/* 01. Design tokens */
:root {
  color-scheme: light;
  --page-bg: #f6f8fb;
  --card-bg: #ffffff;
  --text-main: #111827;
  --text-muted: #667085;
  --text-soft: #98a2b3;
  --divider: #e4e7ec;
  --divider-strong: #d0d5dd;
  --brand: #0f766e;
  --brand-strong: #0b5d56;
  --brand-soft: #e7f5f2;
  --warning: #a15c07;
  --warning-soft: #fff7e8;
  --bg: var(--page-bg);
  --panel: var(--card-bg);
  --ink: var(--text-main);
  --muted: var(--text-muted);
  --muted-2: var(--text-soft);
  --line: var(--divider);
  --line-strong: var(--divider-strong);
  --accent: var(--brand);
  --accent-strong: var(--brand-strong);
  --accent-soft: var(--brand-soft);
  --warn: var(--warning);
  --warn-soft: var(--warning-soft);
  --gold: #a15c07;
  --silver: #71717a;
  --bronze: #8a5a16;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --radius-control: 8px;
  --radius-small: 4px;
  --radius-panel: 12px;
  --radius-pill: 999px;
  --radius-thumbnail: 6px;
  --chip-height: 30px;
  --chip-icon-size: 30px;
  --chip-padding-x: 8px;
  --chip-gap: 4px;
  --filter-control-height: 38px;
  --control-compact: 36px;
  --control-default: 38px;
  --control-large: 40px;
  --rank-leading-width: 44px;
  --rank-side-width-mobile: 66px;
  --rank-side-width-tablet: 76px;
  --rank-side-width-desktop: 104px;
  --rank-columns: 48px minmax(0, 1fr) var(--rank-side-width-desktop);
  --source-thumb-width-desktop: 84px;
  --source-thumb-width-tablet: 76px;
  --source-thumb-width-mobile: 64px;
  --source-thumb-width-narrow: 72px;
  --source-thumb-width: var(--source-thumb-width-desktop);
  --shadow-soft: 0 10px 28px rgba(17, 24, 39, 0.08);
  --page-x: clamp(8px, 1.4vw, 20px);
  --active-content-max: 1240px;
  --page-max: var(--active-content-max);
  --content-gutter: var(--page-x);
  --controls-height: 48px;
  --visual-viewport-height: 100dvh;
  --visual-viewport-offset-top: 0px;
  --visual-viewport-bottom: 0px;
  --query-anchor-top: calc(var(--controls-height) + var(--space-2));
  --query-anchor-right: max(16px, var(--page-x));
}

/* 02. Base styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  max-width: 100%;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP",
    "Microsoft YaHei", sans-serif;
  line-height: 1.45;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

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

.layout {
  width: min(var(--page-max), calc(100% - (var(--page-x) * 2)));
  margin: 0 auto 40px;
}

.status[hidden] {
  display: none;
}

/* 04. Sticky controls */
.controls {
  position: sticky;
  top: 0;
  z-index: 20;
  width: calc(100% + (var(--page-x) * 2));
  margin: 0 0 var(--space-2) calc(var(--page-x) * -1);
  padding: 6px var(--content-gutter);
  border-bottom: 1px solid rgba(228, 231, 236, 0.9);
  background: rgba(245, 247, 250, 0.92);
  backdrop-filter: blur(14px);
}

.controls-inner {
  display: grid;
  grid-template-columns: auto minmax(420px, auto) minmax(420px, 1fr);
  align-items: center;
  gap: var(--space-2);
  width: min(var(--page-max), calc(100% - var(--page-x) * 2));
  margin: 0 auto;
  min-width: 0;
}

.range-mode,
.view-mode,
.query-search-form {
  min-width: 0;
}

.range-mode {
  justify-self: start;
}

.view-mode {
  justify-self: stretch;
}

.view-mode .tab {
  min-width: 0;
}

/* 05. Segmented controls */
.segmented {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
  max-width: 100%;
  min-height: var(--control-default);
  padding: 3px;
  overflow: visible;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: #eef2f6;
}

.tab {
  flex: 1 1 auto;
  min-height: 30px;
  border: 0;
  border-radius: var(--radius-control);
  padding: 0 12px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
  white-space: nowrap;
}

.tab:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.62);
}

.range-mode .tab.active,
.range-mode .tab[aria-pressed="true"] {
  background: var(--accent);
  color: #ffffff;
}

.view-mode .tab.active,
.view-mode .tab[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.query-search-form {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.query-input-shell {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 28px;
  align-items: center;
  gap: 4px;
  min-width: 0;
  min-height: var(--control-default);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  padding: 0 8px;
  background: var(--panel);
}

.query-input-shell:hover,
.query-input-shell:focus-within {
  border-color: rgba(15, 118, 110, 0.34);
}

.query-search-form.has-active-query .query-input-shell {
  border-color: rgba(15, 118, 110, 0.42);
  background: #fbfefd;
}

.query-input-shell svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.query-submit-button {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-left: -5px;
  border: 0;
  border-radius: var(--radius-control-sm);
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.query-submit-button:hover,
.query-submit-button:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}

.query-trigger-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.query-input-shell input {
  min-width: 0;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  outline: none;
}

.query-input-shell input::placeholder {
  color: var(--muted);
}

.query-search-form .clear-query-button {
  position: static;
  width: 28px;
  height: 28px;
  transform: none;
  align-self: center;
}

.query-search-form .clear-query-button[hidden] {
  display: none;
}

.query-field-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(48px, auto));
  align-items: center;
  gap: 5px;
  min-width: 0;
}

.query-field-bar[hidden] {
  display: none;
}

.query-field-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 0;
  min-height: 30px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: #ffffff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}

.query-field-toggle.is-selected,
.query-field-toggle:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.query-field-toggle input {
  width: 13px;
  height: 13px;
  margin: 0;
  accent-color: var(--accent);
}

.active-query-strip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  min-height: 30px;
  margin: 0 0 var(--space-1);
  overflow-x: auto;
  padding-right: 2px;
  scrollbar-width: none;
}

.active-query-strip::-webkit-scrollbar {
  display: none;
}

.active-query-strip[hidden] {
  display: none;
}

.active-query-chip,
.active-query-clear {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  max-width: min(260px, 72vw);
  min-height: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 0 9px;
  background: #ffffff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
}

.active-query-chip span:first-child {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.active-query-chip-close {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 12px;
  line-height: 1;
}

.active-query-clear {
  position: sticky;
  right: 0;
  border-color: transparent;
  background: linear-gradient(90deg, rgba(246, 248, 251, 0.35), var(--bg) 14px);
  color: var(--accent-strong);
  padding-left: var(--space-4);
}

/* 06. Inputs */
.field {
  min-width: 0;
}

select,
input:not([type="checkbox"]):not([type="radio"]) {
  width: 100%;
  min-height: var(--control-default);
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  padding: 0 12px;
  background: var(--panel);
  color: var(--ink);
  font-size: 14px;
}

input[type="checkbox"],
input[type="radio"] {
  flex: 0 0 auto;
  width: 16px;
  min-width: 16px;
  height: 16px;
  min-height: 16px;
  margin: 0;
  padding: 0;
  accent-color: var(--accent);
}

select {
  text-overflow: ellipsis;
}

input::placeholder {
  color: var(--muted-2);
}

svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.toolbar-button,
.toolbar-icon-button,
.icon-button,
.text-button,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--control-compact);
  border-radius: var(--radius-control);
  font-weight: 700;
  letter-spacing: 0;
}

.toolbar-button,
.toolbar-icon-button {
  min-height: var(--control-default);
}

.toolbar-button,
.toolbar-icon-button,
.secondary-button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  color: var(--muted);
}

.toolbar-button {
  gap: var(--space-2);
  padding: 0 var(--space-3);
  white-space: nowrap;
}

.toolbar-icon-button,
.icon-button {
  width: var(--control-default);
  min-width: var(--control-default);
  padding: 0;
}

.icon-button {
  border: 0;
  background: transparent;
  color: var(--muted);
}

.primary-button {
  min-height: var(--control-default);
  border: 1px solid var(--accent);
  padding: 0 14px;
  background: var(--accent);
  color: #ffffff;
}

.secondary-button {
  min-height: var(--control-default);
  padding: 0 14px;
}

.text-button {
  min-height: 36px;
  border: 0;
  padding: 0 4px;
  background: transparent;
  color: var(--accent);
}

.text-button.subtle {
  color: var(--muted);
  font-size: 12px;
}

.filter-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 19px;
  height: 19px;
  border-radius: var(--radius-pill);
  padding: 0 5px;
  background: var(--accent);
  color: #ffffff;
  font-size: 11px;
  line-height: 1;
}

.filter-count[hidden] {
  display: none;
}

.ui-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--chip-gap);
  min-width: 0;
  min-height: var(--chip-height);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 0 var(--chip-padding-x);
  background: #ffffff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.ui-chip-icon {
  min-width: var(--chip-icon-size);
  min-height: var(--chip-icon-size);
}

.ui-chip-icon {
  width: var(--chip-icon-size);
  padding: 0;
}

.ui-chip:hover,
.ui-chip:focus-visible,
.ui-chip-active,
.ui-chip[aria-expanded="true"] {
  border-color: rgba(15, 118, 110, 0.26);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.ui-chip-muted {
  background: #f8fafc;
  color: var(--muted);
}

.query-toggle:hover {
  color: var(--ink);
  background: var(--panel);
}

.query-toggle:has(input:checked) {
  border-color: rgba(15, 118, 110, 0.28);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.query-toggle:first-child:has(input:checked) {
  border-color: rgba(161, 92, 7, 0.28);
  background: var(--warn-soft);
  color: var(--warn);
}

.niche-summary,
.niche-badge {
  border-color: rgba(161, 92, 7, 0.28);
  background: var(--warn-soft);
  color: var(--warn);
}

.query-toggle:has(input:disabled) {
  opacity: 0.55;
  cursor: not-allowed;
}

/* 07. Summary metrics */
.summary {
  display: grid;
  grid-template-areas:
    "main actions"
    "note note";
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-1) var(--space-3);
  min-height: 32px;
  margin-bottom: var(--space-3);
  color: var(--muted);
  font-size: 13px;
  overflow: visible;
}

.summary-main {
  grid-area: main;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-width: 0;
  line-height: 16px;
}

.summary-title {
  flex: 0 0 auto;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  line-height: 16px;
}

