:root {
  color-scheme: light;
  --paper: #f3efe4;
  --paper-deep: #e8dfce;
  --surface: #fffaf0;
  --surface-strong: #ffffff;
  --ink: #1d1930;
  --muted: #625e70;
  --line: rgba(29, 25, 48, 0.16);
  --line-strong: rgba(29, 25, 48, 0.34);
  --accent: #c74935;
  --accent-ink: #7c2115;
  --accent-two: #23766f;
  --spark: #f0c95a;
  --night: #211a3a;
  --night-ink: #fffaf0;
  --shadow: 0 24px 70px rgba(37, 29, 21, 0.12);
  --radius: 26px;
  --serif: Georgia, "Times New Roman", "Songti SC", serif;
  --sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

html[data-theme="art"] {
  --paper: #f2eee7;
  --paper-deep: #ded5ca;
  --surface: #fffaf5;
  --surface-strong: #fffefd;
  --ink: #241d1a;
  --muted: #675e59;
  --line: rgba(36, 29, 26, 0.17);
  --line-strong: rgba(36, 29, 26, 0.38);
  --accent: #d7476f;
  --accent-ink: #8e1f40;
  --accent-two: #2457b6;
  --spark: #f2ac3c;
  --night: #241d1a;
  --night-ink: #fffaf5;
}

html[data-theme="science"] {
  color-scheme: dark;
  --paper: #081e2b;
  --paper-deep: #06161f;
  --surface: #102b38;
  --surface-strong: #173746;
  --ink: #ecf8f6;
  --muted: #a9c4c6;
  --line: rgba(221, 246, 242, 0.15);
  --line-strong: rgba(221, 246, 242, 0.35);
  --accent: #b9dc45;
  --accent-ink: #f0ffab;
  --accent-two: #52c7d8;
  --spark: #ffc765;
  --night: #e7f6f3;
  --night-ink: #081e2b;
  --shadow: 0 26px 80px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  background:
    radial-gradient(circle at 6% 8%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 28rem),
    radial-gradient(circle at 95% 32%, color-mix(in srgb, var(--accent-two) 10%, transparent), transparent 32rem),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.62;
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
}

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

button,
select,
input[type="range"] {
  accent-color: var(--accent);
}

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

a {
  color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--spark);
  outline-offset: 4px;
}

::selection {
  background: var(--spark);
  color: #17120e;
}

.skip-link {
  background: var(--ink);
  border-radius: 0 0 10px 10px;
  color: var(--paper);
  font-weight: 750;
  left: 1rem;
  padding: 0.7rem 1rem;
  position: fixed;
  top: -5rem;
  z-index: 200;
}

.skip-link:focus {
  top: 0;
}

.sr-only {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

.masthead,
.section-shell {
  margin-inline: auto;
  max-width: 1420px;
  padding-inline: clamp(1.1rem, 4vw, 4rem);
  width: 100%;
}

.masthead {
  align-items: center;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  min-height: 82px;
  position: sticky;
  top: 0;
  z-index: 80;
}

.wordmark {
  align-items: center;
  display: inline-flex;
  font-weight: 850;
  gap: 0.75rem;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.wordmark-mark {
  align-items: flex-end;
  display: inline-flex;
  gap: 3px;
  height: 30px;
  transform: skew(-8deg);
  width: 31px;
}

.wordmark-mark i {
  background: var(--accent);
  display: block;
  height: 18px;
  width: 8px;
}

.wordmark-mark i:nth-child(2) {
  background: var(--accent-two);
  height: 30px;
}

.wordmark-mark i:nth-child(3) {
  background: var(--spark);
  height: 23px;
}

.masthead nav {
  display: flex;
  gap: clamp(1.2rem, 3vw, 2.8rem);
}

.masthead nav a {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 720;
  text-decoration: none;
}

.masthead nav a:hover {
  color: var(--ink);
}

.quiet-button,
.swap-button,
.view-toggle button,
.range-presets button,
.story-tabs button {
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 740;
  min-height: 46px;
  padding: 0.65rem 1rem;
}

.quiet-button:hover,
.swap-button:hover,
.view-toggle button:hover,
.range-presets button:hover,
.story-tabs button:hover {
  background: var(--surface);
  border-color: var(--accent);
}

.masthead > .quiet-button {
  justify-self: end;
}

.hero {
  align-items: center;
  display: grid;
  gap: clamp(2.5rem, 7vw, 7rem);
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, 0.92fr);
  margin-inline: auto;
  max-width: 1420px;
  min-height: calc(100vh - 82px);
  padding: clamp(4rem, 8vw, 8rem) clamp(1.1rem, 4vw, 4rem);
  position: relative;
}

.hero::before {
  border: 1px solid var(--line);
  border-radius: 50%;
  content: "";
  height: 24rem;
  left: -17rem;
  position: absolute;
  top: 6rem;
  width: 24rem;
}

