/*
 * CourseOS system UI
 * One visual contract for the platform, institution, preview, training and
 * classroom workspaces. Feature styles may define layout, but they do not
 * define a second visual language.
 */
:root {
  --cos-primary: #3f7bf3;
  --cos-primary-strong: #2f63d6;
  --cos-primary-soft: #eaf1ff;
  --cos-success: #2ba77d;
  --cos-success-soft: #e9f8f2;
  --cos-accent: #f39a68;
  --cos-accent-soft: #fff2ea;
  --cos-danger: #d95f70;
  --cos-canvas: #f4f7fb;
  --cos-surface: #ffffff;
  --cos-surface-soft: #f8faff;
  --cos-ink: #1e293b;
  --cos-ink-soft: #405069;
  --cos-muted: #7b879b;
  --cos-muted-soft: #a2aec0;
  --cos-line: #e2e8f2;
  --cos-line-strong: #d1dbea;
  --cos-radius: 12px;
  --cos-radius-sm: 9px;
  --cos-shadow-sm: 0 2px 10px rgba(30, 52, 88, .05);
  --cos-shadow: 0 12px 30px rgba(30, 52, 88, .08);
  --cos-shadow-lg: 0 24px 70px rgba(17, 34, 64, .18);
}

body.courseos-app {
  background: var(--cos-canvas);
  color: var(--cos-ink);
  font-family: "Noto Sans SC", "Manrope", "Microsoft YaHei", "Segoe UI", sans-serif;
}

.courseos-app,
.courseos-app * {
  letter-spacing: 0;
}

.courseos-app .app {
  grid-template-columns: 244px minmax(0, 1fr);
  min-height: 100vh;
  background: var(--cos-canvas);
}

.courseos-app .sidebar,
.courseos-app .institution-side {
  background: var(--cos-surface);
  border-color: var(--cos-line);
}

.courseos-app .sidebar {
  padding: 20px 14px 14px;
}

.courseos-app .brand,
.courseos-app .institution-logo {
  padding: 0 10px 24px;
}

.courseos-app .brand-mark,
.courseos-app .institution-logo .brand-mark {
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 11px;
  background: var(--cos-primary);
  color: #fff;
  transform: none;
  box-shadow: 0 7px 16px rgba(63, 123, 243, .22);
}

.courseos-app .brand b,
.courseos-app .institution-logo b {
  color: var(--cos-ink);
  font-size: 17px;
}

.courseos-app .brand small,
.courseos-app .institution-logo small,
.courseos-app .section-label,
.courseos-app .institution-nav-label {
  color: var(--cos-muted-soft);
}

.courseos-app .section-label,
.courseos-app .institution-nav-label {
  padding: 13px 12px 6px;
  font-size: 10px;
  letter-spacing: .04em;
}

.courseos-app .nav {
  gap: 3px;
}

.courseos-app .nav button,
.courseos-app .institution-nav {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--cos-ink-soft);
  transition: background .16s ease, border-color .16s ease, color .16s ease,
    box-shadow .16s ease;
}

.courseos-app .nav button {
  padding: 9px 12px;
}

.courseos-app .institution-nav {
  padding: 10px 12px;
}

.courseos-app .nav button:hover,
.courseos-app .institution-nav:hover {
  background: var(--cos-primary-soft);
  border-color: #d9e5ff;
  color: var(--cos-primary);
}

.courseos-app .nav button.active,
.courseos-app .institution-nav.active {
  background: var(--cos-primary);
  border-color: var(--cos-primary);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 7px 16px rgba(63, 123, 243, .18);
}

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

.courseos-app .side-bottom,
.courseos-app .institution-side {
  border-color: var(--cos-line);
}

.courseos-app .preview-institution {
  min-height: 40px;
  border: 1px solid #d9e5ff;
  border-radius: 10px;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

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

.courseos-app .main,
.courseos-app .institution-main {
  min-width: 0;
  background: var(--cos-canvas);
}

.courseos-app .topbar,
.courseos-app .institution-top {
  min-height: 72px;
  height: 72px;
  background: rgba(255, 255, 255, .96);
  border-color: var(--cos-line);
  box-shadow: 0 1px 0 rgba(63, 123, 243, .03);
  backdrop-filter: blur(12px);
}

.courseos-app .topbar {
  padding: 0 32px;
}

.courseos-app .institution-top {
  padding: 0 34px;
}

.courseos-app .crumb,
.courseos-app .top-kicker {
  color: var(--cos-muted);
}

.courseos-app .crumb strong,
.courseos-app .institution-top h1 {
  color: var(--cos-ink);
}

.courseos-app .top-icon {
  border-color: var(--cos-line);
  border-radius: 10px;
  background: var(--cos-surface);
  color: var(--cos-muted);
}

.courseos-app .content,
.courseos-app .institution-content {
  width: min(100%, 1560px);
  max-width: 1560px;
  padding: 30px 34px 56px;
}

.courseos-app .institution-content {
  max-width: 1440px;
}

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

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

.courseos-app .eyebrow,
.courseos-app .top-kicker,
.courseos-app .stage-kicker {
  color: var(--cos-primary);
}

.courseos-app button,
.courseos-app input,
.courseos-app select,
.courseos-app textarea {
  font-family: inherit;
}

.courseos-app button {
  cursor: pointer;
}

.courseos-app button:focus-visible,
.courseos-app input:focus-visible,
.courseos-app select:focus-visible,
.courseos-app textarea:focus-visible,
.courseos-app a:focus-visible {
  outline: 3px solid rgba(63, 123, 243, .22);
  outline-offset: 2px;
}

.courseos-app .primary,
.courseos-app .inst-primary,
.courseos-app .courseos-wb-button.primary,
.courseos-app .ai-agent-send {
  border: 1px solid var(--cos-primary);
  border-radius: 10px;
  background: var(--cos-primary);
  color: #fff;
  box-shadow: 0 7px 16px rgba(63, 123, 243, .16);
}

.courseos-app .primary:hover,
.courseos-app .inst-primary:hover,
.courseos-app .courseos-wb-button.primary:hover,
.courseos-app .ai-agent-send:hover {
  background: var(--cos-primary-strong);
  border-color: var(--cos-primary-strong);
  color: #fff;
  transform: translateY(-1px);
}

.courseos-app .ghost,
.courseos-app .inst-ghost,
.courseos-app .courseos-wb-button,
.courseos-app .explorer-back,
.courseos-app .org-modal-close {
  border: 1px solid var(--cos-line-strong);
  border-radius: 10px;
  background: var(--cos-surface);
  color: var(--cos-ink-soft);
  box-shadow: none;
}

.courseos-app .ghost:hover,
.courseos-app .inst-ghost:hover,
.courseos-app .courseos-wb-button:hover,
.courseos-app .explorer-back:hover {
  border-color: #b9cdf5;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

