:root {
  --primary: #a83300;
  --primary-container: #cb4a18;
  --primary-fixed: #ffdbd0;
  --on-primary: #ffffff;
  --background: #f7f9fb;
  --surface: #f7f9fb;
  --surface-elevated: #ffffff;
  --surface-container-low: #f2f4f6;
  --surface-container: #eceef0;
  --secondary: #565e74;
  --secondary-container: #dae2fd;
  --on-secondary-container: #5c647a;
  --outline-variant: #e1bfb5;
  --on-surface: #191c1e;
  --inverse-surface: #2d3133;
  --inverse-on-surface: #eff1f3;
  --error: #ba1a1a;
  --banner-error-bg: #ffdad6;
  --banner-error-text: #93000a;
  --canvas-overlay-bg: rgba(247, 249, 251, 0.88);
  --slide-canvas-bg: rgba(216, 218, 220, 0.15);
  --hover-overlay: rgba(255, 255, 255, 0.65);
  --badge-rag-text: #390c00;
  --progress-done: #2d6a4f;
  --input-focus-ring: rgba(168, 51, 0, 0.15);
  --sidebar-w: 280px;
  --topbar-h: 64px;
  --context-bar-h: 72px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] {
  color-scheme: dark;
  --background: #121416;
  --surface: #1a1c1e;
  --surface-elevated: #242729;
  --surface-container-low: #1e2022;
  --surface-container: #2a2d30;
  --secondary: #b8bcc8;
  --secondary-container: #3d4454;
  --on-secondary-container: #dae2fd;
  --outline-variant: #4a403c;
  --on-surface: #e3e2e6;
  --primary-fixed: #5c2a12;
  --banner-error-bg: #93000a;
  --banner-error-text: #ffdad6;
  --canvas-overlay-bg: rgba(18, 20, 22, 0.88);
  --slide-canvas-bg: rgba(255, 255, 255, 0.04);
  --hover-overlay: rgba(255, 255, 255, 0.06);
  --badge-rag-text: #ffdbd0;
  --progress-done: #6fcf97;
  --input-focus-ring: rgba(203, 74, 24, 0.25);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hanken Grotesk", system-ui, sans-serif;
  background: var(--background);
  color: var(--on-surface);
  -webkit-font-smoothing: antialiased;
}

.material-symbols-outlined {
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
  vertical-align: middle;
}

.hidden { display: none !important; }

.studio-banner {
  position: fixed;
  top: 0;
  left: var(--sidebar-w);
  right: 0;
  z-index: 100;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  text-align: center;
}

.studio-banner-loading { background: var(--secondary-container); color: var(--on-secondary-container); }
.studio-banner-error { background: var(--banner-error-bg); color: var(--banner-error-text); }

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1rem;
  gap: 0.5rem;
  z-index: 50;
}

.sidebar-brand h1 {
  margin: 0;
  font-size: 1.15rem;
  color: var(--primary);
}

.sidebar-brand p {
  margin: 0.15rem 0 0;
  font-size: 0.875rem;
  color: var(--secondary);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
  margin-top: 0.5rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--secondary);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  text-align: left;
}

.nav-item:hover { background: var(--surface-container-low); }
.nav-item.active {
  background: var(--secondary-container);
  color: var(--on-secondary-container);
  font-weight: 600;
}

.sidebar-footer {
  border-top: 1px solid var(--outline-variant);
  padding-top: 1rem;
  font-size: 0.8rem;
  color: var(--secondary);
}

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

.sidebar-close, .topbar-icon { display: none; }

.topbar {
  position: fixed;
  top: 0;
  left: var(--sidebar-w);
  right: 0;
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0 2rem;
  z-index: 40;
  min-width: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--secondary);
  min-width: 0;
  flex: 1;
}

.breadcrumb strong {
  color: var(--on-surface);
  border-bottom: 2px solid var(--primary);
  padding-bottom: 0.35rem;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.crumb-sep { font-size: 1rem; }

.topbar-actions { display: flex; gap: 0.5rem; align-items: center; flex-shrink: 0; }

.topbar-classic-link .material-symbols-outlined {
  font-size: 1.15rem;
}

.topbar-classic-label {
  margin-left: 0.15rem;
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 45;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  transition: opacity 0.2s ease;
  border: none;
  padding: 0;
  cursor: pointer;
}