.eyebrow,
.section-kicker {
  color: var(--accent-ink);
  font-size: 1rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  margin: 0 0 0.8rem;
  text-transform: uppercase;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(3.9rem, 7.8vw, 8.2rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 0.91;
  margin: 0;
  max-width: 820px;
}

.hero-lead {
  color: var(--muted);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.55;
  margin: 2rem 0 2.2rem;
  max-width: 720px;
}

.hero-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
}

.primary-action {
  align-items: center;
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--paper);
  cursor: pointer;
  display: inline-flex;
  font-weight: 790;
  justify-content: center;
  min-height: 52px;
  padding: 0.8rem 1.35rem;
  text-decoration: none;
}

.primary-action:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.text-action {
  border-bottom: 2px solid var(--line-strong);
  font-weight: 760;
  padding: 0.25rem 0;
  text-decoration: none;
}

.text-action span {
  color: var(--accent);
  display: inline-block;
  margin-left: 0.55rem;
}

.hero-stats {
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 3rem 0 0;
  max-width: 720px;
}

.hero-stats div {
  padding: 1.1rem 0.8rem 0 0;
}

.hero-stats div + div {
  border-left: 1px solid var(--line);
  padding-left: 1rem;
}

.hero-stats dt {
  color: var(--muted);
  font-size: 1rem;
}

.hero-stats dd {
  font-size: clamp(1.35rem, 2.5vw, 2.1rem);
  font-weight: 840;
  letter-spacing: -0.04em;
  margin: 0.2rem 0 0;
}

.hero-graphic {
  aspect-ratio: 1;
  background:
    radial-gradient(circle at center, color-mix(in srgb, var(--accent-two) 22%, transparent), transparent 52%),
    var(--night);
  border-radius: 50% 50% 10% 50%;
  box-shadow: var(--shadow);
  min-height: 420px;
  overflow: hidden;
  position: relative;
  transform: rotate(2deg);
}

.hero-graphic::after {
  border: 1px solid color-mix(in srgb, var(--night-ink) 24%, transparent);
  border-radius: 50%;
  content: "";
  inset: 11%;
  pointer-events: none;
  position: absolute;
}

#heroCanvas {
  height: 100%;
  inset: 0;
  position: absolute;
  transform: rotate(-2deg);
  width: 100%;
}

.hero-graphic-label {
  bottom: 7%;
  color: var(--night-ink);
  display: flex;
  font-size: 1rem;
  font-weight: 720;
  justify-content: space-between;
  left: 11%;
  position: absolute;
  right: 11%;
  transform: rotate(-2deg);
}

.hero-graphic-label b {
  color: var(--spark);
  letter-spacing: 0.1em;
}

.orientation {
  align-items: center;
  background: var(--night);
  color: var(--night-ink);
  display: grid;
  gap: 3rem;
  grid-template-columns: 1fr 1.15fr 0.85fr;
  padding: clamp(3rem, 6vw, 5rem) max(1.1rem, calc((100vw - 1292px) / 2));
}

.orientation .section-kicker {
  color: var(--spark);
}

.orientation h2 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1;
  margin: 0;
}

.orientation > p {
  color: color-mix(in srgb, var(--night-ink) 72%, transparent);
  margin: 0;
}

.legend {
  border-left: 1px solid color-mix(in srgb, var(--night-ink) 20%, transparent);
  display: grid;
  font-size: 1rem;
  gap: 0.65rem;
  padding-left: 2rem;
}

.legend span {
  align-items: center;
  display: flex;
  gap: 0.7rem;
}

.legend i {
  display: inline-block;
  flex: 0 0 auto;
  height: 11px;
  width: 11px;
}

.legend-dot {
  background: var(--accent-two);
  border-radius: 50%;
}

.legend-diamond {
  background: var(--spark);
  transform: rotate(45deg);
}

.legend-line {
  border-top: 2px dotted currentColor;
  height: 1px !important;
  width: 22px !important;
}

.compare-section,
.density-section,
.stories-section,
.method-section {
  padding-bottom: clamp(5rem, 10vw, 10rem);
  padding-top: clamp(5rem, 10vw, 10rem);
}

.section-heading {
  align-items: end;
  display: flex;
  gap: 3rem;
  justify-content: space-between;
  margin-bottom: 2.5rem;
}

.section-heading h2,
.explorer-intro h2,
.china-intro h2,
.classroom-copy h2,
.method-section h2 {
  font-family: var(--serif);
  font-size: clamp(2.8rem, 6vw, 6rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.98;
  margin: 0;
}

.section-heading > p {
  color: var(--muted);
  font-size: 1rem;
  margin: 0;
  max-width: 510px;
  text-align: right;
}

.compare-toolbar {
  align-items: end;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius) var(--radius) 0 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr auto 1fr auto;
  padding: 1.3rem;
}

.compare-toolbar label,
.filter-dock > label:not(.toggle-control),
.search-control {
  display: grid;
  gap: 0.35rem;
}