.summary-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border: 0;
  border-radius: var(--radius-control);
  padding: 0 var(--space-2);
  background: transparent;
  color: var(--muted);
  font-weight: 500;
  min-width: 0;
  max-width: 100%;
  white-space: nowrap;
}

.summary-status {
  display: inline-flex;
  align-items: baseline;
  min-height: 16px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 16px;
  white-space: nowrap;
}

.summary-status[data-status-kind="stale"],
.summary-status[data-status-kind="error"],
.summary-status[data-status-kind="fallback"] {
  color: var(--warn);
}

.summary-metrics {
  min-width: 0;
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0 6px;
  overflow: visible;
  color: var(--muted);
  font-weight: 500;
  line-height: 16px;
  white-space: normal;
}

.summary-metric,
.summary-separator {
  flex: 0 1 auto;
  line-height: 16px;
}

.summary-separator {
  padding: 0 3px;
}

.summary-note {
  grid-area: note;
  min-width: 0;
  margin: -2px 0 0;
  overflow: visible;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 500;
  white-space: normal;
}

.summary-actions {
  grid-area: actions;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: 0;
}

.summary-segmented {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: rgba(255, 255, 255, 0.78);
}

.summary-action {
  min-height: var(--control-compact);
  border: 0;
  border-radius: var(--radius-control);
  padding: 0 var(--space-3);
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.summary-action:hover,
.summary-action.is-current,
.summary-action[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.status-alerts {
  display: grid;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}

.status-alerts:empty {
  display: none;
}

.status-alert {
  border: 1px solid rgba(161, 92, 7, 0.22);
  border-radius: var(--radius-control);
  padding: var(--space-2) var(--space-3);
  background: var(--warn-soft);
  color: var(--warn);
  font-size: 12.5px;
  font-weight: 600;
}

.overlay-root {
  position: fixed;
  inset: 0;
  z-index: 80;
}

.overlay-root[hidden] {
  display: none;
}

.overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.38);
}

.query-panel {
  --query-grid-gap: 8px;
  position: absolute;
  top: var(--query-anchor-top);
  right: var(--query-anchor-right);
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  width: min(540px, calc(100vw - 24px));
  max-height: min(calc(var(--visual-viewport-height) - var(--query-anchor-top) - var(--space-4)), 680px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background: var(--panel);
  color: var(--ink);
  box-shadow: 0 18px 44px rgba(17, 24, 39, 0.16);
}

.query-panel-header,
.query-panel-footer,
.query-section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.query-panel h2,
.query-section h3,
.suggestion-group h4 {
  margin: 0;
  letter-spacing: 0;
}

.query-panel h2 {
  font-size: 16px;
  font-weight: 700;
}

.query-panel-header,
.query-panel-footer {
  padding: 12px 16px;
  background: var(--panel);
}

.query-panel-header {
  min-height: 48px;
  border-bottom: 1px solid var(--line);
}

.query-search-section {
  position: relative;
  display: block;
  padding: 10px 16px 0;
}

.query-search-section input {
  min-height: 38px;
  border-width: 1px;
  padding-right: 42px;
}

.query-search-section input[type="search"] {
  -webkit-appearance: none;
  appearance: textfield;
}

.query-search-section input[type="search"]::-webkit-search-cancel-button,
.query-search-section input[type="search"]::-webkit-search-decoration,
.query-search-section input[type="search"]::-webkit-search-results-button,
.query-search-section input[type="search"]::-webkit-search-results-decoration {
  -webkit-appearance: none;
  appearance: none;
  display: none;
  width: 0;
  height: 0;
  margin: 0;
}

.query-search-section input:focus,
.query-search-section input:focus-visible {
  border-color: var(--accent);
  outline: 2px solid rgba(15, 118, 110, 0.22);
  outline-offset: 1px;
  box-shadow: none;
}

.query-search-scope-field {
  padding: 8px 16px 0;
}

.clear-query-button {
  position: absolute;
  top: calc(10px + 19px);
  right: 17px;
  transform: translateY(-50%);
}

.query-panel-body {
  display: grid;
  align-content: start;
  gap: var(--space-3);
  min-height: 0;
  overflow: auto;
  padding: 10px 16px 12px;
}

.query-discovery-panel,
.query-filter-matrix {
  display: grid;
  gap: var(--space-3);
  min-width: 0;
}

.query-filter-matrix[hidden] {
  display: none;
}

#trendFilterGroup[hidden],
#minCountFilterGroup[hidden],
#displayFilterGroup[hidden],
.query-history-section[hidden] {
  display: none !important;
}

.query-section {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
  padding-top: 0;
  border-top: 0;
}

.query-section[hidden] {
  display: none;
}

.suggestions-section {
  padding-top: 0;
  border-top: 0;
}

.query-suggestions {
  display: grid;
  gap: var(--space-2);
  max-height: 112px;
  overflow: auto;
}

.suggestion-empty {
  display: flex;
  align-items: center;
  min-height: 26px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.suggestion-group {
  display: grid;
  gap: var(--space-2);
}

.search-chip,
.suggestion-item {
  min-height: 34px;
  border: 0;
  border-radius: var(--radius-control);
  padding: 0 var(--space-3);
  background: #ffffff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  text-align: left;
}

.suggestion-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-3);
  align-items: center;
}

.suggestion-item span {
  color: var(--muted);
  font-size: 12px;
}

mark {
  border-radius: 3px;
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.query-panel-footer {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--query-grid-gap);
  border-top: 1px solid var(--line);
}

.query-panel-footer .primary-button,
.query-panel-footer .secondary-button {
  width: 100%;
  min-height: var(--control-large);
  border-radius: var(--radius-control);
  white-space: nowrap;
}

.query-preview {
  pointer-events: none;
}

.query-field {
  display: grid;
  gap: 4px;
  min-width: 0;
  align-content: start;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.query-compact-field {
  grid-template-rows: auto var(--control-default);
}

.query-field select,
.query-field input:not([type="checkbox"]):not([type="radio"]) {
  width: 100%;
  box-sizing: border-box;
  min-height: 34px;
}

.query-context-card {
  display: grid;
  align-items: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  padding: 6px 10px;
  background: #ffffff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.query-context-card {
  gap: 3px;
}

.query-history-section {
  display: grid;
  grid-column: 1 / -1;
  gap: var(--space-2);
  min-width: 0;
}

.query-history-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-2);
  align-items: center;
  min-width: 0;
}

.query-history-heading strong {
  min-width: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
}

.query-history-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--query-grid-gap);
}

.query-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--query-grid-gap);
}

.query-sort-field {
  display: grid;
  grid-column: 1 / -1;
  gap: 5px;
  min-width: 0;
}

.query-field-caption,
.query-compact-label {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.query-toggle {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px;
  align-items: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  padding: 0 8px;
  background: var(--panel);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.query-toggle input[type="checkbox"] {
  width: 15px;
  height: 15px;
  margin: 0;
}

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

.query-segmented {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(78px, 1fr));
  gap: var(--query-grid-gap);
}

.query-segmented label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: #ffffff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.query-segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.query-segmented label:has(input:checked) {
  border-color: rgba(15, 118, 110, 0.28);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.query-segmented label:has(input:focus-visible) {
  outline: 2px solid rgba(15, 118, 110, 0.24);
  outline-offset: 1px;
}

/* 08. Shared content containers */
.content-shell {
  min-width: 0;
}

.content-shell[aria-busy="true"] {
  cursor: progress;
}

.skeleton-panel {
  min-height: 536px;
}

.summary-skeleton {
  width: min(420px, 88vw);
  height: 28px;
  border-radius: var(--radius-control);
  background: #e8edf3;
}

.debug-panel {
  max-width: var(--page-max);
  margin: 0 auto 12px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow: auto;
}

.skeleton-header {
  color: transparent;
}

.skeleton-row {
  grid-template-areas: "rank content side";
  pointer-events: none;
}

.skeleton-rank,
.skeleton-lines span,
.skeleton-count {
  display: block;
  border-radius: var(--radius-pill);
  background: #e8edf3;
}

.skeleton-rank {
  grid-area: rank;
  justify-self: center;
  width: 24px;
  height: 14px;
}

.skeleton-lines {
  grid-area: content;
  display: grid;
  gap: var(--space-2);
  width: 100%;
}

.skeleton-lines span:first-child {
  width: min(420px, 82%);
  height: 15px;
}

.skeleton-lines span:last-child {
  width: min(300px, 56%);
  height: 12px;
}

.skeleton-count {
  grid-area: side;
  justify-self: end;
  width: 48px;
  height: 22px;
}

.rank-panel,
.song-index {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background: var(--panel);
}

/* 09. Ranking rows */
.rank-header,
.rank-row {
  display: grid;
  grid-template-columns: var(--rank-columns);
  column-gap: var(--space-3);
  align-items: center;
}

.rank-header {
  min-height: 32px;
  padding: 0 var(--space-3);
  border-bottom: 1px solid var(--line);
  background: #f8fafc;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.rank-header span:last-child {
  text-align: right;
}

.rank-row {
  position: relative;
  grid-template-areas:
    "rank content side"
    "sources sources sources"
    "drawer drawer drawer";
  min-height: 62px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  content-visibility: auto;
  contain-intrinsic-size: auto 62px;
  transition:
    background-color 140ms ease,
    border-color 140ms ease;
}

.rank-row:last-child,
.index-row:last-child {
  border-bottom: 0;
}

.rank-row:hover,
.index-row:hover {
  background: #f8fafc;
}

.rank-row.is-expanded,
.index-row.is-expanded {
  content-visibility: visible;
  contain-intrinsic-size: auto;
}

.rank-row::before {
  content: "";
  grid-area: rank;
  align-self: stretch;
  justify-self: start;
  width: 2px;
  min-height: 44px;
  border-radius: var(--radius-pill);
  background: transparent;
}

.rank-top-1::before {
  background: rgba(161, 92, 7, 0.7);
}

.rank-top-2::before {
  background: rgba(113, 113, 122, 0.48);
}

.rank-top-3::before {
  background: rgba(138, 90, 22, 0.48);
}

.rank-number {
  grid-area: rank;
  align-self: start;
  min-width: 0;
  padding-top: 8px;
  color: var(--muted);
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  text-align: center;
}

.rank-top-1 .rank-number {
  color: var(--gold);
}

.rank-top-2 .rank-number {
  color: var(--silver);
}

.rank-top-3 .rank-number {
  color: var(--bronze);
}

.rank-content {
  grid-area: content;
  display: grid;
  gap: var(--space-1);
  min-width: 0;
}

