* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--cp-bg);
  color: var(--cp-text);
  font-family: "Segoe UI", Aptos, Calibri, -apple-system, BlinkMacSystemFont, sans-serif;
}

button,
input {
  font: inherit;
}

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

.overview-shell {
  position: relative;
  display: flex;
  flex-direction: column;
  width: min(1180px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 72px 0 48px;
}

.overview-nav {
  position: absolute;
  top: 28px;
  right: 0;
  display: flex;
  justify-content: flex-end;
  font-size: 0.825rem;
}

.overview-nav a {
  color: var(--cp-text-muted);
  text-decoration: none;
}

.overview-nav a:hover {
  color: var(--cp-accent);
}

.overview-hero {
  max-width: 780px;
  margin-bottom: 64px;
}

.eyebrow,
.section-number {
  color: var(--cp-accent);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.875rem;
}

.section-number {
  font-size: 0.8rem;
}

h1,
h2,
.rhyme-name,
.small-rhyme-character {
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 9vw, 5.5rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1;
}

h1::selection {
  background: transparent;
  color: var(--cp-accent);
}

.overview-hero > p:last-child {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--cp-text-muted);
  font-size: 1.1rem;
  line-height: 1.8;
}

.overview-status {
  min-height: 32px;
  color: var(--cp-text-muted);
}

.overview-status.error {
  color: var(--cp-danger);
}

.overview-toc {
  --toc-position: 8.333%;
  display: none;
}

.overview-toc-list {
  position: relative;
}

.overview-toc ol {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.overview-toc a {
  display: grid;
  gap: 2px;
  padding: 7px 10px;
  color: var(--cp-text-muted);
  font-size: 0.75rem;
  line-height: 1.3;
  opacity: 0.4;
  text-decoration: none;
  transform: translateX(0);
  transition:
    color 180ms ease,
    opacity 180ms ease,
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.overview-toc a span {
  color: var(--cp-accent);
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: 0.675rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.overview-toc a.is-past {
  opacity: 0.55;
}

.overview-toc a.is-adjacent {
  opacity: 0.68;
}

.overview-toc a:hover {
  color: var(--cp-text);
  opacity: 0.85;
}

.overview-toc a[aria-current="location"] {
  color: var(--cp-text);
  opacity: 1;
  transform: translateX(4px);
}

.overview-section {
  padding: 72px 0;
  border-top: 1px solid var(--cp-border);
}

.section-heading,
.section-heading-copy {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.section-heading {
  margin-bottom: 32px;
}

.section-number {
  min-width: 28px;
  margin: 7px 0 0;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
}

.section-heading p:last-child {
  margin: 8px 0 0;
  color: var(--cp-text-muted);
  line-height: 1.7;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.metric-card {
  padding: 24px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-surface);
}

.metric-value {
  display: block;
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 700;
}

.metric-label {
  display: block;
  margin-top: 8px;
  color: var(--cp-text-muted);
}

.volume-ribbons {
  display: grid;
  gap: 20px;
}

.volume-ribbon {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 160px;
  gap: 16px;
  align-items: center;
}

.volume-title {
  font-weight: 700;
}

.volume-summary {
  color: var(--cp-text-muted);
  font-size: 0.8rem;
  text-align: right;
}

.ribbon-track {
  display: flex;
  min-width: 0;
  height: 44px;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface-soft);
}

.ribbon-rhyme {
  flex-basis: 0;
  min-width: 3px;
  padding: 0;
  border: 0;
  border-radius: 4px;
  background: var(--cp-accent-soft);
  color: var(--cp-text);
  cursor: pointer;
  overflow: hidden;
}

.ribbon-rhyme:hover,
.ribbon-rhyme:focus {
  background: var(--cp-highlight);
  outline: 1px solid var(--cp-accent);
}

.ribbon-rhyme span {
  display: none;
}

.rhyme-map {
  --rhyme-cube-size: 112px;
  display: grid;
  grid-template-columns: repeat(auto-fill, var(--rhyme-cube-size));
  gap: 6px;
  justify-content: center;
}

.rhyme-map-scroll {
  overflow-x: auto;
}

.rhyme-map.is-tone-layout {
  min-width: calc((var(--rhyme-cube-size) * 4) + 18px);
  grid-template-columns: repeat(4, var(--rhyme-cube-size));
  grid-template-rows: 48px;
  grid-auto-rows: var(--rhyme-cube-size);
}