.compare-toolbar label > span,
.filter-dock label > span,
.search-control > label {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 780;
}

select,
input[type="search"] {
  background: var(--surface-strong);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  min-height: 49px;
  padding: 0.65rem 0.8rem;
  width: 100%;
}

.swap-button {
  border-radius: 12px;
  min-width: 92px;
}

.range-panel {
  background: color-mix(in srgb, var(--surface) 74%, var(--paper-deep));
  border: 1px solid var(--line);
  border-top: 0;
  display: grid;
  gap: 1rem 1.5rem;
  grid-template-columns: 220px 1fr 1fr;
  padding: 1.2rem 1.4rem;
}

.range-copy span,
.range-copy strong {
  display: block;
}

.range-copy span {
  color: var(--muted);
  font-size: 1rem;
}

.range-copy strong {
  font-size: 1rem;
}

input[type="range"] {
  cursor: pointer;
  min-height: 44px;
  width: 100%;
}

.range-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  grid-column: 2 / -1;
}

.range-presets button {
  font-size: 1rem;
  min-height: 38px;
  padding: 0.45rem 0.75rem;
}

.mobile-scroll-hint {
  color: var(--muted);
  display: none;
  font-size: 1rem;
  margin: 0 0 0.6rem;
}

.compare-stage {
  border-radius: 0 0 var(--radius) var(--radius);
}

.compare-axis {
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(var(--tick-count, 5), 1fr);
  min-height: 52px;
  padding: 0 0 0 200px;
}

.axis-tick {
  align-items: end;
  border-left: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  font-size: 1rem;
  padding: 0 0 0.35rem 0.45rem;
}

.axis-tick:last-child {
  border-right: 1px solid var(--line);
  justify-content: flex-end;
  padding-right: 0.45rem;
}

.compare-lanes {
  border: 1px solid var(--line);
  border-radius: 0 0 var(--radius) var(--radius);
  overflow: hidden;
}

.compare-lane {
  background: var(--surface);
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: 330px;
}

.compare-lane + .compare-lane {
  border-top: 1px solid var(--line-strong);
}

.lane-label {
  background: color-mix(in srgb, var(--surface) 78%, var(--paper-deep));
  border-right: 1px solid var(--line);
  padding: 1.4rem;
}

.lane-label span,
.lane-label small {
  color: var(--muted);
  display: block;
  font-size: 1rem;
}

.lane-label strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.65rem;
  line-height: 1.1;
  margin: 0.3rem 0 0.6rem;
}

.lane-track {
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 25% 100%;
  min-height: 330px;
  overflow: hidden;
  position: relative;
}

.lane-event {
  background: transparent;
  border: 0;
  cursor: pointer;
  left: var(--position);
  max-width: 150px;
  min-height: 44px;
  min-width: 112px;
  padding: 0 0 0 1rem;
  position: absolute;
  text-align: left;
  top: var(--level);
  transform: translateX(-7px);
}

.lane-event::before {
  background: var(--lane-color, var(--accent-two));
  border: 3px solid var(--surface);
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--lane-color, var(--accent-two));
  content: "";
  height: 13px;
  left: 0;
  position: absolute;
  top: 0.38rem;
  width: 13px;
}

.lane-event.is-china::before {
  background: var(--spark);
  border-radius: 2px;
  transform: rotate(45deg);
}

.lane-event span,
.lane-event small {
  display: block;
}

.lane-event span {
  font-size: 1rem;
  font-weight: 760;
  line-height: 1.25;
}

.lane-event small {
  color: var(--muted);
  font-size: 1rem;
}

.lane-event.is-right {
  padding: 0 1rem 0 0;
  text-align: right;
  transform: translateX(calc(-100% + 7px));
}

.lane-event.is-right::before {
  left: auto;
  right: 0;
}

.lane-overflow {
  bottom: 0.65rem;
  color: var(--muted);
  font-size: 1rem;
  position: absolute;
  right: 0.8rem;
}

.compare-summary {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 1rem;
}

.compare-summary article {
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  border: 1px solid var(--line);
  min-height: 118px;
  padding: 1rem;
}

.compare-summary article:first-child {
  border-radius: 16px 0 0 16px;
}

.compare-summary article:last-child {
  border-radius: 0 16px 16px 0;
}

.compare-summary span {
  color: var(--muted);
  display: block;
  font-size: 1rem;
}

.compare-summary strong {
  display: block;
  font-size: 1.05rem;
  margin-top: 0.3rem;
}

.density-section {
  border-top: 1px solid var(--line);
  padding-top: 5rem;
}

.compact-heading h2 {
  font-size: clamp(2.4rem, 4.5vw, 4.5rem);
}

.density-chart {
  align-items: end;
  border-bottom: 1px solid var(--line-strong);
  display: grid;
  gap: clamp(2px, 0.4vw, 7px);
  grid-auto-columns: minmax(24px, 1fr);
  grid-auto-flow: column;
  min-height: 260px;
  overflow-x: auto;
  padding: 2rem 0 0;
}

