:root {
  --color-bg-canvas: #F7F4EE;
  --color-bg-surface: #FFFDFC;
  --color-bg-subtle: #F1ECE4;
  --color-bg-muted: #E7E0D6;
  --color-text-primary: #1F2328;
  --color-text-secondary: #4B5563;
  --color-text-tertiary: #6B7280;
  --color-text-inverse: #FFFDFC;
  --color-border-default: #D7D0C4;
  --color-border-strong: #B8B09F;
  --color-border-focus: #1F5EFF;
  --color-brand-primary: #1F5EFF;
  --color-brand-primary-hover: #184ED6;
  --color-brand-primary-active: #143FAE;
  --color-brand-secondary: #8C5E3C;
  --color-state-success: #1F7A52;
  --color-state-success-bg: #EAF6F0;
  --color-state-warning: #9A6700;
  --color-state-warning-bg: #FFF7D6;
  --color-state-error: #B42318;
  --color-state-error-bg: #FEECEB;
  --color-state-info: #1F5EFF;
  --color-state-info-bg: #EAF0FF;
  --color-verification-text: #165D46;
  --color-verification-bg: #E8F5EE;
  --color-verification-border: #A9D5BF;
  --color-scope-text: #7A4B00;
  --color-scope-bg: #FFF4D6;
  --color-scope-border: #E8C77A;
  --color-method-text: #23406E;
  --color-method-bg: #EEF4FC;
  --color-method-border: #B8CCE8;

  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --font-size-12: 0.75rem;
  --font-size-14: 0.875rem;
  --font-size-16: 1rem;
  --font-size-18: 1.125rem;
  --font-size-20: 1.25rem;
  --font-size-24: 1.5rem;
  --font-size-30: 1.875rem;
  --font-size-36: 2.25rem;
  --font-size-48: 3rem;

  --line-height-12: 1rem;
  --line-height-14: 1.25rem;
  --line-height-16: 1.5rem;
  --line-height-18: 1.75rem;
  --line-height-20: 1.75rem;
  --line-height-24: 2rem;
  --line-height-30: 2.375rem;
  --line-height-36: 2.75rem;
  --line-height-48: 3.5rem;

  --letter-spacing-tight: -0.01em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.02em;

  --space-2: 2px;
  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;
  --space-40: 40px;
  --space-48: 48px;
  --space-64: 64px;
  --space-80: 80px;
  --space-96: 96px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  --border-width-default: 1px;
  --border-width-strong: 2px;

  --shadow-none: none;
  --shadow-sm: 0 1px 2px rgba(31,35,40,0.06);
  --shadow-md: 0 4px 12px rgba(31,35,40,0.08);

  --container-max: 1200px;
  --container-reading: 720px;
  --gutter-desktop: 24px;
  --gutter-mobile: 16px;
  --section-padding-y: 64px;

  --header-height-desktop: 72px;
  --header-height-mobile: 64px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg-canvas);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-16);
  line-height: var(--line-height-16);
  font-weight: var(--font-weight-regular);
  text-rendering: optimizeLegibility;
}

a {
  color: var(--color-brand-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-brand-primary-hover);
}

a:active {
  color: var(--color-brand-primary-active);
}

button,
input,
select,
textarea {
  font: inherit;
}

img,
svg {
  max-width: 100%;
  display: block;
}

:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

.container {
  width: min(100% - 32px, var(--container-max));
  margin-inline: auto;
}

.container--reading {
  width: min(100% - 32px, var(--container-reading));
  margin-inline: auto;
}

.page-section {
  padding-block: clamp(40px, 6vw, var(--section-padding-y));
}

.section-stack,
.stack {
  display: grid;
  gap: var(--space-24);
}

.stack--sm {
  gap: var(--space-16);
}

.stack--lg {
  gap: var(--space-32);
}

.site-header {
  min-height: var(--header-height-desktop);
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  min-height: var(--header-height-desktop);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-12);
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: var(--font-weight-bold);
}

.site-brand__title {
  font-size: var(--font-size-18);
  line-height: var(--line-height-18);
}

.site-header__meta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.site-nav__toggle {
  display: none;
  min-height: 44px;
  min-width: 44px;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-12);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: var(--font-size-14);
  line-height: var(--line-height-14);
  font-weight: var(--font-weight-medium);
}

.site-nav__list a[aria-current="page"] {
  background: var(--color-bg-subtle);
}

.hero,
.page-intro,
.cluster-intro,
.profile-header,
.comparison-header {
  padding-block: clamp(32px, 6vw, 64px);
}

.hero__grid,
.page-intro__grid,
.cluster-intro__grid,
.profile-header__grid,
.comparison-header__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: var(--space-24);
  align-items: start;
}

