:root {
  --bg: #f6f7f9;
  --paper: #ffffff;
  --paper-soft: #f0f4f3;
  --ink: #182026;
  --muted: #5d6a73;
  --line: #d8dee3;
  --teal: #0f766e;
  --teal-dark: #0b5751;
  --amber: #b45309;
  --indigo: #4f46e5;
  --red: #b91c1c;
  --shadow: 0 12px 30px rgba(24, 32, 38, 0.08);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  letter-spacing: 0;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 20;
  transform: translateY(-180%);
  background: var(--ink);
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner,
.section-inner {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.header-inner {
  min-height: 112px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  padding: 18px 0;
}

.identity h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 4.1rem);
  line-height: 0.95;
  font-weight: 760;
}

.eyebrow,
.section-kicker {
  margin: 0 0 8px;
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 760;
  text-transform: uppercase;
}

.headline {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 760px;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.top-nav a,
.action-link,
.text-link {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 12px;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
}

.top-nav a:hover,
.action-link:hover,
.text-link:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

.section {
  padding: 68px 0;
}

.section-band {
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.overview-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.85fr);
  gap: 24px;
  align-items: stretch;
}

.copy-block h2,
.section-heading h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.06;
  font-weight: 720;
}

.lead-text {
  max-width: 900px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.boundary-panel,
.claim-grid article,
.metric-card,
.candidate-card,
.alignn-panel,
.reliability-card,
.table-shell,
.figure-preview,
.details-stack details {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.boundary-panel {
  padding: 22px;
}

.boundary-panel h3,
.claim-grid h3,
.candidate-card h3,
.alignn-panel h3,
.reliability-card h3 {
  margin: 0;
  font-size: 1rem;
}

.boundary-panel p {
  margin: 12px 0 18px;
  color: var(--muted);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.metric-card {
  min-height: 132px;
  padding: 18px;
  display: grid;
  align-content: space-between;
}

.metric-card .value {
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  line-height: 1;
  font-weight: 760;
  color: var(--teal-dark);
}

.metric-card .label {
  margin: 12px 0 0;
  color: var(--ink);
  font-weight: 690;
}

.metric-card .note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.section-heading {
  margin-bottom: 22px;
}

.section-note {
  max-width: 820px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.split-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
}

.funnel-chart {
  display: grid;
  gap: 12px;
}

.funnel-row {
  display: grid;
  grid-template-columns: minmax(180px, 260px) minmax(0, 1fr) minmax(80px, 120px);
  gap: 14px;
  align-items: center;
  min-height: 52px;
}

.funnel-label {
  font-weight: 690;
}

.funnel-value {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.funnel-track {
  height: 16px;
  background: #e4e8ec;
  border-radius: 999px;
  overflow: hidden;
}

.funnel-bar {
  height: 100%;
  min-width: 6px;
  background: linear-gradient(90deg, var(--teal), var(--indigo));
  border-radius: inherit;
}

.funnel-ratio {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.85rem;
}

.alignn-panel {
  margin-top: 22px;
  padding: 20px;
}

.alignn-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.alignn-header p {
  max-width: 780px;
  margin: 8px 0 0;
  color: var(--muted);
}

.mini-stat-grid,
.alignn-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.mini-stat {
  min-height: 82px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  background: #fbfcfd;
}

.mini-stat span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.mini-stat strong {
  display: block;
  margin-top: 8px;
  font-size: 1.2rem;
}

.candidate-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.candidate-card {
  padding: 18px;
  min-height: 172px;
}

.candidate-card h3 {
  font-size: 1.28rem;
}

.candidate-card .mobility {
  margin: 14px 0 8px;
  font-size: 1.4rem;
  font-weight: 740;
  color: var(--teal-dark);
}

.candidate-card p {
  margin: 6px 0;
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 8px;
  color: var(--muted);
  font-size: 0.8rem;
  background: #fbfcfd;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(170px, 220px) minmax(190px, 240px);
  gap: 12px;
  margin: 0 0 14px;
}

.database-toolbar {
  grid-template-columns: minmax(280px, 1fr) minmax(220px, 280px);
}

.database-summary {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.database-source {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  color: var(--muted);
}

.database-source strong {
  color: var(--teal-dark);
  font-size: 1.35rem;
}

.database-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.db-chip,
.db-table {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fbfcfd;
  color: var(--muted);
  padding: 4px 10px;
  font-size: 0.82rem;
}

.field {
  display: grid;
  gap: 6px;
}

.field span {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 680;
}

.field input,
.field select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  padding: 8px 10px;
}

.field input:focus,
.field select:focus,
.data-table button:focus,
.figure-tab:focus,
.qa-form button:focus,
.question-suggestions button:focus {
  outline: 3px solid rgba(15, 118, 110, 0.22);
  outline-offset: 2px;
}

.table-shell {
  overflow: hidden;
}

.table-status {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.table-scroll {
  overflow-x: auto;
}

.database-shell {
  padding-bottom: 6px;
}

.database-results {
  display: grid;
  gap: 10px;
  padding: 12px;
}

.db-result {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcfd;
  padding: 14px;
}

.db-result-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.db-result h3 {
  margin: 0;
  font-size: 1rem;
}