.density-bar {
  align-items: center;
  background: transparent;
  border: 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: flex-end;
  min-width: 24px;
  padding: 0;
  position: relative;
}

.density-bar i {
  background: linear-gradient(180deg, var(--spark), var(--accent));
  border-radius: 6px 6px 0 0;
  display: block;
  height: var(--height);
  max-height: 190px;
  min-height: 3px;
  opacity: 0.76;
  transition: opacity 160ms ease, transform 160ms ease;
  width: 100%;
}

.density-bar:hover i,
.density-bar:focus-visible i,
.density-bar.is-active i {
  opacity: 1;
  transform: scaleX(1.08);
}

.density-bar span {
  color: var(--muted);
  font-size: 1rem;
  margin-top: 0.55rem;
  min-height: 2.6em;
  writing-mode: vertical-rl;
}

.explorer-section {
  background: var(--night);
  color: var(--night-ink);
  padding: clamp(5rem, 10vw, 9rem) 0;
}

.explorer-intro {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
}

.explorer-intro .section-kicker {
  color: var(--spark);
  grid-column: 1 / -1;
  margin: 0;
}

.explorer-intro > p:last-child {
  color: color-mix(in srgb, var(--night-ink) 68%, transparent);
  margin: 0;
  max-width: 520px;
}

.filter-dock {
  align-items: end;
  background: color-mix(in srgb, var(--paper) 98%, transparent);
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  color: var(--ink);
  display: grid;
  gap: 0.8rem;
  grid-template-columns: minmax(260px, 1.55fr) repeat(3, minmax(130px, 0.72fr)) auto auto;
  margin: 3rem 0 2rem;
  padding: 1.1rem max(1.1rem, calc((100vw - 1292px) / 2));
  position: sticky;
  top: 82px;
  z-index: 60;
}

.search-control > div {
  position: relative;
}

.search-control div > span {
  color: var(--muted);
  font-size: 1.25rem;
  left: 0.8rem;
  position: absolute;
  top: 0.45rem;
}

.search-control input {
  padding-left: 2.35rem;
  padding-right: 2.3rem;
}

.search-control kbd {
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  font-size: 1rem;
  padding: 0.12rem 0.4rem;
  position: absolute;
  right: 0.65rem;
  top: 0.72rem;
}

.toggle-control {
  align-items: center;
  cursor: pointer;
  display: flex;
  gap: 0.55rem;
  min-height: 49px;
  white-space: nowrap;
}

.toggle-control input {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  position: absolute;
  width: 1px;
}

.toggle-track {
  background: var(--paper-deep);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  height: 26px;
  position: relative;
  width: 44px;
}

.toggle-track::after {
  background: var(--ink);
  border-radius: 50%;
  content: "";
  height: 18px;
  left: 3px;
  position: absolute;
  top: 3px;
  transition: transform 160ms ease;
  width: 18px;
}

.toggle-control input:checked + .toggle-track {
  background: var(--accent);
}

.toggle-control input:checked + .toggle-track::after {
  background: #fff;
  transform: translateX(18px);
}

.toggle-control input:focus-visible + .toggle-track {
  outline: 3px solid var(--spark);
  outline-offset: 3px;
}

.results-head {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}

.results-head p {
  color: color-mix(in srgb, var(--night-ink) 68%, transparent);
  margin: 0;
}

.view-toggle {
  display: flex;
  gap: 0.35rem;
}

.view-toggle button {
  border-color: color-mix(in srgb, var(--night-ink) 28%, transparent);
  color: var(--night-ink);
  min-height: 42px;
}

.view-toggle button[aria-pressed="true"] {
  background: var(--night-ink);
  color: var(--night);
}

.event-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.event-card {
  background: color-mix(in srgb, var(--night-ink) 7%, transparent);
  border: 1px solid color-mix(in srgb, var(--night-ink) 15%, transparent);
  border-radius: 20px;
  color: var(--night-ink);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  min-height: 310px;
  padding: 1.25rem;
  position: relative;
  text-align: left;
  transition: background 160ms ease, transform 160ms ease;
}

.event-card:hover,
.event-card:focus-within {
  background: color-mix(in srgb, var(--night-ink) 12%, transparent);
  transform: translateY(-3px);
}

.event-card.is-china {
  border-color: color-mix(in srgb, var(--spark) 55%, transparent);
}

.event-card.is-china::after {
  background: var(--spark);
  color: #1c1608;
  content: "CHINA";
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.55rem;
  position: absolute;
  right: 0;
  top: 0;
  pointer-events: none;
  z-index: 2;
}

.event-card-top {
  align-items: start;
  display: flex;
  justify-content: space-between;
}

.event-date {
  color: var(--accent-ink);
  font-size: 1rem;
  font-weight: 850;
  letter-spacing: 0.07em;
  margin: 0;
  text-transform: uppercase;
}

