:root {
  --v2-primary: #3d78f5;
  --v2-primary-dark: #2f64d8;
  --v2-primary-soft: #eaf1ff;
  --v2-canvas: #f4f7fd;
  --v2-surface: #ffffff;
  --v2-line: #e5eaf3;
  --v2-ink: #1d2433;
  --v2-muted: #788399;
  --v2-soft-muted: #a1abc0;
  --v2-success: #2bb58a;
  --v2-warning: #ff9b45;
  --v2-danger: #e96c78;
  --v2-purple: #7769e8;
  --v2-shadow: 0 10px 28px rgba(46, 76, 133, .07);
}

.courseos-app {
  background: var(--v2-canvas);
  color: var(--v2-ink);
  font-family: "Noto Sans SC", "Manrope", sans-serif;
}

.courseos-app .app {
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: 100vh;
}

.courseos-app .sidebar {
  background: var(--v2-surface);
  border-right: 1px solid var(--v2-line);
  padding: 18px 14px 14px;
  min-height: 0;
  max-height: 100vh;
  overflow-y: auto;
}

.courseos-app .brand {
  padding: 0 11px 19px;
}

.courseos-app .brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--v2-primary);
  color: #fff;
  transform: none;
  box-shadow: 0 6px 14px rgba(61, 120, 245, .22);
}

.courseos-app .brand b {
  color: var(--v2-ink);
  font-size: 17px;
}

.courseos-app .brand small,
.courseos-app .section-label {
  color: var(--v2-soft-muted);
}

.courseos-app .section-label {
  letter-spacing: .04em;
  padding: 9px 12px 5px;
}

.courseos-app .nav {
  gap: 2px;
}

.courseos-app .nav button {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 12px;
  color: #68748b;
  padding: 8px 12px;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.courseos-app .nav button:hover {
  background: #f4f7ff;
  color: var(--v2-primary);
}

.courseos-app .nav button.active {
  background: var(--v2-primary);
  border-color: var(--v2-primary);
  color: #fff;
  box-shadow: 0 8px 18px rgba(61, 120, 245, .2);
}

.courseos-app .nav button.active .icon {
  color: #fff;
}

.courseos-app .nav button[data-view] > span:last-child {
  min-width: 0;
}

.courseos-app .side-bottom {
  border-top: 1px solid var(--v2-line);
  padding: 10px 10px 0;
  flex: none;
}

.courseos-app .preview-institution {
  margin-top: 0;
  min-height: 42px;
  border-radius: 11px;
  background: var(--v2-primary-soft);
  color: var(--v2-primary);
  font-weight: 700;
}

.courseos-app .preview-institution:hover {
  background: var(--v2-primary);
  color: #fff;
}

.courseos-app .profile {
  color: var(--v2-ink);
}

.courseos-app .avatar {
  background: #dce7ff;
  color: var(--v2-primary);
}

.courseos-app .main {
  background: var(--v2-canvas);
}

.courseos-app .topbar,
.courseos-app .institution-top {
  min-height: 76px;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid var(--v2-line);
  box-shadow: 0 1px 0 rgba(61, 120, 245, .02);
}

.courseos-app .topbar {
  height: 76px;
  padding: 0 36px;
}

.courseos-app .crumb {
  color: var(--v2-soft-muted);
}

.courseos-app .crumb strong {
  color: var(--v2-ink);
}

.courseos-app .global-search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 9px;
  width: min(330px, 30vw);
  min-height: 42px;
  margin-left: auto;
  margin-right: 18px;
  padding: 0 14px;
  border: 1px solid var(--v2-line);
  border-radius: 12px;
  background: #f8faff;
  color: var(--v2-soft-muted);
}

.courseos-app .global-search:focus-within {
  border-color: #9ebaff;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(61, 120, 245, .1);
}

.courseos-app .global-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--v2-ink);
  font-size: 12px;
}

.courseos-app .global-search input::placeholder {
  color: var(--v2-soft-muted);
}

.courseos-app .global-search-panel {
  display: none;
  position: absolute;
  z-index: 100;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  max-height: min(420px, 65vh);
  overflow: auto;
  border: 1px solid var(--v2-line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 14px 36px rgba(28, 42, 68, .16);
  color: var(--v2-ink);
}

.courseos-app .global-search.search-open .global-search-panel {
  display: block;
}

.courseos-app .global-search-results button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 58px;
  padding: 8px 12px;
  border-bottom: 1px solid #eef1f6;
  text-align: left;
}

.courseos-app .global-search-results button:hover,
.courseos-app .global-search-results button.active {
  background: #eef4ff;
}

.courseos-app .global-search-type {
  flex: 0 0 36px;
  color: #426bad;
  font-size: 11px;
}

.courseos-app .global-search-copy {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.courseos-app .global-search-copy b,
.courseos-app .global-search-copy small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.courseos-app .global-search-copy b {
  font-size: 13px;
}

.courseos-app .global-search-copy small,
.courseos-app .global-search-status {
  color: var(--v2-soft-muted);
  font-size: 11px;
}

.courseos-app .global-search-status {
  padding: 12px 14px;
}

.courseos-app .top-actions,
.courseos-app .institution-top-actions {
  gap: 10px;
}

.courseos-app .top-icon {
  width: 40px;
  height: 40px;
  border: 1px solid var(--v2-line);
  border-radius: 12px;
  background: #fff;
  color: #7c88a0;
}

.courseos-app .top-icon:hover {
  border-color: #b6c9f9;
  color: var(--v2-primary);
  background: var(--v2-primary-soft);
}

.courseos-app .user-pill {
  padding-left: 6px;
  color: var(--v2-ink);
}

.courseos-app .content {
  max-width: 1500px;
  padding: 34px 38px 64px;
}

.courseos-app .headline {
  margin-bottom: 26px;
}

.courseos-app .headline h1,
.courseos-app .inst-page-head h2,
.courseos-app .inst-welcome h2 {
  color: var(--v2-ink);
  letter-spacing: 0;
}

.courseos-app .headline h1 {
  font-size: 31px;
}

.courseos-app .headline p,
.courseos-app .inst-page-head p,
.courseos-app .inst-welcome p {
  color: var(--v2-muted);
}

.courseos-app .eyebrow {
  color: var(--v2-primary);
  letter-spacing: .08em;
}

.courseos-app .primary,
.courseos-app .inst-primary {
  min-height: 42px;
  border: 1px solid var(--v2-primary);
  border-radius: 11px;
  background: var(--v2-primary);
  color: #fff;
  box-shadow: 0 7px 16px rgba(61, 120, 245, .18);
}

.courseos-app .primary:hover,
.courseos-app .inst-primary:hover {
  border-color: var(--v2-primary-dark);
  background: var(--v2-primary-dark);
  transform: translateY(-1px);
}

.courseos-app .ghost,
.courseos-app .inst-ghost {
  min-height: 40px;
  border: 1px solid var(--v2-line);
  border-radius: 11px;
  background: #fff;
  color: #68748b;
}

.courseos-app .ghost:hover,
.courseos-app .inst-ghost:hover {
  border-color: #b6c9f9;
  background: var(--v2-primary-soft);
  color: var(--v2-primary);
}

.courseos-app .stats,
.courseos-app .inst-metrics,
.courseos-app .homework-summary {
  gap: 16px;
}

.courseos-app .stat,
.courseos-app .panel,
.courseos-app .course-card,
.courseos-app .inst-panel,
.courseos-app .inst-metrics > div,
.courseos-app .homework-summary > div,
.courseos-app .homework-list,
.courseos-app .product-large,
.courseos-app .overview-subject,
.courseos-app .product-overview-bar,
.courseos-app .builder-preview {
  border: 1px solid var(--v2-line);
  border-radius: 16px;
  background: var(--v2-surface);
  box-shadow: var(--v2-shadow);
}

.courseos-app .stat {
  padding: 20px;
}

.courseos-app .stat-head,
.courseos-app .panel-title {
  color: var(--v2-muted);
}

.courseos-app .stat-num {
  color: var(--v2-ink);
  font-size: 30px;
}

.courseos-app .trend {
  color: var(--v2-success);
}

.courseos-app .trend.down,
.courseos-app .badge.orange,
.courseos-app .warning {
  color: var(--v2-warning);
}

.courseos-app .stat-mark {
  border-radius: 12px;
  background: var(--v2-primary-soft);
  color: var(--v2-primary);
}

.courseos-app .badge,
.courseos-app .ready {
  border-radius: 7px;
  background: #e8f8f2;
  color: #1e9d78;
}

.courseos-app .badge.orange,
.courseos-app .warning {
  background: #fff2e5;
}

.courseos-app .toolbar .search input,
.courseos-app .search input,
.courseos-app select,
.courseos-app .inst-search {
  border-color: var(--v2-line);
  border-radius: 12px;
  background: #fff;
}

.courseos-app .toolbar .search input:focus,
.courseos-app .search input:focus,
.courseos-app select:focus {
  border-color: #9ebaff;
  box-shadow: 0 0 0 4px rgba(61, 120, 245, .1);
}

.courseos-app .course-card:hover,
.courseos-app .overview-subject:hover,
.courseos-app .product-large:hover {
  border-color: #b6c9f9;
  box-shadow: 0 15px 30px rgba(46, 76, 133, .12);
  transform: translateY(-2px);
}

.courseos-app .course-card .cover,
.courseos-app .product-large,
.courseos-app .summary-cover {
  border-radius: 16px 16px 0 0;
}

.courseos-app .cover:before {
  background: linear-gradient(180deg, rgba(16, 31, 66, .02), rgba(16, 31, 66, .42));
}