.courseos-app .panel,
.courseos-app .stat,
.courseos-app .course-card,
.courseos-app .inst-panel,
.courseos-app .inst-metrics > div,
.courseos-app .homework-summary > div,
.courseos-app .homework-list,
.courseos-app .prep-board,
.courseos-app .material-card,
.courseos-app .product-large,
.courseos-app .product-overview-bar,
.courseos-app .overview-subject,
.courseos-app .hierarchy-column,
.courseos-app .builder-side,
.courseos-app .builder-main,
.courseos-app .builder-preview,
.courseos-app .training-card,
.courseos-app .institution-explorer-card,
.courseos-app .institution-lesson-card,
.courseos-app .institution-material-card,
.courseos-app .institution-prep-card {
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .panel-title,
.courseos-app .inst-panel-head {
  border-color: var(--cos-line);
}

.courseos-app .stat-mark,
.courseos-app .section-icon,
.courseos-app .training-number,
.courseos-app .prep-icon,
.courseos-app .class-icon,
.courseos-app .platform-preview-asset-icon,
.courseos-app .platform-asset-viewer-icon {
  border-radius: 9px;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

.courseos-app .badge,
.courseos-app .institution-online-tag {
  border-radius: 6px;
  background: var(--cos-success-soft);
  color: var(--cos-success);
}

.courseos-app .badge.orange,
.courseos-app .warning,
.courseos-app .institution-material-pending {
  background: var(--cos-accent-soft);
  color: #bd7047;
}

.courseos-app .toolbar .search input,
.courseos-app .search input,
.courseos-app select,
.courseos-app .global-search,
.courseos-app .inst-search,
.courseos-app .institution-global-search {
  border: 1px solid var(--cos-line);
  border-radius: 10px;
  background: var(--cos-surface);
  color: var(--cos-ink);
}

.courseos-app .toolbar .search input:focus,
.courseos-app .search input:focus,
.courseos-app .global-search:focus-within {
  border-color: #9ebaff;
  box-shadow: 0 0 0 4px rgba(63, 123, 243, .1);
}

.courseos-app .level-tab,
.courseos-app .product-tabs button,
.courseos-app .material-filter button,
.courseos-app .builder-tab {
  border-radius: 9px;
}

.courseos-app .level-tab.active,
.courseos-app .product-tabs button.active,
.courseos-app .material-filter button.active,
.courseos-app .builder-tab.active {
  background: var(--cos-primary);
  border-color: var(--cos-primary);
  color: #fff;
}

.courseos-app .cover,
.courseos-app .entity-cover,
.courseos-app .subsubject-cover,
.courseos-app .level-cover,
.courseos-app .institution-explorer-cover,
.courseos-app .institution-lesson-cover,
.courseos-app .institution-unit-cover,
.courseos-app .institution-prep-cover,
.courseos-app .institution-material-cover {
  background-size: cover;
  background-position: center;
}

.courseos-app .course-card:hover,
.courseos-app .overview-subject:hover,
.courseos-app .product-large:hover,
.courseos-app .institution-explorer-card:hover {
  border-color: #b9cdf5;
  box-shadow: var(--cos-shadow);
  transform: translateY(-2px);
}

.courseos-app .product-large {
  color: #fff;
}

.courseos-app .product-large.art,
.courseos-app .product-large.music,
.courseos-app .product-large.code {
  background-position: center;
  background-size: cover;
}

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

.courseos-app .institution-side {
  padding: 20px 14px 14px;
}

.courseos-app .institution-user {
  border: 1px solid var(--cos-line);
  border-radius: 10px;
  background: var(--cos-surface-soft);
}

.courseos-app .institution-shell.visible {
  grid-template-columns: 244px minmax(0, 1fr);
}

.courseos-app .institution-nav i {
  border-radius: 6px;
  background: var(--cos-accent-soft);
  color: #bd7047;
}

/* Preview and dialog surfaces use the same shell as the main workspaces. */
.courseos-app .preview-modal,
.courseos-app .platform-lesson-preview,
.courseos-app .material-preview-dialog,
.courseos-app .platform-asset-viewer,
.courseos-app .entity-dialog,
.courseos-app .course-import-dialog,
.courseos-app .flow-modal,
.courseos-app .flow-dialog,
.courseos-app .live-admin-dialog,
.courseos-app .sales-demo-dialog,
.courseos-app .standalone-dialog,
.courseos-app .courseos-ai-dialog,
.courseos-app .institution-interaction-dialog,
.courseos-app .interaction-dialog,
.courseos-app .interaction-responses-dialog {
  background: rgba(17, 34, 64, .52);
}

.courseos-app .preview-window,
.courseos-app .platform-lesson-preview-dialog,
.courseos-app .platform-asset-viewer-dialog,
.courseos-app .material-preview-dialog,
.courseos-app .entity-dialog,
.courseos-app .course-import-dialog,
.courseos-app .flow-dialog,
.courseos-app .live-admin-dialog,
.courseos-app .sales-demo-dialog,
.courseos-app .standalone-dialog,
.courseos-app .courseos-ai-dialog,
.courseos-app .institution-interaction-dialog,
.courseos-app .interaction-dialog,
.courseos-app .interaction-responses-dialog {
  border: 1px solid var(--cos-line);
  border-radius: 16px;
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-lg);
}

/* Workspace navigation stays available while a lesson preview is open. */
.courseos-app .sidebar {
  position: relative;
  z-index: 300;
}

.courseos-app .topbar {
  position: sticky;
  z-index: 301;
}

.courseos-app .platform-lesson-preview {
  z-index: 240;
}

.courseos-app .preview-window-head,
.courseos-app .platform-lesson-preview-head,
.courseos-app .material-preview-head,
.courseos-app .entity-dialog-head,
.courseos-app .org-modal-head,
.courseos-app .interaction-dialog-head,
.courseos-app .release-dialog-head {
  border-color: var(--cos-line);
  background: var(--cos-surface);
}

.courseos-app .platform-lesson-preview-tabs,
.courseos-app .product-tabs,
.courseos-app .builder-tabs {
  border-color: var(--cos-line);
}

.courseos-app .platform-lesson-preview-tab {
  border-bottom: 2px solid transparent;
  color: var(--cos-muted);
}

.courseos-app .platform-lesson-preview-tab:hover,
.courseos-app .platform-lesson-preview-tab.active {
  border-color: var(--cos-primary);
  color: var(--cos-primary);
  background: var(--cos-primary-soft);
}

.courseos-app .platform-lesson-preview-body,
.courseos-app .preview-window-body {
  background: var(--cos-canvas);
}

.courseos-app .preview-stage-nav,
.courseos-app .preview-inspector,
.courseos-app .platform-preview-info,
.courseos-app .platform-preview-materials {
  border-color: var(--cos-line);
  background: var(--cos-surface-soft);
}

.courseos-app .stage-nav-button.active,
.courseos-app .stage-nav-button:hover {
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

