:root {
  --canvas-red: #d01f11;
  --canvas-red-dark: #b31b10;
  --ink: #2d3b45;
  --muted: #556572;
  --line: #c7cdd1;
  --surface: #ffffff;
  --soft: #f5f5f5;
  --soft-2: #eef1f3;
  --focus: #0076a8;
  --shadow: 0 1px 2px rgba(45, 59, 69, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  background: var(--surface);
}

.public-page,
.auth-page {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 28px;
  background: #f7f8f8;
}

.public-hero,
.auth-panel {
  width: min(100%, 560px);
  padding: 34px;
  border: 1px solid #dfe4e7;
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.public-hero h1,
.auth-panel h1 {
  margin: 0 0 14px;
  font-size: 34px;
  line-height: 1.1;
  letter-spacing: 0;
}

.public-hero p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.55;
}

.auth-kicker {
  margin: 0 0 10px;
  color: var(--canvas-red-dark);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.public-button,
.auth-panel button {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  border: 0;
  border-radius: 4px;
  color: #fff;
  background: var(--canvas-red-dark);
  cursor: pointer;
  text-decoration: none;
}

.auth-panel form {
  display: grid;
  gap: 14px;
}

.auth-panel label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.auth-panel input {
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid #b8c0c6;
  border-radius: 4px;
  color: var(--ink);
}

.auth-error {
  margin: 0;
  color: var(--canvas-red-dark);
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: 88px 300px minmax(0, 1fr);
  min-height: 100vh;
}

.global-nav {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  height: 100vh;
  padding: 0;
  color: #fff;
  background: #24292e;
}

.canvas-mark {
  display: grid;
  place-items: center;
  width: 88px;
  height: 98px;
  margin-bottom: 0;
  background: var(--canvas-red);
  font-size: 40px;
  font-weight: 700;
}

.global-icon {
  display: grid;
  grid-template-rows: 28px auto;
  place-items: center;
  width: 88px;
  min-height: 78px;
  padding: 10px 6px 8px;
  border: 0;
  border-left: 0;
  color: #fff;
  background: transparent;
  cursor: pointer;
  font-size: 24px;
}

.global-icon small {
  font-size: 12px;
  line-height: 1.1;
  text-align: center;
}

.global-icon:hover,
.global-icon.is-active {
  color: var(--canvas-red);
  background: #fff;
}

.course-nav {
  position: sticky;
  top: 98px;
  height: calc(100vh - 98px);
  padding: 20px 24px 26px 28px;
  border-right: 0;
  background: #fff;
  overflow-y: auto;
}

.menu-button {
  width: 46px;
  height: 42px;
  margin: 0 15px 0 0;
  border: 0;
  color: var(--canvas-red);
  background: transparent;
  cursor: pointer;
  font-size: 30px;
}

.course-kicker {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
  font-style: italic;
}

.course-nav h1 {
  margin: 0 0 12px;
  font-size: 18px;
  line-height: 1.25;
  font-weight: 400;
}

.course-select-label {
  display: block;
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 12px;
}

.course-select {
  width: 100%;
  min-height: 36px;
  margin: 0 0 18px;
  padding: 5px 8px;
  border: 1px solid #9ea6ad;
  border-radius: 3px;
  color: var(--ink);
  background: #fff;
}

.session-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 18px;
  padding: 10px 12px;
  border: 1px solid #dfe4e7;
  background: #f8fafb;
}

.session-panel div {
  display: grid;
  gap: 3px;
  min-width: 0;
}

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

.session-panel strong,
.session-chip {
  min-width: 0;
  color: var(--ink);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.session-panel button,
.logout-form button {
  min-height: 32px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--canvas-red-dark);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
  white-space: nowrap;
}

.session-panel button:hover,
.logout-form button:hover {
  border-color: var(--canvas-red-dark);
}

.course-nav nav {
  display: grid;
  gap: 2px;
}

.nav-section-label {
  margin: 18px 0 6px;
  padding: 0 0 6px 8px;
  border-bottom: 1px solid #e0e5e8;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.nav-section-label:first-child {
  margin-top: 0;
}

