/* Tektonomy · branding-compatible tokens (fallbacks + aliases) */

:root {
  color-scheme: light;

  /* Branding canonical — mono-black fallbacks before theme.js runs */
  --bg: #FFFFFF;
  --surface: #FAFAFA;
  --surface-2: #F0F0F0;
  --text: #0A0A0A;
  --text-muted: #545454;
  --border: #D6D6D6;
  --accent: #FFD500;
  --accent-ink: #0A0A0A;

  --f-display: 'EB Garamond', Georgia, serif;
  --f-sans: 'Manrope', system-ui, -apple-system, sans-serif;
  --f-mono: 'Roboto Mono', ui-monospace, Menlo, monospace;
  --r-ui: 0;

  --info-light: #D6E8FF;
  --info: #1F6FEB;
  --info-dark: #0B3D8C;
  --success-light: #D9F0DC;
  --success: #1F8A3B;
  --success-dark: #0E5022;
  --warning-light: #FFE5C2;
  --warning: #ED7A14;
  --warning-dark: #8A4108;
  --danger-light: #FBD4D4;
  --danger: #D62828;
  --danger-dark: #7A1414;

  /* Tektonomy aliases */
  --color-paper: var(--bg);
  --color-surface: var(--surface);
  --color-ink: var(--text);
  --color-muted: var(--text-muted);
  --color-rule: var(--border);
  --color-accent: var(--accent);
  --color-accent-ink: var(--accent-ink);
  --font-display: var(--f-display);
  --font-body: var(--f-sans);
  --font-mono: var(--f-mono);
  --radius-sm: var(--r-ui);

  /* Layout tokens (not driven by branding export) */
  --radius-none: 0;
  --radius-xs: 2px;
  --radius-md: 8px;
  --color-rule-dark: color-mix(in srgb, var(--color-paper) 14%, transparent);

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.5rem;
  --fs-3xl: 3.75rem;
  --fs-4xl: 5.5rem;
  --fs-hero: clamp(3.25rem, 16vw, 14rem);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 7rem;
  --space-8: 10rem;

  --max-w: 1320px;
  --gutter: clamp(1rem, 4vw, 3rem);
  --tap-target: 44px;
  --rule: 1px solid var(--color-rule);
  --rule-dark: 1px solid var(--color-rule-dark);
}

:root[data-color-scheme="dark"] {
  color-scheme: dark;
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  min-width: 0;
}

.topbar-actions > * {
  min-width: 0;
}

.theme-toggle {
  appearance: none;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: inherit;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1;
  padding: 0.45rem 0.7rem;
  text-transform: uppercase;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
  min-height: var(--tap-target);
  white-space: nowrap;
}

.theme-toggle:hover {
  background: var(--color-surface);
  border-color: var(--color-ink);
}

.theme-toggle[aria-pressed="true"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

@media (max-width: 640px) {
  :root {
    --gutter: clamp(0.875rem, 5vw, 1.25rem);
    --fs-hero: clamp(3rem, 15vw, 4rem);
  }

  .topbar-actions {
    gap: 0.75rem;
  }

  .theme-toggle {
    padding: 0.4rem 0.55rem;
    min-height: 2.5rem;
  }
}

@media (max-width: 420px) {
  :root {
    --gutter: 0.875rem;
  }

  .theme-toggle {
    letter-spacing: 0.08em;
  }
}

/* Pact uses a slightly narrower measure */
.pact-page {
  --max-w: 1280px;
}