/* A practical workspace for recalling, reading, and comparing solutions. */
:root {
  color-scheme: light;
  --paper: #f6f7f9;
  --white: #fff;
  --sidebar: #fff;
  --ink: #242b36;
  --muted: #646e7d;
  --line: #dfe3ea;
  --line-soft: #edf0f4;
  --accent: #245dc1;
  --accent-hover: #174a9f;
  --accent-soft: #edf3ff;
  --accent-line: #cad9f3;
  --code-bg: #18202c;
  --code-ink: #e2e8f2;
  --sans: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", "Consolas", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 15px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
}

button, input, select {
  font: inherit;
}

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

button {
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

button, select, input {
  min-height: 44px;
}

button:disabled {
  opacity: .5;
  cursor: default;
}

a {
  color: inherit;
  text-decoration: none;
}

button[hidden], [hidden] {
  display: none !important;
}

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible, pre:focus-visible {
  outline: 3px solid #6a96e3;
  outline-offset: 3px;
}

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

.skip-link {
  position: fixed;
  z-index: 20;
  top: -100px;
  left: 20px;
  padding: 10px 16px;
  color: #fff;
  background: var(--accent);
  border-radius: 5px;
}

.skip-link:focus {
  top: 12px;
}

/* Navigation */
.sidebar {
  position: fixed;
  z-index: 2;
  inset: 0 auto 0 0;
  display: flex;
  flex-direction: column;
  width: 232px;
  background: var(--sidebar);
  border-right: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 27px 23px 31px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .025em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 39px;
  padding-bottom: 5px;
  color: #fff;
  background: #273447;
  border-radius: 6px;
  font: italic 31px/1 Georgia, serif;
}

.brand small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font: 9px/1.6 var(--mono);
  letter-spacing: .035em;
}

.sidebar-body {
  flex: 1;
  overflow: auto;
  padding: 0 14px;
}

.section-label {
  margin: 0 12px 9px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.scope-nav {
  display: grid;
  gap: 5px;
}

.scope-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 14px;
  text-align: left;
}

.scope-button > span {
  display: flex;
  gap: 11px;
  align-items: center;
}

.scope-button i {
  width: 18px;
  color: #728094;
  font: normal 20px/1 var(--mono);
}

.scope-button b {
  color: var(--muted);
  font: 12px var(--mono);
}

.scope-button:hover {
  background: #f2f4f7;
}

.scope-button.selected {
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
}

.scope-button.selected i, .scope-button.selected b {
  color: var(--accent);
}

.topic-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 24px 0 2px;
}

.topic-heading .section-label {
  margin-bottom: 0;
}

.topic-heading .text-button {
  min-height: 36px;
  margin-right: 7px;
}

.topic-nav {
  display: grid;
  gap: 1px;
}

.topic-button {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 8px 12px;
  overflow: hidden;
  border-radius: 5px;
  color: #546173;
  font-size: 13px;
  text-align: left;
}

.topic-button::before {
  position: absolute;
  z-index: -1;
  bottom: 5px;
  left: 12px;
  width: var(--coverage, 0);
  max-width: calc(100% - 24px);
  height: 2px;
  background: #e2e9f4;
  content: "";
}

.topic-button span:last-child {
  color: #717e90;
  font: 11px var(--mono);
}

.topic-button:hover {
  background: #f4f6fa;
}

.topic-button.selected {
  color: var(--accent);
  background: var(--accent-soft);
}

.topic-button.selected::before {
  background: #9cb8e5;
}

.sidebar-note {
  margin: 25px 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.sidebar-note p {
  margin: 0 0 8px;
  color: #586578;
  font-size: 14px;
  line-height: 1.8;
}

.sidebar-note small {
  color: var(--muted);
  font-size: 11px;
}

.small-compass {
  float: right;
  color: #94a2b7;
  font-size: 25px;
}

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
}

.sidebar-footer a {
  margin-left: auto;
  color: #4f617a;
}

.sidebar-footer a:hover {
  color: var(--accent);
}

.status-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #7c91af;
}

/* Compact overview: leave the page to the actual questions. */
.workspace {
  margin-left: 232px;
  padding: 0 40px;
  max-width: 1760px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 67px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 11px var(--mono);
  letter-spacing: .035em;
}

.topbar > div {
  display: flex;
  align-items: center;
  gap: 21px;
}

.topbar a, .local-indicator {
  font: 12px var(--sans);
  letter-spacing: 0;
}

.topbar a {
  color: #536782;
}

.topbar a:hover {
  color: var(--accent);
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0 24px;
}

.hero-copy {
  flex: 1;
  min-width: 0;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  color: #6c7e97;
  font: 10px var(--mono);
  letter-spacing: .12em;
}

.eyebrow > span {
  display: inline-block;
  width: 14px;
  height: 1px;
  background: #9eacc0;
}

h1 {
  margin: 0 0 9px;
  color: #253145;
  font-size: 28px;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -.025em;
}

h1 > span {
  color: #7589a5;
}

.hero-description {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 17px;
}

.hero > .hero-actions {
  margin-top: 0;
  flex-shrink: 0;
}

.hero-caption {
  color: #718096;
  font-size: 12px;
}

.notebook-art {
  display: none;
}

.primary-button, .secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.65;
}

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

.primary-button:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.primary-button > span {
  font-size: 18px;
  line-height: 1;
}