.explorer-section .event-date {
  color: var(--spark);
}

.event-region {
  color: color-mix(in srgb, var(--night-ink) 58%, transparent);
  font-size: 1rem;
  margin-left: 1rem;
  text-align: right;
}

.event-card h3 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2vw, 1.85rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 1rem 0 0.8rem;
}

.event-card > p {
  color: color-mix(in srgb, var(--night-ink) 68%, transparent);
  display: -webkit-box;
  font-size: 1rem;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  margin: 0;
  overflow: hidden;
}

.event-card-bottom {
  align-items: end;
  border-top: 1px solid color-mix(in srgb, var(--night-ink) 14%, transparent);
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 0.9rem;
}

.event-card-bottom span {
  color: color-mix(in srgb, var(--night-ink) 62%, transparent);
  font-size: 1rem;
}

.event-card-bottom b {
  color: var(--spark);
  font-size: 1.2rem;
}

.event-card-hit {
  background: transparent;
  border: 0;
  border-radius: inherit;
  cursor: pointer;
  inset: 0;
  padding: 0;
  position: absolute;
  z-index: 1;
}

.event-card-hit:focus-visible {
  outline: 3px solid var(--spark);
  outline-offset: 3px;
}

.event-grid.is-compact {
  display: block;
}

.event-grid.is-compact .event-card {
  align-items: center;
  border-radius: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: 150px minmax(220px, 0.65fr) 1fr 170px;
  min-height: 0;
  padding: 1rem;
}

.event-grid.is-compact .event-card + .event-card {
  border-top: 0;
}

.event-grid.is-compact .event-card-top {
  display: block;
}

.event-grid.is-compact .event-region {
  display: block;
  margin: 0.2rem 0 0;
  text-align: left;
}

.event-grid.is-compact .event-card h3,
.event-grid.is-compact .event-card > p,
.event-grid.is-compact .event-card-bottom {
  margin: 0;
}

.event-grid.is-compact .event-card-bottom {
  border-top: 0;
  padding-top: 0;
}

.load-more {
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--night-ink) 35%, transparent);
  border-radius: 999px;
  color: var(--night-ink);
  cursor: pointer;
  display: block;
  font-weight: 780;
  margin: 2rem auto 0;
  min-height: 52px;
  padding: 0.75rem 1.5rem;
}

.empty-state {
  border: 1px dashed color-mix(in srgb, var(--night-ink) 35%, transparent);
  border-radius: var(--radius);
  padding: 3rem;
  text-align: center;
}

.empty-state strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.8rem;
}

.empty-state p {
  color: color-mix(in srgb, var(--night-ink) 65%, transparent);
}

.china-section {
  background:
    linear-gradient(115deg, color-mix(in srgb, var(--accent) 92%, #3b1209), color-mix(in srgb, var(--accent-ink) 86%, #180b08)),
    var(--accent);
  color: #fff8e7;
  overflow: hidden;
  padding: clamp(5rem, 10vw, 10rem) 0;
  position: relative;
}

.china-section::before,
.china-section::after {
  border: 1px solid rgba(255, 248, 231, 0.18);
  border-radius: 50%;
  content: "";
  height: 36rem;
  position: absolute;
  right: -18rem;
  top: -15rem;
  width: 36rem;
}

.china-section::after {
  height: 27rem;
  left: -14rem;
  right: auto;
  top: auto;
  width: 27rem;
  bottom: -14rem;
}

.china-intro {
  align-items: end;
  display: grid;
  gap: 4rem;
  grid-template-columns: 1.25fr 0.75fr;
  position: relative;
  z-index: 1;
}

.china-intro .section-kicker {
  color: var(--spark);
}

.china-intro > p {
  color: rgba(255, 248, 231, 0.75);
  margin: 0;
}

.china-spine {
  display: grid;
  gap: 0;
  grid-template-columns: repeat(6, 1fr);
  margin-top: 4rem;
  position: relative;
  z-index: 1;
}

.china-spine::before {
  background: rgba(255, 248, 231, 0.38);
  content: "";
  height: 1px;
  left: 4rem;
  position: absolute;
  right: 4rem;
  top: 11px;
}

.china-stop {
  background: transparent;
  border: 0;
  color: inherit;
  cursor: pointer;
  min-height: 190px;
  padding: 0 0.8rem;
  position: relative;
  text-align: left;
}

.china-stop::before {
  background: var(--spark);
  border: 4px solid color-mix(in srgb, var(--accent) 88%, #3b1209);
  border-radius: 2px;
  content: "";
  display: block;
  height: 16px;
  margin: 2px 0 1.2rem;
  position: relative;
  transform: rotate(45deg);
  width: 16px;
  z-index: 2;
}

.china-stop span,
.china-stop small {
  display: block;
}

.china-stop span {
  color: var(--spark);
  font-size: 1rem;
  font-weight: 850;
  letter-spacing: 0.06em;
}