.sidebar-backdrop:not(.hidden) {
  opacity: 1;
}

body.sidebar-open {
  overflow: hidden;
}

.workspace-context-mobile {
  margin: 0;
}

.workspace-context-mobile > summary {
  list-style: none;
}

.workspace-context-mobile > summary::-webkit-details-marker {
  display: none;
}

.workspace-context-summary {
  display: none;
}

.workspace-context-bar {
  position: fixed;
  top: var(--topbar-h);
  left: var(--sidebar-w);
  right: 0;
  z-index: 35;
  background: var(--surface-elevated);
  border-bottom: 1px solid var(--outline-variant);
  padding: 0.5rem 1.5rem;
}

.workspace-context-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem;
  max-width: 1440px;
}

.ws-field {
  min-width: 160px;
  flex: 1 1 180px;
}

.ws-field span {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary);
  margin-bottom: 0.25rem;
}

.btn-icon {
  min-width: 2.25rem;
  padding: 0.45rem 0.6rem;
}

.workspace-docs-details {
  flex: 1 1 220px;
  font-size: 0.85rem;
}

.workspace-docs-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 0.35rem;
}

.workspace-doc-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-height: 140px;
  overflow-y: auto;
  margin-top: 0.35rem;
}

.workspace-doc-item {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  font-size: 0.82rem;
  padding: 0.25rem 0;
}

.workspace {
  margin-left: var(--sidebar-w);
  padding: calc(var(--topbar-h) + var(--context-bar-h) + 1.5rem) 1.5rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 1.5rem;
  min-height: 100vh;
  max-width: 1440px;
}

.col { display: flex; flex-direction: column; gap: 1rem; min-width: 0; }

.section-label {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--secondary);
}

.card {
  background: var(--surface-elevated);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-xl);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
}

.card-tall { flex: 1; display: flex; flex-direction: column; }
.card-grow { flex: 1; overflow: auto; }
.card-title { margin: 0 0 0.75rem; font-weight: 600; font-size: 0.95rem; }
.card-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.card-header h2 { margin: 0; font-size: 1.1rem; }

.step-badge {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--primary-fixed);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-secondary { background: var(--surface-elevated); border-color: var(--outline-variant); color: var(--on-surface); }
.btn-ghost { background: transparent; border-color: var(--outline-variant); color: var(--secondary); text-decoration: none; }
.btn-block { width: 100%; margin-top: 0.5rem; }

.input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  font: inherit;
  font-size: 0.9rem;
  background: var(--surface-elevated);
  color: var(--on-surface);
}

.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--input-focus-ring);
}

.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.5rem;
  padding: 1rem;
  border: 1px dashed var(--outline-variant);
  border-radius: 8px;
  color: var(--secondary);
  cursor: pointer;
  font-size: 0.875rem;
}

.upload-zone:hover { background: var(--surface-container-low); }

.status-text {
  margin: 0.5rem 0 0;
  font-size: 0.82rem;
  color: var(--secondary);
  line-height: 1.4;
}

.controls-panel {
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  padding: 1rem;
  margin-bottom: 1rem;
}

.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.field { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.82rem; color: var(--secondary); }
.field-wide { grid-column: 1 / -1; }

.controls-actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 0.75rem; flex-wrap: wrap; }

.btn-present-pulse {
  animation: present-pulse 1.2s ease-in-out 2;
}

@keyframes present-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(26, 115, 232, 0.45); }
  50% { box-shadow: 0 0 0 6px rgba(26, 115, 232, 0); }
}

.presenter-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.presenter-overlay.hidden {
  display: none;
}

.presenter-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 12, 16, 0.92);
}

.presenter-shell {
  position: relative;
  z-index: 1;
  width: min(96vw, 1100px);
  max-height: 96vh;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.presenter-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #f5f7fa;
}

.presenter-counter {
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.presenter-toolbar-actions {
  display: flex;
  gap: 0.25rem;
}

.presenter-stage {
  aspect-ratio: 16 / 9;
  background: #1a1d21;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
}

.presenter-slide {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  box-sizing: border-box;
  overflow: auto;
}

.presenter-slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
}

.presenter-slide .lesson-slide {
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
}