.secondary-button {
  color: #405b80;
  background: #fff;
  border-color: #cdd7e6;
}

.secondary-button:hover {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: #adc3e7;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 18px 0 21px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.stats > div {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-left: 25px;
  border-left: 1px solid var(--line);
}

.stats > div:first-child {
  padding-left: 0;
  border: 0;
}

.stat-number {
  color: #334660;
  font: 28px/1.2 var(--mono);
  letter-spacing: -.05em;
}

.stat-label {
  color: var(--muted);
  font-size: 12px;
}

/* Index and filters */
.index-section {
  padding-top: 25px;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.section-title-row {
  display: flex;
  align-items: center;
  gap: 11px;
}

h2 {
  margin: 0;
  font-size: 21px;
  font-weight: 600;
  line-height: 1.5;
}

.count-pill {
  padding: 3px 8px;
  color: #5d718c;
  background: #e9eef6;
  border-radius: 4px;
  font: 11px var(--mono);
  white-space: nowrap;
}

.section-heading p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.text-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 3px 0;
  color: #496891;
  font-size: 12px;
}

.text-button:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.reset-button {
  flex-shrink: 0;
}

.section-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.view-switch {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #edf0f5;
}

.view-switch button {
  min-height: 38px;
  padding: 7px 14px;
  color: #647188;
  border-radius: 4px;
  font-size: 13px;
  white-space: nowrap;
}

.view-switch button:hover {
  color: #304b74;
}

.view-switch button[aria-pressed="true"] {
  color: var(--accent);
  background: #fff;
  box-shadow: 0 1px 3px #263b5b10;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 9px;
}

.search-box {
  display: flex;
  flex: 1 1 210px;
  align-items: center;
  gap: 10px;
  min-width: 170px;
  padding: 0 12px;
  border: 1px solid #cfd6e1;
  border-radius: 6px;
  background: #fff;
}

.search-box > span:first-child {
  color: #7586a0;
  font-size: 24px;
  line-height: 1;
}

.search-box:focus-within {
  border-color: #789bd3;
  box-shadow: 0 0 0 3px #e5edfa;
}

.search-box input {
  width: 100%;
  min-width: 0;
  padding: 8px 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: 0;
  font-size: 14px;
}

.search-box input:focus-visible {
  outline: 0;
}

.search-box input::placeholder {
  color: #7b8697;
}

.search-box kbd {
  padding: 1px 5px;
  color: #7b8799;
  border: 1px solid #d9dfe9;
  border-radius: 3px;
  font: 11px/1.5 var(--mono);
}

.select-wrap {
  display: flex;
  min-width: 116px;
  padding: 0 6px;
  background: #fff;
  border: 1px solid #cfd6e1;
  border-radius: 6px;
}

.select-wrap select {
  width: 100%;
  max-width: 175px;
  padding: 8px 8px 8px 3px;
  color: #53647c;
  background: transparent;
  border: 0;
  font-size: 13px;
  outline-offset: 0;
}

.record-select {
  display: flex;
}

.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.active-filters:not(:empty) {
  margin-top: 12px;
}

.filter-chip {
  min-height: 34px;
  padding: 5px 10px;
  color: #3f6196;
  background: #e7effb;
  border-radius: 4px;
  font-size: 12px;
}

.filter-chip span {
  margin-left: 9px;
  color: #6987b2;
}

.filter-chip:hover {
  background: #dbe7f9;
}

.table-wrap {
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.question-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
}

.question-table th {
  padding: 13px 10px;
  border-bottom: 1px solid var(--line);
  color: #657287;
  text-align: left;
  font-size: 12px;
  font-weight: 500;
}

.question-table th:first-child {
  width: 42%;
  padding-left: 0;
}

.question-table th:nth-child(2) {
  width: 27%;
}

.question-table th:nth-child(3) {
  width: 11%;
}

.question-table th:nth-child(4) {
  width: 15%;
}

.question-table th:last-child {
  width: 5%;
}

.question-table td {
  padding: 12px 10px;
  vertical-align: middle;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.question-table td:first-child {
  padding-left: 0;
}

.question-row {
  cursor: pointer;
}

.question-row:hover {
  background: #eef3fa;
}

.question-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  width: 100%;
  min-height: 32px;
  padding: 0;
  text-align: left;
  font-size: 15px;
  line-height: 1.7;
}

.question-title:hover {
  color: var(--accent);
}

.problem-id {
  min-width: 34px;
  color: #6b7f9a;
  font: 12px var(--mono);
}

.problem-name {
  overflow-wrap: anywhere;
  font-weight: 500;
}

.question-subtitle {
  margin: 0 0 0 46px;
  overflow: hidden;
  color: #758397;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11px;
}

