/* ============================================================
   VICTORY FLUENT FORUM — VFF TEACHING STUDIO CSS
   File: tools/online-whiteboard/whiteboard.css
   Version: 4.1.0 (Warm-Neutral Premium SaaS Workspace, Distinct Canvas Separation)
   ============================================================ */

:root {
  --wb-font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --wb-shell-bg: #ffffff;
  --wb-workspace-bg: #f1f5f9;
  --wb-canvas-bg: #ffffff;
  --wb-toolbar-bg: #ffffff;
  --wb-toolbar-border: #e2e8f0;
  --wb-toolbar-shadow: 0 1px 3px rgba(15, 23, 42, 0.04), 0 6px 20px -3px rgba(15, 23, 42, 0.06);
  --wb-card-bg: #ffffff;
  --wb-btn-hover: #f1f5f9;
  --wb-btn-active-bg: #0f172a;
  --wb-btn-active-color: #ffffff;
  --wb-text-dark: #0f172a;
  --wb-text-secondary: #334155;
  --wb-text-muted: #64748b;
  --wb-border-light: #cbd5e1;
  --wb-canvas-border: #334155;
  --wb-app-border: rgba(15, 23, 42, 0.18);
  --wb-primary: #2563eb;
  --wb-primary-dark: #1d4ed8;
  --wb-primary-light: #dbeafe;
  --wb-accent-green: #10b981;
  --wb-accent-amber: #f59e0b;
  --wb-accent-red: #ef4444;
  --wb-accent-indigo: #6366f1;
  --wb-accent-teal: #0d9488;
  --wb-radius-sm: 6px;
  --wb-radius-md: 8px;
  --wb-radius-lg: 12px;
  --wb-radius-xl: 18px;
  --wb-transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --wb-shell-bg: #0f172a;
  --wb-workspace-bg: #080c14;
  --wb-canvas-bg: #ffffff; /* High-contrast white canvas preserved for clear teaching/materials */
  --wb-toolbar-bg: #0f172a;
  --wb-toolbar-border: #1e293b;
  --wb-toolbar-shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 8px 28px -4px rgba(0, 0, 0, 0.6);
  --wb-card-bg: #131b2c;
  --wb-btn-hover: #1e293b;
  --wb-btn-active-bg: #2563eb;
  --wb-btn-active-color: #ffffff;
  --wb-text-dark: #f8fafc;
  --wb-text-secondary: #cbd5e1;
  --wb-text-muted: #94a3b8;
  --wb-border-light: #334155;
  --wb-canvas-border: #475569;
  --wb-app-border: rgba(255, 255, 255, 0.15);
  --wb-primary: #3b82f6;
  --wb-primary-dark: #1d4ed8;
  --wb-primary-light: rgba(37, 99, 235, 0.2);
}

/* ============================================================
   TEACHER-FIRST STUDIO HERO SECTION (PHASE 2A)
   ============================================================ */
.wb-hero-section {
  padding: 22px 16px 26px !important;
  position: relative;
  overflow: hidden;
  background: #ffffff;
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

[data-theme="dark"] .wb-hero-section {
  background: #0b0f19;
  border-bottom-color: #1e293b;
}

@media (max-width: 768px) {
  .wb-hero-section {
    padding: 16px 14px 18px !important;
  }
}

.wb-hero-breadcrumb {
  margin-bottom: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--th-text-muted, #64748b);
}

.wb-hero-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 28px;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
}

.wb-hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.wb-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: #f1f5f9;
  color: #0f172a;
  border: 1px solid #e2e8f0;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  margin-bottom: 8px;
  user-select: none;
}

[data-theme="dark"] .wb-hero-badge {
  background: #1e293b;
  color: #f1f5f9;
  border-color: #334155;
}

.wb-badge-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: wbPulse 2s infinite;
}

@keyframes wbPulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.wb-badge-version {
  background: #0f172a;
  color: #ffffff;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.65rem;
}

[data-theme="dark"] .wb-badge-version {
  background: #334155;
}

.wb-hero-title {
  font-size: clamp(1.45rem, 2.2vw, 2.05rem);
  font-weight: 800;
  color: var(--th-text-main, #0f172a);
  margin: 0 0 6px;
  line-height: 1.18;
  letter-spacing: -0.3px;
}

[data-theme="dark"] .wb-hero-title {
  color: #f8fafc;
}

.wb-hero-gradient {
  background: linear-gradient(135deg, #2563eb 0%, #0d9488 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

[data-theme="dark"] .wb-hero-gradient {
  background: linear-gradient(135deg, #60a5fa 0%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.wb-hero-sub {
  font-size: 0.92rem;
  color: var(--th-text-muted, #475569);
  max-width: 680px;
  margin: 0 0 12px;
  line-height: 1.42;
}

[data-theme="dark"] .wb-hero-sub {
  color: #94a3b8;
}

.wb-hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.wb-hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  color: var(--wb-text-dark, #0f172a);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.16s ease;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  text-decoration: none;
  font-family: inherit;
}

