:root {
  --bg-primary: #F7F4EE;
  --bg-secondary: #EFE9DE;
  --surface-primary: #FFFDFC;
  --surface-muted: #F2EEE6;
  --text-primary: #1F1F1B;
  --text-secondary: #4E4A43;
  --text-weak: #6F6A61;
  --border-strong: #B8B0A3;
  --border-standard: #D7D0C4;
  --border-subtle: #E6E0D6;

  --intent-historic-strong: #6E4B3A;
  --intent-historic-medium: #8B6652;
  --intent-historic-surface: #E8DDD4;
  --intent-historic-text: #5A3D30;

  --intent-work-strong: #2F5D50;
  --intent-work-medium: #4B7A6D;
  --intent-work-surface: #DCEAE4;
  --intent-work-text: #244A40;

  --status-verified-bg: #E3F1E8;
  --status-verified-text: #234B33;
  --status-verified-border: #99C3A8;

  --status-provisional-bg: #F4EACF;
  --status-provisional-text: #6D5317;
  --status-provisional-border: #D9BF73;

  --status-unverified-bg: #F1E8E3;
  --status-unverified-text: #7A4C3A;
  --status-unverified-border: #CFA08F;

  --link: #1F1F1B;
  --link-hover: #6E4B3A;
  --focus: #1D4ED8;

  --font-serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --font-sans: Inter, "Helvetica Neue", Arial, sans-serif;

  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 40px;
  --space-8: 48px;
  --space-9: 64px;
  --space-10: 80px;
  --space-11: 96px;

  --container-max: 1120px;
  --measure: 680px;
  --compare-max: 960px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-line: 0 1px 0 rgba(31,31,27,0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}

a {
  color: var(--link);
  text-decoration-color: currentColor;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--link-hover);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font: inherit;
}

p,
ul,
ol,
dl {
  margin: 0 0 var(--space-4);
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-4);
  color: var(--text-primary);
}

.page-title,
h1.display-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(32px, 4vw, 40px);
  line-height: 1.2;
}

h1,
.h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(28px, 3.2vw, 32px);
  line-height: 1.25;
}

h2,
.h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(22px, 2.4vw, 24px);
  line-height: 1.333;
}

h3,
.h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(18px, 2vw, 20px);
  line-height: 1.4;
}

h4,
.h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.45;
}

.text-large {
  font-size: 18px;
  line-height: 1.667;
}

.text-body {
  font-size: 16px;
  line-height: 1.75;
}

.text-compact {
  font-size: 15px;
  line-height: 1.6;
}

.ui-label {
  font-size: 14px;
  line-height: 1.43;
  font-weight: 500;
}

.caption,
.meta,
small {
  font-size: 13px;
  line-height: 1.385;
  color: var(--text-weak);
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -48px;
  background: var(--surface-primary);
  color: var(--text-primary);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  z-index: 1000;
}

.skip-link:focus {
  top: var(--space-4);
}

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

.reading-width {
  width: min(100%, var(--measure));
}

.compare-width {
  width: min(100%, var(--compare-max));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247,244,238,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
}

.site-header__inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: min(100% - 32px, var(--container-max));
  margin-inline: auto;
  padding: var(--space-3) 0;
}

.site-brand {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.4;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--border-standard);
  background: var(--surface-primary);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.site-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: var(--space-2) var(--space-2);
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.43;
  font-weight: 500;
}

.site-nav__link:hover {
  color: var(--text-primary);
}

.site-nav__link[aria-current="page"] {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}

.site-nav__link--compare {
  font-weight: 600;
  border-bottom-color: var(--text-primary);
  color: var(--text-primary);
}

main {
  display: block;
}

.page {
  padding: var(--space-8) 0 var(--space-10);
}

.section {
  padding: var(--space-9) 0 0;
}

.section:first-child {
  padding-top: 0;
}

.page-intro,
.card,
.panel,
.callout,
.matrix-wrap,
.profile-header,
.faq-item,
.legend,
.signal-block {
  background: var(--surface-primary);
  border: 1px solid var(--border-standard);
  border-radius: var(--radius-lg);
}

.page-intro,
.card,
.panel,
.callout,
.profile-header,
.legend,
.signal-block {
  padding: var(--space-5);
}

.card--compact,
.faq-item {
  padding: var(--space-4);
}

.page-kicker,
.section-kicker {
  display: inline-block;
  margin-bottom: var(--space-3);
  color: var(--text-weak);
  font-size: 13px;
  line-height: 1.385;
}

.lead {
  font-size: 18px;
  line-height: 1.667;
  color: var(--text-secondary);
  max-width: var(--measure);
}

.grid {
  display: grid;
  gap: var(--space-5);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stack > * + * {
  margin-top: var(--space-4);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.button,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface-primary);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
}