.topic-tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  max-width: 100%;
  margin: 3px 5px 3px 0;
  padding: 3px 7px;
  color: #587092;
  background: #eaf0f8;
  border-radius: 4px;
  white-space: nowrap;
  font-size: 11px;
  line-height: 1.6;
}

button.topic-tag {
  min-height: 32px;
}

button.topic-tag:hover {
  color: var(--accent);
  background: #dae6f8;
}

.topic-more {
  color: #7183a0;
  font: 11px var(--mono);
}

.difficulty {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #68788e;
  font-size: 12px;
  white-space: nowrap;
}

.difficulty::before {
  display: inline-block;
  width: 5px;
  height: 5px;
  background: currentColor;
  border-radius: 50%;
  content: "";
}

.difficulty.easy {
  color: #2c7965;
}

.difficulty.medium {
  color: #9a701f;
}

.difficulty.hard {
  color: #b34b54;
}

.record-label {
  display: block;
  color: #4f6b90;
  font-size: 11px;
  line-height: 1.95;
  white-space: nowrap;
}

.record-label.missing {
  color: #778396;
}

.review-toggle {
  width: 44px;
  min-height: 44px;
  padding: 0;
  color: #8394ad;
  font: 23px/1 var(--mono);
}

.review-toggle:hover, .review-toggle.marked {
  color: var(--accent);
}

.empty-state {
  padding: 49px 20px;
  text-align: center;
}

.empty-state > span {
  display: block;
  color: #96a6bd;
  font-size: 38px;
}

.empty-state h3 {
  margin: 10px 0 8px;
  color: #526883;
  font-size: 20px;
  font-weight: 500;
}

.empty-state p {
  margin: 0 0 17px;
  color: var(--muted);
  font-size: 14px;
}

.list-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin: 16px 0 22px;
}

.list-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 11px;
  color: #5b7396;
}

.pagination button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fff;
}

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

.pagination span {
  min-width: 40px;
  text-align: center;
  font: 12px var(--mono);
}

.mapping-notice {
  margin: 0 0 23px;
  padding: 12px 15px;
  color: #657590;
  border: 1px dashed #c9d5e7;
  border-radius: 6px;
  background: #f0f4fa;
  font-size: 12px;
  line-height: 1.9;
}

.mapping-notice a {
  display: inline-block;
  margin-left: 12px;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.main-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 5px 20px;
  padding: 14px 0 21px;
  color: #737f91;
  border-top: 1px solid var(--line);
  font-size: 11px;
  line-height: 1.9;
}

.main-footer p {
  margin: 0;
}

.main-footer > div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.main-footer .text-button {
  font-size: 11px;
}

.load-error {
  padding: 17px;
  color: #7c5d32;
  background: #fff7e9;
  border: 1px solid #e6d4b4;
  border-radius: 5px;
  font-size: 14px;
}

.load-error a {
  text-decoration: underline;
}

/* Relationships: a readable route between actual questions. */
#relationship-map {
  margin-top: 20px;
}

.map-intro {
  max-width: 850px;
  margin: 0 0 17px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.map-intro p {
  margin: 0 0 7px;
}

.map-intro strong {
  color: #435b7b;
  font-weight: 500;
}

.map-board {
  display: block;
  overflow-x: auto;
  padding: 2px 16px 18px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: #b9c7db transparent;
}

.map-lane {
  width: 100%;
  min-width: 0;
  margin-bottom: 18px;
  border: 1px solid #d9e1ec;
  border-radius: 8px;
  background: #fff;
  scroll-snap-align: start;
}

.lane-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin: 0;
  padding: 18px 17px 7px;
  color: #2d466a;
  font-size: 16px;
  font-weight: 600;
}

.lane-heading h3 {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.lane-heading span, .lane-heading small {
  color: #7486a2;
  font: 11px var(--mono);
}

.lane-description {
  margin: 0 17px 14px;
  color: #718098;
  font-size: 12px;
  line-height: 1.8;
}

.route-steps {
  display: flex;
  align-items: stretch;
  width: max-content;
  gap: 0;
  padding: 0;
}

.route-step {
  position: relative;
  flex: 0 0 245px;
  display: grid;
  grid-template-columns: 27px minmax(0, 1fr);
  align-items: start;
  gap: 4px 9px;
  width: 245px;
  min-height: 98px;
  padding: 13px 11px;
  border: 1px solid #dbe3ef;
  border-radius: 6px;
  background: #fff;
  text-align: left;
}

.route-step:hover {
  border-color: #91b1e1;
  background: #f4f8ff;
}

.route-step:disabled {
  opacity: 1;
  color: #69788e;
  background: #f8f9fb;
  border-color: #e2e7ef;
}

.route-step.available, .route-step.is-local {
  border-color: #c6d7ef;
  background: #f8fbff;
}

.route-step.current, .route-step.selected {
  border-color: #719cde;
  background: var(--accent-soft);
}

.route-step.missing, .route-step.unavailable {
  border-style: dashed;
  background: #fafbfc;
}

.route-step.muted {
  border-style: dashed;
  background: #f8fafc;
  opacity: .66;
}