.presenter-fade {
  animation: presenter-fade 150ms ease;
}

@keyframes presenter-fade {
  from { opacity: 0.35; }
  to { opacity: 1; }
}

.presenter-notes {
  color: #d8dee6;
  font-size: 0.85rem;
  max-width: 920px;
  margin: 0 auto;
}

.presenter-notes-text {
  margin: 0.35rem 0 0;
  line-height: 1.45;
}

.slide-demo-tip {
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  color: var(--on-surface-variant);
}

.region-loading-host,
.card-ingest,
.card-chat,
.lessons-main-card,
.coach-panel-wrap,
.coach-debug-card,
.controls-panel,
.lessons-rail-controls {
  position: relative;
}

.slide-canvas {
  position: relative;
  flex: 1;
  min-height: 320px;
  border: 2px dashed var(--outline-variant);
  border-radius: var(--radius-xl);
  background: var(--slide-canvas-bg);
  overflow: auto;
  padding: 1rem;
}

.slide-canvas-content {
  min-height: 280px;
}

.region-loading {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  pointer-events: none;
}

.region-loading-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

.studio-spinner,
.canvas-spinner,
.lesson-running-spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--outline-variant);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: studio-spin 0.9s linear infinite;
  flex-shrink: 0;
}

.region-loading-text,
.canvas-overlay-text {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--secondary);
}

.region-loading-hint,
.canvas-overlay-hint {
  margin: 0;
  font-size: 0.78rem;
  color: var(--secondary);
  opacity: 0.85;
}

@keyframes studio-spin {
  to { transform: rotate(360deg); }
}

.btn.is-loading {
  opacity: 0.85;
  pointer-events: none;
}

.progress-panel {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  background: var(--surface-container-low);
  font-size: 0.875rem;
}

.progress-panel-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
  color: var(--secondary);
  font-weight: 600;
}

.progress-bar-track {
  height: 6px;
  background: var(--surface-container);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-container));
  border-radius: 999px;
  transition: width 0.4s ease;
}

.progress-current {
  margin: 0 0 0.35rem;
  font-weight: 600;
  color: var(--primary);
}

.progress-steps {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.35rem;
}

.progress-step.pending { color: var(--secondary); }
.progress-step.active { color: var(--primary); font-weight: 600; }
.progress-step.done { color: var(--progress-done); }

.progress-log {
  margin: 0.75rem 0 0;
  padding: 0.75rem;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  white-space: pre-wrap;
  font-size: 0.8rem;
  max-height: 220px;
  overflow: auto;
}

@media (max-width: 1100px) {
  .workspace { grid-template-columns: 1fr; }
  .col-research, .col-studio { order: 2; }
  .col-slides { order: 1; }
}

.studio-canvas-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 280px;
  color: var(--secondary);
  text-align: center;
  padding: 1rem;
}

.studio-canvas-inner { font-size: 0.95rem; line-height: 1.5; }

.downloads {
  margin-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.downloads a {
  font-size: 0.82rem;
  color: var(--primary);
}

.studio-badge {
  font-size: 0.62rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  text-transform: uppercase;
}

.studio-badge-rag { background: var(--primary-fixed); color: var(--badge-rag-text); }
.studio-badge-muted { background: var(--surface-container); color: var(--secondary); }

.studio-doc-header { margin-bottom: 0.5rem; }
.studio-doc-list { display: flex; flex-direction: column; gap: 0.5rem; }

.studio-doc-card {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem;
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  background: var(--surface-elevated);
}

.studio-doc-card:hover { border-color: var(--primary); }
.studio-doc-icon { color: var(--primary); font-size: 1.25rem; }
.studio-doc-title { margin: 0; font-size: 0.875rem; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.studio-doc-meta { margin: 0.15rem 0 0; font-size: 0.68rem; color: var(--secondary); }

.studio-empty-docs { font-size: 0.85rem; color: var(--secondary); margin: 0; }

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem;
  background: var(--surface-container-low);
  border-radius: 8px;
  font-size: 0.875rem;
}

.mode-cards { display: flex; flex-direction: column; gap: 0.35rem; }

.mode-card {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  background: var(--surface-elevated);
  font: inherit;
  cursor: pointer;
  text-align: left;
  color: var(--on-surface);
}

.mode-card.active {
  background: var(--primary-fixed);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