.rhyme-map-heading {
  justify-content: space-between;
}

.rhyme-layout-note {
  margin: 14px 0 0;
  color: var(--cp-text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.rhyme-tile {
  position: relative;
  display: flex;
  width: var(--rhyme-cube-size);
  height: var(--rhyme-cube-size);
  flex-direction: column;
  padding: 12px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface);
  color: var(--cp-text);
  cursor: pointer;
  overflow: hidden;
  text-align: left;
}

.rhyme-tile:hover,
.rhyme-tile:focus {
  border-color: var(--cp-accent);
  outline: none;
}

.rhyme-density {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: var(--density);
  background: var(--cp-accent-soft);
  pointer-events: none;
}

.rhyme-name,
.rhyme-stats {
  position: relative;
}

.rhyme-name {
  display: block;
  font-size: 1.75rem;
  line-height: 1;
}

.rhyme-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--cp-border);
}

.rhyme-stat {
  min-width: 0;
}

.rhyme-stat strong {
  display: block;
  overflow: hidden;
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: 0.9rem;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rhyme-stat small {
  display: block;
  margin-top: 4px;
  color: var(--cp-text-muted);
  font-size: 0.65rem;
  line-height: 1;
}

.tone-layout-label,
.tone-layout-placeholder {
  display: none;
}

.rhyme-map.is-tone-layout .tone-layout-label,
.rhyme-map.is-tone-layout .tone-layout-placeholder {
  display: grid;
}

.tone-layout-label {
  align-content: end;
  justify-items: center;
  padding: 0 12px 8px;
  color: var(--cp-text-muted);
  text-align: center;
}

.tone-layout-label strong {
  color: var(--cp-text);
  font-size: 0.85rem;
  font-weight: 700;
}

.tone-layout-label span {
  margin-top: 4px;
  font-size: 0.7rem;
  font-weight: 500;
}

.tone-layout-placeholder {
  width: var(--rhyme-cube-size);
  height: var(--rhyme-cube-size);
  place-items: center;
  padding: 12px;
  color: var(--cp-text-soft);
  opacity: 0;
  text-align: center;
}

.rhyme-map.is-tone-layout .tone-layout-placeholder {
  animation: tone-placeholder-in 360ms ease 620ms both;
}

.tone-layout-placeholder.is-merged {
  color: var(--cp-text-muted);
}

.tone-layout-placeholder span {
  display: block;
  font-size: 0.78rem;
  line-height: 1.6;
}

@keyframes tone-placeholder-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.hierarchy-search {
  margin-bottom: 16px;
  padding: 16px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-bg-elevated);
}

.hierarchy-search > label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.82rem;
  font-weight: 700;
}

.hierarchy-search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.hierarchy-search input {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  outline: none;
  background: var(--cp-surface);
  color: var(--cp-text);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.hierarchy-search input:focus {
  border-color: var(--cp-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--cp-accent) 15%, transparent);
}

.hierarchy-search > .hierarchy-search-row > button {
  min-width: 72px;
  padding: 10px 14px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface);
  color: var(--cp-text);
  cursor: pointer;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.hierarchy-search > .hierarchy-search-row > button:hover {
  border-color: var(--cp-accent);
  color: var(--cp-accent);
  transform: translateY(-1px);
}

.hierarchy-search-status {
  min-height: 1.2em;
  margin: 8px 0 0;
  color: var(--cp-text-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.hierarchy-search-results {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.hierarchy-search-results[hidden] {
  display: none;
}

.hierarchy-search-group {
  min-width: 0;
}

.hierarchy-search-group h3 {
  margin: 0 0 6px;
  color: var(--cp-text-muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.hierarchy-search-group-list {
  display: grid;
  gap: 5px;
}

.hierarchy-search-result {
  display: block;
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface);
  color: var(--cp-text);
  cursor: pointer;
  text-align: left;
}

.hierarchy-search-result:hover,
.hierarchy-search-result:focus-visible {
  border-color: var(--cp-accent);
  outline: none;
}

.hierarchy-search-result strong,
.hierarchy-search-result small {
  display: block;
}