.china-stop strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.2;
  margin: 0.35rem 0;
}

.china-stop small {
  color: rgba(255, 248, 231, 0.68);
  font-size: 1rem;
  line-height: 1.35;
}

.story-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.story-tabs button[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.story-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 420px;
  padding: clamp(1.3rem, 4vw, 3rem);
}

.story-panel > h3 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.7rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 0;
}

.story-panel > p {
  color: var(--muted);
  max-width: 760px;
}

.story-route {
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 2rem;
}

.story-step {
  background: color-mix(in srgb, var(--surface) 74%, var(--paper-deep));
  border: 1px solid var(--line);
  border-radius: 16px;
  cursor: pointer;
  min-height: 180px;
  padding: 1rem;
  text-align: left;
}

.story-step:hover {
  border-color: var(--accent);
}

.story-step span,
.story-step small {
  color: var(--muted);
  display: block;
  font-size: 1rem;
}

.story-step strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.2;
  margin: 1rem 0 0.5rem;
}

.classroom-section {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--accent-two) 92%, #0c2628), color-mix(in srgb, var(--accent-two) 70%, var(--night)));
  color: #f6fffd;
  padding: clamp(5rem, 9vw, 8rem) 0;
}

.classroom-grid {
  align-items: center;
  display: grid;
  gap: clamp(3rem, 7vw, 7rem);
  grid-template-columns: 1fr 0.85fr;
}

.classroom-copy .section-kicker {
  color: var(--spark);
}

.classroom-copy > p,
.classroom-copy li {
  color: rgba(246, 255, 253, 0.72);
}

.classroom-copy ul {
  border-top: 1px solid rgba(246, 255, 253, 0.2);
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}

.classroom-copy li {
  border-bottom: 1px solid rgba(246, 255, 253, 0.2);
  padding: 0.8rem 0;
}

.quiz-card {
  background: #f7f1df;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: #1d1930;
  min-height: 440px;
  padding: clamp(1.3rem, 3vw, 2.2rem);
}

.quiz-top {
  color: #655f64;
  display: flex;
  font-size: 1rem;
  font-weight: 800;
  justify-content: space-between;
  text-transform: uppercase;
}

#quizPrompt {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  line-height: 1.1;
  margin: 2rem 0;
}

.quiz-options {
  display: grid;
  gap: 0.7rem;
}

.quiz-options button {
  background: #fffaf0;
  border: 1px solid rgba(29, 25, 48, 0.25);
  border-radius: 13px;
  color: #1d1930;
  cursor: pointer;
  font-weight: 720;
  min-height: 55px;
  padding: 0.75rem 1rem;
  text-align: left;
}

.quiz-options button:hover {
  border-color: var(--accent);
}

.quiz-options button.is-correct {
  background: #dceeb4;
  border-color: #3a702a;
}

.quiz-options button.is-wrong {
  background: #f5cbc2;
  border-color: #9e3525;
}

.quiz-options button:disabled {
  cursor: default;
}

.quiz-feedback {
  color: #554d54;
  min-height: 3.2em;
}

.quiz-card .primary-action {
  color: #f7f1df;
}

.method-section {
  display: grid;
  gap: 3rem;
  grid-template-columns: 0.75fr 1.25fr;
}

.method-grid {
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(2, 1fr);
}

.method-grid article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.2rem;
}

.method-grid article > span {
  color: var(--accent);
  font-weight: 850;
}

.method-grid h3 {
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 500;
  margin: 0.8rem 0 0.4rem;
}

.method-grid p {
  color: var(--muted);
  font-size: 1rem;
  margin: 0;
}

.source-drawer,
.review-note,
.visual-credit {
  grid-column: 1 / -1;
}

.source-drawer {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.source-drawer summary {
  cursor: pointer;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 500;
  list-style: none;
  padding: 1.2rem 0;
}

.source-drawer summary::-webkit-details-marker {
  display: none;
}

.source-drawer summary span {
  color: var(--accent);
  float: right;
}

.source-drawer[open] summary span {
  transform: rotate(45deg);
}

#sourceList {
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(3, 1fr);
  padding: 0 0 1.5rem;
}

.source-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  display: grid;
  min-height: 110px;
  padding: 1rem;
  text-decoration: none;
}

.source-item strong {
  line-height: 1.25;
}

.source-item span {
  color: var(--muted);
  font-size: 1rem;
  margin-top: auto;
}

.review-note {
  color: var(--muted);
  font-size: 1rem;
  margin: 0;
}

.visual-credit {
  background: color-mix(in srgb, var(--accent) 7%, var(--surface));
  border-left: 4px solid var(--accent);
  color: var(--muted);
  margin: 0;
  padding: 0.9rem 1rem;
}

.visual-credit a {
  font-weight: 760;
  white-space: nowrap;
}

.site-footer {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 3rem;
  grid-template-columns: 1fr 1fr 1fr;
  padding-bottom: 4rem;
  padding-top: 3rem;
}

