toast: 500; --z-tooltip: 600;
  --color-paper: oklch(97.2% 0.006 262); --color-paper-2: oklch(94.4% 0.01 262); --color-paper-3: oklch(91.6% 0.013 262);
  --color-ink: oklch(22.5% 0.026 262); --color-ink-2: oklch(38% 0.032 262); --color-muted: oklch(49.5% 0.04 264);
  --color-rule: oklch(88.5% 0.015 262);
  --color-accent: oklch(50.1% 0.192 265); --color-accent-ink: oklch(98.4% 0.006 265); --color-focus: oklch(52% 0.2 265);
  --syn-comment: oklch(55% 0.03 262); --syn-key: oklch(50.1% 0.192 265); --syn-str: oklch(51.8% 0.097 173); --syn-num: oklch(58% 0.14 70); --syn-fn: oklch(50% 0.17 305); --syn-err: oklch(52% 0.19 27);
  --font-display: "Bricolage Grotesque", "Be Vietnam Pro", ui-sans-serif, system-ui, sans-serif; --font-body: "Be Vietnam Pro", ui-sans-serif, system-ui, sans-serif; --font-outlier: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --radius-card: 4px; --radius-pill: 999px; --rule-hair: 1px; --shadow-card: none;
  --tracking-display: -0.02em;
}

/* Dark: re-derived, never inverted. The mode switch sets data-theme; with none set, the system preference decides. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-paper: oklch(18.1% 0.016 262); --color-paper-2: oklch(21.4% 0.018 262); --color-paper-3: oklch(24.6% 0.02 262);
    --color-ink: oklch(93% 0.01 262); --color-ink-2: oklch(83% 0.016 262); --color-muted: oklch(71.5% 0.03 262);
    --color-rule: oklch(31.5% 0.026 262);
    --color-accent: oklch(74% 0.13 265); --color-accent-ink: oklch(18% 0.02 265); --color-focus: oklch(77% 0.14 265);
    --syn-comment: oklch(66% 0.03 262); --syn-key: oklch(74% 0.13 265); --syn-str: oklch(77% 0.11 173); --syn-num: oklch(80% 0.12 70); --syn-fn: oklch(78% 0.11 305); --syn-err: oklch(74% 0.14 27);
    --color-error: oklch(72% 0.15 27); --color-success: oklch(76% 0.13 150);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --color-paper: oklch(18.1% 0.016 262); --color-paper-2: oklch(21.4% 0.018 262); --color-paper-3: oklch(24.6% 0.02 262);
  --color-ink: oklch(93% 0.01 262); --color-ink-2: oklch(83% 0.016 262); --color-muted: oklch(71.5% 0.03 262);
  --color-rule: oklch(31.5% 0.026 262);
  --color-accent: oklch(74% 0.13 265); --color-accent-ink: oklch(18% 0.02 265); --color-focus: oklch(77% 0.14 265);
  --syn-comment: oklch(66% 0.03 262); --syn-key: oklch(74% 0.13 265); --syn-str: oklch(77% 0.11 173); --syn-num: oklch(80% 0.12 70); --syn-fn: oklch(78% 0.11 305); --syn-err: oklch(74% 0.14 27);
  --color-error: oklch(72% 0.15 27); --color-success: oklch(76% 0.13 150);
  color-scheme: dark;
}