.courseos-app .platform-preview-content-card,
.courseos-app .platform-preview-resource-card,
.courseos-app .platform-preview-asset,
.courseos-app .stage-lesson-card,
.courseos-app .content-preview-card {
  border-color: var(--cos-line);
  border-radius: 11px;
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .platform-preview-video,
.courseos-app .platform-preview-main-image,
.courseos-app .slide-preview,
.courseos-app .slide-stage {
  border-color: var(--cos-line);
  border-radius: 11px;
  background: var(--cos-surface);
}

/* Training, AI and live classroom stay inside the same product shell. */
.courseos-app .training-hero,
.courseos-app .courseos-wb-topbar,
.courseos-app .courseos-wb-stage-head,
.courseos-app .courseos-wb-transport,
.courseos-app .courseos-wb-right,
.courseos-app .courseos-wb-overlay-card {
  border-color: var(--cos-line);
  background: var(--cos-surface);
  color: var(--cos-ink);
}

.courseos-app .training-hero {
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .training-hero h3,
.courseos-app .training-hero p,
.courseos-app .training-hero > div:first-child > span {
  color: var(--cos-ink);
}

.courseos-app .training-card.current {
  border-color: #a9c4f8;
  box-shadow: 0 0 0 3px var(--cos-primary-soft);
}

.courseos-app .courseos-workbench,
.courseos-app .courseos-wb-layout,
.courseos-app .courseos-wb-main,
.courseos-app .courseos-wb-center {
  background: var(--cos-canvas) !important;
  color: var(--cos-ink) !important;
}

.courseos-app .courseos-wb-rail {
  border-color: var(--cos-line) !important;
  background: var(--cos-surface-soft) !important;
}

.courseos-app .courseos-wb-brand,
.courseos-app .courseos-wb-context strong,
.courseos-app .courseos-wb-stage-head h2,
.courseos-app .courseos-wb-panel h3,
.courseos-app .courseos-wb-overlay-card header h3 {
  color: var(--cos-ink) !important;
}

.courseos-app .courseos-wb-mark {
  border-radius: 10px !important;
  background: var(--cos-primary) !important;
  color: #fff !important;
  transform: none !important;
}

.courseos-app .courseos-wb-live,
.courseos-app .courseos-wb-resource.active {
  border-color: #bcd3ff !important;
  background: var(--cos-primary-soft) !important;
  color: var(--cos-primary) !important;
}

.courseos-app .courseos-wb-canvas,
.courseos-app .courseos-wb-transport,
.courseos-app .courseos-wb-resource,
.courseos-app .courseos-wb-tool {
  border-color: var(--cos-line) !important;
  border-radius: 11px !important;
  background: var(--cos-surface) !important;
  box-shadow: var(--cos-shadow-sm) !important;
  color: var(--cos-ink-soft) !important;
}

.courseos-app .courseos-wb-resource-icon,
.courseos-app .courseos-wb-tool-icon {
  border-radius: 9px !important;
  background: var(--cos-primary-soft) !important;
  color: var(--cos-primary) !important;
}

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

.courseos-app .classroom-tools {
  border: 1px solid var(--cos-line);
  border-radius: 12px;
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .classroom-tools button {
  border-radius: 9px;
  color: var(--cos-ink-soft);
}

.courseos-app .classroom-tools button:hover,
.courseos-app .classroom-tools .tool-active {
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

.courseos-app .ai-agent-layout,
.courseos-app .agent-workbench {
  border-color: var(--cos-line);
  border-radius: 14px;
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .ai-agent-conversation,
.courseos-app .agent-main {
  background: var(--cos-surface);
}

.courseos-app .ai-agent-conversation .ai-message-list,
.courseos-app .ai-agent-side,
.courseos-app .agent-rail,
.courseos-app .agent-context {
  background: var(--cos-surface-soft);
}

.courseos-app .ai-agent-side {
  border-color: var(--cos-line);
}

.courseos-app .ai-agent-welcome,
.courseos-app .agent-session.active,
.courseos-app .agent-product-materials {
  border-color: #c9d9fb;
  background: var(--cos-primary-soft);
}

.courseos-app .ai-agent-suggestions button,
.courseos-app .ai-agent-icon-button {
  border-color: var(--cos-line-strong);
  border-radius: 9px;
  background: var(--cos-surface);
  color: var(--cos-primary);
}

.courseos-app .ai-agent-conversation .ai-message-bubble {
  border-color: var(--cos-line);
  border-radius: 12px;
  background: var(--cos-surface);
  color: var(--cos-ink-soft);
}

.courseos-app .ai-agent-conversation .ai-message-request .ai-message-bubble {
  border-color: #c9d9fb;
  background: var(--cos-primary-soft);
  color: #274c9a;
}

.courseos-app .ai-agent-tool-panel,
.courseos-app .ai-agent-side-section {
  border-color: var(--cos-line);
}

@media (max-width: 980px) {
  .courseos-app .app,
  .courseos-app .institution-shell.visible {
    grid-template-columns: 216px minmax(0, 1fr);
  }

  .courseos-app .content,
  .courseos-app .institution-content {
    padding-right: 24px;
    padding-left: 24px;
  }
}

@media (max-width: 720px) {
  .courseos-app .app,
  .courseos-app .institution-shell.visible {
    grid-template-columns: 1fr;
  }

  .courseos-app .sidebar,
  .courseos-app .institution-side {
    display: none;
  }

  .courseos-app .topbar,
  .courseos-app .institution-top {
    padding: 0 16px;
  }

  .courseos-app .content,
  .courseos-app .institution-content {
    padding: 22px 16px 40px;
  }

  .courseos-app .headline,
  .courseos-app .inst-welcome,
  .courseos-app .inst-page-head {
    display: block;
  }

  .courseos-app .headline > *,
  .courseos-app .inst-welcome > *,
  .courseos-app .inst-page-head > * {
    margin-top: 14px;
  }

  .courseos-app .headline h1,
  .courseos-app .inst-welcome h2,
  .courseos-app .inst-page-head h2 {
    font-size: 24px;
  }

  .courseos-app .topbar .global-search {
    display: none;
  }
}

/* Course materials use one content model across headquarters and institution views. */
.courseos-app .courseos-materials-head {
  margin-bottom: 22px;
}

.courseos-app .courseos-materials-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.courseos-app .courseos-materials-kpi {
  min-width: 0;
  padding: 16px 18px;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .courseos-materials-kpi span,
.courseos-app .courseos-materials-kpi small {
  display: block;
  color: var(--cos-muted);
  font-size: 10px;
}

.courseos-app .courseos-materials-kpi b {
  display: block;
  margin: 8px 0 4px;
  color: var(--cos-ink);
  font-size: 25px;
  line-height: 1;
}

.courseos-app .courseos-materials-workspace {
  padding: 18px;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .courseos-materials-toolbar {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

.courseos-app .courseos-material-search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 300px;
  min-width: 220px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--cos-line);
  border-radius: 10px;
  background: var(--cos-surface);
  color: var(--cos-muted);
}