.vtuber-title-line {
  grid-area: title;
  display: contents;
}

.vtuber-title-line .rank-title {
  min-width: 0;
}

.vtuber-collected-badge {
  grid-area: badge;
  justify-self: start;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  min-height: 20px;
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: var(--radius-pill);
  padding: 0 7px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}

.rank-row-vtuber .rank-content {
  grid-template-columns: 44px minmax(0, 1fr);
  grid-template-areas:
    "image title"
    "image subline"
    "stats stats";
  column-gap: 10px;
  row-gap: 2px;
  align-items: center;
}

.rank-title {
  display: -webkit-box;
  margin: 0;
  overflow: hidden;
  color: var(--ink);
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.25;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.rank-row-vtuber .rank-title {
  grid-area: title;
}

.song-badge {
  display: inline-flex;
  align-items: center;
  min-height: 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  padding: 0 var(--space-2);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
  vertical-align: 1px;
  white-space: nowrap;
}

.rank-subline {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 500;
  line-height: 1.3;
  white-space: nowrap;
}

.rank-row-vtuber .rank-subline {
  grid-area: subline;
}

.vtuber-handle {
  flex: 0 1 auto;
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  text-overflow: ellipsis;
  text-decoration: none;
  white-space: nowrap;
}

.vtuber-handle:hover {
  color: var(--accent-strong);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.vtuber-card-stats {
  grid-area: stats;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.2;
  white-space: nowrap;
}

.vtuber-card-stat {
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
  min-width: 0;
  overflow: hidden;
}

.vtuber-card-stat-label {
  flex: 0 0 auto;
  color: var(--muted-2);
  font-weight: 600;
}

.vtuber-card-stat-value {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  text-overflow: ellipsis;
}

.vtuber-card-stat.is-active .vtuber-card-stat-label,
.vtuber-card-stat.is-active .vtuber-card-stat-value {
  color: var(--accent-strong);
}

.vtuber-display-image {
  grid-area: image;
  width: 44px;
  height: 44px;
  object-fit: cover;
  align-self: center;
  border: 1px solid var(--line);
  background: #f2f4f7;
}

.vtuber-display-link {
  grid-area: image;
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-self: center;
  color: inherit;
  text-decoration: none;
}

.vtuber-display-link:focus-visible {
  border-radius: 50%;
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.vtuber-display-image-avatar {
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(16, 24, 40, 0.04);
}

.vtuber-display-image-thumbnail {
  border-radius: var(--radius-thumbnail);
  border-color: rgba(102, 112, 133, 0.24);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08);
}

.vtuber-display-image-missing {
  display: inline-block;
  visibility: hidden;
}

.vtuber-title-link {
  color: inherit;
  text-decoration: none;
}

.vtuber-title-link:hover {
  color: var(--accent-strong);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.rank-meta-line {
  display: flex;
  align-items: center;
  min-width: 0;
  max-width: 100%;
}

.rank-meta-line {
  gap: var(--space-2);
  overflow: hidden;
}

.rank-subline span:not(.meta-separator):not(.inline-source-separator),
.inline-source,
.inline-source-channel {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.meta-separator {
  flex: 0 0 auto;
  color: var(--muted-2);
}

.artist-missing {
  flex: 0 0 auto;
  max-width: max-content;
  border-radius: var(--radius-control);
  padding: 1px var(--space-2);
  background: var(--warn-soft);
  color: var(--warn);
}

.inline-source {
  display: inline-flex;
  flex: 0 1 auto;
  align-items: center;
  gap: 4px;
  max-width: min(300px, 38vw);
  white-space: nowrap;
}

.inline-source-time {
  flex: 0 0 auto;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.inline-source-separator {
  flex: 0 0 auto;
  color: var(--muted-2);
}

.inline-source-channel {
  flex: 1 1 auto;
  color: var(--muted);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.inline-source a:hover,
.source-link:hover,
.video-title:hover,
.song-list a:hover {
  color: var(--accent-strong);
}

.source-inline-strip {
  grid-area: sources;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 92px;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  padding-top: 2px;
}

.rank-row.is-expanded > .source-inline-strip,
.index-row.is-expanded > .source-inline-strip,
.artist-song-group.is-expanded > .source-inline-strip {
  display: none;
}

.source-inline-preview-rail {
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
}

.source-inline-preview-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(180px, 100%), 1fr));
  align-items: center;
  gap: var(--space-1);
  width: 100%;
  min-width: 0;
}

.source-inline-tail {
  display: contents;
}

.source-inline-actions {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-1);
  width: 100%;
  min-width: 0;
}

.source-inline-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 26px;
  align-items: center;
  gap: 4px;
  width: 100%;
  max-width: 100%;
  min-height: 36px;
  border: 1px solid rgba(228, 231, 236, 0.7);
  border-radius: var(--radius-control);
  padding: 2px 3px 2px 2px;
  background: #f8fafc;
  color: var(--muted);
}

.source-inline-thumb {
  display: block;
  width: 56px;
  height: 32px;
  min-width: 0;
  overflow: hidden;
  border-radius: 6px;
  background: #e4e7ec;
  color: #ffffff;
  text-decoration: none;
}

.source-inline-thumb-image {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 100%;
  max-height: 100%;
  object-fit: cover;
  flex: 0 0 auto;
}

.source-inline-main {
  display: grid;
  grid-template-rows: auto auto;
  align-content: center;
  gap: 1px;
  min-width: 0;
  overflow: hidden;
}

.source-inline-meta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
}

.source-inline-time,
.source-inline-extra-time,
.source-inline-time-more {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-height: 18px;
  border: 0;
  border-radius: var(--radius-control);
  padding: 0;
  background: transparent;
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
  text-decoration: none;
  white-space: nowrap;
}

.source-inline-time-more {
  min-height: 18px;
  padding: 0 2px;
  background: transparent;
  color: var(--muted);
  font-size: 10.5px;
}

.source-inline-time:hover,
.source-inline-extra-time:hover {
  background: transparent;
  color: var(--accent-strong);
  text-decoration: underline;
}

.source-inline-channel {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.16;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-inline-extra-times {
  display: inline-flex;
  grid-column: 1 / -1;
  align-items: center;
  gap: 3px;
  padding: 1px 2px 0 58px;
}

.source-inline-extra-times[hidden] {
  display: none;
}

.source-inline-copy,
.source-inline-copy-all {
  flex: 0 0 26px;
  width: 26px;
  min-width: 26px;
  min-height: 26px;
  padding: 0;
  border-color: transparent;
  background: transparent;
  color: var(--muted);
}

.source-inline-strip .source-copy-icon {
  grid-area: auto;
}

.source-inline-more {
  flex: 0 0 auto;
  justify-content: center;
  min-width: 0;
  max-width: 128px;
  min-height: 28px;
  overflow: hidden;
  border-color: var(--line);
  padding-inline: 7px;
  background: #ffffff;
  color: var(--accent-strong);
  font-size: 11.8px;
  font-weight: 700;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-inline-empty {
  color: var(--muted-2);
  font-size: 12px;
  font-weight: 600;
}

.rank-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  min-height: 22px;
  padding: 0;
  overflow: hidden;
  background: transparent;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  text-align: center;
  white-space: nowrap;
}

.rank-count.is-strong {
  color: var(--muted);
}

.rank-side {
  grid-area: side;
  display: grid;
  justify-items: end;
  align-content: center;
  gap: 3px;
  min-width: 0;
}

.rank-side .rank-count {
  justify-self: end;
}

.rank-side-top {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  min-width: 0;
}

.rank-side-trend {
  display: inline-flex;
  flex: 0 0 auto;
  min-width: 0;
}

.rank-side-trend[aria-hidden="true"] {
  display: none;
}

.rank-expand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 0 0 auto;
  max-width: 100%;
  min-width: 0;
  min-height: var(--chip-height);
  padding: 0 var(--chip-padding-x);
  overflow: hidden;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-expand::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentcolor;
  border-bottom: 1.5px solid currentcolor;
  transform: translateY(-1px) rotate(45deg);
  transition: transform 140ms ease;
}

.rank-expand[aria-expanded="true"]::after {
  transform: translateY(1px) rotate(225deg);
}

.rank-expand:hover,
.is-expanded .rank-expand {
  border-color: rgba(15, 118, 110, 0.26);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

/* 10. Pagination */
.pagination-row {
  display: flex;
  grid-column: 1 / -1;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0 var(--space-1);
}

.pagination-note {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.pagination-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  justify-content: flex-end;
}

.pagination-top .pagination-controls {
  flex-wrap: nowrap;
}

.page-size-control {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: #ffffff;
}

.page-select {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: var(--chip-height);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.page-select input {
  width: 46px;
  min-height: var(--chip-height);
  box-sizing: border-box;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  padding: 0 6px;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  text-align: center;
}

.page-select-total {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.page-select-submit {
  min-width: 44px;
}

.page-jump {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
}

.page-jump-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: var(--chip-height);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.page-jump input {
  width: 52px;
  min-height: var(--chip-height);
  box-sizing: border-box;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  padding: 0 var(--space-2);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  text-align: center;
}

.page-select input[data-page-input="true"] {
  width: 46px;
  min-height: var(--chip-height);
  height: var(--chip-height);
  padding: 0 6px;
}

.page-jump input[data-page-input="true"] {
  width: 52px;
  min-height: var(--chip-height);
  height: var(--chip-height);
  padding: 0 var(--space-2);
}

.page-jump-button {
  min-width: 48px;
}

.pagination-button,
.pagination-ellipsis,
.page-size-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--chip-icon-size);
  min-height: var(--chip-height);
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  padding: 0 var(--chip-padding-x);
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
}

.pagination-ellipsis {
  border-color: transparent;
  background: transparent;
  color: var(--muted-2);
  pointer-events: none;
}

.pagination-button svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.2;
}

.page-size-button {
  min-width: 72px;
  border-color: transparent;
  padding: 0 9px;
  background: transparent;
}

.page-size-short {
  display: none;
}

.pagination-button:hover:not(:disabled),
.page-size-button:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.pagination-button.is-current {
  border-color: rgba(15, 118, 110, 0.28);
  background: var(--accent);
  color: #ffffff;
}

.page-size-button.is-current,
.page-size-button[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.pagination-button:disabled {
  cursor: default;
  opacity: 0.52;
}

.pagination-stepper,
.pagination-bottom-stepper {
  flex-wrap: nowrap;
}

.pagination-stepper {
  justify-content: center;
  gap: var(--space-1);
  width: 100%;
}