.courseos-app .level-tab.active,
.courseos-app .product-tabs button.active,
.courseos-app .material-filter button.active {
  border-color: var(--v2-primary);
  background: var(--v2-primary);
  color: #fff;
  box-shadow: 0 7px 15px rgba(61, 120, 245, .16);
}

.courseos-app .level-tab,
.courseos-app .product-tabs button,
.courseos-app .material-filter button {
  border-radius: 11px;
}

.courseos-app .curriculum-tree,
.courseos-app .level-workspace-units,
.courseos-app .builder-side {
  background: #fbfcff;
}

.courseos-app .system.selected-system,
.courseos-app .builder-node:hover,
.courseos-app .builder-node.active,
.courseos-app .level-workspace-unit.active,
.courseos-app .institution-nav.active {
  background: var(--v2-primary-soft);
  color: var(--v2-primary);
}

.courseos-app .institution-shell {
  background: var(--v2-canvas);
}

.courseos-app .level-workspace {
  grid-template-columns: 264px minmax(0, 1fr);
  height: clamp(600px, calc(100vh - 180px), 800px);
  min-height: 0;
  align-items: stretch;
}

.courseos-app .level-workspace-units {
  min-height: 0;
  max-height: none;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.courseos-app .level-workspace-units-head {
  flex: none;
  padding: 10px 2px 12px;
  border-bottom: 0;
  background: transparent;
}

.courseos-app .level-workspace-unit-list {
  display: grid;
  grid-auto-rows: max-content;
  align-content: start;
  gap: 10px;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0 4px 4px 0;
}

.courseos-app .level-workspace-unit-item {
  position: relative;
  min-width: 0;
}

.courseos-app .level-workspace-unit {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 155px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--v2-line);
  border-radius: 6px;
  background: #fff;
  color: var(--v2-ink);
  text-align: left;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.courseos-app .level-workspace-unit-edit {
  position: absolute;
  right: 9px;
  bottom: 9px;
  z-index: 2;
  min-width: 48px;
  min-height: 30px;
  padding: 5px 8px;
  border: 1px solid #d2def3;
  border-radius: 5px;
  background: #fff;
  color: #3669c3;
  font-size: 11px;
  font-weight: 700;
}

.courseos-app .level-workspace-unit-edit:hover,
.courseos-app .level-workspace-unit-edit:focus-visible {
  border-color: var(--v2-primary);
  background: var(--v2-primary-soft);
  outline-offset: 2px;
}

.courseos-app .level-workspace-lesson-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-content: start;
}

.courseos-app .level-lesson-body {
  min-width: 0;
}

.courseos-app .level-lesson-tags span {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.courseos-app .level-lesson-tags span:first-child {
  flex: 1 1 100%;
}
.courseos-app .level-lesson-body h4 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.courseos-app[data-courseos-catalog-mode="preview"] #productOverview .explorer-card-footer,
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview .explorer-unit-actions,
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview .level-workspace-unit-edit,
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview .level-workspace-add-unit,
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview .level-lesson-actions,
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview [data-explorer-action^="add-"],
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview [data-explorer-action^="edit-"],
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview [data-explorer-action^="delete-"],
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview [data-explorer-action="configure-lesson"],
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview [data-explorer-action="import-course"],
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview [data-explorer-action="publish-product"],
.courseos-app[data-courseos-catalog-mode="preview"] #productOverview [data-explorer-action="materials-product"] {
  display: none !important;
}

.courseos-app .level-workspace-unit:hover,
.courseos-app .level-workspace-unit.active {
  border-color: #8eaffb;
  background: #fff;
  box-shadow: 0 2px 9px rgba(47, 100, 216, .09);
}

.courseos-app .level-workspace-unit:focus-visible,
.courseos-app .level-workspace-add-unit:focus-visible {
  outline: 2px solid var(--v2-primary);
  outline-offset: 2px;
}

.courseos-app .level-workspace-unit-cover,
.courseos-app .level-lesson-cover {
  position: relative;
  overflow: hidden;
  background-color: #e3eaf5;
  background-size: cover;
  background-position: center;
}

.courseos-app .level-workspace-unit-cover {
  display: flex;
  align-items: flex-end;
  width: 100%;
  height: 94px;
  padding: 10px 12px;
}

.courseos-app .institution-level-workspace .institution-unit-cover {
  min-height: 0;
}

.courseos-app .level-workspace-unit-cover::after,
.courseos-app .level-lesson-cover.has-cover-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(16, 31, 49, .53));
  pointer-events: none;
}

.courseos-app .level-workspace-unit-cover > span,
.courseos-app .level-lesson-cover > * {
  position: relative;
  z-index: 1;
}

.courseos-app .level-workspace-unit-cover > span {
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  text-shadow: 0 1px 3px rgba(0, 0, 0, .4);
}

.courseos-app .level-lesson-cover.has-cover-image {
  color: #fff;
}

.courseos-app .level-workspace-unit-copy {
  display: grid;
  gap: 5px;
  padding: 10px 12px 11px;
}

.courseos-app .level-workspace-unit-copy b {
  font-size: 12px;
  white-space: normal;
  overflow-wrap: anywhere;
  line-height: 1.4;
}

.courseos-app .level-workspace-unit-copy small {
  margin: 0;
  color: var(--v2-muted);
  font-size: 10px;
}

.courseos-app .level-workspace-unit-open {
  color: var(--v2-primary);
  font-size: 10px;
  font-weight: 700;
}

.courseos-app .level-workspace-unit-state {
  display: none;
}

.courseos-app .level-workspace-add-unit {
  width: 100%;
  min-height: 54px;
  border: 1px dashed #b9c9e5;
  border-radius: 6px;
  background: #f9fbff;
  color: #5072ad;
  font-size: 11px;
  font-weight: 700;
}

.courseos-app .level-workspace-add-unit:hover {
  border-color: var(--v2-primary);
  background: var(--v2-primary-soft);
}

.courseos-app .level-workspace-main {
  min-height: 0;
  overflow: hidden;
}

@media (max-width: 1000px) {
  .courseos-app .app {
    grid-template-columns: 72px minmax(0, 1fr);
  }
}

@media (max-width: 1100px) {
  .courseos-app .level-workspace-lesson-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .courseos-app .app {
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
  }

  .courseos-app .main {
    min-width: 0;
  }
}

.courseos-app .institution-side {
  background: #fff;
  border-color: var(--v2-line);
}

.courseos-app .institution-card-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.courseos-app .institution-lesson-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.courseos-app .institution-lesson-card {
  display: flex;
  flex-direction: column;
}
.courseos-app .institution-lesson-cover {
  min-height: 110px;
  flex: none;
}
.courseos-app .institution-lesson-card > div:last-child {
  min-width: 0;
  display: flex;
  flex: 1;
  flex-direction: column;
}
.courseos-app .institution-lesson-card p {
  height: auto;
  min-height: 32px;
}
.courseos-app .institution-lesson-actions {
  margin-top: auto;
}
.courseos-app .institution-lesson-card h3,
.courseos-app .institution-lesson-card p {
  overflow-wrap: anywhere;
}

@media (max-width: 1280px) {
  .courseos-app .institution-card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .courseos-app .institution-lesson-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .courseos-app .institution-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .courseos-app .institution-card-grid { grid-template-columns: minmax(0, 1fr); }
  .courseos-app .institution-lesson-grid { grid-template-columns: minmax(0, 1fr); }
}

.courseos-app[data-courseos-catalog-mode="preview"] .product-wall {
  max-width: 1400px;
}
.courseos-app[data-courseos-catalog-mode="preview"] .wall-head,
.courseos-app[data-courseos-catalog-mode="preview"] .wall-footnote,
.courseos-app[data-courseos-catalog-mode="design"] .platform-preview-head,
.courseos-app[data-courseos-catalog-mode="design"] .platform-preview-intro {
  display: none;
}
.courseos-app .platform-preview-head { margin-bottom: 16px; }
.courseos-app .platform-preview-intro { margin-bottom: 18px; }
.courseos-app[data-courseos-catalog-mode="preview"] #platformCourseExplorer {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}
.courseos-app .platform-catalog-search {
  min-width: min(290px, 100%);
}
@media (max-width: 760px) {
  .courseos-app[data-courseos-catalog-mode="preview"] .platform-catalog-search {
    width: 100%;
  }
}

.courseos-app .institution-logo {
  padding-bottom: 30px;
}

.courseos-app .institution-logo .brand-mark {
  background: var(--v2-primary);
}

.courseos-app .institution-user {
  border: 1px solid var(--v2-line);
  border-radius: 14px;
  background: #f7f9ff;
}

.courseos-app .institution-nav {
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 12px;
  color: #68748b;
}

.courseos-app .institution-nav:hover,
.courseos-app .institution-nav.active {
  border-color: #d1defc;
  background: var(--v2-primary-soft);
  color: var(--v2-primary);
}

.courseos-app .institution-main {
  background: var(--v2-canvas);
}

.courseos-app .institution-top {
  height: 86px;
  padding: 0 42px;
}

.courseos-app .institution-global-search {
  margin-right: 16px;
}

.courseos-app .institution-content {
  max-width: 1400px;
  padding: 34px 42px 64px;
}

.courseos-app .inst-metrics > div {
  padding: 20px;
}

.courseos-app .inst-metrics > div b {
  color: var(--v2-ink);
}

.courseos-app .schedule-card,
.courseos-app .prep-item,
.courseos-app .team-row,
.courseos-app .homework-row {
  border-color: var(--v2-line);
}

.courseos-app .classroom-screen {
  background: var(--v2-canvas) !important;
  color: var(--v2-ink) !important;
}