.courseos-app .courseos-material-search:focus-within {
  border-color: #9ebaff;
  box-shadow: 0 0 0 4px rgba(63, 123, 243, .1);
}

.courseos-app .courseos-material-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--cos-ink);
  font-size: 11px;
}

.courseos-app .courseos-materials-toolbar select {
  min-width: 190px;
  height: 40px;
}

.courseos-app .courseos-materials-filter-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--cos-line);
}

.courseos-app .courseos-materials-filter-label {
  flex: none;
  color: var(--cos-muted);
  font-size: 10px;
  font-weight: 700;
}

.courseos-app .courseos-materials-filters,
.courseos-app .institution-material-filters {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.courseos-app .courseos-materials-filters button,
.courseos-app .institution-material-filters button {
  min-height: 30px;
  padding: 6px 10px;
  border: 1px solid var(--cos-line);
  border-radius: 8px;
  background: var(--cos-surface);
  color: var(--cos-muted);
  font-size: 10px;
  cursor: pointer;
}

.courseos-app .courseos-materials-filters button:hover,
.courseos-app .courseos-materials-filters button.active,
.courseos-app .institution-material-filters button:hover,
.courseos-app .institution-material-filters button.active {
  border-color: #b9cdf7;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

.courseos-app .courseos-materials-summary-text {
  margin-left: auto;
  flex: none;
  color: var(--cos-muted);
  font-size: 10px;
}

.courseos-app .courseos-materials-grid,
.courseos-app .institution-material-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.courseos-app .courseos-material-card,
.courseos-app .institution-material-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
  transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}

.courseos-app .courseos-material-card:hover,
.courseos-app .institution-material-card:hover {
  border-color: #b9cdf7;
  box-shadow: var(--cos-shadow);
  transform: translateY(-2px);
}

.courseos-app .courseos-material-card-cover,
.courseos-app .institution-material-card-cover {
  position: relative;
  min-height: 164px;
  padding: 15px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  overflow: hidden;
  color: #fff;
}

.courseos-app .courseos-material-card-cover:after,
.courseos-app .institution-material-card-cover:after {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  right: -50px;
  bottom: -62px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .18);
}

.courseos-app .courseos-material-card-cover.cover-coral,
.courseos-app .institution-material-card-cover.cover-coral {
  background: linear-gradient(135deg, #ed9375, #b65d67);
}

.courseos-app .courseos-material-card-cover.cover-indigo,
.courseos-app .institution-material-card-cover.cover-indigo {
  background: linear-gradient(135deg, #668ef2, #4051a6);
}

.courseos-app .courseos-material-card-cover.cover-mint,
.courseos-app .institution-material-card-cover.cover-mint {
  background: linear-gradient(135deg, #53b9a8, #257c91);
}

.courseos-app .courseos-material-card-cover.cover-purple,
.courseos-app .institution-material-card-cover.cover-purple {
  background: linear-gradient(135deg, #9c83e7, #6259ae);
}

.courseos-app .courseos-material-check,
.courseos-app .institution-material-card-cover > input {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .2);
}

.courseos-app .courseos-material-check input {
  width: 14px;
  height: 14px;
  accent-color: #fff;
}

.courseos-app .courseos-material-cover-content,
.courseos-app .institution-material-card-cover > div {
  position: relative;
  z-index: 1;
  align-self: flex-end;
  min-width: 0;
  max-width: 78%;
}

.courseos-app .courseos-material-type,
.courseos-app .courseos-material-cover-content small,
.courseos-app .institution-material-card-cover small {
  display: block;
  color: rgba(255, 255, 255, .78);
  font-size: 9px;
}

.courseos-app .courseos-material-cover-content strong,
.courseos-app .institution-material-card-cover b {
  display: block;
  margin: 6px 0 4px;
  color: #fff;
  font-size: 16px;
  line-height: 1.35;
}

.courseos-app .courseos-material-status,
.courseos-app .institution-material-card-cover em {
  position: relative;
  z-index: 1;
  flex: none;
  font-style: normal;
  font-size: 9px;
}

.courseos-app .courseos-material-status .courseos-live-pill {
  background: rgba(255, 255, 255, .18);
  color: #fff;
}

.courseos-app .courseos-material-card-body,
.courseos-app .institution-material-card-body {
  padding: 15px;
}

.courseos-app .courseos-material-path,
.courseos-app .institution-material-card-body > strong {
  display: block;
  overflow: hidden;
  color: var(--cos-primary);
  font-size: 10px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.courseos-app .courseos-material-card-body p,
.courseos-app .institution-material-card-body p {
  min-height: 32px;
  margin: 8px 0 12px;
  color: var(--cos-muted);
  font-size: 10px;
  line-height: 1.6;
}

.courseos-app .courseos-material-file {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--cos-line);
  border-radius: 9px;
  background: var(--cos-surface-soft);
}

.courseos-app .courseos-material-file-icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex: none;
  border-radius: 8px;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
  font-size: 8px;
  font-weight: 800;
}

.courseos-app .courseos-material-file div {
  min-width: 0;
}

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

.courseos-app .courseos-material-file b {
  color: var(--cos-ink-soft);
  font-size: 10px;
}

.courseos-app .courseos-material-file small {
  margin-top: 4px;
  color: var(--cos-muted);
  font-size: 9px;
}

.courseos-app .courseos-material-card-actions,
.courseos-app .institution-material-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 13px;
}

.courseos-app .courseos-material-card-actions button,
.courseos-app .institution-material-actions button {
  min-height: 30px;
  padding: 6px 9px;
  font-size: 9px;
}

.courseos-app .courseos-material-card-actions .courseos-material-more {
  margin-left: auto;
  border: 0;
  background: transparent;
  color: var(--cos-muted);
}

.courseos-app .courseos-material-pending,
.courseos-app .institution-material-pending,
.courseos-app .institution-material-online {
  color: #bd7047;
  font-size: 9px;
}

.courseos-app .courseos-material-empty,
.courseos-app .institution-material-empty {
  grid-column: 1 / -1;
  padding: 52px 20px;
  border: 1px dashed var(--cos-line-strong);
  border-radius: var(--cos-radius);
  text-align: center;
}

.courseos-app .courseos-material-empty-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin: 0 auto 10px;
  border-radius: 12px;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
  font-size: 19px;
}

.courseos-app .courseos-material-empty b,
.courseos-app .courseos-material-empty span,
.courseos-app .institution-material-empty b,
.courseos-app .institution-material-empty span {
  display: block;
}

.courseos-app .courseos-material-empty b,
.courseos-app .institution-material-empty b {
  color: var(--cos-ink-soft);
  font-size: 12px;
}

.courseos-app .courseos-material-empty span,
.courseos-app .institution-material-empty span {
  margin-top: 7px;
  color: var(--cos-muted);
  font-size: 10px;
}