.site-footer p,
.site-footer nav span {
  color: var(--muted);
  font-size: 1rem;
}

.site-footer nav {
  display: grid;
  gap: 0.35rem;
}

.site-footer nav a {
  font-weight: 740;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

dialog {
  color: var(--ink);
}

.event-dialog,
.guide-dialog {
  background: var(--surface-strong);
  border: 1px solid var(--line-strong);
  border-radius: 24px;
  box-shadow: 0 32px 100px rgba(0, 0, 0, 0.32);
  max-height: min(880px, calc(100vh - 2rem));
  max-width: 760px;
  padding: 0;
  width: calc(100% - 2rem);
}

.event-dialog::backdrop,
.guide-dialog::backdrop {
  backdrop-filter: blur(7px);
  background: rgba(8, 10, 16, 0.64);
}

.dialog-bar {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  padding: 0.8rem 1.1rem;
}

.dialog-bar > span {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 820;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dialog-bar button {
  align-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  font-size: 1.45rem;
  height: 44px;
  justify-content: center;
  line-height: 1;
  width: 44px;
}

.dialog-content {
  overflow-y: auto;
  padding: clamp(1.3rem, 4vw, 3rem);
}

.dialog-content h2 {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1;
  margin: 0.5rem 0 0.7rem;
}

.dialog-context {
  color: var(--muted);
  font-size: 1rem;
  margin: 0 0 1.5rem;
}

.dialog-summary {
  font-size: 1.03rem;
}

.significance-block {
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  border-left: 4px solid var(--accent);
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
}

.significance-block span {
  color: var(--accent-ink);
  font-size: 1rem;
  font-weight: 850;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.significance-block p {
  margin: 0.3rem 0 0;
}

.dialog-themes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.record-panel {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  margin-top: 1.2rem;
  padding: 0.2rem 0 0.9rem;
}

.record-panel summary {
  color: var(--accent-ink);
  cursor: pointer;
  font-weight: 820;
  padding: 0.9rem 0;
}

.record-panel dl {
  display: grid;
  gap: 0.45rem 1rem;
  grid-template-columns: minmax(9rem, 0.45fr) minmax(0, 1fr);
  margin: 0;
}

.record-panel dt {
  color: var(--muted);
  font-weight: 760;
}

.record-panel dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.record-panel > p {
  color: var(--muted);
  margin: 0.8rem 0 0;
}

.theme-pill {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted);
  font-size: 1rem;
  padding: 0.3rem 0.6rem;
}

.source-link {
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  font-weight: 790;
  margin: 1.5rem 0;
  padding-bottom: 0.25rem;
  text-decoration: none;
}

.related-events {
  border-top: 1px solid var(--line);
  margin-top: 1rem;
  padding-top: 1rem;
}

.related-events h3 {
  font-size: 1rem;
  margin: 0 0 0.8rem;
}

#relatedEvents {
  display: grid;
  gap: 0.5rem;
}

#relatedEvents button {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  padding: 0.7rem;
  text-align: left;
}

#relatedEvents button span {
  color: var(--muted);
  display: block;
  font-size: 1rem;
}

.guide-steps {
  display: grid;
  gap: 0.8rem;
  padding-left: 1.3rem;
}

.toast {
  background: var(--ink);
  border-radius: 999px;
  bottom: 1rem;
  color: var(--paper);
  font-size: 1rem;
  left: 50%;
  opacity: 0;
  padding: 0.75rem 1.1rem;
  pointer-events: none;
  position: fixed;
  transform: translate(-50%, 20px);
  transition: opacity 160ms ease, transform 160ms ease;
  z-index: 300;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1120px) {
  body {
    font-size: 17px;
  }

  .masthead {
    grid-template-columns: 1fr auto;
  }

  .masthead nav {
    display: none;
  }

  .hero {
    gap: 3rem;
    grid-template-columns: 1fr 0.8fr;
  }

  .filter-dock {
    grid-template-columns: minmax(260px, 1.5fr) repeat(2, minmax(145px, 0.75fr));
    position: static;
  }

  .filter-dock .toggle-control,
  .filter-dock > .quiet-button {
    align-self: end;
  }

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

  .china-spine {
    grid-template-columns: repeat(3, 1fr);
    row-gap: 2rem;
  }

  .china-spine::before {
    display: none;
  }

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

  .event-grid.is-compact .event-card {
    grid-template-columns: 120px minmax(220px, 0.8fr) 1fr;
  }

  .event-grid.is-compact .event-card-bottom {
    display: none;
  }
}

@media (max-width: 800px) {
  html {
    scroll-padding-top: 72px;
  }

  body {
    font-size: 17px;
  }

  .masthead {
    min-height: 72px;
  }

  .masthead > .quiet-button {
  font-size: 1rem;
    min-height: 42px;
    padding: 0.55rem 0.75rem;
  }