.courseos-app .classroom-tools,
.courseos-app .courseos-wb-rail,
.courseos-app .courseos-wb-right {
  background: #fff !important;
  border-color: var(--v2-line) !important;
}

.courseos-app .classroom-tools button:hover,
.courseos-app .classroom-tools .tool-active,
.courseos-app .courseos-wb-nav button.active,
.courseos-app .courseos-wb-resource.active {
  background: var(--v2-primary-soft) !important;
  border-color: #c8d7fb !important;
  color: var(--v2-primary) !important;
}

@media (max-width: 1000px) {
  .courseos-app .global-search {
    width: min(280px, 32vw);
  }
}

@media (max-width: 760px) {
  .courseos-app .institution-shell.visible {
    display: flex;
    flex-direction: column;
  }

  .courseos-app .institution-side {
    display: flex;
    flex: none;
    align-items: center;
    flex-wrap: nowrap;
    gap: 7px;
    width: 100%;
    min-height: 62px;
    padding: 8px 12px;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    border-right: 0;
    border-bottom: 1px solid var(--v2-line);
  }

  .courseos-app .institution-logo {
    flex: none;
    width: auto;
    padding: 0 8px 0 0;
  }

  .courseos-app .institution-logo small,
  .courseos-app .institution-user,
  .courseos-app .institution-nav-label {
    display: none;
  }

  .courseos-app .institution-nav,
  .courseos-app .inst-exit {
    flex: none;
    width: auto;
    min-height: 40px;
    margin: 0;
    padding: 8px 10px;
  }

  .courseos-app .institution-main {
    flex: 1;
    min-height: 0;
  }

  .courseos-app .level-workspace {
    display: flex;
    flex-direction: column;
    height: auto;
    gap: 12px;
  }

  .courseos-app .level-workspace-units {
    max-height: none;
    overflow: visible;
  }

  .courseos-app .level-workspace-main {
    overflow: visible;
  }

  .courseos-app .level-workspace-unit-list {
    display: flex;
    gap: 9px;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0 0 9px;
    scroll-snap-type: x proximity;
  }

  .courseos-app .level-workspace-unit-item {
    flex: 0 0 174px;
    min-width: 174px;
    scroll-snap-align: start;
  }

  .courseos-app .level-workspace-unit {
    flex: 0 0 174px;
    min-width: 174px;
    scroll-snap-align: start;
  }

  .courseos-app .level-workspace-lesson-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .courseos-app .level-workspace-unit-cover {
    height: 76px;
  }

  .courseos-app .level-workspace-add-unit {
    flex: 0 0 116px;
    width: 116px;
    min-height: 142px;
  }

  .courseos-app .topbar {
    padding: 0 18px;
  }

  .courseos-app .crumb span:first-child,
  .courseos-app .crumb span:nth-child(2) {
    display: none;
  }

  .courseos-app .global-search {
    width: auto;
    flex: 1;
    margin-left: 18px;
    margin-right: 10px;
  }

  .courseos-app .user-pill {
    display: none;
  }

  .courseos-app .content,
  .courseos-app .institution-content {
    padding: 24px 16px 44px;
  }

  .courseos-app .institution-top {
    padding: 0 18px;
  }

  .courseos-app .institution-top {
    height: auto;
    min-height: 104px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .courseos-app .institution-global-search {
    display: flex;
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    margin: 0;
  }

  .courseos-app .institution-top-actions {
    grid-column: 2;
    grid-row: 1;
  }

  .courseos-app .topbar .global-search {
    min-width: 0;
  }

  .courseos-app .topbar .global-search-panel {
    left: auto;
    right: -48px;
    width: min(360px, calc(100vw - 24px));
  }

  .courseos-app .headline h1 {
    font-size: 25px;
  }
}

/* One-lesson workspace: the courseware is the canvas, libraries stay close by. */
html:has(body.courseos-app .courseos-workbench.open),
html:has(body.courseos-app .lesson-studio.open),
html:has(body.courseos-app .entity-editor.open),
body.courseos-app:has(.courseos-workbench.open),
body.courseos-app:has(.lesson-studio.open),
body.courseos-app:has(.entity-editor.open) {
  overflow: hidden;
}

.courseos-app #entityEditor {
  z-index: 100;
}

.courseos-app .lesson-studio-head > div:first-child {
  min-width: 0;
}

.courseos-app .lesson-studio-head h2 {
  overflow-wrap: anywhere;
}

.courseos-app .lesson-studio-head-actions {
  display: flex;
  flex: none;
  align-items: center;
  gap: 10px;
}

.courseos-app .lesson-studio-dialog {
  width: min(1120px, 100%);
  height: min(92vh, 850px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 8px;
}

.courseos-app .lesson-studio-head,
.courseos-app .studio-foot {
  flex: none;
}

.courseos-app .lesson-studio-body {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
}

.courseos-app .lesson-studio-lessons {
  display: flex;
  flex: none;
  gap: 6px;
  padding: 9px 20px;
  overflow-x: auto;
  overflow-y: hidden;
  border-right: 0;
  border-bottom: 1px solid var(--v2-line);
  white-space: nowrap;
  background: #f7f9fc;
}

.courseos-app .studio-lesson {
  flex: none;
  width: auto;
  max-width: 220px;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  border-radius: 5px;
}

.courseos-app .lesson-studio-main {
  min-height: 0;
  overflow-y: auto;
  padding: 22px 24px 30px;
  background: #f7f9fc;
}

.courseos-app .studio-main-feature {
  display: grid;
  grid-template-columns: minmax(210px, 42%) minmax(0, 1fr);
  min-height: 235px;
  overflow: hidden;
  border: 1px solid var(--v2-line);
  border-radius: 7px;
  background: #fff;
}

.courseos-app .studio-feature-cover {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 235px;
  padding: 18px;
  background: #cbdcf5 center / cover no-repeat;
}

.courseos-app .studio-feature-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
}

.courseos-app .studio-feature-cover span {
  position: relative;
  z-index: 1;
  padding: 5px 8px;
  border-radius: 3px;
  background: rgba(22, 36, 53, .8);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

.courseos-app .studio-feature-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
}

.courseos-app .studio-feature-copy h3 {
  margin: 9px 0;
  overflow-wrap: anywhere;
  font-size: 19px;
  line-height: 1.4;
}

.courseos-app .studio-feature-copy p,
.courseos-app .studio-library-section header span {
  color: var(--v2-muted);
  font-size: 11px;
  line-height: 1.5;
}

.courseos-app .studio-feature-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.courseos-app .studio-library-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.courseos-app .studio-library-section {
  min-width: 0;
}

.courseos-app .studio-library-section header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.courseos-app .studio-library-section h3 {
  margin: 0 0 3px;
  font-size: 15px;
}

.courseos-app .studio-library-items {
  display: grid;
  gap: 7px;
}

.courseos-app .studio-library-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  min-height: 66px;
  padding: 7px;
  border: 1px solid var(--v2-line);
  border-radius: 6px;
  background: #fff;
}

.courseos-app .studio-library-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  overflow: hidden;
  border-radius: 4px;
  background: #e9f0fa center / cover no-repeat;
  color: #4168a2;
  font-size: 10px;
  font-weight: 700;
}

.courseos-app .studio-library-item > div {
  min-width: 0;
}

.courseos-app .studio-library-item b,
.courseos-app .studio-library-item small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.courseos-app .studio-library-item b { font-size: 12px; }
.courseos-app .studio-library-item small { margin-top: 4px; color: var(--v2-muted); font-size: 10px; }
.courseos-app .studio-library-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 3px; }
.courseos-app .studio-library-item button { min-height: 34px; padding: 6px 9px; font-size: 11px; }
.courseos-app .studio-library-empty { padding: 24px 12px; border: 1px dashed #c9d3e2; color: var(--v2-muted); text-align: center; font-size: 11px; }
.courseos-app .studio-interaction { margin-top: 20px; background: #fff; border-color: var(--v2-line); }
.courseos-app .studio-interaction summary { cursor: pointer; font-size: 12px; font-weight: 700; }
.courseos-app .studio-interaction summary span { color: var(--v2-muted); font-weight: 400; }
.courseos-app #lessonStudioInteractions { margin-top: 12px; }