.courseos-app .institution-material-toolbar {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
  margin: 15px 0 10px;
}

.courseos-app .institution-material-toolbar .courseos-material-search {
  flex: 1 1 240px;
}

.courseos-app .institution-material-filters {
  margin-bottom: 15px;
}

/* Business operations is a working console, not a placeholder dashboard. */
.courseos-app .business-page-head {
  margin-bottom: 20px;
}

.courseos-app .business-kpis {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.courseos-app .business-kpis > div,
.courseos-app .business-panel {
  min-width: 0;
  border: 1px solid var(--cos-line);
  border-radius: var(--cos-radius);
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}

.courseos-app .business-kpis > div {
  padding: 16px 17px;
}

.courseos-app .business-kpis span,
.courseos-app .business-kpis small {
  display: block;
  color: var(--cos-muted);
  font-size: 10px;
}

.courseos-app .business-kpis b {
  display: block;
  margin: 10px 0 5px;
  color: var(--cos-ink);
  font-size: 25px;
  line-height: 1;
}

.courseos-app .business-main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: 14px;
  margin-bottom: 14px;
}

.courseos-app .business-panel {
  padding: 18px;
}

.courseos-app .business-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 13px;
}

.courseos-app .business-panel-head h3 {
  margin: 0;
  color: var(--cos-ink);
  font-size: 14px;
}

.courseos-app .business-panel-head p {
  margin: 5px 0 0;
  color: var(--cos-muted);
  font-size: 10px;
}

.courseos-app .business-panel-meta {
  flex: none;
  color: var(--cos-primary);
  font-size: 10px;
  font-weight: 700;
}

.courseos-app .business-followup-list,
.courseos-app .business-usage-list {
  display: grid;
  gap: 2px;
}

.courseos-app .business-followup-row,
.courseos-app .business-usage-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 11px 0;
  border-top: 1px solid #edf1f6;
}

.courseos-app .business-followup-row > div,
.courseos-app .business-usage-row > div:nth-child(2) {
  flex: 1;
  min-width: 0;
}

.courseos-app .business-followup-row b,
.courseos-app .business-followup-row small,
.courseos-app .business-usage-row b,
.courseos-app .business-usage-row small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.courseos-app .business-followup-row b,
.courseos-app .business-usage-row b {
  color: var(--cos-ink-soft);
  font-size: 11px;
}

.courseos-app .business-followup-row small,
.courseos-app .business-usage-row small {
  margin-top: 4px;
  color: var(--cos-muted);
  font-size: 9px;
}

.courseos-app .business-followup-icon,
.courseos-app .business-usage-avatar {
  display: grid;
  place-items: center;
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
  font-size: 11px;
  font-weight: 800;
}

.courseos-app .business-followup-icon.overdue {
  background: var(--cos-accent-soft);
  color: #b96b3c;
}

.courseos-app .business-usage-avatar {
  background: #eef7f4;
  color: #2b9476;
}

.courseos-app .business-usage-row > span {
  flex: none;
  color: var(--cos-muted);
  font-size: 9px;
}

.courseos-app .business-followup-row button {
  flex: none;
  padding: 6px 8px;
  font-size: 9px;
}

.courseos-app .business-finance-panel {
  overflow: hidden;
}

.courseos-app .business-finance-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 4px 0 14px;
  padding: 12px;
  border: 1px solid var(--cos-line);
  border-radius: 10px;
  background: var(--cos-surface-soft);
}

.courseos-app .business-search {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 1 1 260px;
  min-width: 210px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--cos-line);
  border-radius: 8px;
  background: var(--cos-surface);
  color: var(--cos-muted);
}

.courseos-app .business-search:focus-within {
  border-color: #9ebaff;
  box-shadow: 0 0 0 3px rgba(63, 123, 243, .1);
}

.courseos-app .business-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--cos-ink);
  font-size: 10px;
}

.courseos-app .business-finance-toolbar select {
  min-width: 125px;
  height: 36px;
  font-size: 10px;
}

.courseos-app .business-row-actions {
  gap: 5px;
  flex-wrap: wrap;
}

.courseos-app .business-row-actions button {
  padding: 6px 7px;
  font-size: 9px;
  white-space: nowrap;
}

.courseos-app .business-finance-table td small {
  display: block;
  margin-top: 4px;
  color: var(--cos-muted);
  font-size: 9px;
}

.courseos-app .business-status {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 3px 7px;
  border-radius: 6px;
  font-size: 9px;
  white-space: nowrap;
}

.courseos-app .business-status-paid {
  background: var(--cos-success-soft);
  color: #218963;
}

.courseos-app .business-status-pending {
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
}

.courseos-app .business-status-overdue {
  background: var(--cos-accent-soft);
  color: #b96b3c;
}

.courseos-app .business-status-cancelled {
  background: #f0f2f5;
  color: var(--cos-muted);
}

.courseos-app .business-empty {
  padding: 26px 12px;
  color: var(--cos-muted);
  font-size: 10px;
  text-align: center;
}

@media (max-width: 1100px) {
  .courseos-app .business-kpis {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .courseos-app .business-main-grid {
    grid-template-columns: 1fr;
  }

  .courseos-app .business-kpis {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .courseos-app .business-kpis {
    grid-template-columns: 1fr;
  }

  .courseos-app .business-panel {
    padding: 14px;
  }

  .courseos-app .business-finance-toolbar select {
    width: 100%;
  }
}

.courseos-app .material-preview-body video {
  width: 100%;
  height: 100%;
  background: #101827;
  object-fit: contain;
}

.courseos-app .material-preview-audio {
  width: min(460px, 86%);
  padding: 32px;
  border: 1px solid var(--cos-line);
  border-radius: 14px;
  background: var(--cos-surface);
  text-align: center;
  box-shadow: var(--cos-shadow);
}

.courseos-app .material-preview-audio-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: 16px;
  background: var(--cos-primary-soft);
  color: var(--cos-primary);
  font-size: 26px;
}

.courseos-app .material-preview-audio b {
  display: block;
  color: var(--cos-ink);
  font-size: 12px;
}

.courseos-app .material-preview-audio audio {
  width: 100%;
  margin-top: 20px;
}

@media (max-width: 1050px) {
  .courseos-app .courseos-materials-grid,
  .courseos-app .institution-material-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .courseos-app .courseos-materials-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .courseos-app .courseos-materials-workspace {
    padding: 13px;
  }

  .courseos-app .courseos-materials-filter-row {
    display: block;
  }

  .courseos-app .courseos-materials-filter-label {
    margin-bottom: 8px;
  }

  .courseos-app .courseos-materials-summary-text {
    display: block;
    margin: 10px 0 0;
  }

  .courseos-app .courseos-materials-grid,
  .courseos-app .institution-material-grid {
    grid-template-columns: 1fr;
  }
}

/* Shared interaction states for both workspaces and their lesson surfaces. */
.courseos-app .platform-asset-viewer {
  z-index: 450 !important;
}