.voice-reply {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--on-surface);
  white-space: pre-wrap;
}

.studio-coach-panel {
  margin-top: 0.75rem;
  padding: 1rem;
  border-radius: var(--radius-lg);
  background: var(--inverse-surface);
  color: var(--inverse-on-surface);
  font-size: 0.85rem;
}

.studio-coach-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.studio-coach-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.85;
}

.studio-coach-tag {
  font-size: 0.65rem;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.studio-coach-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: #ef4444;
  display: inline-block;
  margin-right: 0.35rem;
  animation: pulse 1.2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.studio-coach-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.studio-metric {
  padding: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.studio-metric-label {
  margin: 0;
  font-size: 0.62rem;
  text-transform: uppercase;
  opacity: 0.65;
}

.studio-metric-value {
  margin: 0.25rem 0 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-fixed);
}

.studio-coach-tip {
  margin: 0;
  font-style: italic;
  opacity: 0.85;
  line-height: 1.45;
}

.studio-coach-hint { margin: 0; opacity: 0.8; line-height: 1.45; }

.workspace[data-view="research"] .col-slides,
.workspace[data-view="research"] .col-studio,
.workspace[data-view="research"] .col-quiz { display: none; }
.workspace[data-view="research"] {
  grid-template-columns: 1fr;
  max-width: 1120px;
}

.label-compact,
.research-rail-footer,
.research-doc-count { display: none; }

.research-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.25rem;
  width: 100%;
}

.research-sources,
.research-chat {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.research-sources-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.research-doc-count {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: var(--surface-container);
  color: var(--secondary);
  white-space: nowrap;
}

.ingest-url-row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.35rem;
}

.ingest-url-row .btn { margin-top: 0; white-space: nowrap; }

.ingest-url-caption { margin-top: 0.35rem; }

/* Slides view: compact left-rail research (sources only) */
.workspace[data-view="slides"] .research-layout {
  grid-template-columns: 1fr;
}

.workspace[data-view="slides"] .research-chat {
  display: none;
}

.workspace[data-view="slides"] .label-full { display: none; }
.workspace[data-view="slides"] .label-compact { display: inline; }
.workspace[data-view="slides"] .research-rail-footer { display: block; }
.workspace[data-view="slides"] .research-doc-count { display: inline-block; }
.workspace[data-view="slides"] .ingest-hint-full { display: none; }

.workspace[data-view="slides"] .col-research {
  gap: 0.65rem;
}

.workspace[data-view="slides"] .card-ingest,
.workspace[data-view="slides"] .card-docs-rail {
  padding: 0.75rem;
}

.workspace[data-view="slides"] .card-ingest .card-title,
.workspace[data-view="slides"] .card-docs-rail .card-title {
  font-size: 0.88rem;
  margin-bottom: 0.5rem;
}

.workspace[data-view="slides"] .ingest-workflow-field span {
  font-size: 0.72rem;
}

.workspace[data-view="slides"] .ingest-url-row {
  flex-direction: row;
  align-items: stretch;
}

.workspace[data-view="slides"] .ingest-url-row .input {
  flex: 1;
  min-width: 0;
  padding: 0.5rem 0.6rem;
  font-size: 0.82rem;
}

.workspace[data-view="slides"] .ingest-url-row .btn {
  flex: 0 0 auto;
  padding: 0.5rem 0.75rem;
}

.workspace[data-view="slides"] .ingest-url-caption {
  display: none;
}

.workspace[data-view="slides"] .upload-zone-compact {
  flex-direction: row;
  justify-content: center;
  padding: 0.55rem 0.65rem;
  margin-top: 0.35rem;
  font-size: 0.8rem;
}

.workspace[data-view="slides"] .upload-zone-compact .material-symbols-outlined {
  font-size: 1.1rem;
}

.workspace[data-view="slides"] .url-choices-list {
  max-height: 110px;
}

.workspace[data-view="slides"] .url-choices-panel {
  padding: 0.5rem;
}

.workspace[data-view="slides"] .documents-panel-scroll {
  max-height: 160px;
  overflow-y: auto;
}

.workspace[data-view="slides"] .card-docs-rail {
  flex: 0 1 auto;
}

.workspace[data-view="slides"] .research-rail-footer {
  margin-top: auto;
  padding-top: 0.25rem;
}