.courseos-app .platform-preview-resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.courseos-app .platform-preview-resource-card {
  min-width: 0;
  padding: 0 0 12px;
  overflow: hidden;
  border: 1px solid #dfe7e7;
  border-radius: 7px;
  background: #fff;
  text-align: left;
}
.courseos-app .platform-preview-resource-cover {
  display: grid;
  height: 120px;
  margin-bottom: 10px;
  place-items: center;
  overflow: hidden;
  background: #e9f0f4;
  color: #496077;
}
.courseos-app .platform-preview-resource-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.courseos-app .platform-preview-resource-card strong,
.courseos-app .platform-preview-resource-card small,
.courseos-app .platform-preview-resource-open {
  display: block;
  margin: 5px 12px 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.courseos-app .platform-preview-resource-card strong { font-size: 12px; }
.courseos-app .platform-preview-resource-card small { color: #76858b; font-size: 10px; }
.courseos-app .platform-preview-resource-open { color: #126f64; font-size: 11px; }
.courseos-app .platform-preview-main-image {
  display: block;
  max-width: 100%;
  max-height: 68vh;
  margin: auto;
  object-fit: contain;
}
.courseos-app .platform-material-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0 0 16px;
}
.courseos-app .platform-material-filters button {
  min-height: 38px;
  padding: 7px 12px;
  border: 1px solid #cbd9d5;
  border-radius: 5px;
  background: #fff;
  color: #344b50;
  font-size: 12px;
}
.courseos-app .platform-material-filters button.active {
  border-color: #087f78;
  background: #e6f5ef;
  color: #086e68;
  font-weight: 700;
}
.courseos-app .platform-material-filters span { margin-left: 4px; color: #78898d; }
.courseos-app .platform-asset-viewer {
  position: fixed;
  z-index: 300;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(17, 27, 32, .82);
}
.courseos-app .platform-asset-viewer-dialog {
  display: flex;
  flex-direction: column;
  width: min(1180px, 100%);
  height: min(880px, calc(100dvh - 40px));
  min-height: 0;
  overflow: hidden;
  border: 1px solid #dce8e2;
  border-radius: 8px;
  background: #fff;
}
.courseos-app .platform-asset-viewer-dialog header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  border-bottom: 1px solid #e3ebe7;
}
.courseos-app .platform-asset-viewer-dialog header div { min-width: 0; }
.courseos-app .platform-asset-viewer-dialog header small { color: #087f78; font-size: 11px; }
.courseos-app .platform-asset-viewer-dialog h3 { margin: 3px 0 0; font-size: 15px; overflow-wrap: anywhere; }
.courseos-app .platform-asset-viewer-dialog button {
  min-height: 36px;
  padding: 6px 12px;
  border: 1px solid #cbd9d5;
  border-radius: 5px;
  background: #fff;
  color: #344b50;
}
.courseos-app .platform-asset-viewer-dialog button:focus-visible,
.courseos-app .platform-material-filters button:focus-visible { outline: 2px solid #087f78; outline-offset: 2px; }
.courseos-app .platform-asset-viewer-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 18px;
  background: #edf3f2;
}
.courseos-app .platform-asset-viewer-image {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: contain;
}
.courseos-app .platform-asset-viewer-image[hidden] { display: none; }
.courseos-app .platform-asset-viewer-media { max-width: 100%; max-height: 100%; background: #101b1d; }
.courseos-app video.platform-asset-viewer-media { width: min(100%, 960px); aspect-ratio: 16/9; }
.courseos-app audio.platform-asset-viewer-media { width: min(100%, 640px); }
.courseos-app .platform-asset-viewer-text {
  width: min(100%, 940px);
  max-height: 100%;
  margin: 0;
  overflow: auto;
  padding: 22px;
  border: 1px solid #d9e5e0;
  background: #fff;
  color: #273f45;
  font: 13px/1.7 ui-monospace, monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.courseos-app .platform-asset-viewer-message { color: #607477; font-size: 13px; text-align: center; }
.courseos-app .platform-asset-viewer-dialog footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 10px;
  border-top: 1px solid #e3ebe7;
}
.courseos-app .platform-asset-viewer-dialog footer[hidden] { display: none; }
.courseos-app .platform-asset-viewer-dialog footer span { min-width: 60px; text-align: center; font-size: 12px; color: #607477; }
.courseos-app .platform-asset-viewer-dialog footer button:disabled { opacity: .4; cursor: not-allowed; }
@media (max-width: 680px) {
  .courseos-app .platform-asset-viewer { padding: 6px; }
  .courseos-app .platform-asset-viewer-dialog { height: calc(100dvh - 12px); }
  .courseos-app .platform-asset-viewer-screen { padding: 8px; }
  .courseos-app .platform-material-filters { flex-wrap: nowrap; overflow-x: auto; }
  .courseos-app .platform-material-filters button { flex: none; }
}

.courseos-app .platform-lesson-preview {
  padding: 12px;
  background: rgba(22, 31, 51, .66);
}
.courseos-app .platform-lesson-preview-dialog {
  width: min(1540px, 100%);
  height: min(1100px, calc(100dvh - 24px));
  border: 1px solid var(--v2-line);
  border-radius: 6px;
  box-shadow: 0 24px 72px rgba(22, 31, 51, .24);
}
.courseos-app .platform-lesson-preview-head {
  min-height: 60px;
  padding: 12px 20px;
  border-color: var(--v2-line);
}
.courseos-app .platform-lesson-preview-head b { color: var(--v2-ink); font-size: 16px; }
.courseos-app .platform-lesson-preview-head small { color: var(--v2-muted); font-size: 11px; }
.courseos-app .platform-lesson-preview-close {
  width: 36px;
  height: 36px;
  border-color: var(--v2-line);
  border-radius: 4px;
  color: var(--v2-muted);
}
.courseos-app .platform-lesson-preview-close:hover {
  color: var(--v2-primary);
  background: var(--v2-primary-soft);
}
.courseos-app .platform-lesson-preview-body {
  padding: 18px 20px 24px;
  background: #fff;
}
.courseos-app .platform-preview-section-head { margin-bottom: 14px; }
.courseos-app .platform-preview-section-head h3 { color: var(--v2-ink); font-size: 16px; }
.courseos-app .platform-preview-section-head p { color: var(--v2-muted); font-size: 12px; }
.courseos-app .platform-lesson-preview-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  overflow: visible;
  padding: 0 20px;
  border-color: var(--v2-line);
  background: #fff;
}
.courseos-app .platform-lesson-preview-tab {
  min-width: 0;
  min-height: 50px;
  padding: 10px 8px;
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  background: #fff;
  color: var(--v2-muted);
  font-size: 13px;
  font-weight: 700;
}
.courseos-app .platform-lesson-preview-tab:hover {
  background: var(--v2-primary-soft);
  color: var(--v2-primary);
}
.courseos-app .platform-lesson-preview-tab.active {
  border-color: var(--v2-primary);
  background: var(--v2-primary-soft);
  color: var(--v2-primary-dark);
}
.courseos-app .platform-lesson-preview-tab:focus-visible,
.courseos-app .platform-preview-resource-card:focus-visible {
  outline: 2px solid var(--v2-primary);
  outline-offset: 2px;
}
.courseos-app .platform-lesson-preview .catalog-story-badge {
  border-color: var(--v2-line);
  background: var(--v2-primary-soft);
  color: var(--v2-primary-dark);
}
.courseos-app .platform-lesson-preview .platform-preview-resource-card:hover {
  border-color: var(--v2-primary);
}
.courseos-app .platform-lesson-preview .platform-preview-resource-card,
.courseos-app .platform-lesson-preview .platform-knowledge-grid {
  border-color: var(--v2-line);
}
.courseos-app .platform-lesson-preview .platform-preview-resource-card small,
.courseos-app .platform-lesson-preview .platform-preview-materials-head span {
  color: var(--v2-muted);
}
.courseos-app .platform-lesson-preview .platform-preview-resource-card em,
.courseos-app .platform-lesson-preview .platform-knowledge-grid h4 {
  color: var(--v2-primary-dark);
}
.courseos-app .platform-lesson-preview .platform-preview-resource-open {
  color: var(--v2-primary-dark);
}
.courseos-app .platform-lesson-preview .platform-material-filters button {
  border-color: var(--v2-line);
  color: var(--v2-muted);
}
.courseos-app .platform-lesson-preview .platform-material-filters button.active {
  border-color: var(--v2-primary);
  background: var(--v2-primary-soft);
  color: var(--v2-primary-dark);
}
.courseos-app .platform-lesson-preview .platform-material-filters button:focus-visible {
  outline-color: var(--v2-primary);
}
.courseos-app .platform-preview-materials { margin-top: 18px; }
.courseos-app .platform-preview-materials-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.courseos-app .platform-preview-materials-head h3 { margin: 0; font-size: 15px; }
.courseos-app .platform-preview-materials-head span { color: #657477; font-size: 12px; }
.courseos-app .platform-preview-materials .platform-preview-empty { min-height: 90px; }
.courseos-app .platform-preview-materials .platform-preview-resource-grid {
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
.courseos-app .platform-preview-materials .platform-preview-resource-cover { height: 76px; }
.courseos-app .platform-knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 24px;
  padding: 20px;
  border: 1px solid #dfe7e7;
  background: #fff;
}
.courseos-app .platform-knowledge-grid section { min-width: 0; }
.courseos-app .platform-knowledge-grid h4 {
  margin: 0 0 8px;
  color: #146e68;
  font-size: 13px;
}
.courseos-app .platform-knowledge-grid h4:not(:first-child) { margin-top: 20px; }
.courseos-app .platform-knowledge-grid p,
.courseos-app .platform-knowledge-grid li {
  margin: 0 0 6px;
  color: #344b50;
  font-size: 13px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.courseos-app .platform-knowledge-grid ul { margin: 8px 0 0; padding-left: 20px; }
.courseos-app .platform-ppt-shell {
  position: relative;
  display: block;
  height: auto;
  min-height: 0;
  padding-right: 202px;
}
.courseos-app .platform-ppt-player,
.courseos-app .platform-ppt-pages {
  min-height: 0;
}
.courseos-app .platform-ppt-player {
  border: 1px solid var(--v2-line);
  border-radius: 4px;
  background: #fff;
}
.courseos-app .platform-ppt-pages {
  position: absolute;
  inset: 0 0 0 auto;
  display: flex;
  flex-direction: column;
  width: 190px;
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--v2-line);
  border-radius: 4px;
  background: #fff;
}
.courseos-app .platform-ppt-pages-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid var(--v2-line);
}
.courseos-app .platform-ppt-pages-head b { font-size: 12px; }
.courseos-app .platform-ppt-pages-head span { color: #75858a; font-size: 10px; }
.courseos-app .platform-ppt-page-list {
  min-height: 0;
  overflow-y: auto;
  padding: 9px;
  scrollbar-gutter: stable;
}
.courseos-app .platform-ppt-page-thumb {
  display: block;
  width: 100%;
  margin-bottom: 9px;
  padding: 6px;
  border: 1px solid #dfe7e7;
  border-radius: 6px;
  background: #fff;
  color: #53647a;
  text-align: left;
}
.courseos-app .platform-ppt-page-thumb.active,
.courseos-app .platform-ppt-page-thumb:hover {
  border-color: var(--v2-primary);
  background: var(--v2-primary-soft);
}
.courseos-app .platform-ppt-page-thumb:focus-visible {
  outline: 2px solid var(--v2-primary);
  outline-offset: 2px;
}
.courseos-app .platform-ppt-page-image {
  display: grid;
  width: 100%;
  aspect-ratio: 16 / 9;
  place-items: center;
  overflow: hidden;
  background: #e8edf1;
}
.courseos-app .platform-ppt-page-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.courseos-app .platform-ppt-page-thumb > span:last-child {
  display: block;
  padding: 6px 2px 0;
  font-size: 11px;
  font-weight: 700;
}
.courseos-app .platform-ppt-pages-empty {
  margin: 0;
  padding: 16px 8px;
  color: #75858a;
  font-size: 11px;
  line-height: 1.5;
}
.courseos-app .platform-ppt-stage {
  position: relative;
  flex: none;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 0;
  overflow: hidden;
  padding: 0;
  background: #171d29;
}
.courseos-app .platform-ppt-stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  object-fit: contain;
  box-shadow: none;
}
.courseos-app .platform-ppt-stage img[hidden] { display: none !important; }
.courseos-app .platform-ppt-native-host {
  position: absolute;
  inset: 0;
  z-index: 1;
  min-width: 0;
  min-height: 0;
  background: #fff;
}
.courseos-app .platform-ppt-native-host .pptxv,
.courseos-app .platform-ppt-native-host .pptxv-body,
.courseos-app .platform-ppt-native-host .pptxv-stage-wrap {
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
}
.courseos-app .platform-ppt-mode-status {
  margin: 9px 0 0;
  color: var(--v2-muted);
  font-size: 11px;
}
.courseos-app .platform-ppt-media {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--v2-line);
}
.courseos-app .platform-ppt-media[hidden] { display: none; }
.courseos-app .platform-ppt-media-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.courseos-app .platform-ppt-media-head h4 { margin: 0; font-size: 14px; color: var(--v2-ink); }
.courseos-app .platform-ppt-media-head p { margin: 5px 0 0; font-size: 11px; color: var(--v2-muted); }
.courseos-app .platform-ppt-media-head > span { flex: none; color: var(--v2-primary); font-size: 11px; }
.courseos-app .platform-ppt-media-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr)); gap: 12px; }
.courseos-app .platform-ppt-media-item { min-width: 0; padding: 12px; border: 1px solid var(--v2-line); border-radius: 4px; background: #fff; }
.courseos-app .platform-ppt-media-item > div { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.courseos-app .platform-ppt-media-item b { flex: none; font-size: 12px; color: var(--v2-ink); }
.courseos-app .platform-ppt-media-item small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--v2-muted); font-size: 10px; }
.courseos-app .platform-ppt-media-item audio,
.courseos-app .platform-ppt-media-item video { display: block; width: 100%; max-height: 280px; }
.courseos-app .platform-ppt-media-item img { display: block; max-width: 100%; max-height: 220px; object-fit: contain; }
.courseos-app .platform-ppt-media-error { margin: 8px 0 0; color: #a94343; font-size: 11px; }
.courseos-app .platform-ppt-media-error[hidden] { display: none; }
.courseos-app .platform-ppt-toolbar {
  min-height: 48px;
  padding: 7px 12px;
  border-color: var(--v2-line);
  background: #fff;
}
.courseos-app .platform-ppt-toolbar button {
  min-height: 32px;
  padding: 6px 10px;
  border-color: var(--v2-line);
  border-radius: 4px;
  color: var(--v2-ink);
  font-size: 11px;
}
.courseos-app .platform-ppt-toolbar button:hover {
  border-color: var(--v2-primary);
  color: var(--v2-primary);
}
.courseos-app .platform-ppt-page { color: var(--v2-muted); font-size: 11px; }
.courseos-app .platform-preview-materials {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--v2-line);
}
.courseos-app .platform-ppt-player:is(:fullscreen, .presentation-mode) {
  position: relative;
  width: 100vw;
  height: 100dvh;
  border: 0;
  border-radius: 0;
  background: #10151a;
}
.courseos-app .platform-ppt-player.presentation-mode {
  position: fixed;
  inset: 0;
  z-index: 400;
}
.courseos-app .platform-ppt-player:is(:fullscreen, .presentation-mode) .platform-ppt-stage {
  flex: 1;
  width: 100%;
  aspect-ratio: auto;
  min-height: 0;
  background: #10151a;
}
.courseos-app .platform-ppt-player:is(:fullscreen, .presentation-mode) .platform-ppt-toolbar {
  flex: none;
  justify-content: center;
  border: 0;
  background: #171d29;
}
.courseos-app .platform-ppt-player:is(:fullscreen, .presentation-mode) .platform-ppt-toolbar button {
  border-color: rgba(255, 255, 255, .25);
  background: rgba(255, 255, 255, .08);
  color: #fff;
}
.courseos-app .platform-ppt-player:is(:fullscreen, .presentation-mode) .platform-ppt-page { color: #fff; }