.pagination-bottom-stepper {
  justify-content: flex-end;
}

.pagination-neighbor {
  min-width: 34px;
}

.page-select-compact {
  justify-content: center;
  min-width: 0;
  max-width: none;
  border: 0;
  border-radius: 0;
  padding: 0 7px;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
}

.page-select-compact input {
  width: 38px;
}

/* 11. Source drawer */
.source-drawer {
  grid-area: drawer;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: 6px;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  margin-top: 4px;
  padding: 6px 0 0;
  border-top: 1px dashed var(--line);
}

.source-drawer[hidden] {
  display: none;
}

.artist-song-drawer {
  grid-template-columns: 1fr;
  gap: var(--space-2);
  align-items: stretch;
}

.artist-song-drawer[data-source-mode="vtuber"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: auto;
  gap: 6px;
  justify-content: start;
}

.artist-song-drawer[data-source-mode="vtuber"] .source-drawer-toolbar,
.artist-song-drawer[data-source-mode="vtuber"] .source-drawer-pagination,
.artist-song-drawer[data-source-mode="vtuber"] .source-collapse-bottom,
.artist-song-drawer[data-source-mode="vtuber"] .source-drawer-status {
  grid-column: 1 / -1;
}

.artist-song-group {
  display: grid;
  gap: var(--space-2);
  justify-self: stretch;
  width: 100%;
  min-width: 0;
  min-height: 58px;
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--line);
}

.artist-song-group:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.artist-song-header {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) minmax(116px, auto);
  grid-template-areas: "thumb title actions";
  gap: var(--space-2);
  align-items: center;
  min-width: 0;
}

.artist-song-thumb {
  grid-area: thumb;
  display: block;
  width: 72px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #edf2f7;
}

.artist-song-thumb-placeholder {
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(152, 162, 179, 0.12), rgba(228, 231, 236, 0.7));
}

.artist-song-thumb-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.artist-song-thumb-image[hidden] {
  display: none;
}

.artist-song-title-wrap {
  grid-area: title;
  display: grid;
  align-content: center;
  gap: 2px;
  min-width: 0;
}

.artist-song-title {
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.artist-song-title:hover {
  color: var(--accent-strong);
}

.artist-song-artist {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.artist-song-date {
  min-width: 0;
  overflow: hidden;
  color: var(--muted-2);
  font-size: 10.5px;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.artist-song-count {
  justify-self: end;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.artist-song-video-count {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.artist-song-summary-actions {
  grid-area: actions;
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-width: 0;
}

.artist-song-group-vtuber {
  gap: 0;
  align-content: stretch;
  min-width: 0;
  min-height: 56px;
  height: auto;
  overflow: hidden;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: #f8fafc;
}

.artist-song-group-vtuber .artist-song-header {
  grid-template-columns: 62px minmax(0, 1fr) minmax(44px, auto);
  grid-template-areas: "thumb title actions";
  grid-template-rows: auto;
  gap: 4px 8px;
  align-items: center;
  min-height: 0;
}

.artist-song-group-vtuber:last-child {
  padding: 8px;
  border: 1px solid var(--line);
}

.artist-song-group-vtuber .artist-song-title {
  overflow: hidden;
  font-size: 12px;
  line-height: 1.2;
  text-align: left;
  overflow-wrap: anywhere;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.artist-song-group-vtuber .artist-song-title-wrap {
  align-content: start;
  justify-content: stretch;
  min-width: 0;
  max-width: 100%;
  gap: 1px;
  overflow: hidden;
  text-align: left;
}

.artist-song-group-vtuber .artist-song-thumb {
  width: 62px;
  align-self: start;
}

.artist-song-group-vtuber .artist-song-artist {
  display: block;
  max-width: 100%;
  font-size: 10.5px;
  line-height: 1.2;
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.artist-song-group-vtuber .artist-song-summary-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  align-self: center;
  justify-self: end;
  overflow: hidden;
  text-align: right;
}

.artist-song-group-vtuber .artist-song-date {
  display: inline-flex;
  align-items: center;
  height: 20px;
  font-size: 10.5px;
  line-height: 1;
  white-space: nowrap;
}

.artist-song-group-vtuber .song-badge {
  display: inline-flex;
  align-items: center;
  height: 20px;
  min-height: 20px;
  padding: 0 6px;
  font-size: 10px;
  line-height: 1;
  white-space: nowrap;
}

.artist-song-group-vtuber .artist-song-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 20px;
  min-height: 20px;
  min-width: 0;
  padding: 0 4px;
  font-size: 11px;
  line-height: 1;
  white-space: nowrap;
  text-align: center;
}

.artist-song-group-vtuber button.artist-song-count {
  position: relative;
  min-width: 0;
  min-height: 20px;
  margin: 0;
  border: 0;
  border-radius: 4px;
  padding: 0 4px;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  touch-action: manipulation;
  appearance: none;
}

.artist-song-group-vtuber button.artist-song-count:hover,
.artist-song-group-vtuber button.artist-song-count:focus-visible {
  background: var(--brand-soft);
  color: var(--brand-strong);
}

.artist-song-group-vtuber button.artist-song-count:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 1px;
}

.artist-song-group-vtuber button.artist-song-count:disabled,
.artist-song-group-vtuber button.artist-song-count[aria-busy="true"] {
  cursor: default;
  opacity: 0.55;
}

.artist-song-source-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--chip-height);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 0 var(--chip-padding-x);
  background: #ffffff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.artist-song-source-toggle:hover,
.artist-song-source-toggle[aria-expanded="true"] {
  background: #f8fafc;
  color: var(--accent-strong);
}

.artist-song-sources {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.artist-song-sources[hidden] {
  display: none;
}

.source-drawer-toolbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  min-width: 0;
  padding-bottom: 2px;
}

.source-drawer-count {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-drawer-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--chip-gap);
}

.source-drawer-actions .source-collapse-top {
  min-height: var(--chip-height);
  border-color: var(--line);
  background: #ffffff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.source-drawer-actions .source-collapse-top:hover {
  background: #f8fafc;
  color: var(--accent-strong);
}

.source-drawer-actions .source-copy-all svg {
  width: 15px;
  height: 15px;
  margin-left: 4px;
  fill: none;
  stroke: currentcolor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.source-drawer-status {
  grid-column: 1 / -1;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  padding: 8px 10px;
  background: #f8fafc;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
}

.source-drawer-status-error {
  border-color: #fecaca;
  background: #fff7f7;
  color: #b42318;
}

.source-drawer-pagination {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding-top: 2px;
}

.source-page-summary {
  min-width: 0;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  text-align: center;
}

.source-page-jump {
  display: inline-grid;
  grid-template-columns: 52px auto 52px;
  align-items: center;
  gap: 4px;
}

.source-page-jump input {
  width: 52px;
  height: var(--chip-height);
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: #ffffff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.source-page-jump input[data-page-input="true"] {
  width: 52px;
  min-height: var(--chip-height);
  height: var(--chip-height);
  padding: 0 var(--space-2);
}

.source-page-total {
  min-width: 40px;
  text-align: left;
  white-space: nowrap;
}

.source-page-button {
  min-width: 52px;
  min-height: var(--chip-height);
  border-color: var(--line);
  background: #ffffff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.source-page-button:hover:not(:disabled) {
  background: #f8fafc;
  color: var(--accent-strong);
}

.source-page-button:disabled {
  opacity: 0.45;
}

.artist-song-more {
  justify-self: start;
  border: 0;
  border-radius: var(--radius-control);
  padding: 3px 0;
  background: transparent;
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 700;
}

.source-video-group {
  display: grid;
  grid-template-columns: var(--source-thumb-width) minmax(0, 1fr) var(--chip-icon-size);
  grid-template-areas: "thumb main copy";
  align-items: center;
  align-content: center;
  align-self: start;
  justify-self: stretch;
  gap: 6px;
  width: 100%;
  min-width: 0;
  min-height: 60px;
  border: 0;
  border-radius: var(--radius-control);
  padding: 6px;
  background: #f8fafc;
}

.source-video-thumb-link {
  grid-area: thumb;
  display: block;
  width: var(--source-thumb-width);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-thumbnail);
  background: #e4e7ec;
}

.source-video-thumb {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.source-video-main {
  grid-area: main;
  display: grid;
  align-content: start;
  gap: var(--space-1);
  min-width: 0;
}

.source-video-topline,
.source-video-identity {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
}

.source-video-identity {
  flex: 1 1 auto;
}

.source-video-times {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  flex-wrap: wrap;
  gap: 3px;
  max-width: 100%;
}

.source-time-primary,
.source-time-extra-toggle,
.source-time-extra {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-height: 24px;
  border: 0;
  border-radius: var(--radius-control);
  padding: 0 5px;
  background: transparent;
  color: var(--accent);
  font-size: 11.5px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.source-time-extra-toggle {
  max-height: 28px;
  background: #f2f4f7;
  color: var(--muted);
  cursor: pointer;
}

.source-time-extra-toggle[aria-expanded="true"] {
  background: #eef2f6;
  color: var(--accent-strong);
}

.source-video-channel {
  display: block;
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.25;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  word-break: normal;
  overflow-wrap: normal;
  line-break: auto;
}

.source-video-title {
  display: block;
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 500;
  line-height: 1.32;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  word-break: normal;
  overflow-wrap: normal;
  line-break: auto;
}

.source-video-date {
  min-width: 0;
  overflow: hidden;
  color: var(--muted-2);
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-video-channel:hover,
.source-video-title:hover {
  color: var(--accent-strong);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.source-extra-times {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  min-width: 0;
}

.source-copy-icon {
  grid-area: copy;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--chip-icon-size);
  min-width: var(--chip-icon-size);
  min-height: var(--chip-icon-size);
  border: 1px solid transparent;
  border-radius: 9px;
  padding: 0;
  background: transparent;
  color: var(--muted);
  align-self: center;
}

.source-copy-icon:hover,
.source-copy-icon:focus-visible {
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-color: rgba(15, 118, 110, 0.18);
}

.source-copy-icon svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentcolor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.source-action,
.source-time-more,
.source-collapse-bottom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--chip-height);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 0 var(--chip-padding-x);
  background: #ffffff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.source-collapse-bottom {
  grid-column: 1 / -1;
}

.source-action:hover,
.source-time-more:hover,
.source-collapse-bottom:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.video-copy-setlist {
  width: var(--chip-icon-size);
  min-width: var(--chip-icon-size);
  min-height: var(--chip-icon-size);
  padding: 0;
}

.video-copy-setlist svg {
  width: 16px;
  height: 16px;
}

.source-timestamps {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-width: 0;
}