.nav-link {
  width: 100%;
  min-height: 43px;
  padding: 8px 0 8px 8px;
  border: 0;
  border-left: 3px solid transparent;
  color: var(--canvas-red-dark);
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-size: 18px;
}

.nav-link:hover,
.nav-link.is-active {
  border-left-color: var(--ink);
  color: var(--ink);
  background: #fff;
}

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

.content {
  min-width: 0;
  background: #fff;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 92px;
  padding: 20px 32px 17px 0;
  border-bottom: 1px solid #e6e9eb;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
}

.topbar-title {
  display: flex;
  align-items: center;
  min-width: 0;
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  min-width: 0;
}

.session-chip {
  max-width: 190px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
}

.logout-form {
  margin: 0;
}

.breadcrumb {
  margin-bottom: 6px;
  color: #6b7780;
  font-size: 12px;
}

.topbar h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.2;
  font-weight: 400;
}

.search-box {
  display: grid;
  grid-template-columns: 26px minmax(180px, 320px);
  align-items: center;
  min-width: 260px;
  border: 1px solid #a5afb7;
  border-radius: 3px;
  background: #fff;
}

.search-box span {
  color: var(--muted);
  text-align: center;
}

.search-box input {
  width: 100%;
  height: 40px;
  border: 0;
  outline: 0;
  color: var(--ink);
}

.search-box:focus-within {
  border-color: var(--focus);
  box-shadow: 0 0 0 2px rgba(33, 118, 174, 0.18);
}

.main-view {
  padding: 30px 38px 56px 0;
  max-width: 1120px;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 1px;
  margin-bottom: 28px;
  border: 1px solid var(--line);
  background: var(--line);
}

.start-panel {
  margin-bottom: 28px;
  border: 1px solid var(--line);
  background: #fff;
}

.start-panel-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.start-panel-header h3 {
  margin: 0;
  font-size: 20px;
}

.start-panel-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.quick-action-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(130px, 1fr));
  gap: 1px;
  border-bottom: 1px solid var(--line);
  background: var(--line);
}

.quick-action {
  display: grid;
  gap: 6px;
  min-height: 76px;
  padding: 14px;
  border: 0;
  color: var(--ink);
  background: #fff;
  text-align: left;
  cursor: pointer;
}

.quick-action:hover,
.quick-action:focus-visible {
  color: var(--canvas-red-dark);
  outline: 2px solid rgba(0, 118, 168, 0.22);
  outline-offset: -2px;
}

.quick-action strong {
  font-size: 15px;
}

.quick-action span {
  color: var(--muted);
  font-size: 13px;
}

.home-stat-grid {
  padding: 16px;
}

.stat {
  min-height: 92px;
  padding: 16px;
  background: #fff;
}

.stat-number {
  display: block;
  font-size: 28px;
  font-weight: 700;
}

.stat-label {
  color: var(--muted);
  font-size: 13px;
}

.section-title {
  margin: 28px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid #d7dade;
  font-size: 22px;
  font-weight: 400;
}

.section-note {
  margin: -4px 0 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.local-course-panel {
  margin-bottom: 28px;
  border: 1px solid var(--line);
  background: #fff;
}

.local-course-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.local-course-header h3 {
  margin: 0;
  font-size: 18px;
}

.local-course-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.local-status {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 24px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.local-status-strong {
  border-color: #8bb28d;
  color: #27672c;
  background: #eff7ef;
}

.local-status-partial {
  border-color: #c8a44f;
  color: #765a0c;
  background: #fff8df;
}

.local-status-missing_local,
.local-status-unknown {
  border-color: #b7c0c7;
  color: #52616c;
  background: #f7fafc;
}

.local-path-list {
  display: grid;
  gap: 8px;
  padding: 16px 18px 0;
}

.local-path-list code,
.local-course-meta code {
  display: block;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid #d9dee2;
  background: #f8fafb;
  color: #26323d;
  overflow-wrap: anywhere;
}