@media (max-width: 700px) {
  .courseos-app .platform-lesson-preview { padding: 4px; }
  .courseos-app .platform-lesson-preview-dialog {
    width: 100%;
    height: calc(100dvh - 8px);
    border-radius: 4px;
  }
  .courseos-app .platform-lesson-preview-head { min-height: 56px; padding: 10px 12px; }
  .courseos-app .platform-lesson-preview-body { padding: 12px; }
  .courseos-app .platform-lesson-preview-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 0 12px;
  }
  .courseos-app .platform-lesson-preview-tab { min-height: 42px; font-size: 12px; }
  .courseos-app .platform-knowledge-grid { grid-template-columns: 1fr; padding: 15px; }
  .courseos-app .platform-ppt-shell {
    height: auto;
    padding-right: 0;
  }
  .courseos-app .platform-ppt-player { min-height: 0; }
  .courseos-app .platform-ppt-stage { min-height: 0; }
  .courseos-app .platform-ppt-pages {
    position: static;
    width: 100%;
    height: 154px;
    margin-top: 10px;
  }
  .courseos-app .platform-ppt-page-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 9px;
  }
  .courseos-app .platform-ppt-page-thumb {
    flex: 0 0 130px;
    width: 130px;
    margin: 0;
  }
}

.courseos-app .preview-modal {
  z-index: 220;
  padding: 16px !important;
  background: rgba(22, 31, 51, .66);
}
.courseos-app .preview-window {
  width: min(1480px, calc(100vw - 32px)) !important;
  height: min(1040px, calc(100dvh - 32px)) !important;
  grid-template-rows: 68px minmax(0, 1fr);
  border: 1px solid var(--v2-line);
  border-radius: 6px !important;
  box-shadow: 0 24px 72px rgba(22, 31, 51, .24);
}
.courseos-app .preview-window-head {
  min-width: 0;
  padding: 0 24px;
  border-color: var(--v2-line);
}
.courseos-app .preview-window-head b {
  display: block;
  margin-top: 3px;
  color: var(--v2-ink);
  font-size: 16px;
}
.courseos-app .preview-window-head small {
  margin: 0;
  color: var(--v2-muted);
  font-size: 11px;
}
.courseos-app .preview-close {
  flex: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--v2-line);
  border-radius: 4px;
  background: #fff;
  font-size: 20px;
}
.courseos-app .preview-close:hover {
  color: var(--v2-primary);
  background: var(--v2-primary-soft);
}
.courseos-app .preview-stage {
  min-width: 0;
  padding: 0 30px 36px;
  background: #fff;
  color: var(--v2-ink);
}
.courseos-app .preview-stage #stageCanvas,
.courseos-app .course-preview-path {
  width: min(100%, 1280px);
  margin-inline: auto;
}
.courseos-app .course-preview-path {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  overflow-x: auto;
  border-bottom: 1px solid var(--v2-line);
  background: #fff;
  white-space: nowrap;
  color: var(--v2-muted);
  font-size: 12px;
}
.courseos-app .course-preview-path button {
  flex: none;
  padding: 8px 0;
  color: var(--v2-primary-dark);
  font-weight: 600;
}
.courseos-app .course-preview-path b { color: var(--v2-ink); }
.courseos-app .course-preview-intro {
  display: grid;
  grid-template-columns: minmax(190px, 280px) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--v2-line);
}
.courseos-app .course-preview-intro .course-preview-cover {
  width: 100%;
  aspect-ratio: 4 / 3;
}
.courseos-app .course-preview-kicker {
  color: var(--v2-primary-dark);
  font-size: 11px;
  font-weight: 700;
}
.courseos-app .course-preview-intro h2,
.courseos-app .course-preview-heading-main h2 {
  margin: 8px 0;
  color: var(--v2-ink);
  font-size: 24px;
  line-height: 1.25;
}
.courseos-app .course-preview-intro p,
.courseos-app .course-preview-heading-main p {
  max-width: 780px;
  margin: 0;
  color: var(--v2-muted);
  font-size: 13px;
  line-height: 1.7;
}
.courseos-app .course-preview-facts {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.courseos-app .course-preview-facts span {
  padding: 7px 10px;
  border: 1px solid var(--v2-line);
  border-radius: 4px;
  color: var(--v2-ink);
  font-size: 12px;
}
.courseos-app .course-preview-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin: 26px 0 14px;
}
.courseos-app .course-preview-heading h3 {
  margin: 0;
  font-size: 16px;
}
.courseos-app .course-preview-heading > span {
  color: var(--v2-muted);
  font-size: 12px;
}
.courseos-app .course-preview-heading-main {
  align-items: flex-end;
  margin: 30px 0 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--v2-line);
}
.courseos-app .course-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.courseos-app .course-preview-lessons {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.courseos-app .course-preview-item {
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--v2-line);
  border-radius: 6px;
  background: #fff;
  text-align: left;
  transition: border-color .15s, box-shadow .15s;
}
.courseos-app .course-preview-item:hover,
.courseos-app .course-preview-item:focus-visible {
  border-color: var(--v2-primary);
  box-shadow: 0 5px 18px rgba(61, 120, 245, .11);
  outline: none;
}
.courseos-app .course-preview-cover {
  position: relative;
  display: grid;
  width: 100%;
  aspect-ratio: 16 / 9;
  place-items: center;
  overflow: hidden;
  background: #eaf1fb;
  color: var(--v2-primary-dark);
  font-size: 30px;
  font-weight: 700;
}
.courseos-app .course-preview-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.courseos-app .course-preview-item-copy {
  display: flex;
  min-width: 0;
  flex: 1;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
}
.courseos-app .course-preview-item-copy small {
  color: var(--v2-primary-dark);
  font-size: 10px;
  font-weight: 700;
}
.courseos-app .course-preview-item-copy b {
  color: var(--v2-ink);
  font-size: 15px;
  line-height: 1.35;
  overflow-wrap: anywhere;
}
.courseos-app .course-preview-item-copy > span {
  color: var(--v2-muted);
  font-size: 12px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.courseos-app .course-preview-item-copy em {
  margin-top: auto;
  padding-top: 8px;
  color: var(--v2-primary-dark);
  font-size: 11px;
  font-style: normal;
  font-weight: 700;
}
.courseos-app .course-preview-levels {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
}
.courseos-app .course-preview-levels button {
  flex: none;
  padding: 10px 14px;
  border: 1px solid var(--v2-line);
  border-radius: 4px;
  background: #fff;
  color: var(--v2-muted);
  font-size: 12px;
}
.courseos-app .course-preview-levels button.active,
.courseos-app .course-preview-levels button:hover {
  border-color: var(--v2-primary);
  background: var(--v2-primary-soft);
  color: var(--v2-primary-dark);
}
@media (max-width: 900px) {
  .courseos-app .course-preview-grid,
  .courseos-app .course-preview-lessons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  .courseos-app .preview-modal { padding: 0 !important; }
  .courseos-app .preview-window {
    width: 100vw !important;
    height: 100dvh !important;
    border: 0;
    border-radius: 0 !important;
  }
  .courseos-app .preview-window-head { padding: 0 16px; }
  .courseos-app .preview-stage { padding: 0 16px 26px; }
  .courseos-app .course-preview-intro { grid-template-columns: 1fr; gap: 14px; padding: 18px 0; }
  .courseos-app .course-preview-intro .course-preview-cover { aspect-ratio: 16 / 9; }
  .courseos-app .course-preview-heading { display: block; }
  .courseos-app .course-preview-heading > span { display: block; margin-top: 5px; }
  .courseos-app .course-preview-grid,
  .courseos-app .course-preview-lessons { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .courseos-app .lesson-studio { padding: 0; }
  .courseos-app .lesson-studio-dialog { width: 100%; height: 100dvh; max-height: none; border-radius: 0; }
  .courseos-app .lesson-studio-main { padding: 14px; }
  .courseos-app .lesson-studio-head { flex-wrap: wrap; gap: 10px; }
  .courseos-app .lesson-studio-head-actions { margin-left: auto; }
  .courseos-app .studio-main-feature { grid-template-columns: 1fr; }
  .courseos-app .studio-feature-cover { min-height: 165px; }
  .courseos-app .studio-feature-copy { padding: 16px; }
  .courseos-app .studio-feature-copy h3 { font-size: 15px; }
  .courseos-app .studio-library-grid { grid-template-columns: 1fr; }
  .courseos-app .studio-library-item { grid-template-columns: 42px minmax(0, 1fr); gap: 8px 10px; }
  .courseos-app .studio-library-icon { width: 42px; height: 42px; }
  .courseos-app .studio-library-actions { grid-column: 2; justify-content: flex-start; gap: 6px; }
  .courseos-app .studio-library-item button { min-height: 38px; }
}

.courseos-app .ai-ops-page {
  max-width: 1380px;
  margin: 0 auto;
  color: #24363b;
}
.courseos-app .ai-ops-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 0 0 20px;