.route-line {
  display: flex;
  flex: 0 0 29px;
  align-self: center;
  align-items: center;
  justify-content: center;
  min-height: 24px;
  color: #a0b4d2;
  font: 19px/1 var(--mono);
}

.step-number {
  grid-row: 1 / span 3;
  display: grid;
  place-items: center;
  width: 25px;
  min-height: 25px;
  margin-top: 1px;
  color: #6185bb;
  background: #edf3fc;
  border-radius: 4px;
  font: 11px var(--mono);
}

.step-title {
  color: #344d70;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.step-detail {
  color: #74839a;
  font-size: 12px;
  line-height: 1.7;
}

.step-status {
  justify-self: start;
  margin-top: 3px;
  color: #3c6bac;
  font-size: 11px;
  line-height: 1.7;
}

.step-status.missing, .route-step.missing .step-status, .route-step.unavailable .step-status {
  color: #7f8999;
}

/* Reading workspace: fixed chrome, one scrolling reading surface. */
.reader {
  width: min(1440px, calc(100vw - 64px));
  height: min(960px, calc(100dvh - 48px));
  max-width: none;
  max-height: none;
  padding: 0;
  overflow: hidden;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 24px 90px #14263c38;
}

.reader[open] {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.reader.reader-expanded {
  width: 100vw;
  height: 100dvh;
  margin: 0;
  border: 0;
  border-radius: 0;
}

.reader::backdrop {
  background: #202b3a80;
  backdrop-filter: blur(3px);
}

body:has(.reader[open]) {
  overflow: hidden;
}

.reader-header {
  min-width: 0;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.dialog-topline {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 57px;
  padding: 4px 28px;
  border-bottom: 1px solid var(--line-soft);
}

.dialog-topline > span {
  color: var(--muted);
  font-size: 12px;
}

.dialog-topline > .text-button {
  color: var(--ink);
  font-size: 13px;
}

.reader-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.reader-tool {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 12px;
  white-space: nowrap;
}

.reader-tool > span:first-child {
  font: 20px/1 var(--sans);
}

.reader-tool:hover, .reader-tool[aria-pressed=true] {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent);
}

.icon-button {
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--muted);
  border-radius: 6px;
  font: 28px/1 var(--sans);
}

.icon-button:hover {
  background: var(--paper);
  color: var(--ink);
}

.detail-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 28px 18px;
}

.detail-heading > div {
  min-width: 0;
}

.detail-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: 25px;
  font-weight: 600;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.detail-heading h2:focus {
  outline: none;
}

.detail-heading .secondary-button {
  flex-shrink: 0;
  font-size: 12px;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
}

.detail-tags .topic-tag {
  margin: 0;
  color: var(--muted);
  background: var(--paper);
}

.reader-tabline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0 28px;
}

.detail-tabs {
  display: flex;
  gap: 26px;
}

.detail-tabs > button {
  position: relative;
  padding: 12px 0;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.detail-tabs > button[aria-selected=true] {
  color: var(--accent);
  font-weight: 600;
}

.detail-tabs > button[aria-selected=true]::after {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  content: '';
}

.detail-tabs span {
  margin-left: 4px;
  font: 11px var(--mono);
  opacity: .7;
}

#toggle-reader-outline {
  display: none;
  font-size: 12px;
  white-space: nowrap;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 274px;
  min-height: 0;
  overflow: hidden;
}

.detail-content {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scroll-padding-top: 20px;
}

.reader [role=tabpanel] {
  min-height: 220px;
}

#notes-panel {
  padding: 30px 34px;
}

.note-entry + .note-entry {
  margin-top: 32px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.note-entry-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin-bottom: 20px;
}

.note-entry h3 {
  margin: 0;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.note-entry-header a {
  color: var(--accent);
  font-size: 12px;
}

.note-entry-header a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.note-prose {
  max-width: 88ch;
  color: #354052;
  font-size: 16px;
  line-height: 1.95;
  overflow-wrap: anywhere;
}

.note-prose p {
  margin: 12px 0;
  white-space: pre-wrap;
}

.note-prose h4 {
  margin: 24px 0 10px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.note-prose code {
  padding: 2px 5px;
  color: #23549d;
  background: var(--accent-soft);
  border-radius: 4px;
  font: .9em/1.7 var(--mono);
}

.note-prose pre {
  margin: 20px 0;
  padding: 22px;
  overflow-x: auto;
  border: 1px solid #2c3a4c;
  border-radius: 8px;
  background: var(--code-bg);
  white-space: pre;
  tab-size: 4;
}

.note-prose pre code {
  padding: 0;
  color: var(--code-ink);
  background: transparent;
  font: 14px/1.9 var(--mono);
}

.note-empty {
  max-width: 70ch;
  padding: 20px 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.note-empty h3 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 600;
}

.note-empty p {
  margin: 0 0 20px;
}

.recall-box {
  margin: 28px 34px;
  padding: 26px 28px;
  border: 1px solid var(--accent-line);
  border-radius: 8px;
  background: #f6f9ff;
  color: #4b5c76;
  font-size: 15px;
  line-height: 1.9;
}