.source-collapse-bottom {
  justify-self: start;
  margin-top: 2px;
  color: var(--muted);
}

.manual-copy-textarea {
  position: fixed;
  right: 10px;
  bottom: calc(76px + env(safe-area-inset-bottom));
  z-index: 100;
  width: min(520px, calc(100vw - 20px));
  min-height: 150px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  padding: var(--space-3);
  background: #ffffff;
  color: var(--ink);
  font: 12px/1.4 ui-monospace, SFMono-Regular, Consolas, monospace;
  box-shadow: 0 16px 42px rgba(17, 24, 39, 0.16);
}

.trend-badge {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 3px;
  width: max-content;
  min-width: max-content;
  min-height: 20px;
  max-height: 22px;
  border-radius: var(--radius-pill);
  padding: 0 5px;
  background: #f2f4f7;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.trend-up,
.trend-increase,
.trend-new {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.trend-down,
.trend-decrease {
  background: #fff1f3;
  color: #b42318;
}

.source-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: var(--control-compact);
  max-width: 100%;
  border: 0;
  border-radius: var(--radius-pill);
  padding: 0 var(--space-2);
  background: #f8fafc;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-decoration: none;
  white-space: nowrap;
}

.source-link:hover {
  background: #f2f4f7;
}

.source-inline-strip .source-link:not(.source-inline-time):not(.source-inline-extra-time) {
  min-height: 24px;
  border-radius: var(--radius-control);
  padding: 0 6px;
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.source-inline-strip .source-inline-time,
.source-inline-strip .source-inline-extra-time {
  min-height: 18px;
  padding: 0;
  background: transparent;
  color: var(--accent-strong);
  font-size: 11px;
  line-height: 1.15;
}

.source-inline-strip .source-inline-thumb.source-link {
  display: block;
  box-sizing: border-box;
  width: 56px;
  height: 32px;
  min-height: 32px;
  max-height: 32px;
  min-width: 0;
  border-radius: 6px;
  padding: 0;
  background: #e4e7ec;
  color: #ffffff;
}

.source-inline-strip .source-inline-copy {
  width: 30px;
  min-width: 30px;
  min-height: 30px;
}

.source-inline-strip .source-inline-copy-all {
  width: 28px;
  min-width: 28px;
  min-height: 28px;
}

.source-time-primary,
.source-time-extra {
  min-height: 24px;
  max-height: 28px;
  border-radius: var(--radius-control);
  padding: 0 5px;
  background: transparent;
  color: var(--accent);
  font-size: 11.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.time {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  white-space: nowrap;
}

.source-song,
.source-artist {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-artist {
  color: var(--muted-2);
}

/* 12. Song index */
.song-index {
  display: block;
  background: transparent;
  border: 0;
}

.index-toolbar {
  position: sticky;
  top: calc(var(--controls-height) + var(--space-2));
  z-index: 10;
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.index-bucket-select {
  display: none;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.index-bucket-select select {
  min-height: var(--chip-height);
  border-radius: var(--radius-control);
  font-weight: 700;
}

.index-nav {
  display: flex;
  gap: 4px;
  padding: var(--space-2);
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background: rgba(255, 255, 255, 0.94);
  scrollbar-width: none;
}

.index-nav::-webkit-scrollbar {
  display: none;
}

.index-bucket {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  min-width: 34px;
  border: 0;
  border-radius: var(--radius-control);
  padding: var(--space-1) var(--space-2);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
}

.index-bucket:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.index-bucket.is-current,
.index-bucket[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.index-section {
  overflow: visible;
  margin-bottom: var(--space-1);
  border: 0;
  border-radius: 0;
  background: transparent;
  content-visibility: auto;
  contain-intrinsic-size: auto 360px;
  scroll-margin-top: calc(var(--controls-height) + 56px);
}

.index-heading {
  margin: 0;
  padding: var(--space-1) var(--space-2);
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

.index-list {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: var(--panel);
}

.index-list-flat {
  margin-top: 0;
}

.index-row {
  display: grid;
  grid-template-areas:
    "content side"
    "sources sources"
    "drawer drawer";
  grid-template-columns: minmax(0, 1fr) minmax(64px, max-content);
  min-height: 58px;
  align-items: center;
  column-gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  content-visibility: auto;
  contain-intrinsic-size: auto 58px;
  transition: background-color 140ms ease;
}

.index-row .rank-side {
  min-width: 64px;
}

/* 13. Video grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
  gap: var(--space-3);
}

.video-card {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  align-self: start;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background: var(--panel);
  content-visibility: auto;
  contain-intrinsic-size: auto 230px;
  transition:
    border-color 140ms ease,
    background-color 140ms ease;
}

.video-card:hover {
  border-color: var(--line-strong);
  background: #fcfcfd;
}

.thumb-link {
  display: block;
  overflow: hidden;
  background: #111827;
  aspect-ratio: 16 / 9;
}

.thumb {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-body {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: var(--space-2);
  min-width: 0;
  padding: var(--space-3);
}

.video-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: start;
  min-width: 0;
  min-height: 44px;
}

.video-title-wrap {
  min-width: 0;
}

.video-heading-actions {
  display: grid;
  justify-items: end;
  gap: var(--space-1);
  min-width: var(--chip-height);
}

.video-title {
  display: -webkit-box;
  overflow: hidden;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.35;
  text-decoration: none;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.video-meta {
  margin-top: 3px;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.song-count {
  border-radius: var(--radius-pill);
  padding: 3px var(--space-2);
  background: #f2f4f7;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.song-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding-left: 19px;
}

.song-list li {
  min-width: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.35;
}

.song-list a {
  display: block;
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  font-weight: 500;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.song-artist {
  color: var(--muted);
}

.video-more {
  justify-self: start;
  border: 0;
  border-radius: var(--radius-control);
  padding: 3px 0;
  background: transparent;
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 700;
}

.video-more-top {
  margin-top: -2px;
}

.video-more[hidden] {
  display: none;
}

.video-compact {
  grid-template-columns: 1fr;
}

.video-compact .video-card {
  grid-template-columns: 128px minmax(0, 1fr);
  min-height: 86px;
  contain-intrinsic-size: auto 86px;
}

.video-compact .thumb-link {
  height: 100%;
  min-height: 72px;
}

.video-compact .video-body {
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
}

.video-compact .video-title {
  -webkit-line-clamp: 1;
}

.video-compact .song-list {
  gap: 2px;
  padding-left: 18px;
}

/* 14. Empty states and toast */
.empty-state {
  display: block;
}

.empty {
  display: grid;
  justify-items: center;
  gap: var(--space-3);
  min-width: 0;
  padding: 34px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-panel);
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  text-align: center;
}

.empty p {
  max-width: 100%;
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 700;
}

.content-warning {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid rgba(180, 126, 21, 0.3);
  border-radius: var(--radius-control);
  background: rgba(255, 248, 230, 0.94);
  color: var(--text);
}

.content-warning-copy {
  display: grid;
  flex: 1 1 260px;
  gap: 2px;
  min-width: 0;
}

.content-warning-title,
.content-warning-message {
  overflow-wrap: anywhere;
}

.content-warning-title {
  font-size: 13px;
}

.content-warning-message {
  color: var(--muted);
  font-size: 12px;
}

.content-warning-retry {
  min-height: 34px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-control);
  padding: 0 14px;
  background: var(--accent);
  color: #ffffff;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.content-warning-retry:disabled {
  cursor: wait;
  opacity: 0.65;
}

.content-warning-details {
  flex-basis: 100%;
  min-width: 0;
  color: var(--muted);
  font-size: 12px;
}

.content-warning-details summary {
  width: max-content;
  cursor: pointer;
}

.content-warning-details pre {
  max-width: 100%;
  margin: 8px 0 0;
  padding: 8px;
  overflow: auto;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 11px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace;
}

@media (max-width: 640px) {
  .content-warning {
    align-items: stretch;
  }

  .content-warning-retry {
    align-self: center;
  }
}

.clear-search {
  min-height: 34px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-control);
  padding: 0 var(--space-3);
  background: var(--accent);
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
}

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: calc(var(--space-6) + 56px);
  z-index: 45;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(15, 118, 110, 0.24);
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(17, 24, 39, 0.16);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity 140ms ease,
    transform 140ms ease,
    background-color 140ms ease;
}

.back-to-top:hover {
  background: var(--accent-strong);
}

.back-to-top.is-visible,
.back-to-top[data-visible="true"],
.back-to-top[aria-hidden="false"] {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top[hidden] {
  display: none;
}

.toast {
  position: fixed;
  left: 50%;
  right: auto;
  bottom: 18px;
  z-index: 50;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 38px;
  max-width: min(320px, calc(100vw - 32px));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  padding: var(--space-2) var(--space-3);
  background: var(--panel);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  line-height: 16px;
  text-align: center;
  box-shadow: var(--shadow-soft);
  transform: translateX(-50%);
}

.toast[hidden] {
  display: none;
}

.mobile-bottom-nav {
  display: none;
}

/* 15. Responsive breakpoints */
@media (min-width: 920px) and (max-width: 1279px) {
  .controls-inner {
    grid-template-columns: auto minmax(360px, 1fr);
  }

  .query-search-form {
    grid-column: 1 / -1;
    grid-template-columns: minmax(260px, 1fr) auto;
  }

  .view-mode .tab {
    padding: 0 8px;
    font-size: 13px;
  }

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

@media (min-width: 721px) and (max-width: 919px) {
  :root {
    --rank-columns: 42px minmax(0, 1fr) var(--rank-side-width-tablet);
    --source-thumb-width: var(--source-thumb-width-tablet);
  }

  .controls {
    gap: var(--space-2);
  }

  .controls-inner {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .query-search-form {
    grid-column: 1 / -1;
    grid-template-columns: minmax(240px, 1fr) auto;
  }

  .view-mode .tab {
    padding: 0 8px;
    font-size: 13px;
  }

  .pagination-top .page-size-control {
    display: none;
  }

  .pagination-top .pagination-controls {
    flex: 1 1 auto;
    justify-content: flex-end;
  }

  .rank-header {
    display: none;
  }

  .rank-row {
    grid-template-areas:
      "rank content side"
      "sources sources sources"
      "drawer drawer drawer";
    min-height: 76px;
    content-visibility: visible;
    contain-intrinsic-size: auto;
  }

  .rank-row::before {
    display: none;
  }

  .rank-number {
    align-self: start;
    padding-top: 7px;
    font-size: 14px;
    font-weight: 700;
  }

