:root {
  --ink: #171b1d;
  --muted: #566166;
  --line: #cbd2d4;
  --soft-line: #e8ecee;
  --paper: #ffffff;
  --wash: #f5f8f8;
  --teal: #006b70;
  --teal-dark: #004f54;
  --red: #aa2d23;
  --red-dark: #7f211a;
  --ochre: #a96f00;
  --focus: #1e6cc7;
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", Aptos, Arial, sans-serif;
  line-height: 1.55;
}

a {
  color: var(--teal-dark);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--red-dark);
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-150%);
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.97);
}

.brand {
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 26px;
}

nav a {
  color: var(--ink);
  font-size: 0.92rem;
  text-decoration: none;
}

nav a:hover {
  color: var(--teal);
}

main > section {
  scroll-margin-top: 70px;
}

.hero,
.evidence-section,
.interpretation-section,
.chapter-section,
.methods-section,
.sources-section,
footer {
  padding-right: max(24px, calc((100vw - var(--max)) / 2));
  padding-left: max(24px, calc((100vw - var(--max)) / 2));
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 42px;
  align-items: end;
  min-height: 390px;
  padding-top: 62px;
  padding-bottom: 54px;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 1000px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 1120px;
  margin-bottom: 20px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 6vw, 5.25rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy > p {
  max-width: 850px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 1.22rem;
}

.boundary-note {
  padding-left: 18px;
  border-left: 5px solid var(--ochre);
  color: var(--ink) !important;
  font-weight: 650;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 2px solid var(--teal);
  border-radius: 4px;
  color: var(--teal-dark);
  font-weight: 700;
  text-decoration: none;
}

.primary-link:hover {
  background: var(--teal);
  color: #fff;
}

.evidence-section,
.interpretation-section,
.chapter-section,
.methods-section,
.sources-section {
  padding-top: 76px;
  padding-bottom: 82px;
}

.interpretation-section,
.methods-section {
  background: var(--wash);
}

.section-heading {
  display: flex;
  gap: 24px;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 30px;
}

h2 {
  margin-bottom: 8px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 3.5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-heading p {
  margin-bottom: 0;
  color: var(--muted);
}

.view-tabs {
  display: flex;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 5px;
}

.view-tabs button {
  min-height: 42px;
  padding: 0 16px;
  border: 0;
  border-right: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 650;
  cursor: pointer;
}

.view-tabs button:last-child {
  border-right: 0;
}

.view-tabs button[aria-selected="true"] {
  background: var(--ink);
  color: #fff;
}

.stage-rail {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  overflow: hidden;
  border-radius: 5px 5px 0 0;
}

.stage {
  display: flex;
  gap: 11px;
  align-items: baseline;
  padding: 15px 22px;
  color: #fff;
}

.stage span {
  font-size: 1.35rem;
  font-weight: 800;
}

.stage strong {
  font-size: 1.05rem;
}

.stage-2024,
.stage-2026 {
  background: var(--teal);
}

.stage-2025 {
  background: var(--red);
}

.chart-panel {
  min-height: 470px;
  border: 1px solid var(--line);
  border-top: 0;
}

.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1.18fr 1.12fr;
  min-height: 470px;
}

.wave {
  padding: 34px 30px;
  border-right: 1px solid var(--line);
}

.wave:last-child {
  border-right: 0;
}

.wave-source {
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
}

.wave-value {
  margin-bottom: 4px;
  color: var(--teal);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 4.4rem;
  font-weight: 700;
  line-height: 1;
}

.wave-2025 .wave-value {
  color: var(--red);
}

.wave-description {
  max-width: 24ch;
  font-size: 1.02rem;
}

.wave-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.wave-list li {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 12px;
  padding: 13px 0;
  border-top: 1px solid var(--soft-line);
}

.wave-list strong {
  color: var(--teal);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.5rem;
}

.wave-2025 .wave-list strong {
  color: var(--red);
}

.wave-note {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.84rem;
}

.comparison-view,
.guidance-view {
  padding: 34px 32px 40px;
}

.chart-intro {
  max-width: 860px;
  margin-bottom: 30px;
  color: var(--muted);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 46px;
}

.comparison-column h3,
.guidance-view h3 {
  margin-bottom: 5px;
  font-size: 1.18rem;
}

.comparison-column > p {
  color: var(--muted);
  font-size: 0.88rem;
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(145px, 1.2fr) minmax(180px, 3fr) 58px;
  gap: 12px;
  align-items: center;
  margin: 15px 0;
}

.bar-label {
  font-size: 0.9rem;
}

.bar-track {
  height: 18px;
  background: #e5eaeb;
}

.bar-fill {
  display: block;
  height: 100%;
  background: var(--teal);
}

.bar-fill.red {
  background: var(--red);
}

.bar-fill.formal {
  background: var(--red);
}

.bar-value {
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  text-align: right;
}

.legend {
  display: flex;
  gap: 22px;
  margin-bottom: 22px;
  font-size: 0.88rem;
}

.legend span {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.legend i {
  width: 14px;
  height: 14px;
  background: var(--teal);
}

.legend .formal-key {
  background: var(--red);
}

.guidance-pair {
  margin-bottom: 20px;
}

.guidance-pair > p {
  margin-bottom: 7px;
  font-size: 0.9rem;
  font-weight: 650;
}

.paired-bar {
  display: grid;
  grid-template-columns: 1fr 58px;
  gap: 12px;
  align-items: center;
  margin: 5px 0;
}