.recall-box .eyebrow {
  color: var(--accent);
  font-size: 11px;
}

.recall-box h3 {
  margin: 8px 0 14px;
  color: var(--ink);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.6;
}

.recall-box p {
  margin: 8px 0;
}

.recall-box ol {
  margin: 18px 0;
  padding-left: 21px;
}

.recall-box li + li {
  margin-top: 7px;
}

.recall-box .hero-actions {
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 22px;
}

.recall-box .primary-button, .recall-box .secondary-button {
  font-size: 13px;
}

.detail-content > .recall-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin: 8px 34px 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.recall-actions > span {
  margin-right: 4px;
  color: var(--muted);
  font-size: 13px;
}

.recall-actions .secondary-button {
  font-size: 13px;
}

.recall-actions .secondary-button[aria-pressed=true] {
  color: var(--accent);
  border-color: var(--accent-line);
  background: var(--accent-soft);
}

#clear-rating {
  padding: 8px 0;
  border: 0;
  color: var(--muted);
  font-size: 12px;
}

#review-result {
  flex-basis: 100%;
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.code-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  color: var(--muted);
  background: #f8f9fb;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}

.code-toolbar label {
  white-space: nowrap;
}

.code-toolbar select {
  flex: 1;
  min-width: 100px;
  max-width: 100%;
  width: 150px;
  padding: 8px 10px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fff;
  font-size: 12px;
  text-overflow: ellipsis;
}

.code-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.code-actions .text-button {
  font-size: 12px;
  white-space: nowrap;
}

#wrap-code[aria-pressed=true] {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.source-code {
  min-height: 240px;
  max-height: none;
  margin: 0;
  padding: 28px 32px;
  overflow-x: auto;
  color: var(--code-ink);
  background: var(--code-bg);
  tab-size: 4;
  font: 14px/1.95 var(--mono);
}

.source-code code {
  font: inherit;
}

.source-code.wrap-code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.source-path {
  margin: 0;
  padding: 12px 28px;
  color: var(--muted);
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  font: 11px/1.8 var(--mono);
  overflow-wrap: anywhere;
}

.detail-sidebar {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  padding: 24px 20px;
  overflow: auto;
  overscroll-behavior: contain;
  background: #f8f9fb;
  border-left: 1px solid var(--line);
}

.reader-outline-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.reader-outline-heading .section-label {
  margin: 0;
  color: var(--ink);
  font-size: 12px;
}

#reader-position {
  color: var(--muted);
  font: 12px var(--mono);
}

#reader-context {
  margin: 8px 0 16px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

#reader-queue {
  flex: 1 1 auto;
  max-height: min(40dvh, 400px);
  min-height: 88px;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.reader-queue-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 10px;
  color: #586474;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 12px;
  text-align: left;
  line-height: 1.65;
}

.reader-queue-item .queue-number {
  flex-shrink: 0;
  color: #929ba8;
  font: 11px var(--mono);
}

.reader-queue-item[aria-current=step] {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: var(--accent-line);
  font-weight: 600;
}

.reader-queue-item:hover {
  color: var(--accent);
  background: #eef2f8;
}

.reader-resources {
  flex-shrink: 0;
  margin-top: 24px;
  padding-top: 17px;
  border-top: 1px solid var(--line);
}

.reader-resources > summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
}

.resource-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  min-height: 44px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: #425e86;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.resource-link:hover {
  color: var(--accent);
}

.resource-link small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font: 11px/1.6 var(--mono);
}

.resource-link > span {
  flex-shrink: 0;
}

.detail-tip {
  flex-shrink: 0;
  margin: auto 0 0;
  padding-top: 24px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.9;
}

.related-problems {
  margin: 0 34px 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.related-problems h3 {
  margin: 0 0 16px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
}

#related-problems {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.related-card {
  display: block;
  width: 100%;
  padding: 16px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  text-align: left;
  font-size: 13px;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.related-card:hover {
  border-color: var(--accent-line);
  background: #f8faff;
}

.related-card strong {
  display: block;
  font-weight: 600;
}

.related-direction {
  display: block;
  margin-bottom: 6px;
  color: var(--accent);
  font-size: 11px;
}

.related-reason {
  margin: 8px 0;
  color: var(--muted);
  font-size: 12px;
}

.related-kind {
  display: block;
  margin-top: 10px;
  color: #858f9f;
  font-size: 10px;
}

.reader-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-width: 0;
  padding: 12px 28px;
  background: var(--white);
  border-top: 1px solid var(--line);
  box-shadow: 0 -6px 20px #26344604;
}

.reader-progress {
  flex: 1;
  min-width: 0;
}

#reader-progress {
  display: block;
  overflow: hidden;
  color: #536176;
  font-size: 12px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.reader-keyboard-hint {
  display: block;
  margin-top: 4px;
  color: #8a94a2;
  font-size: 10px;
}

#back-problem {
  min-height: 26px;
  padding: 3px 0;
  font-size: 11px;
}

.reader-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  width: min(52%, 540px);
}

.reader-page-button {
  min-width: 0;
  min-height: 58px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  text-align: left;
}