  .rank-content {
    gap: 3px;
  }

  .vtuber-title-line {
    display: contents;
  }

  .vtuber-collected-badge {
    min-height: 18px;
    padding-inline: 6px;
    font-size: 10.5px;
  }

  .rank-row-vtuber .rank-content {
    grid-template-columns: 38px minmax(0, 1fr);
    grid-template-areas:
      "image title"
      "image subline"
      "stats stats";
    column-gap: 7px;
    row-gap: 2px;
    align-items: center;
  }

  .vtuber-display-image {
    width: 38px;
    height: 38px;
  }

  .rank-row-vtuber .rank-title {
    -webkit-line-clamp: 2;
  }

  .rank-subline {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    overflow: hidden;
    font-size: 12px;
    line-height: 1.25;
    white-space: nowrap;
  }

  .rank-subline .subline-video-count {
    display: none;
  }

  .rank-meta-line {
    min-width: 0;
    gap: var(--space-1);
    overflow: hidden;
    white-space: nowrap;
  }

  .rank-row-vtuber .rank-meta-line {
    align-items: center;
  }

  .artist-song-header {
    grid-template-columns: 56px minmax(0, 1fr);
    grid-template-areas:
      "thumb title"
      "thumb actions";
    align-items: start;
    gap: 5px 7px;
  }

  .artist-song-thumb {
    grid-area: thumb;
    width: 56px;
  }

  .artist-song-title-wrap {
    grid-area: title;
  }

  .artist-song-summary-actions {
    grid-area: actions;
    align-self: start;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 4px;
  }

  .rank-meta-line .meta-separator:has(+ .subline-video-count) {
    display: none;
  }

  .subline-primary,
  .artist-song-preview,
  .artist-missing {
    display: block;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .rank-count {
    align-self: start;
    padding: 0;
    background: transparent;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
  }

  .rank-count.is-strong {
    background: transparent;
    color: var(--muted);
  }

  .rank-side {
    align-self: start;
    align-content: start;
    padding-top: 1px;
  }

  .rank-side-top {
    gap: 4px;
  }

  .rank-expand {
    min-width: 0;
    min-height: var(--chip-height);
    padding: 0 6px;
    color: var(--muted);
    font-size: 11.5px;
    font-weight: 700;
  }

  .rank-expand:hover,
  .is-expanded .rank-expand {
    border-color: transparent;
    background: var(--accent-soft);
    color: var(--accent-strong);
  }

  .source-drawer {
    grid-template-columns: 1fr;
    gap: 0;
    min-width: 0;
    padding: var(--space-2) 0 0;
    border-top: 1px solid var(--line);
  }

  .source-drawer-toolbar {
    padding: 0 0 var(--space-2);
  }

  .source-time-primary,
  .source-time-extra-toggle,
  .source-time-extra {
    min-height: 26px;
    padding-inline: 6px;
  }

  .source-video-group {
    border-radius: 0;
    padding: 7px 0;
    gap: 8px;
    border-bottom: 1px solid var(--line);
    background: transparent;
  }

  .source-video-group:last-of-type {
    border-bottom: 0;
  }

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

@media (min-width: 920px) {
  :root {
    --rank-columns: 48px minmax(0, 1fr) var(--rank-side-width-desktop);
  }

  .rank-header {
    display: grid;
  }

  .artist-song-drawer[data-source-mode="vtuber"] {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

}

@media (min-width: 1024px) {
  .layout {
    width: min(var(--page-max), calc(100% - (var(--page-x) * 2)));
  }

  .layout:has(.video-grid) {
    width: min(var(--active-content-max), calc(100% - (var(--page-x) * 2)));
  }
}

@media (min-width: 1280px) {
  .controls-inner {
    grid-template-columns: auto auto minmax(540px, 1fr);
  }

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

@media (max-width: 720px) {
  :root {
    --page-x: 8px;
    --controls-height: 44px;
    --chip-height: 28px;
    --chip-icon-size: 28px;
    --filter-control-height: 36px;
    --rank-columns: 36px minmax(0, 1fr) var(--rank-side-width-mobile);
    --source-thumb-width: var(--source-thumb-width-mobile);
  }

  html,
  body {
    max-width: 100%;
    overflow-x: hidden;
    overscroll-behavior-y: none;
  }

  body.is-modal-open {
    overflow: hidden;
  }

  .layout {
    width: calc(100% - 16px);
    margin-bottom: 0;
    padding-bottom: calc(64px + env(safe-area-inset-bottom));
  }

  .controls {
    min-height: var(--controls-height);
    gap: 0;
    margin-bottom: var(--space-1);
    padding: 4px var(--space-2);
    box-shadow: 0 1px 0 rgba(228, 231, 236, 0.9);
  }

  .controls-inner {
    grid-template-columns: minmax(104px, 0.42fr) minmax(0, 1fr);
    align-items: start;
    gap: 4px 6px;
    width: 100%;
  }

  .view-mode,
  .query-trigger-text {
    display: none;
  }

  .range-mode {
    grid-column: 1;
    width: 100%;
    overflow: visible;
  }

  .range-mode.segmented {
    min-height: 36px;
    padding: 2px;
  }

  .range-mode .tab {
    flex: 1 1 0;
    min-width: 0;
    min-height: 30px;
    padding: 0 6px;
    font-size: 12px;
  }

  .query-search-form {
    display: contents;
  }

  .query-input-shell {
    grid-column: 2;
    grid-template-columns: 24px minmax(0, 1fr) 24px;
    height: 36px;
    min-height: 36px;
    padding: 0 6px;
  }

  .query-search-form .query-submit-button,
  .query-search-form .clear-query-button {
    width: 24px;
    height: 24px;
    margin: 0;
  }

  .query-input-shell input {
    height: 34px;
    font-size: 13px;
    line-height: 34px;
  }

  .query-field-bar {
    grid-column: 1 / -1;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 3px;
    width: 100%;
  }

  .query-field-toggle {
    min-height: 26px;
    padding-inline: 4px;
    font-size: 10.5px;
  }

  .mobile-bottom-nav {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 60;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    min-height: calc(52px + env(safe-area-inset-bottom));
    padding: 3px 8px calc(3px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
  }

  .bottom-nav-item {
    display: grid;
    justify-items: center;
    gap: 2px;
    min-width: 0;
    min-height: 42px;
    border: 0;
    border-radius: var(--radius-control);
    background: transparent;
    color: var(--muted);
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0;
  }

  .bottom-nav-icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 24px;
    border-radius: var(--radius-control);
    background: transparent;
    color: inherit;
  }

  .bottom-nav-icon-wrap svg {
    width: 19px;
    height: 19px;
    fill: none;
    stroke: currentcolor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.9;
  }

  .bottom-nav-item > span:not(.bottom-nav-icon-wrap) {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .bottom-nav-item.active,
  .bottom-nav-item[aria-current="page"] {
    color: var(--accent-strong);
  }

  .bottom-nav-item.active .bottom-nav-icon-wrap,
  .bottom-nav-item[aria-current="page"] .bottom-nav-icon-wrap {
    background: var(--accent-soft);
  }

  .status-alerts {
    margin-bottom: var(--space-1);
  }

  .status-alert {
    padding: 6px 8px;
    font-size: 12px;
  }

  .summary {
    display: grid;
    grid-template-areas:
      "main"
      "actions"
      "note";
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-1);
    min-height: 0;
    margin-bottom: var(--space-1);
    overflow: visible;
    padding: 0;
  }

  .summary.summary--compact {
    grid-template-areas:
      "main actions"
      "note note";
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    column-gap: 6px;
    row-gap: 2px;
  }

  .summary-main {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    column-gap: 6px;
    row-gap: 2px;
    overflow: visible;
    line-height: 16px;
  }

  .summary.summary--compact .summary-main {
    row-gap: 1px;
  }

  .summary-title {
    flex: 0 0 auto;
    max-width: 86px;
    font-size: 13px;
    line-height: 16px;
  }

  .summary-actions {
    display: flex;
    justify-self: end;
    align-self: start;
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .summary-actions::-webkit-scrollbar {
    display: none;
  }

  .summary-segmented {
    width: max-content;
    max-width: 100%;
    gap: 2px;
    padding: 2px;
  }

  .summary-action {
    min-height: 26px;
    padding: 0 8px;
    font-size: 11.5px;
  }

  .summary-metrics {
    display: inline-flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0 6px;
    overflow: visible;
    font-size: 12.2px;
    line-height: 16px;
    white-space: normal;
  }

  .summary-status {
    min-height: 16px;
    font-size: 11.5px;
    line-height: 16px;
  }

  .summary-note {
    display: block;
    margin: 0 0 2px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-size: 11.5px;
    line-height: 1.25;
  }

  .active-query-strip {
    gap: var(--space-1);
    min-height: 26px;
    margin: 0 0 var(--space-1);
  }

  .active-query-chip,
  .active-query-clear {
    min-height: 24px;
    max-width: min(220px, 64vw);
    padding: 0 7px;
    font-size: 11.5px;
  }

  .active-query-clear {
    border: 0;
    background: linear-gradient(90deg, rgba(246, 248, 251, 0.15), var(--bg) 12px);
    padding-right: 0;
    padding-left: 14px;
  }

  .pagination-top {
    display: flex;
    gap: var(--space-1);
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 1px 0 5px;
  }

  .pagination-top .pagination-note {
    display: none;
  }

  .pagination-top .pagination-controls {
    flex: 1 1 auto;
    justify-content: center;
    flex-wrap: nowrap;
    gap: var(--space-1);
  }

  .pagination-top .page-size-control {
    display: none;
  }

  .pagination-top .pagination-button {
    min-width: 28px;
    min-height: 28px;
    padding: 0 6px;
    font-size: 12px;
  }

  .pagination-top .pagination-icon-button {
    flex: 0 0 28px;
    width: 28px;
    padding: 0;
  }

  .pagination-bottom {
    overflow-x: auto;
    padding-bottom: 6px;
  }

  .pagination-bottom .pagination-note,
  .pagination-bottom .page-size-control,
  .pagination-bottom .pagination-controls {
    flex: 0 0 auto;
  }

  .page-select {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    min-height: var(--chip-height);
    color: var(--muted);
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
  }

  .page-select input {
    min-height: 28px;
    height: 28px;
    padding: 0 4px;
  }

  .rank-panel,
  .song-index,
  .index-section {
    border-radius: var(--radius-control);
  }