.local-course-meta {
  display: grid;
  gap: 7px;
  padding: 14px 18px 0;
}

.local-course-meta span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.local-course-note {
  margin: 0;
  padding: 14px 18px 18px;
  color: var(--muted);
  line-height: 1.45;
}

.module-list {
  display: grid;
  gap: 12px;
}

.module {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #fff;
}

.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  background: #f5f5f5;
}

.module-header h3 {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}

.module-caret {
  display: block;
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 7px solid #2d3b45;
  transform: rotate(90deg);
}

.module-count {
  color: var(--muted);
  white-space: nowrap;
  font-size: 13px;
}

.item-list {
  display: grid;
}

.knowledge-results {
  display: grid;
  gap: 10px;
}

.knowledge-result {
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: #fff;
}

.knowledge-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 8px;
}

.knowledge-result-header strong {
  min-width: 0;
  overflow-wrap: anywhere;
}

.knowledge-result p {
  margin: 10px 0 0;
  line-height: 1.5;
}

.timeline-page {
  display: grid;
  gap: 18px;
}

.timeline-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.timeline-note {
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--soft);
  line-height: 1.45;
}

.timeline-list {
  display: grid;
  gap: 18px;
}

.timeline-month {
  border: 1px solid var(--line);
  background: #fff;
}

.timeline-month h3 {
  margin: 0;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
  font-size: 18px;
}

.timeline-events {
  display: grid;
}

.timeline-event {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.timeline-event:last-child {
  border-bottom: 0;
}

.timeline-date strong,
.timeline-date span {
  display: block;
}

.timeline-date span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.timeline-body {
  min-width: 0;
}

.timeline-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.timeline-title-row strong {
  min-width: 0;
  overflow-wrap: anywhere;
}

.archive-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-height: 54px;
  padding: 11px 16px;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  background: #fff;
  text-align: left;
}

.archive-item:last-child {
  border-bottom: 0;
}

button.archive-item {
  cursor: pointer;
}

button.archive-item:hover {
  background: #f9fbfc;
}

.type-badge {
  display: inline-grid;
  place-items: center;
  justify-self: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  padding: 0;
  color: #3f4a52;
}

.type-icon {
  display: block;
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.55;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.type-icon-link {
  width: 26px;
  height: 26px;
  transform: rotate(-1deg);
}

button.archive-item:hover .type-badge {
  color: var(--ink);
}

.item-title {
  min-width: 0;
  overflow-wrap: anywhere;
}

.item-meta {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.content-frame-wrap {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #fff;
}

.content-frame-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.content-frame-title {
  min-width: 0;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.content-frame-bar a,
.open-link {
  color: var(--canvas-red-dark);
  text-decoration: none;
  font-weight: 700;
}

.content-frame-bar a:hover,
.open-link:hover {
  text-decoration: underline;
}

.content-frame {
  width: 100%;
  height: calc(100vh - 198px);
  min-height: 520px;
  border: 0;
  background: #fff;
}

.assignment-detail {
  display: grid;
  gap: 20px;
}

.assignment-frame {
  height: 560px;
  min-height: 420px;
}

.submission-panel {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #fff;
}

.submission-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: #f5f5f5;
}

.submission-header h3 {
  margin: 0;
  font-size: 22px;
  font-weight: 400;
}

.submission-header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.grade-box {
  min-width: 110px;
  padding: 10px 14px;
  border: 1px solid #b9c1c8;
  background: #fff;
  text-align: right;
}

.grade-box span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.grade-box strong {
  display: block;
  margin-top: 4px;
  font-size: 24px;
}

.submission-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 20px 0;
}

.submission-panel h4 {
  margin: 22px 20px 10px;
  font-size: 18px;
  font-weight: 700;
}

.submission-panel .table,
.submission-panel .empty,
.feedback-comment,
.rubric-json {
  margin: 0 20px 20px;
}

.compact-table .table-row {
  grid-template-columns: minmax(220px, 1.4fr) 120px minmax(0, 1fr) auto;
}