.workspace[data-view="slides"] .research-rail-link {
  font-size: 0.82rem;
  justify-content: center;
}

.workspace[data-view="research"] .research-rail-footer {
  display: none;
}

.workspace[data-view="research"] .ingest-url-row .btn {
  width: 100%;
}

.workspace[data-view="research"] .ingest-url-row .btn::after {
  content: " selected sources";
}

.workspace[data-view="research"] .ingest-url-caption {
  display: block;
}

.ingest-action-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0.5rem 0;
}

.url-choices-panel {
  margin: 0.5rem 0 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  background: var(--surface-container-low);
}

.url-choices-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.url-choices-head .card-title { margin: 0; }

.url-select-all {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: var(--secondary);
  cursor: pointer;
  white-space: nowrap;
}

.url-choices-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-height: 180px;
  overflow-y: auto;
}

.url-choice-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.8rem;
  line-height: 1.35;
  padding: 0.35rem 0.25rem;
  border-radius: 6px;
}

.url-choice-item:hover { background: var(--hover-overlay); }

.url-choice-item span {
  word-break: break-all;
  color: var(--on-surface);
}

.card-chat {
  display: flex;
  flex-direction: column;
  min-height: 420px;
}

.card-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.rag-badge {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: var(--secondary-container);
  color: var(--on-secondary-container);
}

.research-chat-messages {
  flex: 1;
  min-height: 220px;
  max-height: 360px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
  padding: 0.5rem;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  background: var(--surface-container-low);
}

.research-chat-empty {
  margin: auto;
  text-align: center;
  font-size: 0.85rem;
  color: var(--secondary);
  line-height: 1.45;
  padding: 1rem;
}

.research-chat-bubble {
  max-width: 95%;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  font-size: 0.86rem;
  line-height: 1.45;
}

.research-chat-user {
  align-self: flex-end;
  background: var(--primary-fixed);
  color: var(--on-surface);
}

.research-chat-assistant {
  align-self: flex-start;
  background: var(--surface-elevated);
  border: 1px solid var(--outline-variant);
}

.research-chat-role {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary);
  margin-bottom: 0.25rem;
}

@media (max-width: 960px) {
  .research-layout { grid-template-columns: 1fr; }
}

.workspace[data-view="language-lessons"] .col-research,
.workspace[data-view="language-lessons"] .col-slides,
.workspace[data-view="language-lessons"] .col-quiz { display: none; }

.view-quiz-only { display: none; }

.workspace[data-view="quiz"] .col-research,
.workspace[data-view="quiz"] .col-slides,
.workspace[data-view="quiz"] .col-studio,
.workspace[data-view="quiz"] .col-debug { display: none; }

.workspace[data-view="quiz"] {
  grid-template-columns: minmax(0, 1fr);
  max-width: 960px;
  gap: 1.25rem;
}

.workspace[data-view="quiz"] .col-quiz {
  display: block;
  grid-column: 1 / -1;
  width: 100%;
  min-width: 0;
}

.workspace[data-view="quiz"] .quiz-preview-inner {
  font-size: 0.92rem;
}

.quiz-preview-frame {
  width: 100%;
  min-height: 520px;
  border: 1px solid var(--border-subtle, #ddd);
  border-radius: 8px;
  background: #fff;
}

.slides-to-quiz {
  margin-top: 0.75rem;
  text-align: left;
}

.workspace[data-view="language-lessons"] .col-debug { display: none; }

.view-lessons-only { display: none; }

.workspace[data-view="language-lessons"] {
  grid-template-columns: minmax(0, 1fr);
  max-width: 1280px;
  gap: 1.25rem;
}

.workspace[data-view="language-lessons"] .col-studio {
  grid-column: 1 / -1;
  width: 100%;
  min-width: 0;
}

.workspace[data-view="language-lessons"] .lessons-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1.22fr);
  gap: 1.25rem;
  align-items: start;
  width: 100%;
}

.workspace[data-view="language-lessons"] .lessons-rail {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.workspace[data-view="language-lessons"] .lessons-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.workspace[data-view="language-lessons"] .lessons-pitch-analysis {
  margin: 0;
}

.workspace[data-view="language-lessons"] .lessons-pitch-analysis[open] .lessons-pitch-summary {
  margin-bottom: 0.75rem;
}