.hero__content,
.page-intro__content,
.cluster-intro__content,
.profile-header__content,
.comparison-header__content {
  display: grid;
  gap: var(--space-20);
}

.kicker,
.section-label,
.text-label {
  font-size: var(--font-size-12);
  line-height: var(--line-height-12);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

h1,
.text-h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, var(--font-size-36));
  line-height: clamp(2.5rem, 4.5vw, var(--line-height-36));
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  max-width: 16ch;
}

.hero h1.hero__title {
  font-size: clamp(2.25rem, 5vw, var(--font-size-48));
  line-height: clamp(2.75rem, 5.5vw, var(--line-height-48));
}

h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, var(--font-size-30));
  line-height: var(--line-height-30);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
}

h3 {
  margin: 0;
  font-size: var(--font-size-24);
  line-height: var(--line-height-24);
  font-weight: var(--font-weight-semibold);
}

h4 {
  margin: 0;
  font-size: var(--font-size-18);
  line-height: var(--line-height-18);
  font-weight: var(--font-weight-semibold);
}

p {
  margin: 0;
  color: var(--color-text-secondary);
}

.lead {
  max-width: 60ch;
  font-size: var(--font-size-18);
  line-height: var(--line-height-18);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-12);
}

.button,
.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 var(--space-16);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: var(--font-size-14);
  line-height: var(--line-height-14);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  cursor: pointer;
}

.button-primary {
  background: var(--color-brand-primary);
  color: var(--color-text-inverse);
}

.button-primary:hover {
  background: var(--color-brand-primary-hover);
  color: var(--color-text-inverse);
}

.button-primary:active {
  background: var(--color-brand-primary-active);
}

.button-secondary {
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border-default);
}

.card,
.surface,
.profile-block,
.compare-card,
.list-card,
.top-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card__body,
.surface__body,
.profile-block__body,
.compare-card__body,
.list-card__body,
.top-card__body {
  padding: var(--space-24);
}

.subtle-block,
.definition-block,
.secondary-section {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
}

.scope-note,
.scope-signal {
  background: var(--color-scope-bg);
  border: 1px solid var(--color-scope-border);
  color: var(--color-scope-text);
  padding: 12px 16px;
  border-radius: var(--radius-md);
}

.scope-note p,
.scope-signal p,
.scope-note li,
.scope-signal li {
  color: var(--color-scope-text);
}

.method-panel,
.method-link-panel {
  background: var(--color-method-bg);
  border: 1px solid var(--color-method-border);
  color: var(--color-method-text);
  border-radius: var(--radius-md);
  padding: var(--space-16);
  display: grid;
  gap: var(--space-8);
}

.method-panel p,
.method-link-panel p {
  color: var(--color-method-text);
  font-size: var(--font-size-14);
  line-height: var(--line-height-14);
}

.verification-badge,
.status-signal,
.updated-signal,
.verification-status,
.update-signal {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  min-height: 28px;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-verification-border);
  background: var(--color-verification-bg);
  color: var(--color-verification-text);
  font-size: var(--font-size-14);
  line-height: var(--line-height-14);
  font-weight: var(--font-weight-medium);
}

.verification-row,
.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
}

.verification-badge--block,
.status-signal--block,
.verification-status--block {
  border-radius: var(--radius-sm);
}

.verification-badge__icon,
.status-icon {
  width: 14px;
  height: 14px;
  border: 1.5px solid currentColor;
  border-radius: 999px;
  flex: 0 0 auto;
}

.notice-warning,
.coverage-limits,
.pilot-status,
.dataset-limitations,
.current-definition-status {
  background: var(--color-state-warning-bg);
  border: 1px solid #E9D08B;
  color: var(--color-state-warning);
  border-radius: var(--radius-md);
  padding: var(--space-16);
}

.notice-warning p,
.coverage-limits p,
.pilot-status p,
.dataset-limitations p,
.current-definition-status p {
  color: var(--color-state-warning);
}

.badges,
.attribute-badges,
.fact-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
}

.badge,
.attribute-badge,
.fact-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-pill);
  color: var(--color-text-secondary);
  font-size: var(--font-size-12);
  line-height: var(--line-height-12);
  font-weight: var(--font-weight-medium);
}

.grid,
.cards-grid,
.profile-links,
.standardized-cafe-cards,
.top-3-list,
.top-3-blocks,
.primary-entries,
.cluster-navigation,
.related-clusters-or-backlink,
.return-paths {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter-desktop);
}

.grid > *,
.cards-grid > *,
.profile-links > *,
.standardized-cafe-cards > *,
.top-3-list > *,
.top-3-blocks > *,
.primary-entries > *,
.cluster-navigation > *,
.related-clusters-or-backlink > *,
.return-paths > * {
  grid-column: span 4;
}