.compact-local-table {
  margin: 0 18px 18px;
}

.compact-local-table .table-row {
  grid-template-columns: minmax(260px, 1.8fr) 130px 120px auto;
}

.feedback-comment {
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.feedback-meta {
  margin-bottom: 12px;
  color: var(--muted);
}

.feedback-body {
  font-size: 18px;
  line-height: 1.55;
  white-space: normal;
}

.rubric-json {
  max-height: 320px;
  overflow: auto;
  padding: 14px;
  border: 1px solid var(--line);
  background: #f8fafb;
  color: #26323d;
}

.table {
  display: grid;
  border: 1px solid var(--line);
}

.table-row {
  display: grid;
  grid-template-columns: minmax(180px, 1.4fr) minmax(110px, 0.6fr) minmax(180px, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 54px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}

.table-row:last-child {
  border-bottom: 0;
}

.table-row.header {
  min-height: 42px;
  color: var(--muted);
  background: var(--soft);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.file-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.pill {
  padding: 3px 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
  font-size: 12px;
}

.empty {
  padding: 28px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--soft);
}

.term-list,
.detail-stack {
  display: grid;
  gap: 18px;
}

.term-section {
  border: 1px solid var(--line);
  background: #fff;
}

.term-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.term-header h3 {
  margin: 0;
  font-size: 18px;
}

.term-header span {
  color: var(--muted);
  font-size: 14px;
}

.term-course-list {
  display: grid;
}

.term-course {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 18px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}

.term-course:last-child {
  border-bottom: 0;
}

.term-course:hover,
.term-course.is-current {
  background: #f7fafc;
}

.term-course.is-current {
  box-shadow: inset 4px 0 0 var(--canvas-red);
}

.term-course-code {
  color: var(--muted);
  font-weight: 700;
}

.term-course-name {
  min-width: 0;
}

.term-course-name .local-status {
  display: inline-flex;
  margin-left: 8px;
  vertical-align: middle;
}

.stats-dashboard {
  display: grid;
  gap: 18px;
}

.stats-summary-grid,
.course-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.current-course-stats {
  border: 1px solid var(--line);
  background: #fff;
}

.course-stat {
  min-height: 86px;
  padding: 15px 16px;
  background: #fff;
}

.course-stat span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.course-stat strong {
  font-size: 22px;
  line-height: 1.2;
}

.stats-table {
  display: grid;
  overflow-x: auto;
}

.stats-row {
  display: grid;
  grid-template-columns: minmax(260px, 1.7fr) 110px 90px 110px 120px 100px 100px;
  align-items: center;
  gap: 14px;
  min-width: 940px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}

.stats-row:last-child {
  border-bottom: 0;
}

.stats-row:not(.stats-row-head):hover,
.stats-row.is-current {
  background: #f7fafc;
}

.stats-row.is-current {
  box-shadow: inset 4px 0 0 var(--canvas-red);
}

.stats-row-head {
  color: var(--muted);
  background: var(--soft);
  font-weight: 700;
}

.stats-row small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.back-button {
  justify-self: start;
  min-height: 38px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font: inherit;
}

.back-button:hover {
  border-color: var(--canvas-red);
  color: var(--canvas-red);
}

.detail-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.detail-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  min-width: 0;
}

.detail-nav span {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.detail-nav-button {
  min-height: 38px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--canvas-red-dark);
  background: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.detail-nav-button:hover {
  border-color: var(--canvas-red-dark);
}

.detail-nav-button:disabled {
  color: var(--muted);
  cursor: default;
  opacity: 0.5;
}

.local-resource-grid {
  display: grid;
  gap: 18px;
  margin-bottom: 28px;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.submitted-resource-grid {
  grid-template-columns: 1fr;
}

.media-preview,
.compact-preview,
.file-preview,
.preview-card {
  min-width: 0;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  background: #fff;
}

.media-preview img,
.compact-preview img {
  display: block;
  max-width: 100%;
  max-height: 520px;
  object-fit: contain;
  border: 1px solid var(--line);
  background: #fff;
}