.workspace[data-view="language-lessons"] .lessons-pitch-summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.workspace[data-view="language-lessons"] .lessons-pitch-summary::-webkit-details-marker {
  display: none;
}

.workspace[data-view="language-lessons"] .lessons-pitch-summary-hint {
  font-size: 0.84rem;
  color: var(--secondary);
  font-weight: 400;
}

.workspace[data-view="language-lessons"] .lessons-pitch-analysis .coach-panel-wrap {
  padding-top: 0.25rem;
}

.workspace[data-view="language-lessons"] .lessons-discuss-btn {
  margin-top: 0.75rem;
}

.workspace[data-view="language-lessons"] .coach-results-panel {
  min-height: 80px;
  margin-top: 0.75rem;
  overflow-y: auto;
}

.workspace[data-view="language-lessons"] .coach-results-panel:not(:empty) {
  border-top: 1px solid var(--outline-variant);
  padding-top: 0.75rem;
}

.workspace[data-view="language-lessons"] .lessons-main-card {
  display: flex;
  flex-direction: column;
}

.workspace[data-view="language-lessons"] .lessons-compose {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.workspace[data-view="language-lessons"] .lessons-compose .field {
  margin: 0;
}

.workspace[data-view="language-lessons"] .lessons-compose textarea {
  min-height: 3.25rem;
  resize: vertical;
}

.workspace[data-view="language-lessons"] .lessons-rail .lessons-mode-cards {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.workspace[data-view="language-lessons"] .lessons-rail .lessons-mode-cards .mode-card {
  flex: 1 1 calc(33.333% - 0.35rem);
  text-align: center;
  justify-content: center;
  min-width: 0;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

.workspace[data-view="language-lessons"] .lessons-rail-controls .lessons-topic-wrap {
  margin: 0 0 0.75rem;
}

.workspace[data-view="language-lessons"] .lessons-rag-sources {
  margin: 0;
}

.workspace[data-view="language-lessons"] .lessons-rag-sources summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.82rem;
}

.workspace[data-view="language-lessons"] .lessons-chat-messages {
  min-height: 160px;
  max-height: min(260px, 32vh);
  margin: 0 0 0.75rem;
}

.workspace[data-view="language-lessons"] .lessons-input-toolbar {
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  background: var(--surface-container-low);
  margin-bottom: 0.65rem;
}

.workspace[data-view="language-lessons"] .lessons-recording-row {
  margin: 0;
}

.workspace[data-view="language-lessons"] .lessons-record-status {
  margin: 0.35rem 0 0;
  min-height: 1.1rem;
}

.workspace[data-view="language-lessons"] .lessons-send-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.workspace[data-view="language-lessons"] .lessons-card-head {
  margin-bottom: 0.85rem;
}

.workspace[data-view="language-lessons"] .lessons-card-head .section-label {
  margin-bottom: 0.35rem;
}

.lessons-card-desc {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--secondary);
}

@media (max-width: 960px) {
  .workspace[data-view="language-lessons"] .lessons-layout {
    grid-template-columns: 1fr;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
  }

  .workspace[data-view="language-lessons"] .lessons-rail .lessons-mode-cards {
    flex-direction: column;
  }

  .workspace[data-view="language-lessons"] .lessons-rail .lessons-mode-cards .mode-card {
    flex: 1 1 auto;
    text-align: left;
    justify-content: space-between;
  }

  .workspace[data-view="language-lessons"] .lessons-send-row {
    grid-template-columns: 1fr;
  }
}

.workspace[data-view="slides"] .col-studio,
.workspace[data-view="slides"] .col-quiz,
.workspace[data-view="research"] .col-debug { display: none; }

.coach-card-head {
  margin-bottom: 0.85rem;
}

.coach-card-head .section-label {
  margin-bottom: 0.35rem;
}

.coach-card-desc {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--secondary);
}

.coach-capture-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
  margin-bottom: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  background: var(--surface-container-low);
}