  border-bottom: 1px solid #dce6e3;
}
.courseos-app .ai-ops-header h1 { margin: 0; font-size: 25px; line-height: 1.3; }
.courseos-app .ai-ops-header p { margin: 7px 0 0; color: #62777b; font-size: 12px; }
.courseos-app .ai-ops-product { display: grid; gap: 5px; width: min(310px, 100%); flex: none; }
.courseos-app .ai-ops-product label,
.courseos-app .ai-ops-refine label { color: #58706f; font-size: 11px; font-weight: 700; }
.courseos-app .ai-ops-product select {
  width: 100%;
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid #cbdad6;
  border-radius: 4px;
  background: #fff;
  color: #273e43;
  font-size: 12px;
}
.courseos-app .ai-ops-product > span { color: #637a78; font-size: 10px; }
.courseos-app .ai-ops-error {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  padding: 11px 14px;
  border: 1px solid #e4c6ba;
  border-radius: 4px;
  background: #fff5f0;
  color: #8e4634;
  font-size: 12px;
}
.courseos-app .ai-ops-error[hidden] { display: none; }
.courseos-app .ai-ops-error button { flex: none; }
.courseos-app .ai-ops-roles {
  display: flex;
  gap: 4px;
  margin: 18px 0 12px;
  border-bottom: 1px solid #dce6e3;
}
.courseos-app .ai-ops-roles button {
  min-width: 86px;
  padding: 9px 14px;
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: #62777b;
  font-size: 13px;
  font-weight: 700;
}
.courseos-app .ai-ops-roles button.active { border-color: #087f78; color: #086e69; }
.courseos-app .ai-ops-tasks {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  min-height: 78px;
  margin-bottom: 20px;
}
.courseos-app .ai-ops-tasks button {
  min-width: 0;
  min-height: 76px;
  padding: 12px;
  border: 1px solid #d5e2de;
  border-radius: 5px;
  background: #fff;
  text-align: left;
}
.courseos-app .ai-ops-tasks button:hover { border-color: #56a99f; }
.courseos-app .ai-ops-tasks button.active {
  border-color: #087f78;
  background: #eaf6f2;
  box-shadow: inset 3px 0 #087f78;
}
.courseos-app .ai-ops-tasks b,
.courseos-app .ai-ops-tasks span { display: block; overflow-wrap: anywhere; }
.courseos-app .ai-ops-tasks b { color: #203d40; font-size: 13px; }
.courseos-app .ai-ops-tasks span { margin-top: 5px; color: #6e8082; font-size: 10px; line-height: 1.5; }
.courseos-app .ai-ops-main {
  display: grid;
  grid-template-columns: minmax(290px, 0.85fr) minmax(0, 1.15fr);
  gap: 20px;
  align-items: start;
}
.courseos-app .ai-ops-brief,
.courseos-app .ai-ops-result { min-width: 0; }
.courseos-app .ai-ops-result { padding-left: 20px; border-left: 1px solid #dce6e3; }
.courseos-app .ai-ops-section-head { margin: 0 0 16px; }
.courseos-app .ai-ops-section-head > span { color: #087f78; font-size: 10px; font-weight: 700; }
.courseos-app .ai-ops-section-head h2 { margin: 5px 0 3px; font-size: 17px; }
.courseos-app .ai-ops-section-head p { margin: 0; color: #758589; font-size: 11px; line-height: 1.6; }
.courseos-app [data-ai-task-form] { display: grid; gap: 11px; }
.courseos-app [data-ai-task-form] label { display: grid; gap: 5px; color: #40575b; font-size: 12px; font-weight: 700; }
.courseos-app [data-ai-task-form] input,
.courseos-app [data-ai-task-form] select,
.courseos-app [data-ai-task-form] textarea,
.courseos-app .ai-ops-refine textarea {
  width: 100%;
  min-width: 0;
  padding: 10px 11px;
  border: 1px solid #cbdad6;
  border-radius: 4px;
  outline: 0;
  background: #fff;
  color: #23383d;
  font: inherit;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.55;
  resize: vertical;
}
.courseos-app [data-ai-task-form] input:focus,
.courseos-app [data-ai-task-form] textarea:focus,
.courseos-app .ai-ops-refine textarea:focus { border-color: #087f78; outline: 2px solid #caeae1; }
.courseos-app [data-ai-task-submit] { min-height: 40px; justify-self: start; padding: 9px 20px; }
.courseos-app .ai-ops-evidence { margin-top: 19px; padding: 12px 0; border-top: 1px solid #dce6e3; }
.courseos-app .ai-ops-evidence b { color: #214b49; font-size: 12px; }
.courseos-app .ai-ops-evidence p { margin: 5px 0 0; color: #62777b; font-size: 11px; line-height: 1.65; overflow-wrap: anywhere; }
.courseos-app .ai-ops-result .ai-message-list {
  min-height: 310px;
  max-height: 480px;
  padding: 0;
  border: 1px solid #dce6e3;
  border-radius: 4px;
  background: #fff;
}
.courseos-app .ai-ops-result-actions { float: right; display: flex; flex-wrap: wrap; gap: 6px; }
.courseos-app .ai-ops-result-actions button { padding: 6px 10px; font-size: 11px; }
.courseos-app .ai-ops-result-actions button:disabled { opacity: 0.45; cursor: not-allowed; }
.courseos-app .ai-result-empty { display: grid; gap: 7px; place-content: center; min-height: 310px; padding: 22px; text-align: center; }
.courseos-app .ai-result-empty b { font-size: 14px; }
.courseos-app .ai-result-empty span { max-width: 350px; color: #728487; font-size: 11px; line-height: 1.7; }
.courseos-app .ai-ops-result .ai-message { max-width: none; margin: 0; padding: 14px 18px; border-bottom: 1px solid #e2eae7; }
.courseos-app .ai-ops-result .ai-message:last-child { border-bottom: 0; }
.courseos-app .ai-ops-result .ai-message-meta { margin: 0 0 8px; color: #087f78; font-size: 10px; font-weight: 700; text-align: left; }
.courseos-app .ai-ops-result .ai-message-bubble {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: #263b3e;
  font-size: 12px;
  line-height: 1.8;
  white-space: pre-wrap;
}
.courseos-app .ai-ops-result .ai-message-request { background: #f6f9f8; }
.courseos-app .ai-message-request summary { cursor: pointer; color: #607578; font-size: 11px; font-weight: 700; }
.courseos-app .ai-message-request .ai-message-bubble { margin-top: 10px; color: #607578; font-size: 11px; }
.courseos-app .ai-ops-refine { display: grid; gap: 6px; margin-top: 13px; }
.courseos-app .ai-ops-refine > div { display: flex; align-items: flex-end; gap: 8px; }
.courseos-app .ai-ops-refine textarea { flex: 1; min-height: 58px; }
.courseos-app .ai-ops-refine button { flex: none; min-height: 40px; }
.courseos-app .ai-ops-execution { margin-top: 25px; border-top: 1px solid #dce6e3; }
.courseos-app .ai-ops-execution-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 16px 0 10px; }
.courseos-app .ai-ops-execution-head h2 { margin: 0; font-size: 16px; }
.courseos-app .ai-ops-execution-head p { margin: 4px 0 0; color: #758589; font-size: 11px; }
.courseos-app .ai-ops-execution-head > span { flex: none; color: #087f78; font-size: 11px; }
.courseos-app .ai-execution-empty { padding: 16px 0; color: #758589; font-size: 11px; }
.courseos-app .ai-execution-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 110px 145px 145px;
  align-items: start;
  gap: 12px;
  padding: 13px 0;
  border-top: 1px solid #e1e9e6;
}
.courseos-app .ai-execution-title { min-width: 0; }
.courseos-app .ai-execution-title b { display: block; overflow-wrap: anywhere; font-size: 12px; }
.courseos-app .ai-execution-title > span { display: block; margin-top: 5px; color: #758589; font-size: 10px; }
.courseos-app .ai-execution-title details { margin-top: 8px; font-size: 10px; }
.courseos-app .ai-execution-title summary { cursor: pointer; color: #087f78; }
.courseos-app .ai-execution-title p { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.65; color: #3a5255; }
.courseos-app .ai-execution-row label { display: grid; gap: 5px; color: #758589; font-size: 10px; }
.courseos-app .ai-execution-row select,
.courseos-app .ai-execution-row input { width: 100%; min-width: 0; min-height: 34px; padding: 6px; border: 1px solid #cbdad6; border-radius: 4px; background: #fff; color: #304a4d; font-size: 11px; }
.courseos-app .ai-ops-support { margin-top: 22px; border-top: 1px solid #dce6e3; }
.courseos-app .ai-ops-support summary { padding: 14px 0; color: #28474a; cursor: pointer; font-size: 13px; font-weight: 700; }
.courseos-app .ai-ops-support summary span { margin-left: 8px; color: #7c8e8f; font-size: 10px; font-weight: 400; }
.courseos-app .ai-ops-support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; padding-bottom: 18px; }
.courseos-app .ai-ops-support-grid section { min-width: 0; }
.courseos-app .ai-ops-support .ai-session-list { display: flex; gap: 6px; overflow: auto; padding: 5px 0; }
.courseos-app .ai-ops-support .ai-session-item { flex: 0 0 170px; border-color: #dce6e3; border-radius: 4px; }
.courseos-app .ai-ops-support .ai-chat-actions { margin-top: 8px; }
.courseos-app .ai-ops-support .ai-asset-list { max-height: 210px; overflow: auto; }
.courseos-app .ai-ops-page button:focus-visible { outline: 2px solid #087f78; outline-offset: 2px; }