[data-theme="dark"] .wb-hero-chip {
  background: #1e293b;
  color: #f1f5f9;
  border-color: #334155;
}

.wb-hero-chip i {
  font-size: 0.82rem;
}

.wb-hero-chip[data-subject="general"] i { color: #ef4444; }
.wb-hero-chip[data-subject="math"] i { color: #2563eb; }
.wb-hero-chip[data-subject="science"] i { color: #0d9488; }
.wb-hero-chip[data-subject="english"] i { color: #0284c7; }
.wb-hero-chip[data-subject="speech"] i { color: #f59e0b; }
.wb-hero-chip[data-action="presentation"] i { color: #6366f1; }

.wb-hero-chip:hover {
  transform: translateY(-1px);
  border-color: #cbd5e1;
  color: #0f172a;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

[data-theme="dark"] .wb-hero-chip:hover {
  border-color: #64748b;
  color: #ffffff;
  background: #273549;
}

.wb-hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.wb-hero-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #0f172a;
  color: #ffffff !important;
  font-weight: 800;
  font-size: 0.88rem;
  padding: 9px 20px;
  border-radius: 999px;
  text-decoration: none !important;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.18);
  transition: all 0.18s ease;
  cursor: pointer;
  border: 1px solid #0f172a;
  font-family: inherit;
}

[data-theme="dark"] .wb-hero-btn-primary {
  background: #2563eb;
  border-color: #2563eb;
}

.wb-hero-btn-primary:hover {
  background: #1e293b;
  border-color: #1e293b;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.25);
}

[data-theme="dark"] .wb-hero-btn-primary:hover {
  background: #1d4ed8;
  border-color: #1d4ed8;
}

.wb-hero-btn-primary:active {
  transform: translateY(0);
}

.wb-btn-arrow {
  font-size: 0.75rem;
  transition: transform 0.15s ease;
}

.wb-hero-btn-primary:hover .wb-btn-arrow {
  transform: translateY(1px);
}

.wb-hero-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: #ffffff;
  color: var(--wb-text-dark, #0f172a);
  font-weight: 700;
  font-size: 0.84rem;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1.5px solid var(--wb-toolbar-border, #cbd5e1);
  cursor: pointer;
  transition: all 0.16s ease;
  font-family: inherit;
}

[data-theme="dark"] .wb-hero-btn-secondary {
  background: #1e293b;
  color: #f8fafc;
  border-color: #475569;
}

.wb-hero-btn-secondary:hover {
  border-color: #94a3b8;
  color: #0f172a;
  background: #f8fafc;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.05);
}

[data-theme="dark"] .wb-hero-btn-secondary:hover {
  border-color: #64748b;
  color: #ffffff;
  background: #273549;
}

.wb-hero-reassurance {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.76rem;
  font-weight: 700;
  color: #10b981;
  margin-left: 2px;
}

[data-theme="dark"] .wb-hero-reassurance {
  color: #34d399;
}

/* Mini Interactive Digital Classroom Slate Preview Card */
.wb-hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.wb-preview-slate-card {
  width: 100%;
  max-width: 330px;
  background: linear-gradient(145deg, #133827, #0d261a);
  border: 2px solid #235e43;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  user-select: none;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.wb-preview-slate-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
}

.wb-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.wb-preview-swatches {
  display: flex;
  align-items: center;
  gap: 5px;
}

.wb-preview-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  box-sizing: border-box;
}

.dot-green { background: #10b981; border: 1px solid #ffffff; }
.dot-slate { background: #18181b; }
.dot-cream { background: #fdfbf7; }
.dot-white { background: #ffffff; }

.wb-preview-tag {
  font-size: 0.65rem;
  font-weight: 800;
  color: #a7f3d0;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.wb-preview-canvas {
  padding: 10px;
  min-height: 125px;
  position: relative;
  background-image: radial-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px);
  background-size: 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.wb-preview-worksheet {
  background: #ffffff;
  color: #0f172a;
  border-radius: 6px;
  padding: 6px 8px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
  border-left: 3px solid #2563eb;
}

.wb-worksheet-title {
  font-size: 0.65rem;
  font-weight: 800;
  color: #2563eb;
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 3px;
}

.wb-worksheet-axis {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.62rem;
  font-family: monospace;
  color: #64748b;
}

.axis-grid {
  flex: 1;
  height: 22px;
  background: #f8fafc;
  border-left: 1.5px solid #64748b;
  border-bottom: 1.5px solid #64748b;
  position: relative;
}

.axis-curve {
  width: 100%;
  height: 100%;
  display: block;
}

.wb-preview-annotation {
  display: flex;
  align-items: center;
}

.wb-annotation-callout {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(254, 240, 138, 0.95);
  color: #854d0e;
  border: 1px solid #facc15;
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 0.68rem;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.wb-annotation-callout i {
  color: #ca8a04;
}