.paired-track {
  height: 12px;
  background: #e5eaeb;
}

.paired-track span {
  display: block;
  height: 100%;
}

.asymmetry-grid {
  display: grid;
  grid-template-columns: 1fr 240px 1fr;
  gap: 36px;
  align-items: end;
}

.asymmetry-side {
  padding: 28px 0;
  border-top: 5px solid var(--teal);
  border-bottom: 1px solid var(--line);
}

.asymmetry-side.concern {
  border-top-color: var(--red);
}

.measure-label {
  margin-bottom: 14px;
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
}

.large-value {
  margin-bottom: 6px;
  color: var(--teal);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(4rem, 8vw, 7.5rem);
  font-weight: 700;
  line-height: 0.9;
}

.concern .large-value {
  color: var(--red);
}

.single-bar {
  height: 22px;
  margin-top: 28px;
  background: #dfe5e6;
}

.single-bar span {
  display: block;
  height: 100%;
  background: var(--teal);
}

.concern .single-bar span {
  background: var(--red);
}

.asymmetry-note {
  padding: 24px 0;
  color: var(--muted);
  text-align: center;
}

.asymmetry-note strong {
  color: var(--ink);
}

.interpretive-claim {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 34px;
  margin-top: 48px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.interpretive-claim h3,
.interpretive-claim p {
  margin: 0;
}

.chapter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.chapter-grid article {
  padding: 34px 42px 38px 0;
}

.chapter-grid article + article {
  padding-right: 0;
  padding-left: 42px;
  border-left: 1px solid var(--line);
}

.chapter-number {
  margin-bottom: 10px;
  color: var(--teal);
  font-weight: 800;
  text-transform: uppercase;
}

.chapter-number.future {
  color: var(--red);
}

.chapter-grid h3 {
  margin-bottom: 12px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.75rem;
}

.chapter-grid li,
.methods-grid li {
  margin-bottom: 8px;
}

.methods-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-bottom: 44px;
}

.methods-grid > div:last-child {
  padding-left: 30px;
  border-left: 5px solid var(--ochre);
}

.method-table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

caption {
  padding-bottom: 12px;
  font-weight: 750;
  text-align: left;
}

th,
td {
  padding: 14px 16px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #eaf0f0;
}

.source-list {
  max-width: 1050px;
  margin: 0;
  padding-left: 26px;
}

.source-list li {
  margin-bottom: 18px;
  padding-left: 8px;
}

.source-list a {
  white-space: nowrap;
}

.source-note {
  max-width: 980px;
  margin: 34px 0 0;
  padding: 22px 24px;
  border-left: 5px solid var(--ochre);
  background: var(--wash);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 26px;
  padding-bottom: 26px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

footer p {
  margin: 0;
}

.noscript-note {
  padding: 24px;
  border: 1px solid var(--line);
}

@media (max-width: 900px) {
  .site-header {
    position: static;
    align-items: flex-start;
    padding-top: 15px;
    padding-bottom: 15px;
  }

  nav {
    gap: 14px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .overview-grid,
  .comparison-grid,
  .asymmetry-grid,
  .chapter-grid,
  .methods-grid {
    grid-template-columns: 1fr;
  }

  .wave {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .wave:last-child {
    border-bottom: 0;
  }

  .asymmetry-note {
    text-align: left;
  }

  .chapter-grid article + article {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .methods-grid > div:last-child {
    padding-top: 8px;
  }
}

@media (max-width: 680px) {
  .site-header {
    display: block;
  }

  .brand {
    display: block;
    margin-bottom: 10px;
  }

  nav {
    justify-content: flex-start;
  }

  h1 {
    font-size: 2.75rem;
  }

  .hero,
  .evidence-section,
  .interpretation-section,
  .chapter-section,
  .methods-section,
  .sources-section,
  footer {
    padding-right: 18px;
    padding-left: 18px;
  }

  .hero {
    padding-top: 42px;
    padding-bottom: 36px;
  }

  .hero-copy > p {
    font-size: 1.05rem;
  }

  .evidence-section {
    padding-top: 46px;
  }

  .section-heading {
    display: block;
  }

  .view-tabs {
    margin-top: 20px;
  }

  .view-tabs button {
    flex: 1 1 0;
    padding: 0 10px;
  }

  .stage-rail {
    grid-template-columns: 1fr;
  }

  .stage {
    padding: 11px 16px;
  }

  .chart-panel {
    min-height: 0;
  }

  .comparison-view,
  .guidance-view {
    padding: 26px 16px 32px;
  }

  .bar-row {
    grid-template-columns: 1fr 50px;
  }

  .bar-track {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .interpretive-claim {
    grid-template-columns: 1fr;
  }

  .chapter-grid article,
  .chapter-grid article + article {
    padding: 28px 0;
  }

  .source-list a {
    white-space: normal;
    overflow-wrap: anywhere;
  }

  footer {
    display: block;
  }

  footer p + p {
    margin-top: 8px;
  }
}

@media print {
  .site-header,
  .primary-link,
  .view-tabs {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 34px;
  }

  .evidence-section,
  .interpretation-section,
  .chapter-section,
  .methods-section,
  .sources-section {
    break-inside: avoid;
    padding-top: 34px;
    padding-bottom: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* Citation line in the footer: this companion is cited as Miner (2026a) from the
   proposal and from three sibling public artifacts, so the DOI must be visible here. */
footer .cite-line {
  max-width: 68ch;
  margin-inline: auto;
  text-wrap: pretty;
}
footer .cite-line em { font-style: italic; }