  .hero {
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding-bottom: 4rem;
    padding-top: 4rem;
  }

  .hero h1 {
    font-size: clamp(3.8rem, 16vw, 6.5rem);
  }

  .hero-graphic {
    min-height: 0;
    width: min(100%, 560px);
  }

  .orientation {
    grid-template-columns: 1fr;
  }

  .legend {
    border-left: 0;
    border-top: 1px solid color-mix(in srgb, var(--night-ink) 20%, transparent);
    padding-left: 0;
    padding-top: 1.2rem;
  }

  .section-heading,
  .china-intro {
    align-items: start;
    flex-direction: column;
    gap: 1rem;
  }

  .section-heading {
    display: flex;
  }

  .section-heading > p {
    text-align: left;
  }

  .compare-toolbar {
    grid-template-columns: 1fr 1fr;
  }

  .swap-button {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .compare-toolbar > .quiet-button {
    grid-column: 1 / -1;
  }

  .range-panel {
    grid-template-columns: 1fr;
  }

  .range-presets {
    grid-column: 1;
  }

  .mobile-scroll-hint {
    display: block;
  }

  .compare-stage {
    border: 1px solid var(--line);
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-color: var(--accent) transparent;
  }

  .compare-axis {
    border-left: 0;
    border-right: 0;
    display: grid;
    min-width: 880px;
    padding-left: 160px;
  }

  .compare-lanes {
    border: 0;
    border-radius: 0;
    min-width: 880px;
    overflow: visible;
  }

  .compare-lane {
    grid-template-columns: 160px 1fr;
  }

  .lane-label {
    border-bottom: 0;
    border-right: 1px solid var(--line);
    left: 0;
    padding: 1.1rem;
    position: sticky;
    z-index: 4;
  }

  .compare-summary {
    grid-template-columns: 1fr;
  }

  .compare-summary article:first-child,
  .compare-summary article:last-child {
    border-radius: 0;
  }

  .explorer-intro,
  .china-intro,
  .classroom-grid,
  .method-section {
    grid-template-columns: 1fr;
  }

  .filter-dock {
    grid-template-columns: repeat(2, 1fr);
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  .search-control {
    grid-column: 1 / -1;
  }

  .event-grid {
    grid-template-columns: 1fr;
  }

  .event-card {
    min-height: 280px;
  }

  .event-grid.is-compact .event-card {
    display: flex;
  }

  .event-grid.is-compact .event-card > p,
  .event-grid.is-compact .event-card-bottom {
    display: flex;
  }

  .china-intro {
    display: grid;
    gap: 1.2rem;
  }

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

  .story-route,
  .method-grid,
  #sourceList,
  .site-footer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .masthead {
    padding-inline: 0.85rem;
  }

  .wordmark {
  font-size: 1rem;
  }

  .wordmark-mark {
    transform: scale(0.82) skew(-8deg);
    transform-origin: left center;
    width: 25px;
  }

  .masthead > .quiet-button {
    max-width: 126px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .primary-action,
  .hero-actions .text-action {
    text-align: center;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-stats div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
  }

  .compare-toolbar,
  .filter-dock {
    grid-template-columns: 1fr;
  }

  .swap-button,
  .compare-toolbar > .quiet-button,
  .search-control {
    grid-column: 1;
  }

  .filter-dock .quiet-button {
    width: 100%;
  }

  .results-head {
    align-items: start;
    flex-direction: column;
    gap: 0.8rem;
  }

  .china-spine {
    grid-template-columns: 1fr;
  }

  .china-stop {
    min-height: 0;
    padding-bottom: 1.5rem;
  }

  .story-tabs {
    display: grid;
  }

  .story-tabs button {
    border-radius: 12px;
    text-align: left;
  }

  .source-drawer summary {
    font-size: 1.15rem;
  }

  .record-panel dl {
    gap: 0.2rem;
    grid-template-columns: 1fr;
  }

  .record-panel dd {
    margin-bottom: 0.7rem;
  }

  .event-dialog,
  .guide-dialog {
    border-radius: 18px;
    max-height: calc(100vh - 0.75rem);
    width: calc(100% - 0.75rem);
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (forced-colors: active) {
  .wordmark-mark i,
  .lane-event::before,
  .china-stop::before,
  .density-bar i,
  .toggle-track::after {
    forced-color-adjust: none;
  }

  .event-card,
  .story-step,
  .source-item {
    border: 2px solid CanvasText;
  }
}

@media print {
  .masthead,
  .hero-graphic,
  .filter-dock,
  .quiz-card,
  .load-more,
  dialog,
  .toast {
    display: none !important;
  }

  body,
  .explorer-section,
  .china-section,
  .classroom-section {
    background: white !important;
    color: black !important;
  }

  .event-grid {
    display: block;
  }

  .event-card {
    break-inside: avoid;
    color: black;
    margin-bottom: 0.5rem;
    min-height: 0;
  }
}