@media (max-width: 950px) {
  .courseos-app .ai-ops-tasks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .courseos-app .ai-ops-main { grid-template-columns: 1fr; }
  .courseos-app .ai-ops-result { padding: 18px 0 0; border-left: 0; border-top: 1px solid #dce6e3; }
  .courseos-app .ai-execution-row { grid-template-columns: minmax(0, 1fr) repeat(3, minmax(95px, 1fr)); }
}
@media (max-width: 600px) {
  .courseos-app .ai-ops-header { display: block; }
  .courseos-app .ai-ops-header h1 { font-size: 21px; }
  .courseos-app .ai-ops-product { margin-top: 16px; }
  .courseos-app .ai-ops-roles { overflow-x: auto; }
  .courseos-app .ai-ops-roles button { flex: 1; min-width: 70px; padding: 9px 6px; }
  .courseos-app .ai-ops-tasks button { min-height: 88px; }
  .courseos-app .ai-ops-support-grid { grid-template-columns: 1fr; }
  .courseos-app .ai-ops-support summary span { display: block; margin: 3px 0 0; }
  .courseos-app .ai-ops-result-actions { float: none; margin: 8px 0; }
  .courseos-app .ai-execution-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .courseos-app .ai-execution-title { grid-column: 1 / -1; }
}