.hierarchy-search-result strong {
  font-size: 0.88rem;
}

.hierarchy-search-result small {
  margin-top: 3px;
  overflow: hidden;
  color: var(--cp-text-muted);
  font-size: 0.68rem;
  line-height: 1.45;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hierarchy-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.8fr);
  gap: 16px;
}

.hierarchy-browser {
  display: grid;
  grid-template-columns: 0.8fr 1fr 1.2fr;
  min-height: 480px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-surface);
  overflow: hidden;
}

.hierarchy-column {
  min-width: 0;
  padding: 16px;
  border-right: 1px solid var(--cp-border);
}

.hierarchy-column:last-child {
  border-right: 0;
}

.hierarchy-column h3,
.profile-card h3 {
  margin: 0 0 12px;
  font-size: 0.9rem;
}

.choice-list {
  display: grid;
  gap: 4px;
  max-height: 430px;
  overflow: auto;
}

.choice-button {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 9px 10px;
  border: 0;
  border-radius: 0.625rem;
  background: transparent;
  color: var(--cp-text);
  cursor: pointer;
  text-align: left;
}

.choice-button:hover,
.choice-button.is-active {
  background: var(--cp-accent-soft);
  color: var(--cp-accent);
}

.choice-meta {
  color: var(--cp-text-muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

.detail-panel {
  min-height: 240px;
  padding: 24px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-surface);
}

.placeholder {
  margin: 0;
  color: var(--cp-text-muted);
  line-height: 1.7;
}

.detail-panel h3 {
  margin: 0;
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 2.4rem;
}

.hierarchy-selection-heading h3 {
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.4;
  white-space: nowrap;
}

.inline-character-entry h4 {
  margin: 0 0 12px;
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 2rem;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.detail-tag {
  padding: 4px 8px;
  border-radius: 0.625rem;
  background: var(--cp-accent-soft);
  color: var(--cp-accent);
  font-size: 0.75rem;
  font-weight: 700;
}

.character-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.character-cloud button {
  display: grid;
  min-width: 40px;
  min-height: 40px;
  place-items: center;
  padding: 6px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface);
  color: var(--cp-text);
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 1.25rem;
  cursor: pointer;
}

.character-cloud button:hover,
.character-cloud button.is-active {
  border-color: var(--cp-accent);
  background: var(--cp-accent-soft);
  color: var(--cp-accent);
}

.hierarchy-character-detail {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--cp-border);
}

.hierarchy-character-detail[hidden] {
  display: none;
}

.inline-character-entry {
  padding: 12px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-bg-elevated);
}

.inline-entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.inline-entry-definition {
  margin: 0;
  line-height: 1.75;
}

.inline-entry-original {
  margin: 8px 0 0;
  color: var(--cp-text-muted);
  font-size: 0.78rem;
}

.mode-switch {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface-soft);
}

.mode-switch button {
  padding: 7px 12px;
  border: 0;
  border-radius: 0.625rem;
  background: transparent;
  color: var(--cp-text-muted);
  cursor: pointer;
}

.mode-switch button.is-active {
  background: var(--cp-surface);
  color: var(--cp-accent);
  font-weight: 700;
}

.network-toolbar {
  display: grid;
  grid-template-columns: minmax(220px, 1.1fr) minmax(220px, 1fr) auto;
  gap: 18px;
  align-items: end;
  margin-bottom: 14px;
  padding: 16px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-bg-elevated);
}

.network-search label,
.network-frequency > span {
  display: block;
  margin-bottom: 7px;
  color: var(--cp-text-muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.network-search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px;
}

.network-search input {
  min-width: 0;
  padding: 9px 11px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface);
  color: var(--cp-text);
  outline: none;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.network-search input:focus {
  border-color: var(--cp-network-lower);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--cp-network-lower) 15%, transparent);
}

.network-search button,
.network-view-actions button,
.network-focus-controls > button,
.network-touch-inspector button {
  padding: 9px 12px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface);
  color: var(--cp-text);
  cursor: pointer;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.network-search button:hover,
.network-view-actions button:hover,
.network-focus-controls > button:hover,
.network-touch-inspector button:hover {
  border-color: var(--cp-accent);
  color: var(--cp-accent);
  transform: translateY(-1px);
}