.coach-recording-row {
  margin: 0;
}

.coach-record-status {
  margin: 0.35rem 0 0;
  min-height: 1.25rem;
}

.coach-upload-field {
  margin: 0;
}

.coach-upload-field input[type="file"] {
  font-size: 0.78rem;
}

.coach-voiceout-toggle {
  margin: 0.75rem 0;
}

.coach-analyze-btn {
  margin-top: 0.25rem;
}

@media (max-width: 960px) {
  .coach-capture-row {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) {
  .workspace-context-mobile .workspace-context-inner {
    display: flex !important;
  }
}

@media (max-width: 768px) {
  :root {
    --sidebar-w: 0px;
    --topbar-h: 52px;
    --context-bar-h: 44px;
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    width: min(280px, 85vw);
    z-index: 60;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-close,
  .topbar-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.5rem;
    min-height: 2.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--secondary);
    border-radius: 8px;
    flex-shrink: 0;
  }

  .topbar-icon:active,
  .sidebar-close:active {
    background: var(--surface-container-low);
  }

  .topbar {
    left: 0;
    right: 0;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 0.35rem 0.5rem;
    padding: 0 0.75rem;
    padding-top: env(safe-area-inset-top, 0);
    height: auto;
    min-height: var(--topbar-h);
  }

  .breadcrumb > span:first-child,
  .breadcrumb .crumb-sep {
    display: none;
  }

  .breadcrumb strong {
    border-bottom: none;
    padding-bottom: 0;
    font-size: 0.95rem;
    font-weight: 600;
  }

  .topbar-classic-link,
  .topbar-export {
    display: none !important;
  }

  body[data-view="slides"] .topbar-export:not(:disabled) {
    display: inline-flex !important;
  }

  .topbar-actions {
    gap: 0.25rem;
  }

  .topbar-actions .btn-icon {
    min-width: 2.5rem;
    min-height: 2.5rem;
    padding: 0.4rem;
  }

  .workspace-context-bar {
    left: 0;
    padding: 0;
  }

  .workspace-context-summary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.75rem;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--on-surface);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }

  .workspace-context-summary-icon {
    font-size: 1.1rem;
    color: var(--secondary);
    flex-shrink: 0;
  }

  .workspace-context-summary-text {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .workspace-context-chevron {
    font-size: 1.25rem;
    color: var(--secondary);
    flex-shrink: 0;
    transition: transform 0.2s ease;
  }

  .workspace-context-mobile[open] .workspace-context-chevron {
    transform: rotate(180deg);
  }

  .workspace-context-mobile[open] .workspace-context-inner {
    padding: 0 0.75rem 0.75rem;
    border-top: 1px solid var(--outline-variant);
  }

  .workspace-context-mobile:not([open]) .workspace-context-inner {
    display: none;
  }

  .workspace-context-inner .ws-field {
    flex: 1 1 100%;
    min-width: 0;
  }

  .workspace {
    margin-left: 0;
    padding: calc(var(--topbar-h) + var(--context-bar-h) + 0.75rem) 0.75rem 1rem;
  }

  .studio-banner {
    left: 0;
  }

  .workspace-context-bar,
  .topbar {
    padding-left: max(0.75rem, env(safe-area-inset-left));
    padding-right: max(0.75rem, env(safe-area-inset-right));
  }

  .card {
    padding: 0.85rem;
    border-radius: var(--radius-lg);
  }

  .controls-grid {
    grid-template-columns: 1fr;
  }

  .section-label {
    font-size: 0.68rem;
  }
}

/* Parity additions */
.studio-gallery-strip {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.75rem 0;
  margin-top: 0.5rem;
}

.studio-gallery-item {
  flex: 0 0 auto;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--outline-variant);
}

.studio-gallery-item img {
  display: block;
  height: 72px;
  width: auto;
}

.slide-outline-details,
.slide-export-help {
  margin-top: 0.75rem;
}

.slide-outline-details summary,
.slide-export-help summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
}

.slide-outline {
  margin-top: 0.5rem;
  padding: 0.75rem;
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  background: var(--surface-elevated);
  font-size: 0.875rem;
  line-height: 1.5;
  max-height: 240px;
  overflow-y: auto;
}

.theme-toggle {
  margin-bottom: 0.25rem;
}

.debug-rag-scope {
  margin: 0.75rem 0;
}

.debug-rag-scope summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
}

.debug-session-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.debug-session-row .input {
  flex: 1;
}