.db-result p {
  margin: 10px 0 12px;
  color: var(--muted);
}

.db-result dl {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
}

.db-result dl div {
  min-width: 0;
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

.db-result dt {
  color: var(--muted);
  font-size: 0.76rem;
}

.db-result dd {
  margin: 3px 0 0;
  overflow-wrap: anywhere;
  font-size: 0.9rem;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: #f4f6f8;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
}

.data-table th button {
  width: 100%;
  min-height: 28px;
  border: 0;
  background: transparent;
  color: inherit;
  padding: 0;
  text-align: left;
  cursor: pointer;
  font-weight: 760;
}

.data-table tbody tr:hover {
  background: #f8fbfa;
}

.numeric {
  font-variant-numeric: tabular-nums;
}

.reliability-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.reliability-card {
  padding: 20px;
}

.stacked-bar {
  display: flex;
  width: 100%;
  height: 22px;
  overflow: hidden;
  border-radius: 999px;
  background: #e4e8ec;
  margin: 16px 0 12px;
}

.segment {
  min-width: 2px;
}

.segment.retained {
  background: var(--teal);
}

.segment.withheld {
  background: var(--amber);
}

.segment.failed {
  background: var(--red);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 0.86rem;
}

.legend span::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-radius: 2px;
  vertical-align: -1px;
}

.legend .retained::before {
  background: var(--teal);
}

.legend .withheld::before {
  background: var(--amber);
}

.legend .failed::before {
  background: var(--red);
}

.figure-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.figure-tab {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  padding: 8px 12px;
  color: var(--ink);
  cursor: pointer;
}

.figure-tab[aria-selected="true"] {
  border-color: var(--teal);
  background: var(--paper-soft);
  color: var(--teal-dark);
  font-weight: 720;
}

.figure-preview {
  padding: 16px;
}

.figure-preview h3 {
  margin: 0 0 12px;
}

.figure-preview img {
  display: block;
  width: 100%;
  max-height: 72vh;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
}

.figure-preview img {
  height: auto;
  object-fit: contain;
}

.details-stack {
  display: grid;
  gap: 12px;
}

.details-stack details {
  padding: 0;
}

.details-stack summary {
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 720;
}

.details-content {
  padding: 0 18px 18px;
}

.details-note {
  margin: 0 18px 12px;
  color: var(--muted);
}

.source-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
}

.qa-panel {
  display: grid;
  gap: 14px;
}

.qa-form {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) 96px;
  gap: 12px;
  align-items: end;
}

.qa-form button,
.question-suggestions button {
  min-height: 42px;
  border: 1px solid var(--teal);
  border-radius: 6px;
  cursor: pointer;
}

.qa-form button {
  background: var(--teal);
  color: white;
  font-weight: 720;
}

.question-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.question-suggestions button {
  background: var(--paper);
  color: var(--teal-dark);
  padding: 8px 12px;
}

.question-suggestions button:hover {
  background: var(--paper-soft);
}

.qa-answer {
  display: grid;
  gap: 12px;
}

.qa-answer-main,
.qa-citation {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.qa-answer-main {
  padding: 18px;
  box-shadow: var(--shadow);
}

.qa-answer-main p {
  margin: 8px 0 0;
  max-width: 980px;
}

.qa-answer-label {
  display: block;
  color: var(--teal-dark);
  font-size: 0.78rem;
  font-weight: 760;
  text-transform: uppercase;
}

.qa-citations {
  display: grid;
  gap: 10px;
}

.qa-citation {
  padding: 14px;
}

.qa-citation-source {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 680;
}

.qa-citation h3 {
  margin: 6px 0 8px;
  font-size: 1rem;
}

.qa-citation p {
  margin: 0;
  color: var(--muted);
}

.claim-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.claim-grid article {
  padding: 20px;
}

.claim-grid ul {
  margin: 14px 0 0;
  padding-left: 20px;
}

.claim-grid li {
  margin: 8px 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.footer-inner {
  min-height: 78px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.noscript {
  margin: 16px;
  padding: 12px;
  border: 1px solid var(--red);
  border-radius: 6px;
  background: #fff5f5;
  color: var(--red);
}

.error-box {
  border: 1px solid var(--red);
  border-radius: var(--radius);
  background: #fff5f5;
  color: var(--red);
  padding: 16px;
}

@media (max-width: 980px) {
  .header-inner,
  .overview-layout,
  .split-heading,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .header-inner {
    min-height: 0;
  }

  .top-nav {
    justify-content: flex-start;
  }

  .metric-grid,
  .candidate-grid,
  .mini-stat-grid,
  .alignn-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toolbar,
  .qa-form,
  .reliability-grid,
  .claim-grid {
    grid-template-columns: 1fr;
  }

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

  .funnel-row {
    grid-template-columns: 1fr;
  }

  .funnel-value {
    text-align: left;
  }
}

@media (max-width: 640px) {
  .header-inner,
  .section-inner {
    width: min(100% - 24px, var(--max));
  }

  .site-header {
    position: static;
  }

  .section {
    padding: 46px 0;
  }

  .metric-grid,
  .candidate-grid,
  .alignn-metrics,
  .mini-stat-grid,
  .db-result dl {
    grid-template-columns: 1fr;
  }

  .top-nav a,
  .action-link,
  .text-link,
  .figure-tab {
    width: 100%;
  }

}