.wb-preview-sticky {
  align-self: flex-end;
  background: #fef08a;
  color: #713f12;
  border-radius: 4px;
  padding: 4px 7px;
  font-size: 0.62rem;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
  transform: rotate(-1.5deg);
}

.wb-sticky-header {
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: #a16207;
  margin-bottom: 1px;
}

.wb-preview-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 8px;
  background: rgba(0, 0, 0, 0.4);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.wb-preview-pill {
  font-size: 0.62rem;
  font-weight: 700;
  color: #e2e8f0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.wb-preview-pill i {
  color: #10b981;
}

/* Responsive Media Queries for Hero */
@media (max-width: 960px) {
  .wb-hero-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .wb-hero-content {
    align-items: center;
    text-align: center;
  }
  .wb-hero-chips,
  .wb-hero-actions {
    justify-content: center;
  }
  .wb-hero-visual {
    display: none;
  }
}

@media (max-width: 600px) {
  .wb-hero-section {
    padding: 8px 10px 10px !important;
  }
  .wb-hero-title {
    font-size: 1.38rem;
  }
  .wb-hero-sub {
    font-size: 0.84rem;
    margin-bottom: 8px;
  }
  .wb-hero-chips {
    gap: 4px;
    margin-bottom: 10px;
  }
  .wb-hero-chip {
    padding: 3px 8px;
    font-size: 0.72rem;
  }
  .wb-hero-btn-primary {
    padding: 7px 14px;
    font-size: 0.82rem;
  }
  .wb-hero-btn-secondary {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
}

/* ============================================================
   STRUCTURAL AD INVENTORY SLOTS
   ============================================================ */
.vff-ad-slot {
  display: block;
  width: 100%;
  max-width: 970px;
  margin: 3px auto;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

.vff-ad-slot:empty {
  display: none !important;
  min-height: 0;
  margin: 0;
}

#vffAdTop {
  margin-top: 2px;
  margin-bottom: 3px;
}

#vffAdBottom {
  margin-top: 10px;
  margin-bottom: 20px;
}

/* ============================================================
   VFF TEACHING STUDIO APPLICATION SHELL (PREMIUM SAAS WORKSPACE)
   ============================================================ */
.wb-studio-main-container {
  padding-top: 36px;
  padding-bottom: 40px;
  max-width: 1680px !important;
  width: 98% !important;
  margin: 0 auto;
}

@media (max-width: 1024px) {
  .wb-studio-main-container {
    padding-top: 28px;
    padding-bottom: 32px;
  }
}

@media (max-width: 768px) {
  .wb-studio-main-container {
    width: 100% !important;
    padding-top: 20px !important;
    padding-bottom: 24px !important;
    padding-left: 8px !important;
    padding-right: 8px !important;
  }
}

.wb-app-wrapper {
  position: relative;
  width: 100%;
  max-width: 100%;
  margin: 0 auto 32px;
  border-radius: var(--wb-radius-xl, 18px);
  background: var(--wb-shell-bg, #ffffff);
  border: 1px solid var(--wb-app-border, rgba(15, 23, 42, 0.18));
  box-shadow: 
    0 1px 3px rgba(15, 23, 42, 0.04),
    0 8px 30px -4px rgba(15, 23, 42, 0.08);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

[data-theme="dark"] .wb-app-wrapper {
  background: var(--wb-shell-bg, #0f172a);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 
    0 1px 3px rgba(0, 0, 0, 0.4),
    0 12px 36px -4px rgba(0, 0, 0, 0.65);
}

@media (max-width: 768px) {
  .wb-app-wrapper {
    margin: 0 auto 16px;
    border-radius: 12px;
  }
}

/* TEACHING STUDIO COMMAND BAR HEADER */
.wb-studio-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  min-height: 52px;
  padding: 0 14px;
  background: var(--wb-shell-bg, #ffffff);
  border-bottom: 1px solid var(--wb-toolbar-border, #e2e8f0);
  gap: 10px;
  z-index: 30;
  box-sizing: border-box;
}

[data-theme="dark"] .wb-studio-header {
  background: var(--wb-shell-bg, #0f172a);
  border-color: var(--wb-toolbar-border, #1e293b);
}

.wb-studio-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.wb-brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: #0f172a;
  color: #f8fafc;
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  font-size: 0.76rem;
  font-weight: 800;
  padding: 5px 10px;
  border-radius: 8px;
  letter-spacing: 0.3px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
  user-select: none;
  flex-shrink: 0;
}

[data-theme="dark"] .wb-brand-badge {
  background: #1e293b;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.wb-brand-badge .wb-badge-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.3);
  flex-shrink: 0;
}

.wb-brand-badge .wb-badge-version {
  background: #2563eb;
  color: #ffffff;
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.62rem;
  font-weight: 800;
  margin-left: 2px;
}