.reader-page-button:last-child {
  border-color: var(--accent-line);
  background: #f6f9ff;
  text-align: right;
}

.reader-page-button > span {
  color: var(--accent);
  font-size: 12px;
}

.reader-page-button strong {
  display: block;
  overflow: hidden;
  margin-top: 2px;
  color: var(--ink);
  font-size: 11px;
  font-weight: 400;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.reader-page-button:hover:enabled {
  background: var(--accent-soft);
  border-color: #a3bce5;
}

.reader-page-button:disabled {
  background: var(--paper);
  border-color: var(--line);
  opacity: .65;
}

.reader-page-button:disabled > span {
  color: var(--muted);
}

.reader-toast {
  position: absolute;
  z-index: 5;
  bottom: 110px;
  left: 50%;
  max-width: 90%;
  padding: 12px 20px;
  transform: translateX(-50%);
  color: #fff;
  background: #263b58;
  border-radius: 6px;
  box-shadow: 0 4px 16px #152c4a30;
  font-size: 13px;
  pointer-events: none;
}

@media (max-width: 1000px) {
  .reader {
    width: calc(100vw - 28px);
    height: calc(100dvh - 28px);
  }

  .detail-layout {
    grid-template-columns: minmax(0, 1fr) 238px;
  }

  .detail-sidebar {
    padding: 20px 14px;
  }

  .dialog-topline, .reader-tabline {
    padding-right: 22px;
    padding-left: 22px;
  }

  .detail-heading {
    padding: 18px 22px 14px;
  }

  .detail-heading h2 {
    font-size: 22px;
  }

  .reader-footer {
    padding: 10px 20px;
  }

}

@media (max-width: 760px) {
  .reader {
    width: 100vw;
    height: 100dvh;
    margin: 0;
    border: 0;
    border-radius: 0;
  }

  .detail-layout {
    display: block;
    position: relative;
  }

  .detail-content {
    height: 100%;
  }

  .detail-sidebar {
    display: none;
    height: 100%;
    border-left: 0;
    padding: 22px;
  }

  .reader.outline-open .detail-sidebar {
    display: flex;
  }

  .reader.outline-open .detail-content {
    display: none;
  }

  #reader-queue {
    max-height: none;
    flex: 1 1 auto;
  }

  #toggle-reader-outline {
    display: block;
  }

  .dialog-topline > span, #toggle-reader-size, .reader-keyboard-hint {
    display: none;
  }

  .dialog-topline {
    min-height: 50px;
    padding: 3px 16px;
  }

  .detail-heading {
    align-items: flex-start;
    gap: 12px;
    padding: 12px 18px;
  }

  .detail-heading h2 {
    font-size: 20px;
  }

  .detail-heading .secondary-button {
    padding: 7px 10px;
    min-height: 38px;
    font-size: 11px;
  }

  .detail-tags {
    flex-wrap: nowrap;
    max-height: 30px;
    overflow: auto;
    scrollbar-width: none;
    margin-top: 8px;
  }

  .detail-tags > span {
    flex-shrink: 0;
  }

  .reader-tabline {
    padding: 0 18px;
  }

  .detail-tabs {
    gap: 20px;
  }

  .detail-tabs > button {
    font-size: 13px;
  }

  #notes-panel {
    padding: 24px 20px;
  }

  .note-prose {
    font-size: 15px;
  }

  .recall-box {
    margin: 22px 20px;
    padding: 20px;
  }

  .recall-box h3 {
    font-size: 18px;
  }

  .detail-content > .recall-actions, .related-problems {
    margin-right: 20px;
    margin-left: 20px;
  }

  .code-toolbar {
    padding: 12px 18px;
    gap: 8px;
  }

  .code-toolbar label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .code-toolbar select {
    font-size: 11px;
  }

  .code-actions {
    gap: 12px;
  }

  .source-code {
    padding: 22px 20px;
    font-size: 13px;
  }

  .source-path {
    padding: 10px 20px;
  }

  .reader-footer {
    display: block;
    padding: 9px 16px max(10px, env(safe-area-inset-bottom));
  }

  .reader-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 7px;
  }

  #reader-progress {
    font-size: 10px;
  }

  #back-problem {
    flex-shrink: 0;
    min-height: 24px;
    font-size: 10px;
  }

  .reader-pager {
    width: 100%;
    gap: 10px;
  }

  .reader-page-button {
    min-height: 52px;
    padding: 6px 11px;
  }

  .reader-toast {
    bottom: 116px;
  }

}

@media (max-width: 480px) {
  .detail-heading h2 {
    font-size: 18px;
  }

  .detail-tabs {
    gap: 15px;
  }

  .detail-tabs span {
    margin-left: 1px;
    font-size: 10px;
  }

  .detail-tabs > button {
    font-size: 12px;
  }

  #toggle-reader-outline {
    font-size: 11px;
  }

  #related-problems {
    grid-template-columns: 1fr;
  }

  .note-prose pre {
    padding: 16px;
  }

  .note-prose pre code {
    font-size: 13px;
  }

  .code-toolbar select {
    flex-basis: 100%;
  }

  .code-actions {
    width: 100%;
    justify-content: flex-end;
  }

}

@media (max-height: 760px) and (min-width: 761px) {
  .detail-sidebar {
    padding: 16px;
  }