.top-card,
.top-3-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
}

.top-card__body,
.top-3-card__body {
  padding: 24px;
  display: grid;
  gap: var(--space-16);
}

.top-card__rank,
.top-3-card__rank {
  font-size: var(--font-size-12);
  line-height: var(--line-height-12);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.facts-grid,
.standard-facts,
.profile-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-12);
}

.fact-item,
.facts-grid > div,
.standard-facts > div,
.profile-facts > div {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  padding: var(--space-16);
}

.fact-key,
.facts-grid dt,
.standard-facts dt,
.profile-facts dt {
  font-size: var(--font-size-12);
  line-height: var(--line-height-12);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin: 0 0 var(--space-8);
}

.fact-value,
.facts-grid dd,
.standard-facts dd,
.profile-facts dd {
  margin: 0;
  color: var(--color-text-primary);
  font-size: var(--font-size-16);
  line-height: var(--line-height-16);
}

.fact-value--unknown,
.is-unknown,
.not-yet-verified {
  color: var(--color-text-secondary);
  font-style: normal;
}

.compare-module,
.comparison-table-or-stacked-sections {
  display: grid;
  gap: var(--space-16);
}

.compare-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  background: var(--color-bg-surface);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.compare-table th,
.compare-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border-default);
  text-align: left;
  vertical-align: top;
}

.compare-table thead th {
  position: sticky;
  top: 0;
  background: var(--color-bg-surface);
  z-index: 1;
  font-size: var(--font-size-14);
  line-height: var(--line-height-14);
  font-weight: var(--font-weight-semibold);
}

.compare-table tbody tr:nth-child(even) {
  background: var(--color-bg-subtle);
}

.compare-stack {
  display: none;
  gap: var(--space-16);
}

.compare-stack__item {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  display: grid;
  gap: var(--space-12);
}

.compare-stack__row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--space-12);
  padding-top: var(--space-12);
  border-top: 1px solid var(--color-border-default);
}

.compare-stack__label {
  color: var(--color-text-secondary);
  font-size: var(--font-size-14);
}

.definition-list,
dl.definition-list {
  display: grid;
  grid-template-columns: minmax(160px, 240px) minmax(0, 1fr);
  gap: var(--space-12) var(--space-16);
}

dl.definition-list dt,
dl.definition-list dd {
  margin: 0;
}

dl.definition-list dt {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.section-divider {
  height: 1px;
  background: var(--color-border-default);
  border: 0;
}

.text-meta,
.updated-at,
.source-note,
.field-definitions {
  font-size: var(--font-size-14);
  line-height: var(--line-height-14);
  color: var(--color-text-secondary);
}

.mono,
.code-like,
.source-code {
  font-family: var(--font-mono);
  font-size: var(--font-size-14);
}

.site-footer {
  padding-block: var(--space-32);
  border-top: 1px solid var(--color-border-default);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-16);
}

@media (max-width: 900px) {
  .hero__grid,
  .page-intro__grid,
  .cluster-intro__grid,
  .profile-header__grid,
  .comparison-header__grid,
  .facts-grid,
  .standard-facts,
  .profile-facts {
    grid-template-columns: 1fr;
  }

  .grid,
  .cards-grid,
  .profile-links,
  .standardized-cafe-cards,
  .top-3-list,
  .top-3-blocks,
  .primary-entries,
  .cluster-navigation,
  .related-clusters-or-backlink,
  .return-paths {
    gap: var(--gutter-mobile);
  }

  .grid > *,
  .cards-grid > *,
  .profile-links > *,
  .standardized-cafe-cards > *,
  .top-3-list > *,
  .top-3-blocks > *,
  .primary-entries > *,
  .cluster-navigation > *,
  .related-clusters-or-backlink > *,
  .return-paths > * {
    grid-column: span 6;
  }
}

@media (max-width: 760px) {
  .site-header,
  .site-header__inner {
    min-height: var(--header-height-mobile);
  }

  .site-nav {
    position: relative;
  }

  .site-nav__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav__list {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 240px;
    padding: var(--space-8);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav__list.is-open {
    display: flex;
  }

  .site-nav__list a {
    width: 100%;
  }

  .grid > *,
  .cards-grid > *,
  .profile-links > *,
  .standardized-cafe-cards > *,
  .top-3-list > *,
  .top-3-blocks > *,
  .primary-entries > *,
  .cluster-navigation > *,
  .related-clusters-or-backlink > *,
  .return-paths > * {
    grid-column: 1 / -1;
  }

  .compare-table-wrap {
    display: none;
  }

  .compare-stack {
    display: grid;
  }

  .definition-list,
  dl.definition-list,
  .compare-stack__row {
    grid-template-columns: 1fr;
  }

  h1,
  .text-h1,
  .hero h1.hero__title {
    max-width: none;
  }
}