[data-theme="dark"] .wb-brand-badge .wb-badge-version {
  background: #1d4ed8;
}

/* ============================================================
   CUSTOM SUBJECT WORKSPACE SWITCHER & DROPDOWN MENU
   ============================================================ */
.wb-subject-switcher-wrapper {
  position: relative;
  flex-shrink: 0;
}

.wb-subject-switcher-trigger {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 8px 3px 5px;
  border-radius: 8px;
  border: 1px solid var(--wb-toolbar-border, #cbd5e1);
  background: var(--wb-workspace-bg, #f1f5f9);
  color: var(--wb-text-dark, #0f172a);
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  cursor: pointer;
  outline: none;
  transition: var(--wb-transition);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
  user-select: none;
}

[data-theme="dark"] .wb-subject-switcher-trigger {
  background: #1e293b;
  border-color: #334155;
  color: #f8fafc;
}

.wb-subject-switcher-trigger:hover {
  border-color: #2563eb;
  background: var(--wb-shell-bg, #ffffff);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.12);
}

.wb-subject-switcher-trigger:focus-visible {
  border-color: #2563eb;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.25);
}

.wb-subject-current-icon {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
  flex-shrink: 0;
}

.wb-subject-current-text {
  display: flex;
  flex-direction: column;
  text-align: left;
  line-height: 1.15;
}

.wb-subject-current-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
  letter-spacing: -0.1px;
}

[data-theme="dark"] .wb-subject-current-label {
  color: #f8fafc;
}

.wb-subject-current-sub {
  font-size: 0.62rem;
  font-weight: 500;
  color: var(--wb-text-muted, #64748b);
}

.wb-subject-chevron {
  font-size: 0.62rem;
  color: var(--wb-text-muted, #64748b);
  margin-left: 2px;
  transition: transform 0.16s ease;
}

.wb-subject-switcher-wrapper.open .wb-subject-chevron {
  transform: rotate(180deg);
}

.wb-subject-dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 70;
  width: 280px;
  background: var(--wb-shell-bg, #ffffff);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 12px;
  padding: 5px;
  box-shadow: 0 14px 34px -4px rgba(15, 23, 42, 0.16), 0 4px 12px rgba(15, 23, 42, 0.06);
  display: flex;
  flex-direction: column;
  gap: 2px;
  box-sizing: border-box;
  animation: wbMenuFadeIn 0.15s ease-out;
}

[data-theme="dark"] .wb-subject-dropdown-menu {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 16px 40px -4px rgba(0, 0, 0, 0.7), 0 6px 18px rgba(0, 0, 0, 0.5);
}

@keyframes wbMenuFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.wb-subj-dropdown-header {
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  color: var(--wb-text-muted, #64748b);
  padding: 6px 8px 3px;
  user-select: none;
}

.wb-subject-option {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 9px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--wb-text-dark, #0f172a);
  cursor: pointer;
  text-align: left;
  transition: var(--wb-transition);
  width: 100%;
  box-sizing: border-box;
}

[data-theme="dark"] .wb-subject-option {
  color: #f8fafc;
}

.wb-subject-option:hover {
  background: var(--wb-btn-hover, #f1f5f9);
  transform: translateX(2px);
}

[data-theme="dark"] .wb-subject-option:hover {
  background: #334155;
}

.wb-subject-option.active {
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.25);
}

[data-theme="dark"] .wb-subject-option.active {
  background: rgba(37, 99, 235, 0.2);
  border-color: rgba(96, 165, 250, 0.35);
}

.wb-subj-icon {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.wb-subj-details {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.wb-subj-name {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
}

[data-theme="dark"] .wb-subj-name {
  color: #f8fafc;
}

.wb-subj-desc {
  font-size: 0.66rem;
  color: var(--wb-text-muted, #64748b);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.wb-subj-check {
  font-size: 0.72rem;
  color: #2563eb;
  display: none;
  flex-shrink: 0;
}

.wb-subject-option.active .wb-subj-check {
  display: block;
}

/* FALLBACK NATIVE SUBJECT SELECT */
.wb-subject-select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding: 4px 26px 4px 10px;
  border-radius: 7px;
  border: 1px solid var(--wb-toolbar-border, #cbd5e1);
  background-color: var(--wb-btn-hover, #f8fafc);
  color: var(--wb-text-dark, #0f172a);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  outline: none;
  transition: var(--wb-transition);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.wb-subject-select:hover {
  border-color: #2563eb;
  background-color: #ffffff;
}

.wb-subject-select:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

/* STUDIO STATUS & DOCUMENT INFO */
.wb-studio-center {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: center;
}

.wb-doc-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--wb-workspace-bg, #f1f5f9);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 999px;
  padding: 3px 10px;
  transition: var(--wb-transition);
}

[data-theme="dark"] .wb-doc-pill {
  background: #1e293b;
  border-color: #334155;
}

.wb-doc-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

[data-theme="dark"] .wb-doc-title {
  color: #f8fafc;
}

.wb-header-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.08);
  color: #059669;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.3px;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