.button:hover,
.button-link:hover {
  border-color: var(--text-primary);
}

.button--primary-compare {
  font-weight: 600;
  border-width: 1px;
  border-color: var(--text-primary);
}

.intent-badge,
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 12px;
  line-height: 1.333;
  font-weight: 600;
  white-space: nowrap;
}

.intent-badge--historic {
  background: var(--intent-historic-surface);
  color: var(--intent-historic-text);
  border-color: var(--intent-historic-medium);
}

.intent-badge--work {
  background: var(--intent-work-surface);
  color: var(--intent-work-text);
  border-color: var(--intent-work-medium);
}

.status-badge--verified {
  background: var(--status-verified-bg);
  color: var(--status-verified-text);
  border-color: var(--status-verified-border);
}

.status-badge--provisional {
  background: var(--status-provisional-bg);
  color: var(--status-provisional-text);
  border-color: var(--status-provisional-border);
}

.status-badge--unverified {
  background: var(--status-unverified-bg);
  color: var(--status-unverified-text);
  border-color: var(--status-unverified-border);
}

.track-frame {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.track-card {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-standard);
  background: var(--surface-primary);
}

.track-card--historic {
  border-left: 4px solid var(--intent-historic-strong);
}

.track-card--work {
  border-left: 4px solid var(--intent-work-strong);
}

.compare-layout {
  width: min(100%, var(--compare-max));
  margin-inline: auto;
}

.matrix-wrap {
  overflow-x: auto;
  padding: 0;
}

.compare-table {
  width: 100%;
  min-width: 720px;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--surface-primary);
}

.compare-table thead th {
  position: sticky;
  top: 64px;
  background: var(--surface-primary);
  box-shadow: var(--shadow-line);
  z-index: 2;
}

.compare-table th,
.compare-table td {
  padding: var(--space-4);
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border-subtle);
  min-height: 56px;
}

.compare-table th[scope="col"] {
  font-size: 20px;
  line-height: 1.4;
  font-weight: 600;
  color: var(--text-primary);
}

.compare-table th[scope="row"] {
  font-size: 14px;
  line-height: 1.43;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--surface-muted);
}

.compare-cell {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
}

.compare-cell .status-badge {
  margin-top: var(--space-2);
}

.axis-list {
  display: grid;
  gap: var(--space-4);
}

.axis-item {
  padding: var(--space-4);
  border: 1px solid var(--border-standard);
  border-radius: var(--radius-md);
  background: var(--surface-primary);
}

.axis-item__label {
  font-size: 14px;
  line-height: 1.43;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.profile-header {
  display: grid;
  gap: var(--space-4);
}

.profile-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.profile-summary {
  max-width: var(--measure);
}

.jump-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  list-style: none;
  margin: 0;
}

.jump-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--border-standard);
  border-radius: 999px;
  background: var(--surface-primary);
  text-decoration: none;
}

.definition-list {
  display: grid;
  gap: var(--space-4);
}

.definition-row {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.definition-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.definition-term {
  font-size: 14px;
  line-height: 1.43;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.definition-value {
  font-size: 15px;
  line-height: 1.6;
}

.inline-status {
  display: inline-flex;
  vertical-align: middle;
  margin-left: var(--space-2);
}

.faq-list {
  display: grid;
  gap: var(--space-3);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-weight: 600;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item__content {
  margin-top: var(--space-3);
  color: var(--text-secondary);
}

.site-footer {
  margin-top: var(--space-10);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-7) 0;
}

.site-footer__inner {
  width: min(100% - 32px, var(--container-max));
  margin-inline: auto;
  display: grid;
  gap: var(--space-4);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 1024px) {
  .site-shell,
  .container,
  .site-header__inner,
  .site-footer__inner {
    width: min(100% - 48px, var(--container-max));
  }

  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .site-shell,
  .container,
  .site-header__inner,
  .site-footer__inner {
    width: min(100% - 32px, var(--container-max));
  }

  .page {
    padding: var(--space-7) 0 var(--space-9);
  }

  .section {
    padding-top: var(--space-7);
  }

  .grid--2,
  .grid--3,
  .track-frame {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    padding: 0 16px 16px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-subtle);
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-3);
    background: var(--surface-primary);
    border: 1px solid var(--border-standard);
    border-radius: var(--radius-lg);
  }

  .site-nav__link {
    width: 100%;
    justify-content: space-between;
    padding-inline: var(--space-3);
  }

  .compare-table {
    display: none;
  }

  .compare-cards {
    display: grid;
    gap: var(--space-4);
  }
}

@media (min-width: 769px) {
  .compare-cards {
    display: none;
  }
}

@media (max-width: 480px) {
  .page-intro,
  .card,
  .panel,
  .callout,
  .profile-header,
  .legend,
  .signal-block {
    padding: var(--space-4);
  }
}