.courseos-app :is(button, [role="button"]):disabled,
.courseos-app button[aria-disabled="true"],
.courseos-workbench button:disabled {
  cursor: not-allowed;
  opacity: .48;
  transform: none;
  box-shadow: none;
}

.courseos-app :is(button, [role="button"]):not(:disabled):active,
.courseos-workbench button:not(:disabled):active {
  transform: translateY(1px);
  box-shadow: none;
}

.courseos-app :is(input, select, textarea):not(:disabled):focus-visible,
.courseos-app :is(.inst-search, .global-search, .institution-global-search):focus-within {
  border-color: #8aaef7;
  box-shadow: 0 0 0 3px rgba(63, 123, 243, .13);
}

.courseos-app :is(button, a, input, select, textarea):focus-visible,
.courseos-workbench :is(button, a, input, select, textarea):focus-visible {
  outline: 2px solid #2f63d6;
  outline-offset: 2px;
}

.courseos-app .platform-lesson-preview-body,
.courseos-app .platform-ppt-page-list,
.courseos-app .platform-asset-viewer-screen {
  overscroll-behavior: contain;
}

.courseos-app .platform-lesson-preview-body {
  scrollbar-gutter: stable;
}

.courseos-app .platform-lesson-preview-tab {
  transition: color .16s ease, background-color .16s ease, border-color .16s ease;
}

.courseos-app .platform-ppt-page-thumb,
.courseos-app .platform-preview-resource-card,
.courseos-app .institution-explorer-card {
  transition: border-color .16s ease, box-shadow .16s ease, background-color .16s ease;
}

@media (hover: hover) {
  .courseos-app .platform-ppt-page-thumb:not(:disabled):hover,
  .courseos-app .platform-preview-resource-card:not(:disabled):hover,
  .courseos-app .institution-explorer-card:hover {
    border-color: #9bbcf8;
    box-shadow: 0 6px 18px rgba(30, 52, 88, .1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .courseos-app .platform-lesson-preview-tab,
  .courseos-app .platform-ppt-page-thumb,
  .courseos-app .platform-preview-resource-card,
  .courseos-app .institution-explorer-card {
    transition: none;
  }
}