[data-theme="dark"] .wb-header-badge {
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
  border-color: rgba(52, 211, 153, 0.35);
}

/* STUDIO ACTION DOCK (RIGHT HIERARCHY) */
.wb-studio-actions {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}

.wb-action-cluster {
  display: flex;
  align-items: center;
  gap: 3px;
  background: var(--wb-workspace-bg, #f1f5f9);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 8px;
  padding: 2px 4px;
}

[data-theme="dark"] .wb-action-cluster {
  background: rgba(30, 41, 59, 0.65);
  border-color: #334155;
}

.wb-btn-import {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--wb-text-dark, #0f172a);
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--wb-transition);
  user-select: none;
}

[data-theme="dark"] .wb-btn-import {
  color: #f8fafc;
}

.wb-btn-import:hover {
  background: var(--wb-shell-bg, #ffffff);
  border-color: var(--wb-toolbar-border, #cbd5e1);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

[data-theme="dark"] .wb-btn-import:hover {
  background: #334155;
  border-color: #475569;
}

/* RECORDING CLUSTER */
.wb-record-cluster {
  gap: 4px;
}

.wb-btn-record {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--wb-text-dark, #0f172a);
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--wb-transition);
}

[data-theme="dark"] .wb-btn-record {
  color: #f8fafc;
}

.wb-record-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ef4444;
  flex-shrink: 0;
  transition: var(--wb-transition);
}

.wb-btn-record:hover {
  background: var(--wb-shell-bg, #ffffff);
  border-color: var(--wb-toolbar-border, #cbd5e1);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

[data-theme="dark"] .wb-btn-record:hover {
  background: #334155;
  border-color: #475569;
}

.wb-btn-record.recording {
  background: rgba(239, 68, 68, 0.12) !important;
  color: #dc2626 !important;
  border-color: rgba(239, 68, 68, 0.35) !important;
}

[data-theme="dark"] .wb-btn-record.recording {
  background: rgba(239, 68, 68, 0.25) !important;
  color: #f87171 !important;
  border-color: rgba(239, 68, 68, 0.5) !important;
}

.wb-btn-record.recording .wb-record-dot {
  background: #dc2626;
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.25);
  animation: wbPulseRec 1.5s infinite;
}

@keyframes wbPulseRec {
  0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
  100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.wb-recording-indicator {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(239, 68, 68, 0.12);
  color: #dc2626;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.3px;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

[data-theme="dark"] .wb-recording-indicator {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.4);
}

.wb-rec-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #dc2626;
  animation: wbPulseRec 1.5s infinite;
}

.wb-mic-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 6px;
  border-radius: 5px;
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--wb-text-muted, #64748b);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--wb-transition);
  user-select: none;
}

.wb-mic-toggle:hover {
  color: var(--wb-text-dark, #0f172a);
  background: var(--wb-shell-bg, #ffffff);
}

[data-theme="dark"] .wb-mic-toggle:hover {
  color: #f8fafc;
  background: #334155;
}

.wb-mic-toggle input[type="checkbox"] {
  display: none;
}

.wb-mic-toggle input:checked ~ i,
.wb-mic-toggle input:checked ~ .wb-mic-label {
  color: #2563eb;
}

[data-theme="dark"] .wb-mic-toggle input:checked ~ i,
[data-theme="dark"] .wb-mic-toggle input:checked ~ .wb-mic-label {
  color: #60a5fa;
}

/* UTILITY CLUSTER */
.wb-utility-cluster {
  display: flex;
  align-items: center;
  gap: 3px;
  background: var(--wb-workspace-bg, #f1f5f9);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 8px;
  padding: 2px 4px;
}

[data-theme="dark"] .wb-utility-cluster {
  background: rgba(30, 41, 59, 0.65);
  border-color: #334155;
}

.wb-btn-icon {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--wb-text-muted, #64748b);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.84rem;
  cursor: pointer;
  transition: var(--wb-transition);
}

.wb-btn-icon:hover {
  background: var(--wb-shell-bg, #ffffff);
  color: var(--wb-text-dark, #0f172a);
  border-color: var(--wb-toolbar-border, #cbd5e1);
  transform: translateY(-1px);
}

[data-theme="dark"] .wb-btn-icon:hover {
  background: #334155;
  color: #f8fafc;
  border-color: #475569;
}

.wb-btn-danger-ghost:hover {
  background: rgba(239, 68, 68, 0.1) !important;
  color: #ef4444 !important;
  border-color: rgba(239, 68, 68, 0.3) !important;
}

/* RESPONSIVE HEADER ADAPTATIONS */
@media (max-width: 1100px) {
  .wb-doc-name {
    max-width: 90px;
  }
}