  .rank-header {
    display: none;
  }

  .rank-row {
    grid-template-areas:
      "rank content side"
      "sources sources sources"
      "drawer drawer drawer";
    row-gap: 4px;
    min-height: 68px;
    column-gap: 8px;
    padding: 7px 8px;
    content-visibility: visible;
    contain-intrinsic-size: auto;
  }

  .rank-row::before {
    display: none;
  }

  .rank-number {
    align-self: start;
    padding-top: 6px;
    font-size: 14px;
    font-weight: 700;
  }

  .rank-content {
    gap: 3px;
  }

  .source-inline-strip {
    grid-template-columns: minmax(0, 1fr);
    align-items: stretch;
    gap: 4px;
    overflow: visible;
    padding: 0;
  }

  .source-inline-preview-rail {
    max-width: none;
  }

  .source-inline-preview-rail {
    grid-column: 1 / -1;
  }

  .source-inline-preview-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
    width: 100%;
  }

  .source-inline-strip[data-source-video-count="1"] .source-inline-preview-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .source-inline-tail {
    display: contents;
  }

  .source-inline-actions {
    grid-column: 1 / -1;
    justify-self: start;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 4px;
    width: auto;
    max-width: 100%;
    margin-top: 4px;
  }

  .source-inline-item,
  .source-inline-more,
  .source-inline-copy-all {
    max-width: none;
  }

  .source-inline-more,
  .source-inline-copy-all {
    align-self: start;
    height: 28px;
    width: auto;
    max-width: 100%;
  }

  .source-inline-item {
    grid-template-columns: 44px minmax(0, 1fr) 24px;
    min-height: 32px;
    padding: 2px 2px 2px 2px;
  }

  .source-inline-strip .source-inline-thumb.source-link {
    width: 44px;
    height: 25px;
    min-height: 25px;
    max-height: 25px;
    padding: 0;
  }

  .source-inline-strip:not(.has-tail-action)[data-source-video-count="1"] .source-inline-item {
    grid-column: 1 / -1;
  }

  .source-inline-empty {
    grid-column: 1 / -1;
  }

  .source-inline-time,
  .source-inline-extra-time,
  .source-inline-time-more {
    min-height: 18px;
    padding: 0;
    font-size: 10.8px;
  }

  .source-inline-time-more {
    padding-inline: 2px;
  }

  .source-inline-time-more-unit {
    display: none;
  }

  .source-inline-main {
    min-width: 0;
  }

  .source-inline-channel {
    max-width: none;
    font-size: 11.5px;
  }

  .source-inline-copy,
  .source-inline-copy-all {
    flex-basis: 24px;
    width: 24px;
    min-width: 24px;
    height: 24px;
    min-height: 24px;
  }

  .source-inline-strip .source-inline-copy,
  .source-inline-strip .source-inline-copy-all {
    width: 24px;
    min-width: 24px;
    height: 24px;
    min-height: 24px;
  }

  .source-inline-copy-all {
    justify-self: end;
    align-self: start;
    width: 28px;
    min-width: 28px;
    min-height: 28px;
    border-color: var(--line);
    background: #f8fafc;
  }

  .source-inline-copy svg,
  .source-inline-copy-all svg {
    width: 15px;
    height: 15px;
  }

  .source-inline-more {
    justify-self: end;
    width: auto;
    min-height: 28px;
    max-width: 100%;
    border-color: var(--line);
    padding-inline: 7px;
    background: #f8fafc;
  }

  .source-inline-extra-times {
    grid-column: 1 / -1;
    padding: 2px 2px 0 54px;
  }

  .rank-title {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.25;
    -webkit-line-clamp: 2;
    word-break: normal;
    overflow-wrap: break-word;
    line-break: auto;
    text-wrap: pretty;
  }

  .rank-subline {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    overflow: hidden;
    font-size: 12px;
    line-height: 1.25;
    white-space: nowrap;
  }

  .rank-subline .subline-video-count {
    display: none;
  }

  .rank-meta-line {
    min-width: 0;
    gap: var(--space-1);
    overflow: hidden;
    white-space: nowrap;
  }

  .rank-meta-line .meta-separator:has(+ .subline-video-count) {
    display: none;
  }

  .subline-primary,
  .artist-song-preview,
  .artist-missing {
    display: block;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .inline-source {
    flex: 0 1 auto;
    width: auto;
    max-width: 100%;
  }

  .inline-source-time {
    min-width: max-content;
  }

  .inline-source-channel {
    min-width: 0;
  }

  .rank-count {
    align-self: start;
    padding: 0;
    background: transparent;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
  }

  .rank-count.is-strong {
    background: transparent;
    color: var(--muted);
  }

  .rank-count-value {
    justify-self: end;
  }

  .rank-side {
    align-self: start;
    justify-items: end;
    align-content: start;
    gap: 2px;
    padding-top: 1px;
  }

  .rank-side-top {
    gap: 3px;
  }

  .trend-badge {
    min-height: 18px;
    max-height: 20px;
    padding: 0 4px;
    font-size: 10px;
  }

  .rank-expand {
    min-width: 0;
    min-height: var(--chip-height);
    padding: 0 7px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
  }

  .rank-row-vtuber .rank-expand {
    min-height: 34px;
    padding: 3px 5px;
    gap: 3px;
    white-space: nowrap;
    line-height: 1.12;
    font-size: 10.5px;
  }

  .rank-expand:hover,
  .is-expanded .rank-expand {
    border-color: transparent;
    background: var(--accent-soft);
    color: var(--accent-strong);
  }

  .index-toolbar {
    position: static;
    top: auto;
    grid-template-columns: minmax(116px, 0.72fr) minmax(0, 1fr);
    align-items: center;
    gap: var(--space-1);
    min-height: 40px;
    margin-bottom: var(--space-1);
    padding: 4px;
    border: 1px solid var(--line);
    border-radius: var(--radius-control);
    background: rgba(255, 255, 255, 0.96);
  }

  .index-bucket-select {
    display: flex;
    grid-column: 1;
    grid-row: 1;
    min-height: 30px;
  }

  .index-bucket-select span {
    flex: 0 0 auto;
  }

  .index-nav {
    display: none;
  }

  .index-pagination {
    grid-column: 2;
    grid-row: 1;
    min-width: 0;
    min-height: 30px;
    padding: 0;
    justify-content: flex-end;
  }

  .index-pagination .pagination-controls {
    justify-content: flex-end;
  }

  .index-pagination .pagination-stepper-index {
    width: auto;
  }

  .index-pagination .page-select-compact {
    padding-inline: 0;
  }

  .index-pagination .page-select-compact input {
    width: 42px;
  }

  .index-section {
    scroll-margin-top: calc(var(--controls-height) + 48px);
    margin-bottom: 0;
    content-visibility: visible;
    contain-intrinsic-size: auto;
  }

  .index-toolbar + .index-section {
    margin-top: var(--space-2);
  }

  .index-toolbar + .index-list {
    margin-top: var(--space-2);
  }

  .index-heading {
    min-height: 24px;
    padding: 4px 8px;
    border-bottom: 0;
    font-size: 11.5px;
  }

  .index-list {
    border-radius: 0;
    border-width: 1px 0 0;
  }

  .index-row {
    grid-template-areas:
      "content side"
      "sources sources"
      "drawer drawer";
    grid-template-columns: minmax(0, 1fr) var(--rank-side-width-mobile);
    row-gap: 4px;
    min-height: 54px;
    padding: 6px 8px;
  }

  .source-drawer {
    display: grid;
    width: 100%;
    min-width: 0;
    grid-template-columns: 1fr;
    align-items: start;
    gap: 0;
    margin-top: 2px;
    padding: 4px 0 0;
    border-top: 1px solid var(--line);
  }

  .artist-song-drawer[data-source-mode="vtuber"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-rows: auto;
    gap: 5px;
  }

  .artist-song-group-vtuber {
    min-height: 0;
    height: auto;
    padding: 3px;
  }

  .artist-song-group-vtuber:last-child {
    padding: 3px;
  }

  .artist-song-group-vtuber .artist-song-header {
    grid-template-columns: 42px minmax(0, 1fr);
    grid-template-areas:
      "thumb title"
      "thumb actions";
    grid-template-rows: auto auto;
    align-items: center;
    column-gap: 4px;
    row-gap: 0;
    min-height: 0;
  }

  .artist-song-group-vtuber .artist-song-thumb {
    width: 42px;
    align-self: center;
  }

  .artist-song-group-vtuber .artist-song-title-wrap {
    min-height: 0;
    align-content: start;
    justify-content: stretch;
    gap: 0;
    text-align: left;
  }

  .artist-song-group-vtuber .artist-song-title {
    font-size: 11px;
    line-height: 1.12;
  }

  .artist-song-group-vtuber .artist-song-artist {
    display: block;
    font-size: 9px;
    line-height: 1.12;
    text-align: left;
  }

  .artist-song-group-vtuber .artist-song-summary-actions {
    grid-area: actions;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    width: 100%;
    align-self: center;
    justify-self: stretch;
    gap: 4px;
    max-width: 100%;
    overflow: visible;
    text-align: left;
  }

  .artist-song-group-vtuber .artist-song-date {
    display: inline-flex;
    align-items: center;
    flex: 1 1 auto;
    height: 18px;
    font-size: 9.5px;
    line-height: 1;
    white-space: nowrap;
  }

  .artist-song-group-vtuber .song-badge {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    height: 18px;
    min-height: 18px;
    padding: 0 5px;
    font-size: 9px;
    line-height: 1;
    white-space: nowrap;
  }

  .artist-song-group-vtuber .artist-song-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    height: 18px;
    min-height: 18px;
    min-width: 0;
    padding: 0 3px;
    border-radius: 0;
    background: transparent;
    color: var(--muted);
    font-size: 10px;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
  }

  .artist-song-group-vtuber button.artist-song-count {
    min-width: 0;
    min-height: 18px;
    margin: 0;
    padding: 0 3px;
    border-radius: 4px;
  }

  .vtuber-card-stats {
    gap: 4px;
    font-size: 10px;
  }

  .vtuber-card-stat {
    gap: 2px;
  }

  .source-drawer-toolbar {
    align-items: center;
    min-height: 30px;
    padding: 0 0 4px;
  }

  .source-drawer-pagination {
    gap: 5px;
  }

  .source-page-jump {
    grid-template-columns: 52px auto 52px;
  }

  .source-page-jump input {
    width: 52px;
  }

  .source-page-total {
    min-width: 38px;
    font-size: 11.5px;
  }

  .source-page-submit {
    padding-inline: 7px;
  }

  .source-drawer-actions {
    justify-content: flex-end;
  }

  .source-drawer-actions .source-copy-all {
    width: 28px;
    min-width: 28px;
    min-height: 28px;
    padding: 0;
    overflow: hidden;
    color: transparent;
  }