.debug-doc-list {
  margin: 0.5rem 0;
  max-height: 140px;
  overflow-y: auto;
}

.studio-debug-trace {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
}

.studio-debug-trace summary {
  cursor: pointer;
  color: var(--secondary);
  font-weight: 600;
}

.studio-trace-summary,
.studio-trace-json,
.studio-trace-log {
  font-size: 0.75rem;
  white-space: pre-wrap;
  overflow-x: auto;
  max-height: 240px;
  background: var(--surface-container-low);
  padding: 0.5rem;
  border-radius: 8px;
  margin-top: 0.5rem;
}

.slide-source-details {
  margin: 0.75rem 0;
  font-size: 0.875rem;
}

.slide-source-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--secondary);
}

.recording-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin: 0.5rem 0;
}

.input-compact {
  font-size: 0.8125rem;
  max-width: 160px;
}

.lessons-audio-out audio,
.studio-coach-voiceout audio {
  width: 100%;
  margin-top: 0.5rem;
}

.lessons-chat-messages {
  max-height: 220px;
  margin: 0.75rem 0;
}

.lessons-rag-sources {
  margin: 0.75rem 0;
}

.lessons-rag-sources summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
}

.voice-rag-refs {
  margin-top: 0.65rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--outline-variant);
  font-size: 0.82rem;
  color: var(--on-surface-variant);
}

.lessons-replay-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.lessons-replay-row .btn-ghost {
  margin-left: auto;
}

.studio-coach-transcript {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.5;
}

.studio-coach-charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.studio-coach-chart {
  margin: 0;
}

.studio-coach-chart img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--outline-variant);
}

.studio-coach-chart figcaption {
  font-size: 0.75rem;
  color: var(--secondary);
  margin-bottom: 0.25rem;
}

.studio-coach-voiceout-label {
  font-size: 0.8125rem;
  font-weight: 600;
  margin: 0.5rem 0 0.25rem;
}

.workspace-memory {
  margin-top: 0.35rem;
  font-size: 0.8125rem;
}

.settings-drawer {
  position: fixed;
  inset: 0;
  z-index: 200;
}

.settings-drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}

.settings-drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(360px, 92vw);
  height: 100%;
  background: var(--surface);
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
  padding: 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.settings-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.settings-drawer-head h2 {
  margin: 0;
  font-size: 1.125rem;
}

.settings-status {
  font-size: 0.875rem;
  line-height: 1.5;
}

.settings-pre {
  font-size: 0.75rem;
  white-space: pre-wrap;
  margin: 0.5rem 0 0;
}

.settings-details summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
}

.coach-presets {
  margin-top: 0;
}

.workspace[data-view="debug"] .view-debug-only { display: block; }

.workspace[data-view="debug"] .col-research,
.workspace[data-view="debug"] .col-slides,
.workspace[data-view="debug"] .col-studio,
.workspace[data-view="debug"] .col-quiz { display: none; }

.workspace[data-view="debug"] {
  grid-template-columns: 1fr;
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

.workspace[data-view="debug"] .col-debug {
  width: 100%;
}

.workspace[data-view="debug"] .coach-debug-card {
  min-height: calc(100vh - var(--topbar-h) - var(--context-bar-h) - 2rem);
}

.debug-chat-messages {
  min-height: 280px;
  max-height: min(480px, 50vh);
}

.lessons-rail-card .field + .field {
  margin-top: 0.65rem;
}

.lessons-input-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.5rem;
}

.lessons-hold-mic.is-recording {
  background: var(--primary-container);
  color: var(--on-primary-container);
}

.lessons-upload-btn {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.lessons-auto-speak {
  margin: 0;
  flex: 1 1 auto;
  justify-content: flex-end;
}

.lessons-send-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  margin-top: 0.65rem;
}

.lessons-chat-messages .chat-audio-inline {
  margin-top: 0.5rem;
  width: 100%;
}

.lessons-classic-link {
  margin-top: 0.75rem;
  text-align: center;
}

.lessons-classic-link a {
  color: var(--primary);
}

.lessons-message-user::before {
  content: "You · ";
  font-weight: 600;
  opacity: 0.75;
}

.lessons-message-assistant::before {
  content: "Teacher · ";
  font-weight: 600;
  opacity: 0.75;
}

.btn-compact {
  padding-inline: 0.65rem;
  font-size: 0.82rem;
}