@media (max-width: 960px) {
  .wb-doc-pill {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .wb-studio-header {
    padding: 0 8px;
    height: 48px;
    min-height: 48px;
    gap: 6px;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
  }
  .wb-studio-header::-webkit-scrollbar {
    display: none;
  }
  .wb-brand-badge .wb-badge-version {
    display: none;
  }
  .wb-subject-current-sub {
    display: none;
  }
  #wbRecordLabel {
    display: none;
  }
  .wb-mic-label {
    display: none;
  }
  .wb-context-bar {
    padding: 0 10px;
    gap: 8px;
  }
  .wb-lesson-flow-bar {
    padding: 0 10px;
    gap: 6px;
  }
}

@media (max-width: 600px) {
  #wbPresentBtn,
  .wb-btn-present {
    height: 36px;
    min-height: 36px;
    padding: 0 12px;
    font-size: 0.8rem;
    border-radius: 8px;
    gap: 6px;
  }
}

@media (max-width: 420px) {
  #wbPresentBtn,
  .wb-btn-present {
    height: 34px;
    min-height: 34px;
    padding: 0 9px;
    font-size: 0.76rem;
    gap: 5px;
  }
  #wbPresentBtn i,
  .wb-btn-present i {
    font-size: 0.82rem;
  }
  .wb-brand-badge span {
    display: none;
  }
}

/* CONTEXTUAL TOOL PARAMETERS BAR */
.wb-context-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 42px;
  min-height: 42px;
  padding: 0 16px;
  background: var(--wb-workspace-bg, #f1f5f9);
  border-bottom: 1px solid var(--wb-toolbar-border, #e2e8f0);
  flex-wrap: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
  z-index: 20;
  box-sizing: border-box;
}

.wb-context-bar::-webkit-scrollbar {
  display: none;
}

[data-theme="dark"] .wb-context-bar {
  background: #0b0f19;
  border-color: #1e293b;
}

.wb-param-group {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
  flex-shrink: 0;
}

.wb-param-label {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--wb-text-muted, #64748b);
  user-select: none;
  flex-shrink: 0;
}

.wb-param-divider {
  width: 1px;
  height: 18px;
  background: var(--wb-toolbar-border, #e2e8f0);
  flex-shrink: 0;
}

[data-theme="dark"] .wb-param-divider {
  background: #1e293b;
}

/* COLOR SWATCHES */
.wb-color-swatches {
  display: flex;
  align-items: center;
  gap: 5px;
}

.wb-swatch {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease;
}

.wb-swatch:hover {
  transform: scale(1.15);
}

.wb-swatch.active {
  transform: scale(1.18);
  border-color: #ffffff;
  box-shadow: 0 0 0 2px var(--wb-workspace-bg, #f1f5f9), 0 0 0 4px #2563eb;
}

[data-theme="dark"] .wb-swatch.active {
  box-shadow: 0 0 0 2px #0b0f19, 0 0 0 4px #3b82f6;
}

/* STROKE SLIDER & PREVIEW DOT */
.wb-stroke-preview-container {
  display: flex;
  align-items: center;
  gap: 7px;
}

#wbStrokePreviewDot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #2563eb;
  transition: width 0.1s ease, height 0.1s ease, background-color 0.14s ease;
  flex-shrink: 0;
}

#wbStrokeWidth {
  -webkit-appearance: none;
  appearance: none;
  width: 70px;
  height: 4px;
  background: var(--wb-toolbar-border, #cbd5e1);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

[data-theme="dark"] #wbStrokeWidth {
  background: #334155;
}

#wbStrokeWidth::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #2563eb;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(37, 99, 235, 0.4);
}

/* Context Bar Selects & Toggle Controls */
.wb-context-select {
  background: var(--wb-card-bg, #ffffff);
  color: var(--wb-text-dark, #0f172a);
  border: 1px solid var(--wb-toolbar-border, #cbd5e1);
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.wb-context-select:hover {
  border-color: #2563eb;
}

.wb-context-select:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.wb-context-toggle-btn {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--wb-card-bg, #ffffff);
  border: 1px solid var(--wb-toolbar-border, #cbd5e1);
  color: var(--wb-text-secondary, #475569);
  font-size: 0.78rem;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--wb-transition);
  user-select: none;
}

[data-theme="dark"] .wb-context-toggle-btn {
  background: #131b2c;
  border-color: #334155;
  color: #cbd5e1;
}

.wb-context-toggle-btn:hover {
  background: var(--wb-btn-hover);
  border-color: #2563eb;
  color: #2563eb;
}

.wb-context-toggle-btn.active {
  background: #2563eb !important;
  border-color: #1d4ed8 !important;
  color: #ffffff !important;
  box-shadow: 0 1px 4px rgba(37, 99, 235, 0.35);
}

#wbPresStylusBtn.active {
  background: #2563eb !important;
  color: #ffffff !important;
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.6) !important;
}

#wbPdfChalkboardBtn.active,
#wbPresPdfChalkboardBtn.active {
  background: #10b981 !important;
  color: #ffffff !important;
}