/* Task-first Agent workbench: execution is the primary surface, chat is a log. */
.courseos-app .ai-agent-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 292px;
  min-height: 720px;
  overflow: hidden;
  border: 1px solid var(--cos-line);
  border-radius: 14px;
  background: var(--cos-surface);
  box-shadow: var(--cos-shadow-sm);
}
.courseos-app .ai-agent-queue,
.courseos-app .ai-agent-context-panel {
  min-width: 0;
  background: var(--cos-surface-soft);
}
.courseos-app .ai-agent-queue { padding: 17px 14px; border-right: 1px solid var(--cos-line); }
.courseos-app .ai-agent-context-panel { padding: 14px; border-left: 1px solid var(--cos-line); overflow: auto; }
.courseos-app .ai-agent-queue-head,
.courseos-app .ai-context-card-head,
.courseos-app .ai-agent-command-head,
.courseos-app .ai-agent-launch-head,
.courseos-app .ai-agent-execution-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.courseos-app .ai-agent-queue-head h3,
.courseos-app .ai-context-card h3,
.courseos-app .ai-agent-launch-head h3,
.courseos-app .ai-agent-execution-head h3 { margin: 4px 0 0; color: var(--cos-ink); font-size: 15px; }
.courseos-app .ai-section-kicker { color: var(--cos-primary); font: 700 9px/1.2 "DM Mono", monospace; letter-spacing: .12em; }
.courseos-app .ai-agent-queue .ai-session-list { display: grid; gap: 5px; margin-top: 16px; max-height: 470px; overflow: auto; }
.courseos-app .ai-agent-queue .ai-session-item { width: 100%; padding: 10px 9px; border: 1px solid transparent; border-radius: 9px; background: transparent; color: var(--cos-ink-soft); text-align: left; }
.courseos-app .ai-agent-queue .ai-session-item:hover { background: var(--cos-primary-soft); }
.courseos-app .ai-agent-queue .ai-session-item.active { border-color: #c9d9fb; background: var(--cos-primary-soft); color: #274c9a; }
.courseos-app .ai-agent-queue .ai-session-item b,
.courseos-app .ai-agent-queue .ai-session-item span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.courseos-app .ai-agent-queue .ai-session-item b { font-size: 10px; }
.courseos-app .ai-agent-queue .ai-session-item span { margin-top: 4px; color: var(--cos-muted); font-size: 8px; }
.courseos-app .ai-agent-session-actions { display: flex; gap: 6px; margin-top: 12px; }
.courseos-app .ai-agent-session-actions button { flex: 1; padding: 7px 6px; border: 1px solid var(--cos-line); border-radius: 7px; background: var(--cos-surface); color: var(--cos-ink-soft); font-size: 9px; }
.courseos-app .ai-agent-queue-note { margin-top: 24px; padding: 11px; border: 1px solid var(--cos-line); border-radius: 9px; background: var(--cos-surface); }
.courseos-app .ai-agent-queue-note b,
.courseos-app .ai-agent-queue-note span { display: block; }
.courseos-app .ai-agent-queue-note b { color: var(--cos-ink); font-size: 10px; }
.courseos-app .ai-agent-queue-note span { margin-top: 5px; color: var(--cos-muted); font-size: 9px; line-height: 1.6; }
.courseos-app .ai-agent-command-center { min-width: 0; background: var(--cos-surface); }
.courseos-app .ai-agent-command-head { padding: 20px 22px 16px; border-bottom: 1px solid var(--cos-line); }
.courseos-app .ai-agent-command-head h2 { margin: 5px 0 0; color: var(--cos-ink); font-size: 20px; }
.courseos-app .ai-agent-command-head p,
.courseos-app .ai-agent-launch-head p,
.courseos-app .ai-agent-execution-head p { margin: 5px 0 0; color: var(--cos-muted); font-size: 10px; line-height: 1.6; }
.courseos-app .ai-agent-command-actions { display: flex; align-items: center; gap: 8px; flex: none; }
.courseos-app .ai-agent-connection { display: inline-flex; align-items: center; gap: 6px; padding: 7px 9px; border: 1px solid #cae1d5; border-radius: 7px; background: #f0f9f3; color: #167046; font-size: 9px; white-space: nowrap; }
.courseos-app .ai-agent-connection::before { width: 6px; height: 6px; border-radius: 50%; background: #28a866; content: ""; }
.courseos-app .ai-agent-launch-card,
.courseos-app .ai-agent-execution-card { margin: 16px 20px 0; border: 1px solid var(--cos-line); border-radius: 12px; background: var(--cos-surface); }
.courseos-app .ai-agent-launch-card { padding: 17px; background: #fbfdff; }
.courseos-app .ai-agent-launch-head { margin-bottom: 15px; }
.courseos-app .ai-agent-run-mode { padding: 6px 8px; border: 1px solid #c9d9fb; border-radius: 6px; color: #31569e; background: var(--cos-primary-soft); font-size: 9px; white-space: nowrap; }
.courseos-app .ai-agent-launch-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(260px, 1.1fr); gap: 16px; }
.courseos-app .ai-agent-task-picker { padding: 13px; border: 1px solid var(--cos-line); border-radius: 9px; background: var(--cos-surface); }
.courseos-app .ai-agent-task-picker label,
.courseos-app .ai-agent-run-form label { display: grid; gap: 6px; color: var(--cos-ink-soft); font-size: 10px; }
.courseos-app .ai-agent-task-picker select,
.courseos-app .ai-agent-run-form input,
.courseos-app .ai-agent-run-form select,
.courseos-app .ai-agent-run-form textarea { width: 100%; border: 1px solid var(--cos-line); border-radius: 7px; padding: 9px 10px; color: var(--cos-ink); background: var(--cos-surface); font: inherit; font-size: 10px; outline: none; }
.courseos-app .ai-agent-run-form textarea { min-height: 62px; resize: vertical; }
.courseos-app .ai-agent-task-picker select:focus,
.courseos-app .ai-agent-run-form input:focus,
.courseos-app .ai-agent-run-form select:focus,
.courseos-app .ai-agent-run-form textarea:focus { border-color: #87a9ed; box-shadow: 0 0 0 3px #e5edff; }
.courseos-app .ai-agent-task-picker p { margin: 7px 0 14px; color: var(--cos-muted); font-size: 9px; line-height: 1.6; }
.courseos-app .ai-agent-task-label { margin: 12px 0 8px; color: var(--cos-ink); font-size: 10px; font-weight: 700; }
.courseos-app .ai-ops-roles { display: flex; flex-wrap: wrap; gap: 5px; }
.courseos-app .ai-ops-roles button,
.courseos-app .ai-ops-tasks button { border: 1px solid var(--cos-line); border-radius: 7px; background: var(--cos-surface); color: var(--cos-ink-soft); }
.courseos-app .ai-ops-roles button { padding: 6px 8px; font-size: 9px; }
.courseos-app .ai-ops-roles button.active,
.courseos-app .ai-ops-roles button:hover { border-color: #a8c1f4; background: var(--cos-primary-soft); color: #31569e; }
.courseos-app .ai-ops-tasks { display: grid; gap: 5px; margin-top: 8px; }
.courseos-app .ai-ops-tasks button { display: grid; gap: 3px; padding: 8px; text-align: left; }
.courseos-app .ai-ops-tasks button b { font-size: 10px; }
.courseos-app .ai-ops-tasks button span { color: var(--cos-muted); font-size: 8px; }
.courseos-app .ai-ops-tasks button.active,
.courseos-app .ai-ops-tasks button:hover { border-color: #a8c1f4; background: var(--cos-primary-soft); }
.courseos-app .ai-agent-run-form { display: grid; gap: 9px; padding: 13px; border: 1px solid var(--cos-line); border-radius: 9px; background: var(--cos-surface); }
.courseos-app .ai-agent-selected-task { padding: 10px; border-left: 3px solid var(--cos-primary); background: var(--cos-primary-soft); }
.courseos-app .ai-agent-selected-task span,
.courseos-app .ai-agent-selected-task b,
.courseos-app .ai-agent-selected-task small { display: block; }
.courseos-app .ai-agent-selected-task span { color: var(--cos-primary); font-size: 8px; }
.courseos-app .ai-agent-selected-task b { margin-top: 3px; color: var(--cos-ink); font-size: 12px; }
.courseos-app .ai-agent-selected-task small { margin-top: 3px; color: var(--cos-muted); font-size: 9px; }
.courseos-app .ai-agent-start-button { display: flex; align-items: center; justify-content: center; gap: 6px; min-height: 39px; margin-top: 2px; border-radius: 8px; font-size: 10px; }
.courseos-app .ai-agent-start-button span { font-size: 9px; }
.courseos-app .ai-agent-execution-card { padding: 17px; }
.courseos-app .ai-agent-execution-head { align-items: center; }
.courseos-app .ai-run-status { padding: 6px 9px; border-radius: 7px; font-size: 9px; white-space: nowrap; }
.courseos-app .ai-run-status.idle { border: 1px solid var(--cos-line); color: var(--cos-muted); background: var(--cos-surface-soft); }
.courseos-app .ai-run-status.running { border: 1px solid #b9d2fa; color: #31569e; background: #edf3ff; }
.courseos-app .ai-run-status.awaiting_review { border: 1px solid #f0d4a5; color: #9a641d; background: #fff8ea; }
.courseos-app .ai-run-status.completed { border: 1px solid #c7e3d2; color: #167046; background: #effaf3; }
.courseos-app .ai-run-status.failed { border: 1px solid #edc1c1; color: #a34141; background: #fff1f1; }
.courseos-app .ai-run-timeline { display: grid; gap: 0; margin-top: 15px; }
.courseos-app .ai-run-step { display: grid; grid-template-columns: 28px minmax(0, 1fr) auto; align-items: center; gap: 9px; min-height: 52px; border-top: 1px solid var(--cos-line); }
.courseos-app .ai-run-step-index { display: grid; place-items: center; width: 22px; height: 22px; border: 1px solid var(--cos-line-strong); border-radius: 50%; color: var(--cos-muted); background: var(--cos-surface); font-size: 9px; }
.courseos-app .ai-run-step.done .ai-run-step-index { border-color: #a6d1b5; color: #167046; background: #effaf3; }
.courseos-app .ai-run-step.active .ai-run-step-index { border-color: #a8c1f4; color: #31569e; background: var(--cos-primary-soft); }
.courseos-app .ai-run-step.failed .ai-run-step-index { border-color: #e5b7b7; color: #a34141; background: #fff1f1; }
.courseos-app .ai-run-step b,
.courseos-app .ai-run-step span { display: block; }
.courseos-app .ai-run-step b { color: var(--cos-ink); font-size: 10px; }
.courseos-app .ai-run-step span { margin-top: 3px; color: var(--cos-muted); font-size: 9px; }
.courseos-app .ai-run-step em { color: var(--cos-muted); font-size: 8px; font-style: normal; }
.courseos-app .ai-run-step.active em { color: #31569e; }
.courseos-app .ai-run-step.done em { color: #167046; }
.courseos-app .ai-run-empty { display: grid; gap: 5px; padding: 22px 10px; text-align: center; color: var(--cos-muted); }
.courseos-app .ai-run-empty b { color: var(--cos-ink); font-size: 11px; }
.courseos-app .ai-run-empty span { font-size: 9px; line-height: 1.6; }
.courseos-app .ai-run-error { margin-top: 12px; padding: 10px; border: 1px solid #edc1c1; border-radius: 8px; background: #fff5f5; color: #a34141; font-size: 10px; line-height: 1.6; }
.courseos-app .ai-run-output { margin-top: 14px; border-top: 1px solid var(--cos-line); padding-top: 14px; }
.courseos-app .ai-run-output-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; color: var(--cos-ink); font-size: 10px; font-weight: 700; }
.courseos-app .ai-run-output-head small { color: var(--cos-muted); font-size: 8px; font-weight: 400; }
.courseos-app .ai-run-output pre { max-height: 240px; margin: 9px 0 0; overflow: auto; white-space: pre-wrap; word-break: break-word; color: var(--cos-ink-soft); font: 10px/1.75 inherit; }
.courseos-app .ai-context-card { padding: 13px; border: 1px solid var(--cos-line); border-radius: 10px; background: var(--cos-surface); }
.courseos-app .ai-context-card + .ai-context-card { margin-top: 12px; }
.courseos-app .ai-context-card-head { align-items: center; }
.courseos-app .ai-context-card-head > span { color: var(--cos-muted); font-size: 8px; }
.courseos-app .ai-context-summary,
.courseos-app .ai-deliverables-card > p { margin: 9px 0 12px; color: var(--cos-muted); font-size: 9px; line-height: 1.6; }
.courseos-app .ai-agent-upload { display: block; padding: 9px; border: 1px dashed #a8c1f4; border-radius: 7px; color: #31569e; background: var(--cos-primary-soft); font-size: 9px; text-align: center; cursor: pointer; }
.courseos-app .ai-agent-upload input { display: none; }
.courseos-app .ai-context-panel .ai-asset-list { display: grid; gap: 5px; margin-top: 9px; }
.courseos-app .ai-context-panel .ai-asset-row { display: flex; align-items: center; gap: 7px; padding: 7px; border-top: 1px solid var(--cos-line); }
.courseos-app .ai-context-panel .ai-asset-row:first-child { border-top: 0; }
.courseos-app .ai-context-panel .ai-asset-copy { min-width: 0; flex: 1; }
.courseos-app .ai-context-panel .ai-asset-copy b,
.courseos-app .ai-context-panel .ai-asset-copy small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.courseos-app .ai-context-panel .ai-asset-copy b { color: var(--cos-ink); font-size: 9px; }
.courseos-app .ai-context-panel .ai-asset-copy small { margin-top: 3px; color: var(--cos-muted); font-size: 8px; }
.courseos-app .ai-deliverables-card .ai-execution-row { display: grid; gap: 8px; padding: 10px 0; border-top: 1px solid var(--cos-line); }
.courseos-app .ai-deliverables-card .ai-execution-title b,
.courseos-app .ai-deliverables-card .ai-execution-title span { display: block; }
.courseos-app .ai-deliverables-card .ai-execution-title b { color: var(--cos-ink); font-size: 10px; }
.courseos-app .ai-deliverables-card .ai-execution-title span { margin-top: 3px; color: var(--cos-muted); font-size: 8px; }
.courseos-app .ai-deliverables-card .ai-execution-row label { display: grid; gap: 4px; color: var(--cos-muted); font-size: 8px; }
.courseos-app .ai-deliverables-card .ai-execution-row input,
.courseos-app .ai-deliverables-card .ai-execution-row select { width: 100%; border: 1px solid var(--cos-line); border-radius: 6px; padding: 6px; color: var(--cos-ink); background: var(--cos-surface); font: inherit; font-size: 9px; }
.courseos-app .ai-agent-chat-secondary { margin: 16px 20px 20px; border: 1px solid var(--cos-line); border-radius: 10px; background: var(--cos-surface-soft); }
.courseos-app .ai-agent-chat-secondary summary { padding: 11px 13px; color: var(--cos-ink-soft); cursor: pointer; font-size: 10px; font-weight: 700; }
.courseos-app .ai-agent-chat-secondary .ai-message-list { max-height: 260px; padding: 12px 13px; overflow: auto; border-top: 1px solid var(--cos-line); }
.courseos-app .ai-agent-chat-secondary .ai-ops-refine { padding: 11px 13px; border-top: 1px solid var(--cos-line); }