  .detail-tip {
    display: none;
  }

  .reader-resources {
    margin-top: 12px;
    padding-top: 12px;
  }

  #reader-context {
    margin-bottom: 10px;
  }
}

/* Tokens for the locally vendored Go highlighter. */
.hljs {
  color: var(--code-ink);
  background: transparent;
}

.hljs-comment, .hljs-quote {
  color: #93a4b9;
  font-style: normal;
}

.hljs-keyword, .hljs-literal, .hljs-selector-tag {
  color: #88baff;
  font-weight: 500;
}

.hljs-built_in, .hljs-type {
  color: #efbd8b;
}

.hljs-string, .hljs-regexp {
  color: #a7d8ae;
}

.hljs-number, .hljs-symbol, .hljs-bullet {
  color: #e9bd8e;
}

.hljs-title, .hljs-title.function_, .hljs-section {
  color: #c5adf6;
}

.hljs-meta, .hljs-name, .hljs-deletion {
  color: #efadb7;
}

.hljs-variable, .hljs-attr, .hljs-attribute, .hljs-params {
  color: #d8e3f2;
}

.hljs-addition {
  color: #9cddb5;
}

.toast {
  position: fixed;
  z-index: 8;
  bottom: 24px;
  left: 50%;
  max-width: 90vw;
  padding: 13px 19px;
  transform: translateX(-50%);
  color: #fff;
  background: #2b4265;
  border-radius: 6px;
  box-shadow: 0 5px 20px #152c4a25;
  font-size: 14px;
}

/* Keep every filter and review action available on smaller screens. */
@media (min-width: 1500px) {
  .workspace {
    padding-right: 55px;
    padding-left: 55px;
  }

  .hero {
    padding-top: 28px;
    padding-bottom: 26px;
  }

}

@media (max-width: 1180px) {
  .sidebar {
    width: 210px;
  }

  .workspace {
    margin-left: 210px;
    padding: 0 28px;
  }

  .brand {
    margin-right: 15px;
    margin-left: 18px;
    gap: 9px;
    font-size: 18px;
  }

  .brand small {
    font-size: 8px;
  }

  .sidebar-body {
    padding-right: 10px;
    padding-left: 10px;
  }

  .sidebar-footer {
    padding-right: 14px;
    padding-left: 14px;
    font-size: 10px;
  }

  .stats > div {
    display: block;
    padding-left: 22px;
  }

  .stat-number {
    display: block;
  }

  .stat-label {
    display: block;
    margin-top: 6px;
  }

  .search-box {
    flex-basis: 170px;
  }

  .select-wrap {
    min-width: 105px;
  }

  .select-wrap select {
    font-size: 12px;
  }

  .question-table th:first-child {
    width: 42%;
  }

  .question-table th:nth-child(2) {
    width: 24%;
  }

  .question-table th:nth-child(4) {
    width: 16%;
  }

  .question-table th:last-child {
    width: 7%;
  }

  .question-table td, .question-table th {
    padding-right: 6px;
    padding-left: 6px;
  }

  .question-title {
    gap: 9px;
  }

  .question-subtitle {
    margin-left: 43px;
  }

}

@media (max-width: 900px) {
  .workspace {
    padding-right: 22px;
    padding-left: 22px;
  }

  .topbar {
    font-size: 10px;
  }

  .local-indicator {
    display: none;
  }

  .hero {
    align-items: flex-start;
    gap: 16px;
  }

  h1 {
    font-size: 25px;
  }

  .hero-description {
    font-size: 13px;
  }

  .hero-caption {
    display: none;
  }

  .section-heading {
    flex-wrap: wrap;
  }

  .section-controls {
    justify-content: flex-start;
    gap: 8px;
  }

  .select-wrap {
    flex: 1;
    min-width: 108px;
  }

  .select-wrap select {
    max-width: none;
  }

  .search-box {
    flex-basis: 100%;
  }

  .question-table th:nth-child(2), .question-table td:nth-child(2) {
    display: none;
  }

  .question-table th:first-child {
    width: 57%;
  }

  .question-table th:nth-child(3) {
    width: 14%;
  }

  .question-table th:nth-child(4) {
    width: 21%;
  }

  .question-table th:last-child {
    width: 8%;
  }

}

@media (max-width: 740px) {
  .sidebar {
    position: relative;
    inset: auto;
    display: block;
    width: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .brand {
    margin: 0;
    padding: 17px 20px 15px;
    font-size: 18px;
  }

  .brand-mark {
    width: 33px;
    height: 35px;
    font-size: 28px;
  }

  .brand small {
    font-size: 9px;
  }

  .sidebar-body {
    padding: 0 13px 12px;
    overflow: visible;
  }

  .sidebar-body > .section-label, .topic-heading, .topic-nav, .sidebar-note, .sidebar-footer {
    display: none;
  }