/* ============================================================
   8-STAGE PEDAGOGICAL LESSON FLOW PROGRESSION STEPPER
   ============================================================ */
.wb-lesson-flow-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 40px;
  min-height: 40px;
  padding: 0 16px;
  background: var(--wb-shell-bg, #ffffff);
  border-bottom: 1px solid var(--wb-toolbar-border, #e2e8f0);
  flex-wrap: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
  z-index: 21;
  box-sizing: border-box;
}

.wb-lesson-flow-bar::-webkit-scrollbar {
  display: none;
}

[data-theme="dark"] .wb-lesson-flow-bar {
  background: var(--wb-shell-bg, #0f172a);
  border-color: var(--wb-toolbar-border, #1e293b);
}

.wb-flow-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--wb-text-muted, #64748b);
  user-select: none;
  flex-shrink: 0;
}

.wb-flow-steps {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
  flex: 1;
  flex-shrink: 0;
}

.wb-flow-step {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 20px;
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  flex-shrink: 0;
  font-size: 0.74rem;
  font-weight: 600;
  border: 1px solid var(--wb-toolbar-border, #cbd5e1);
  background: var(--wb-workspace-bg, #f1f5f9);
  color: var(--wb-text-secondary, #475569);
  cursor: pointer;
  transition: var(--wb-transition);
  user-select: none;
}

[data-theme="dark"] .wb-flow-step {
  background: #1e293b;
  border-color: #334155;
  color: #94a3b8;
}

.wb-flow-step:hover {
  border-color: #94a3b8;
  color: #0f172a;
  background: var(--wb-shell-bg, #ffffff);
}

[data-theme="dark"] .wb-flow-step:hover {
  background: #334155;
  color: #f8fafc;
  border-color: #64748b;
}

.wb-flow-step.active {
  background: #0f172a !important;
  color: #ffffff !important;
  border-color: #0f172a !important;
  font-weight: 700 !important;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.18) !important;
  transform: translateY(-1px);
}

[data-theme="dark"] .wb-flow-step.active {
  background: #2563eb !important;
  color: #ffffff !important;
  border-color: #2563eb !important;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3) !important;
}

.wb-flow-step.completed {
  background: rgba(16, 185, 129, 0.08) !important;
  color: #059669 !important;
  border-color: rgba(16, 185, 129, 0.28) !important;
  font-weight: 600 !important;
}

[data-theme="dark"] .wb-flow-step.completed {
  background: rgba(16, 185, 129, 0.18) !important;
  color: #34d399 !important;
  border-color: rgba(52, 211, 153, 0.4) !important;
}

.wb-step-num {
  font-size: 0.65rem;
  font-weight: 800;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.06);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 2px;
}

.wb-flow-step.active .wb-step-num {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.wb-flow-arrow {
  color: var(--wb-border-light, #cbd5e1);
  font-size: 0.72rem;
  user-select: none;
  margin: 0 1px;
}

.wb-flow-nav {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-left: auto;
  flex-shrink: 0;
}

.wb-flow-btn {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  border: 1px solid var(--wb-toolbar-border, #cbd5e1);
  background: var(--wb-workspace-bg, #f1f5f9);
  color: var(--wb-text-dark, #0f172a);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  transition: var(--wb-transition);
}

[data-theme="dark"] .wb-flow-btn {
  background: #1e293b;
  border-color: #334155;
  color: #f8fafc;
}

.wb-flow-btn:hover {
  border-color: #2563eb;
  color: #2563eb;
  background: var(--wb-shell-bg, #ffffff);
}

/* ============================================================
   MAIN TEACHING WORKSPACE GRID (DESKTOP THREE-COLUMN STRUCTURE)
   LEFT CREATIVE DOCK (64px) + CENTER CANVAS (1fr) + RIGHT LESSON RAIL (220px)
   ============================================================ */
.wb-workspace-grid {
  display: grid;
  grid-template-columns: 64px 1fr 220px;
  height: clamp(600px, calc(100vh - 165px), 940px);
  min-height: 560px;
  max-height: 960px;
  background: var(--wb-workspace-bg, #f8fafc);
  position: relative;
  overflow: hidden;
  transition: grid-template-columns 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] .wb-workspace-grid {
  background: #090d16;
}

.wb-workspace-grid.toolbar-collapsed {
  grid-template-columns: 28px 1fr 220px;
}

/* Responsive Breakpoints */
@media (max-width: 1240px) {
  .wb-workspace-grid {
    grid-template-columns: 64px 1fr 200px;
  }
}

@media (max-width: 1100px) {
  .wb-workspace-grid {
    grid-template-columns: 64px 1fr;
  }
  .wb-workspace-grid.toolbar-collapsed {
    grid-template-columns: 28px 1fr;
  }
  .vff-ad-rail {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .wb-workspace-grid {
    display: flex;
    flex-direction: column-reverse;
    height: calc(100dvh - 200px);
    min-height: 420px;
    max-height: none;
  }
}