.courseos-app .ai-ops-page { max-width: 1500px; min-width: 0; }
.courseos-app .ai-ops-header {
  display: flex;
  align-items: center;
  padding: 0 0 16px;
  margin-bottom: 14px;
  border-color: #dce5e1;
}
.courseos-app .ai-ops-header h1 { font-size: 23px; }
.courseos-app .ai-ops-header p { margin-top: 4px; font-size: 12px; }
.courseos-app .ai-agent-connection { flex: none; color: #4c8171; font-size: 11px; }
.courseos-app .ai-agent-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  height: clamp(620px, calc(100dvh - 200px), 970px);
  min-height: 0;
  overflow: hidden;
  border: 1px solid #dbe5e1;
  border-radius: 6px;
  background: #fff;
}
.courseos-app .ai-agent-layout.panel-closed { grid-template-columns: minmax(0, 1fr); }
.courseos-app .ai-agent-layout.panel-closed .ai-agent-side { display: none; }
.courseos-app .ai-agent-conversation { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.courseos-app .ai-agent-conversation-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 22px;
  border-bottom: 1px solid #e7eeea;
}
.courseos-app .ai-agent-conversation-head > div:first-child { min-width: 0; }
.courseos-app .ai-agent-conversation-head small { color: #659486; font-size: 10px; font-weight: 700; }
.courseos-app .ai-agent-conversation-head h2 {
  margin: 3px 0;
  overflow: hidden;
  color: #263b3b;
  font-size: 16px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.courseos-app .ai-agent-conversation-head p { margin: 0; color: #718284; font-size: 11px; }
.courseos-app .ai-agent-conversation-actions { display: flex; flex: none; gap: 6px; }
.courseos-app .ai-agent-conversation-actions button { min-height: 34px; padding: 7px 10px; font-size: 11px; }
.courseos-app .ai-agent-conversation-actions button:disabled { opacity: .45; }
.courseos-app .ai-agent-conversation .ai-message-list {
  flex: 1;
  min-height: 0;
  max-height: none;
  overflow: auto;
  padding: 22px max(22px, calc((100% - 820px) / 2));
  background: #f8faf9;
}
.courseos-app .ai-agent-conversation .ai-message {
  width: fit-content;
  max-width: min(88%, 680px);
  margin: 0 0 19px;
  padding: 0;
  border: 0;
  background: transparent;
}
.courseos-app .ai-agent-conversation .ai-message-request { margin-left: auto; }
.courseos-app .ai-agent-conversation .ai-message-meta {
  margin: 0 2px 6px;
  color: #718583;
  font-size: 10px;
  font-weight: 600;
}
.courseos-app .ai-agent-conversation .ai-message-request .ai-message-meta { text-align: right; }
.courseos-app .ai-agent-conversation .ai-message-bubble {
  padding: 13px 16px;
  border: 1px solid #dbe6e2;
  border-radius: 6px;
  background: #fff;
  color: #263a3e;
  font-size: 13px;
  line-height: 1.75;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}
.courseos-app .ai-agent-conversation .ai-message-request .ai-message-bubble {
  border-color: #ccdef0;
  background: #e9f2fd;
  color: #254269;
}
.courseos-app .ai-agent-conversation .ai-message-request details { white-space: normal; }
.courseos-app .ai-agent-conversation .ai-message-request summary { color: inherit; font-size: 13px; }
.courseos-app .ai-agent-conversation .ai-message-request details p { margin: 12px 0 0; white-space: pre-wrap; }
.courseos-app .ai-agent-welcome { max-width: 620px; margin: auto; padding: 28px; text-align: center; }
.courseos-app .ai-agent-welcome > span { color: #328873; font-size: 12px; font-weight: 700; }
.courseos-app .ai-agent-welcome h3 { margin: 9px 0; color: #22383b; font-size: 23px; }
.courseos-app .ai-agent-welcome p { margin: 0; color: #6b7e80; font-size: 13px; line-height: 1.7; }
.courseos-app .ai-agent-suggestions { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 24px; }
.courseos-app .ai-agent-suggestions button {
  padding: 9px 12px;
  border: 1px solid #cbdcd4;
  border-radius: 5px;
  background: #fff;
  color: #246f60;
  font-size: 12px;
}
.courseos-app .ai-agent-pending { color: #587c73; font-size: 12px; }
.courseos-app .ai-agent-conversation .ai-ops-refine {
  display: block;
  margin: 0;
  padding: 16px 22px 18px;
  border-top: 1px solid #dfe9e5;
  background: #fff;
}
.courseos-app .ai-agent-input-label { display: block; margin-bottom: 8px; color: #4b6b6d; font-size: 11px; font-weight: 700; }
.courseos-app .ai-agent-conversation .ai-ops-refine > div { display: flex; align-items: flex-end; gap: 9px; }
.courseos-app .ai-agent-conversation .ai-ops-refine textarea {
  flex: 1;
  min-height: 70px;
  max-height: 180px;
  border-radius: 5px;
  font-size: 13px;
}
.courseos-app .ai-agent-conversation .ai-ops-refine button { min-height: 40px; }
.courseos-app .ai-agent-side {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  padding: 16px;
  border-left: 1px solid #dfe8e4;
  background: #f8faf9;
}
.courseos-app .ai-agent-side-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.courseos-app .ai-agent-side-head h3,
.courseos-app .ai-agent-side-section h3 { margin: 0; color: #254044; font-size: 13px; }
.courseos-app .ai-agent-side-head > div { display: flex; gap: 5px; }
.courseos-app .ai-agent-icon-button {
  width: 30px;
  height: 30px;
  border: 1px solid #d2e0db;
  border-radius: 4px;
  background: #fff;
  color: #327b6d;
  font-size: 18px;
}
.courseos-app .ai-agent-side .ai-session-list { display: grid; gap: 3px; max-height: 235px; overflow: auto; margin: 12px 0 8px; }
.courseos-app .ai-agent-side .ai-session-item { padding: 9px 10px; border-radius: 4px; }
.courseos-app .ai-agent-side .ai-session-item.active { border-color: #b7d9ca; background: #e8f4ee; }
.courseos-app .ai-agent-side .ai-session-item b { font-size: 12px; }
.courseos-app .ai-agent-side .ai-session-item span { font-size: 10px; }
.courseos-app .ai-agent-session-actions { display: flex; gap: 12px; }
.courseos-app .ai-agent-session-actions button {
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: #5b7776;
  font-size: 11px;
}
.courseos-app .ai-agent-session-actions button:disabled { opacity: .4; }
.courseos-app .ai-agent-side-section { margin-top: 18px; padding-top: 16px; border-top: 1px solid #dce6e1; }
.courseos-app .ai-agent-side-section > label { display: block; margin: 12px 0 6px; color: #607878; font-size: 11px; }
.courseos-app .ai-agent-side-section > select { width: 100%; min-height: 36px; border: 1px solid #cbdad6; border-radius: 4px; background: #fff; color: #283c3f; font-size: 12px; }
.courseos-app .ai-agent-side-section > p { margin: 8px 0 0; color: #6f8281; font-size: 11px; line-height: 1.6; }
.courseos-app .ai-agent-side .ai-ops-roles { display: flex; margin: 10px 0; gap: 0; border: 1px solid #d8e4df; border-radius: 4px; overflow: hidden; }
.courseos-app .ai-agent-side .ai-ops-roles button { flex: 1; min-width: 0; padding: 8px 2px; border: 0; border-right: 1px solid #d8e4df; background: #fff; font-size: 11px; }
.courseos-app .ai-agent-side .ai-ops-roles button:last-child { border-right: 0; }
.courseos-app .ai-agent-side .ai-ops-roles button.active { background: #dff0e8; color: #196f5a; }
.courseos-app .ai-agent-side .ai-ops-tasks { display: grid; grid-template-columns: 1fr; gap: 0; min-height: 0; margin: 0; }
.courseos-app .ai-agent-side .ai-ops-tasks button {
  min-height: 0;
  padding: 9px 4px;
  border: 0;
  border-bottom: 1px solid #e1eae6;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}
.courseos-app .ai-agent-side .ai-ops-tasks button.active { color: #157b63; }
.courseos-app .ai-agent-side .ai-ops-tasks button b { font-size: 12px; }
.courseos-app .ai-agent-side .ai-ops-tasks button span { margin-top: 2px; font-size: 10px; }
.courseos-app .ai-agent-tool-panel { margin-top: 12px; padding-top: 10px; border-top: 1px solid #dce6e1; }
.courseos-app .ai-agent-tool-panel[hidden] { display: none; }
.courseos-app .ai-agent-tool-head { display: flex; justify-content: space-between; gap: 6px; margin-bottom: 12px; }
.courseos-app .ai-agent-tool-head b { color: #254044; font-size: 13px; }
.courseos-app .ai-agent-tool-head p { margin: 4px 0 0; color: #70817f; font-size: 10px; line-height: 1.5; }
.courseos-app .ai-agent-tool-head button { align-self: flex-start; border: 0; background: transparent; color: #617b7a; font-size: 20px; }
.courseos-app .ai-agent-tool-panel form { gap: 9px; }
.courseos-app .ai-agent-tool-panel form label { font-size: 11px; }
.courseos-app .ai-agent-tool-panel form button { width: 100%; }
.courseos-app .ai-agent-details summary { display: flex; justify-content: space-between; color: #254044; font-size: 13px; font-weight: 700; cursor: pointer; }
.courseos-app .ai-agent-details summary span { color: #708681; font-size: 11px; font-weight: 400; }
.courseos-app .ai-agent-details .ai-asset-list,
.courseos-app .ai-agent-details [data-ai-deliverables] { max-height: 260px; overflow: auto; margin-top: 10px; }
.courseos-app .ai-agent-details .ai-execution-row { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.courseos-app .ai-agent-details .ai-execution-title { grid-column: 1 / -1; }
.courseos-app .ai-agent-details .ai-execution-row label:last-child { grid-column: 1 / -1; }
@media (max-width: 900px) {
  .courseos-app .ai-agent-layout { grid-template-columns: minmax(0, 1fr) 270px; }
}
@media (max-width: 760px) {
  .courseos-app .ai-agent-layout { position: relative; display: block; height: max(560px, calc(100dvh - 166px)); overflow: hidden; }
  .courseos-app .ai-agent-conversation { height: 100%; }
  .courseos-app .ai-agent-side {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 320;
    width: min(350px, 100%);
    height: 100%;
    box-shadow: -18px 0 35px #24393624;
  }
  .courseos-app .ai-agent-layout.panel-closed .ai-agent-side { display: none; }
  .courseos-app .ai-agent-conversation-head { align-items: flex-start; padding: 12px; }
  .courseos-app .ai-agent-conversation-actions { flex-wrap: wrap; justify-content: flex-end; }
  .courseos-app .ai-agent-conversation-actions button { padding: 6px; font-size: 10px; }
  .courseos-app .ai-agent-conversation .ai-message-list { padding: 18px 12px; }
  .courseos-app .ai-agent-conversation .ai-message { max-width: 96%; }
  .courseos-app .ai-agent-conversation .ai-ops-refine { padding: 12px; }
  .courseos-app .ai-agent-conversation .ai-ops-refine textarea { min-height: 60px; }
  .courseos-app .ai-agent-welcome { padding: 16px 8px; }
  .courseos-app .ai-agent-welcome h3 { font-size: 19px; }
}
.courseos-app #instClass .classroom-screen { background: #fff !important; color: #24343b; }
.courseos-app .institution-lesson-hub { padding: 20px 0 0; }
.courseos-app .institution-lesson-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.courseos-app .institution-lesson-heading h2 { margin: 0 0 8px; font-size: 24px; letter-spacing: 0; overflow-wrap: anywhere; }
.courseos-app .institution-lesson-heading p { margin: 0; color: #68777d; font-size: 13px; }
.courseos-app .institution-lesson-heading button { flex-shrink: 0; }
.courseos-app .institution-main-courseware { display: grid; grid-template-columns: minmax(0, 2fr) minmax(180px, 1fr); gap: 24px; align-items: center; padding-bottom: 24px; }
.courseos-app .institution-main-courseware img, .courseos-app .institution-courseware-empty { width: 100%; aspect-ratio: 16 / 9; object-fit: contain; background: #f3f6f5; border-radius: 6px; }
.courseos-app .institution-courseware-empty { display: grid; place-items: center; color: #68777d; }
.courseos-app .institution-main-courseware h3 { font-size: 14px; margin: 0 0 8px; }
.courseos-app .institution-main-courseware b { display: block; font-size: 16px; margin-bottom: 20px; overflow-wrap: anywhere; }
.courseos-app .institution-lesson-sections { display: flex; flex-wrap: wrap; gap: 12px; border-top: 1px solid #e2e9e5; padding-top: 18px; }
.courseos-app .institution-lesson-sections button { font-size: 14px; }
.courseos-app .institution-lesson-sections span { margin-left: 8px; color: #68777d; }
.courseos-app #instClass button:disabled { opacity: .45; cursor: not-allowed; }
@media (max-width: 760px) {
  .courseos-app .institution-lesson-heading { flex-wrap: wrap; }
  .courseos-app .institution-main-courseware { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .courseos-app .institution-lesson-sections { gap: 8px; }
}