@media (max-width: 1180px) {
  .courseos-app .ai-agent-layout { grid-template-columns: 190px minmax(0, 1fr) 260px; }
  .courseos-app .ai-agent-launch-grid { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .courseos-app .ai-agent-layout { grid-template-columns: 190px minmax(0, 1fr); }
  .courseos-app .ai-agent-context-panel { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; border-top: 1px solid var(--cos-line); border-left: 0; }
  .courseos-app .ai-context-card + .ai-context-card { margin-top: 0; }
}
@media (max-width: 680px) {
  .courseos-app .ai-agent-layout { display: block; }
  .courseos-app .ai-agent-queue { border-right: 0; border-bottom: 1px solid var(--cos-line); }
  .courseos-app .ai-agent-queue .ai-session-list { display: flex; max-height: none; overflow: auto; }
  .courseos-app .ai-agent-queue .ai-session-item { min-width: 170px; }
  .courseos-app .ai-agent-context-panel { display: block; }
  .courseos-app .ai-context-card + .ai-context-card { margin-top: 12px; }
  .courseos-app .ai-agent-command-head,
  .courseos-app .ai-agent-launch-head { display: block; }
  .courseos-app .ai-agent-command-actions { margin-top: 12px; }
  .courseos-app .ai-agent-launch-card,
  .courseos-app .ai-agent-execution-card { margin-right: 12px; margin-left: 12px; }
  .courseos-app .ai-agent-chat-secondary { margin-right: 12px; margin-left: 12px; }
}

/* Shared interaction polish: stable controls, visible keyboard focus and clear pending states. */
.courseos-app button,
.courseos-app a,
.courseos-app input,
.courseos-app select,
.courseos-app textarea,
.learning-child button,
.learning-child a,
.learning-child input,
.learning-child select,
.learning-child textarea {
  -webkit-tap-highlight-color: transparent;
}

.courseos-app button:focus-visible,
.courseos-app a:focus-visible,
.courseos-app input:focus-visible,
.courseos-app select:focus-visible,
.courseos-app textarea:focus-visible,
.learning-child button:focus-visible,
.learning-child a:focus-visible,
.learning-child input:focus-visible,
.learning-child select:focus-visible,
.learning-child textarea:focus-visible {
  outline: 3px solid rgba(22, 118, 109, .24);
  outline-offset: 2px;
}

.courseos-app button:disabled,
.learning-child button:disabled,
.courseos-app [aria-busy="true"],
.learning-child [aria-busy="true"] {
  cursor: wait;
  opacity: .62;
}

.courseos-app .view,
.courseos-app .inst-view,
.learning-admin #learningStudio,
.learning-child #studentLearning {
  min-width: 0;
  overflow-wrap: anywhere;
}

@media (prefers-reduced-motion: reduce) {
  .courseos-app *,
  .learning-child * {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}