  .source-drawer-actions .source-copy-all svg {
    width: 15px;
    height: 15px;
    color: var(--muted);
  }

  .source-video-group {
    grid-template-columns: 64px minmax(0, 1fr) 28px;
    grid-template-areas: "thumb main copy";
    gap: 8px;
    min-height: 56px;
    border-radius: 0;
    padding: 6px 0;
    border-bottom: 1px solid var(--line);
    background: transparent;
  }

  .source-video-thumb-link {
    display: block;
    width: 64px;
  }

  .source-video-main {
    gap: 2px;
  }

  .source-video-identity {
    min-width: 0;
    overflow: hidden;
  }

  .source-video-channel {
    min-width: 0;
    font-size: 12px;
  }

  .source-video-title {
    display: block;
    overflow: hidden;
    font-size: 12px;
    line-height: 1.25;
    text-overflow: ellipsis;
    white-space: nowrap;
    -webkit-line-clamp: initial;
  }

  .source-copy-icon {
    width: 28px;
    min-width: 28px;
    min-height: 28px;
  }

  .source-video-group:last-of-type {
    border-bottom: 0;
  }

  .source-link:not(.source-inline-time):not(.source-inline-extra-time) {
    min-height: 24px;
    padding: 0 5px;
    background: #f8fafc;
    font-size: 11.5px;
  }

  .source-time-primary,
  .source-time-extra-toggle,
  .source-time-extra {
    min-height: 24px;
    padding-inline: 6px;
  }

  .source-time-more,
  .source-collapse-bottom {
    min-height: var(--chip-height);
    border-color: transparent;
    background: #f8fafc;
  }

  .source-collapse-bottom {
    justify-self: start;
    width: auto;
    margin-left: 0;
  }

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

  .video-card,
  .video-compact .video-card {
    grid-template-columns: clamp(120px, 34vw, 144px) minmax(0, 1fr);
    align-items: start;
    min-height: 0;
    border-radius: var(--radius-control);
    contain-intrinsic-size: auto 108px;
  }

  .thumb-link,
  .video-compact .thumb-link {
    grid-column: 1;
    grid-row: 1;
    width: clamp(120px, 34vw, 144px);
    min-height: 0;
    height: auto;
    aspect-ratio: 16 / 9;
  }

  .video-body,
  .video-compact .video-body {
    display: contents;
    padding: 0;
  }

  .video-heading {
    grid-column: 2;
    grid-row: 1;
    gap: 6px;
    padding: 6px 8px 0 0;
  }

  .video-title {
    font-size: 13.5px;
    line-height: 1.3;
    -webkit-line-clamp: 2;
  }

  .video-meta {
    font-size: 11.5px;
  }

  .song-list,
  .video-compact .song-list {
    grid-column: 1 / -1;
    gap: 2px;
    padding: 0 8px 6px 26px;
  }

  .video-card .video-more {
    grid-column: 1 / -1;
    margin-left: 8px;
    margin-bottom: 6px;
  }

  .query-panel {
    top: auto;
    right: 0;
    bottom: var(--visual-viewport-bottom);
    left: 0;
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    width: 100%;
    height: min(calc(var(--visual-viewport-height) - 8px), 92dvh);
    max-height: min(calc(var(--visual-viewport-height) - 8px), 92dvh);
    border-radius: var(--radius-panel) var(--radius-panel) 0 0;
  }

  .query-panel-header {
    min-height: 44px;
    padding-block: 8px;
  }

  .query-panel-header,
  .query-panel-footer {
    padding-inline: 12px;
  }

  .query-search-section {
    padding-top: 8px;
  }

  .query-search-scope-field {
    padding: 6px 12px 0;
  }

  .query-search-section input {
    min-height: 36px;
  }

  .clear-query-button {
    top: calc(8px + 18px);
    right: 13px;
  }

  .query-search-section,
  .query-search-scope-field,
  .query-panel-body {
    padding-inline: 12px;
  }

  .query-panel-body {
    gap: 8px;
    min-height: 0;
    overflow: auto;
    padding-top: 8px;
    padding-bottom: 12px;
  }

  .query-panel-footer {
    padding-block: 8px calc(8px + env(safe-area-inset-bottom));
  }

  .query-discovery-panel,
  .query-filter-matrix {
    gap: 8px;
  }

  .query-panel h2 {
    font-size: 15px;
  }

  .query-section-heading h3,
  .suggestions-section h3 {
    font-size: 13px;
  }

  .query-section-heading {
    min-height: 24px;
  }

  .search-chip,
  .suggestion-item {
    min-height: 30px;
    padding-inline: 8px;
    font-size: 11.5px;
  }

  .query-suggestions {
    max-height: 108px;
  }

  .query-toggle {
    min-height: 32px;
    border-radius: var(--radius-small);
    padding-inline: 8px;
    font-size: 11.5px;
  }

  .query-toggle input[type="checkbox"] {
    width: 14px;
    height: 14px;
  }

  .query-segmented label {
    min-height: 36px;
    border-radius: var(--radius-small);
    font-size: 11.5px;
  }

  .query-field {
    font-size: 10.5px;
  }

  .query-field select,
  .query-field input:not([type="checkbox"]):not([type="radio"]) {
    height: 32px;
    min-height: 32px;
  }

  .query-history-section {
    min-height: 40px;
    border-radius: var(--radius-small);
    padding-inline: 8px;
    font-size: 11.5px;
  }

  .back-to-top {
    right: 12px;
    bottom: calc(60px + env(safe-area-inset-bottom));
    width: 36px;
    height: 36px;
  }

  .toast {
    left: 50%;
    right: auto;
    bottom: calc(64px + env(safe-area-inset-bottom));
    width: fit-content;
    min-height: 38px;
    max-width: min(320px, calc(100vw - 32px));
  }

  .manual-copy-textarea {
    bottom: calc(60px + env(safe-area-inset-bottom));
  }
}

@media (max-width: 340px) {
  :root {
    --rank-side-width-mobile: 58px;
  }

  .rank-row-vtuber .rank-content {
    grid-template-columns: 34px minmax(0, 1fr);
    column-gap: 6px;
    row-gap: 2px;
  }

  .vtuber-display-image {
    width: 34px;
    height: 34px;
  }

  .rank-row-vtuber .rank-title {
    font-size: 14.5px;
  }

  .rank-count,
  .rank-expand {
    font-size: 11px;
  }

  .rank-row-vtuber .rank-expand {
    min-height: 32px;
    padding: 3px 4px;
    gap: 2px;
    font-size: 10px;
  }

  .source-inline-item {
    grid-template-columns: 40px minmax(0, 1fr) 24px;
  }

  .source-inline-strip .source-inline-thumb.source-link {
    width: 40px;
    height: 23px;
    min-height: 23px;
    max-height: 23px;
    padding: 0;
  }

  .artist-song-header {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .artist-song-thumb {
    width: 48px;
  }

  .artist-song-summary-actions {
    justify-self: start;
  }

  .artist-song-group-vtuber .artist-song-header {
    grid-template-columns: 44px minmax(0, 1fr);
    grid-template-areas:
      "thumb title"
      "thumb actions";
    gap: 2px 4px;
  }

  .artist-song-group-vtuber .artist-song-thumb {
    width: 44px;
  }

  .artist-song-group-vtuber .artist-song-title {
    font-size: 10.5px;
  }

  .artist-song-group-vtuber .artist-song-summary-actions {
    overflow: visible;
  }
}

@media (min-width: 721px) {
  .query-field {
    grid-template-columns: 104px minmax(0, 1fr);
    align-items: center;
  }

  .query-field > span:first-child {
    color: var(--muted);
  }

  .query-filter-matrix > .query-compact-field {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .back-to-top {
    bottom: calc(var(--space-6) + 56px);
  }

  .toast,
  .manual-copy-textarea {
    bottom: 20px;
  }
}

@media (max-width: 340px) {
  :root {
    --source-thumb-width: var(--source-thumb-width-narrow);
  }

  .source-video-group {
    grid-template-columns: 50px minmax(0, 1fr) var(--chip-icon-size);
  }

  .source-video-thumb-link {
    width: 50px;
  }

  .source-inline-item {
    grid-template-columns: 40px minmax(0, 1fr) 24px;
    gap: 3px;
  }

  .source-inline-strip .source-inline-thumb.source-link {
    width: 40px;
    height: 23px;
    min-height: 23px;
    max-height: 23px;
    padding: 0;
  }

  .source-inline-more {
    padding-inline: 6px;
  }

  .source-inline-extra-times {
    padding-left: 42px;
  }

  .source-copy-icon {
    width: 24px;
    min-width: 24px;
    min-height: 24px;
    padding: 0;
  }

  .artist-song-drawer[data-source-mode="vtuber"] {
    grid-auto-rows: auto;
    gap: 5px;
  }

  .artist-song-group-vtuber {
    min-height: 0;
    height: auto;
    padding: 3px;
  }

  .artist-song-group-vtuber:last-child {
    padding: 3px;
  }

  .artist-song-group-vtuber .artist-song-header {
    grid-template-columns: 38px minmax(0, 1fr);
    column-gap: 4px;
    row-gap: 0;
  }

  .artist-song-group-vtuber .artist-song-thumb {
    width: 38px;
  }

  .artist-song-group-vtuber .artist-song-title {
    font-size: 11px;
  }

  .artist-song-group-vtuber .artist-song-artist,
  .artist-song-group-vtuber .artist-song-count {
    font-size: 10px;
  }

  .artist-song-group-vtuber .artist-song-date {
    font-size: 9.5px;
  }

  .vtuber-card-stats {
    gap: 3px;
    font-size: 9.5px;
  }
}

@media (max-width: 480px) {
  .video-card,
  .video-compact .video-card {
    grid-template-columns: clamp(118px, 36vw, 136px) minmax(0, 1fr);
  }

  .thumb-link,
  .video-compact .thumb-link {
    width: clamp(118px, 36vw, 136px);
  }

  .source-inline-strip.has-more .source-inline-time-more {
    min-width: 0;
    overflow: hidden;
    text-overflow: clip;
  }

  .source-inline-strip.has-more .source-inline-time-more-unit {
    display: none;
  }

}

/* 16. Accessibility and reduced motion */
a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.34);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}