.media-preview video,
.compact-preview video {
  display: block;
  width: 100%;
  max-height: 560px;
  background: #111;
}

.media-preview audio,
.compact-preview audio {
  display: block;
  width: 100%;
}

.audio-preview {
  display: grid;
  gap: 10px;
}

.media-preview figcaption,
.compact-preview figcaption,
.doc-preview-bar,
.file-preview,
.preview-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
  color: var(--muted);
  font-size: 13px;
}

.media-preview figcaption strong,
.compact-preview figcaption strong,
.doc-preview-bar strong,
.file-preview strong,
.preview-summary strong {
  min-width: 0;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.media-preview figcaption span,
.compact-preview figcaption span,
.doc-preview-bar span {
  white-space: nowrap;
}

.preview-summary > div:first-child {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.preview-button {
  min-height: 32px;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--canvas-red-dark);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}

.preview-button:hover {
  border-color: var(--canvas-red-dark);
}

.preview-button:disabled {
  color: var(--muted);
  cursor: default;
  opacity: 0.72;
}

.preview-mount {
  margin-top: 12px;
}

.preview-mount:empty {
  display: none;
}

.preview-mount > .media-preview,
.preview-mount > .compact-preview,
.preview-mount > .doc-preview,
.preview-mount > .file-preview {
  padding: 0;
  border: 0;
}

.doc-preview {
  min-width: 0;
}

.doc-preview-bar {
  margin-bottom: 10px;
}

.media-row {
  display: block;
}

.media-row > div {
  grid-column: 1 / -1;
}

.inline-local-resource {
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  background: #fff;
}

.inline-local-resource img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: #fff;
}

.inline-local-resource video,
.inline-local-resource audio {
  display: block;
  width: 100%;
  max-width: 100%;
}

.inline-local-resource figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.doc-preview h4 {
  margin: 0 0 10px;
  font-size: 16px;
}

.doc-preview iframe {
  width: 100%;
  min-height: 680px;
  border: 1px solid var(--line);
  background: #fff;
}

mark {
  background: #ffe7a3;
}

@media (max-width: 760px) {
  .app-shell {
    grid-template-columns: 56px minmax(0, 1fr);
  }

  .canvas-mark,
  .global-icon {
    width: 56px;
  }

  .global-icon small {
    display: none;
  }

  .course-nav {
    display: none;
  }

  .mobile-route-nav {
    position: sticky;
    top: 0;
    z-index: 4;
    display: flex;
    gap: 4px;
    padding: 8px 18px;
    border-bottom: 1px solid var(--line);
    background: #fff;
    overflow-x: auto;
  }

  .mobile-route-nav .nav-link {
    flex: 0 0 auto;
    width: auto;
    min-height: 36px;
    padding: 6px 10px;
    border-left: 0;
    border-bottom: 3px solid transparent;
    font-size: 15px;
    white-space: nowrap;
  }

  .mobile-route-nav .nav-link:hover,
  .mobile-route-nav .nav-link.is-active {
    border-bottom-color: var(--ink);
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
    padding: 18px;
  }

  .topbar-actions {
    justify-content: stretch;
    flex-wrap: wrap;
  }

  .detail-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .detail-nav {
    justify-content: space-between;
  }

  .session-chip {
    max-width: none;
  }

  .search-box {
    flex: 1 1 100%;
    grid-template-columns: 26px minmax(0, 1fr);
    min-width: 0;
  }

  .main-view {
    padding: 18px;
  }

  .overview-grid {
    grid-template-columns: repeat(2, minmax(130px, 1fr));
  }

  .stats-summary-grid,
  .course-stat-grid,
  .timeline-summary {
    grid-template-columns: repeat(2, minmax(130px, 1fr));
  }

  .archive-item {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .item-meta {
    display: none;
  }

  .table-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .term-course {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

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

  .timeline-title-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .table-row.header {
    display: none;
  }

  .file-actions {
    justify-content: flex-start;
  }
}