  .scope-nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 4px;
  }

  .scope-button {
    justify-content: center;
    gap: 8px;
    padding: 9px 5px;
    font-size: 12px;
    white-space: nowrap;
  }

  .scope-button > span {
    gap: 6px;
  }

  .scope-button i {
    width: 14px;
    font-size: 16px;
  }

  .scope-button b {
    font-size: 10px;
  }

  .workspace {
    margin-left: 0;
    padding-right: 22px;
    padding-left: 22px;
  }

  .topbar {
    min-height: 51px;
  }

  .hero {
    padding: 23px 0;
  }

  .hero > .hero-actions {
    margin-top: 4px;
  }

  .hero-description {
    font-size: 14px;
  }

  .stats > div {
    padding-left: 17px;
  }

  .stat-label {
    font-size: 11px;
  }

  .index-section {
    padding-top: 22px;
  }

  .section-heading {
    margin-bottom: 14px;
  }

  .section-heading p {
    font-size: 12px;
  }

  .section-controls {
    width: 100%;
    justify-content: space-between;
  }

  .question-table th:nth-child(2), .question-table td:nth-child(2) {
    display: table-cell;
  }

  .question-table th:first-child {
    width: 42%;
  }

  .question-table th:nth-child(2) {
    width: 24%;
  }

  .question-table th:nth-child(3) {
    width: 11%;
  }

  .question-table th:nth-child(4) {
    width: 16%;
  }

  .question-table th:last-child {
    width: 7%;
  }

}

@media (max-width: 520px) {
  .workspace {
    padding-right: 17px;
    padding-left: 17px;
  }

  .brand {
    padding-left: 18px;
  }

  .scope-nav {
    gap: 2px;
  }

  .scope-button {
    gap: 4px;
    font-size: 11px;
  }

  .scope-button i {
    display: none;
  }

  .scope-button b {
    font-size: 10px;
  }

  .topbar {
    font-size: 9px;
  }

  .topbar a {
    font-size: 11px;
  }

  .hero {
    display: block;
    padding-top: 22px;
  }

  h1 {
    font-size: 26px;
  }

  .hero-description {
    font-size: 13px;
  }

  .hero-actions, .hero > .hero-actions {
    margin-top: 15px;
  }

  .hero-caption {
    display: block;
  }

  .stats {
    padding: 17px 0 19px;
  }

  .stats > div {
    padding-left: 12px;
  }

  .stat-number {
    font-size: 25px;
  }

  .stat-label {
    font-size: 10px;
    line-height: 1.65;
  }

  h2 {
    font-size: 20px;
  }

  .section-title-row {
    gap: 8px;
  }

  .count-pill {
    font-size: 10px;
  }

  .section-heading p {
    font-size: 11px;
  }

  .view-switch button {
    min-height: 42px;
    padding-right: 13px;
    padding-left: 13px;
  }

  .filters {
    gap: 7px;
  }

  .search-box {
    flex-basis: 100%;
    padding-right: 10px;
    padding-left: 10px;
  }

  .search-box input {
    font-size: 13px;
  }

  .select-wrap {
    min-width: 0;
  }

  .select-wrap select {
    font-size: 12px;
  }

  .question-table th:nth-child(2), .question-table td:nth-child(2) {
    display: none;
  }

  .question-table th:first-child {
    width: 53%;
  }

  .question-table th:nth-child(3) {
    width: 14%;
  }

  .question-table th:nth-child(4) {
    width: 23%;
  }

  .question-table th:last-child {
    width: 10%;
  }

  .question-table td, .question-table th {
    padding-right: 4px;
    padding-left: 4px;
  }

  .question-title {
    gap: 7px;
    font-size: 15px;
  }

  .problem-id {
    min-width: 26px;
    font-size: 11px;
  }

  .question-subtitle {
    margin-left: 33px;
    font-size: 10px;
  }

  .difficulty {
    gap: 4px;
    font-size: 11px;
  }

  .record-label {
    font-size: 10px;
  }

  .review-toggle {
    width: 36px;
  }

  .list-footer {
    gap: 8px;
  }

  .list-footer p {
    font-size: 11px;
  }

  .pagination {
    gap: 6px;
  }

  .pagination span {
    min-width: 34px;
    font-size: 11px;
  }

  .pagination button {
    width: 40px;
  }

  .mapping-notice {
    padding: 11px 12px;
    font-size: 12px;
  }

  .mapping-notice a {
    display: block;
    margin-left: 0;
  }

  .main-footer {
    font-size: 10px;
  }

  .main-footer > div {
    gap: 10px;
  }

  .main-footer .text-button {
    font-size: 11px;
  }

  .map-lane {
    width: 100%;
  }

  .map-intro {
    font-size: 12px;
  }

}

@media (pointer: coarse) {
  button.topic-tag, .filter-chip, .question-title, .view-switch button, .topic-heading .text-button {
    min-height: 44px;
  }

  .review-toggle, .pagination button {
    min-width: 44px;
  }

}

@media (prefers-reduced-motion: no-preference) {
  button, a {
    transition: color .12s ease, background-color .12s ease, border-color .12s ease;
  }

}