.network-search-status {
  margin: 8px 0 0;
  color: var(--cp-text-muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.network-search-candidates {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.network-search-candidates[hidden] {
  display: none;
}

.network-search-candidates button {
  padding: 5px 9px;
  border-color: var(--cp-network-upper);
  color: var(--cp-text);
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 1rem;
}

.network-frequency {
  position: relative;
}

.network-frequency strong {
  position: absolute;
  top: 0;
  right: 0;
  color: var(--cp-text);
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: 0.8rem;
}

.network-frequency input {
  width: 100%;
  height: 34px;
  margin: 0;
  accent-color: var(--cp-accent);
  cursor: pointer;
}

.network-view-actions {
  display: flex;
  gap: 6px;
}

.network-context {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
  margin-bottom: 14px;
}

.network-summary {
  flex: 1 1 360px;
  margin: 0;
  color: var(--cp-text-muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.network-legend,
.network-focus-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.network-legend {
  color: var(--cp-text-muted);
  font-size: 0.75rem;
}

.network-legend span {
  display: inline-flex;
  gap: 5px;
  align-items: center;
}

.network-legend i {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.network-legend .is-upper {
  border: 2px solid var(--cp-network-upper);
  background: var(--cp-surface);
}

.network-legend .is-lower {
  background: var(--cp-network-lower);
}

.network-legend .is-both {
  border: 2px solid var(--cp-network-upper);
  background: var(--cp-network-lower);
}

.network-focus-controls {
  flex: 1 0 100%;
  padding: 10px 12px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-bg-elevated);
}

.network-focus-controls[hidden] {
  display: none;
}

.network-focus-controls > span {
  margin-right: auto;
  color: var(--cp-text);
  font-size: 0.82rem;
  font-weight: 700;
}

.network-stage {
  position: relative;
  min-width: 0;
  height: 600px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background:
    radial-gradient(circle at 50% 42%, var(--cp-bg-elevated), transparent 62%),
    var(--cp-surface);
  overflow: hidden;
}

#fanqie-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  outline: none;
  touch-action: none;
}

#fanqie-canvas.is-dragging {
  cursor: grabbing;
}

#fanqie-canvas:focus-visible {
  box-shadow: inset 0 0 0 2px var(--cp-network-lower);
}

.network-tooltip {
  position: absolute;
  z-index: 2;
  max-width: 220px;
  padding: 8px 10px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-panel-strong);
  color: var(--cp-text);
  font-size: 0.8rem;
  pointer-events: none;
}

.network-touch-inspector {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 10px;
  padding: 12px 14px;
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  background: var(--cp-surface-soft);
}

.network-touch-inspector[hidden] {
  display: none;
}

.network-touch-inspector strong {
  margin-right: 8px;
  font-family: "Songti SC", "STSong", "Noto Serif CJK TC", serif;
  font-size: 1.2rem;
}

.network-touch-inspector span {
  color: var(--cp-text-muted);
  font-size: 0.8rem;
}

.network-touch-inspector button {
  flex: 0 0 auto;
}

.profile-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.profile-metric {
  padding: 18px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-surface-soft);
}

.profile-metric strong {
  display: block;
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: 1.5rem;
}

.profile-metric span {
  display: block;
  margin-top: 6px;
  color: var(--cp-text-muted);
  font-size: 0.8rem;
}

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

.profile-card {
  padding: 20px;
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  background: var(--cp-surface);
}

.rank-list {
  display: grid;
  gap: 10px;
}

.rank-row {
  display: grid;
  grid-template-columns: minmax(68px, auto) 1fr auto;
  gap: 10px;
  align-items: center;
}

.rank-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-track {
  height: 7px;
  border-radius: 0.625rem;
  background: var(--cp-surface-soft);
  overflow: hidden;
}

.rank-bar {
  height: 100%;
  width: var(--rank-width);
  border-radius: inherit;
  background: var(--cp-accent);
}

.rank-value {
  color: var(--cp-text-muted);
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: 0.75rem;
}

.rank-list.compact {
  grid-template-columns: repeat(2, 1fr);
}

.rank-list.compact .rank-row {
  grid-template-columns: auto 1fr auto;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--cp-border);
  color: var(--cp-text-muted);
  font-size: 0.875rem;
}

footer p {
  margin: 0;
}

@media (min-width: 1400px) {
  .overview-toc {
    display: block;
    position: fixed;
    top: 50%;
    left: max(8px, calc(50% - 700px));
    width: 100px;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    backdrop-filter: none;
    transform: translateY(-50%);
  }

  .overview-toc-list {
    padding-left: 12px;
  }

  .overview-toc ol {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(6, 42px);
    padding: 0;
  }

  .overview-toc a {
    align-content: center;
    height: 42px;
    padding: 4px 8px 4px 12px;
  }

  .overview-toc-list::before,
  .overview-toc-progress {
    position: absolute;
    top: 8.333%;
    left: 0;
    width: 2px;
    border-radius: 999px;
  }

  .overview-toc-list::before {
    bottom: 8.333%;
    background: var(--cp-border);
    content: "";
  }

  .overview-toc-progress {
    z-index: 1;
    height: calc(var(--toc-position) - 8.333%);
    background: var(--cp-accent);
  }

  .overview-toc-indicator {
    position: absolute;
    top: var(--toc-position);
    left: -3px;
    z-index: 2;
    width: 8px;
    height: 8px;
    border: 2px solid var(--cp-bg);
    border-radius: 50%;
    background: var(--cp-accent);
    box-shadow: 0 0 0 1px var(--cp-accent);
    transform: translateY(-50%);
  }
}

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

  .overview-toc a {
    transition: none;
  }
}

@media (max-width: 900px) {
  .hierarchy-search-results {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .hierarchy-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .hierarchy-search input,
  .hierarchy-search button,
  .hierarchy-search-result {
    min-height: 44px;
  }

  .hierarchy-search-results {
    grid-template-columns: 1fr;
  }

  .overview-shell {
    padding-top: 40px;
  }

  .overview-nav {
    top: 0;
  }

  .overview-section {
    padding: 52px 0;
  }

  .volume-ribbon {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .volume-summary {
    text-align: left;
  }

  .hierarchy-browser {
    grid-template-columns: 1fr;
  }

  .hierarchy-column {
    border-right: 0;
    border-bottom: 1px solid var(--cp-border);
  }

  .character-cloud button {
    min-width: 44px;
    min-height: 44px;
  }

  .choice-list {
    max-height: 240px;
  }

  .network-toolbar {
    grid-template-columns: 1fr;
    gap: 14px;
    align-items: stretch;
    padding: 12px;
  }

  .network-search input,
  .network-search button,
  .network-view-actions button,
  .network-focus-controls > button {
    min-height: 44px;
  }

  .network-frequency input {
    height: 44px;
  }

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

  .network-focus-controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: stretch;
    padding: 12px;
  }

  .network-focus-controls > span {
    grid-column: 1 / -1;
    margin-right: 0;
    line-height: 1.5;
  }

  .network-focus-controls .mode-switch {
    width: 100%;
    margin-top: 0;
  }

  .network-focus-controls .mode-switch button {
    flex: 1;
  }

  .rhyme-map-heading {
    display: block;
  }

  .mode-switch {
    width: max-content;
    margin-top: 20px;
  }

  .network-context {
    align-items: flex-start;
  }

  .network-stage {
    height: 480px;
  }

  .network-touch-inspector {
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
  }

  .network-touch-inspector button {
    width: 100%;
  }

  .network-legend {
    flex: 1 0 100%;
  }

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

  footer {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .hierarchy-search-row {
    grid-template-columns: 1fr;
  }

  .hierarchy-search > .hierarchy-search-row > button {
    width: 100%;
  }

  .metrics-grid,
  .profile-metrics {
    grid-template-columns: 1fr;
  }

  .rhyme-map {
    --rhyme-cube-size: 96px;
  }

  .rhyme-tile {
    padding: 10px;
  }

  .rhyme-name {
    font-size: 1.55rem;
  }

  .network-search-row,
  .network-focus-controls {
    grid-template-columns: 1fr;
  }

  .network-focus-controls > span {
    grid-column: 1;
  }

  .network-focus-controls > button {
    width: 100%;
  }

  .rhyme-stat strong {
    font-size: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rhyme-map.is-tone-layout .tone-layout-placeholder {
    opacity: 1;
    animation: none;
  }
}