/* Laptop Viewport Height Optimization (1366x768, 1440x900, 1536x864) */
@media (max-height: 820px) {
  .wb-workspace-grid {
    height: calc(100vh - 150px);
    min-height: 480px;
  }
  .wb-studio-header {
    padding: 6px 12px;
    gap: 8px;
  }
  .wb-context-bar {
    padding: 5px 12px;
    gap: 10px;
  }
  .wb-lesson-flow-bar {
    padding: 4px 12px;
  }
}

@media (max-height: 720px) {
  .wb-workspace-grid {
    height: calc(100vh - 135px);
    min-height: 420px;
  }
}

/* COLLAPSIBLE LEFT CREATIVE TOOLBAR DOCK */
.wb-toolbar {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 4px;
  gap: 3px;
  background: var(--wb-toolbar-bg, #ffffff);
  border-right: 1px solid var(--wb-toolbar-border, #e2e8f0);
  box-shadow: 1px 0 4px rgba(15, 23, 42, 0.02);
  z-index: 15;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  width: 100%;
  box-sizing: border-box;
}

[data-theme="dark"] .wb-toolbar {
  background: #111827;
  border-color: #1e293b;
}

.wb-toolbar::-webkit-scrollbar {
  display: none;
}

.wb-tool-group-label {
  font-size: 0.56rem;
  font-weight: 800;
  color: var(--wb-text-muted, #94a3b8);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin: 7px 0 2px;
  user-select: none;
  text-align: center;
}

/* Collapsed Toolbar State */
.wb-toolbar.collapsed {
  padding: 8px 2px !important;
  background: rgba(15, 23, 42, 0.03);
}

[data-theme="dark"] .wb-toolbar.collapsed {
  background: rgba(255, 255, 255, 0.03);
}

.wb-toolbar.collapsed .wb-tool-btn,
.wb-toolbar.collapsed .wb-tool-divider,
.wb-toolbar.collapsed .wb-tool-group-label,
.wb-toolbar.collapsed .wb-drawer-trigger-btn {
  display: none !important;
}

.wb-toolbar-toggle {
  width: 32px;
  height: 22px;
  border-radius: 6px;
  border: 1px solid var(--wb-toolbar-border, #cbd5e1);
  background: var(--wb-btn-hover, #f8fafc);
  color: var(--wb-text-dark, #0f172a);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  margin-bottom: 2px;
  transition: all 0.15s ease;
}

[data-theme="dark"] .wb-toolbar-toggle {
  background: #1e293b;
  border-color: #334155;
  color: #f8fafc;
}

.wb-toolbar.collapsed .wb-toolbar-toggle {
  width: 22px;
  height: 32px;
  border-radius: 4px;
  margin-bottom: 0;
}

.wb-toolbar-toggle:hover {
  background: #2563eb;
  color: #ffffff;
  border-color: #2563eb;
}

@media (max-width: 768px) {
  .wb-toolbar {
    flex-direction: row;
    width: 100% !important;
    height: auto;
    min-height: 48px;
    border-right: none;
    border-top: 1px solid var(--wb-toolbar-border);
    justify-content: flex-start;
    overflow-x: auto;
    padding: 4px 8px;
    gap: 4px;
  }

  .wb-tool-group-label {
    display: none !important;
  }

  .wb-toolbar-toggle {
    display: none !important;
  }
}

/* PRIMARY TOOL BUTTONS (40×40px, DISTINCT ACTIVE ACCENTS) */
.wb-tool-btn {
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  border-radius: 9px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--wb-text-secondary, #475569);
  font-size: 0.96rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  box-sizing: border-box;
}

[data-theme="dark"] .wb-tool-btn {
  color: #94a3b8;
}

.wb-tool-btn:hover {
  background: var(--wb-btn-hover, #f1f5f9);
  color: #0f172a;
  border-color: #cbd5e1;
  transform: translateY(-1px);
}

[data-theme="dark"] .wb-tool-btn:hover {
  background: #1e293b;
  color: #f8fafc;
  border-color: #475569;
}

.wb-tool-btn:active {
  transform: translateY(0);
}

.wb-tool-btn.active {
  background: #0f172a !important;
  color: #ffffff !important;
  border-color: #0f172a !important;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.2) !important;
}

[data-theme="dark"] .wb-tool-btn.active {
  background: #2563eb !important;
  color: #ffffff !important;
  border-color: #2563eb !important;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4) !important;
}

/* Tool Active Indicator Pill Notch */
.wb-tool-btn.active::before {
  content: '';
  position: absolute;
  left: -3px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  border-radius: 0 2px 2px 0;
  background: currentColor;
}

@media (max-width: 768px) {
  .wb-tool-btn.active::before {
    left: 50%;
    top: -3px;
    transform: translateX(-50%);
    width: 18px;
    height: 3px;
    border-radius: 0 0 2px 2px;
  }
}

.wb-tool-btn:disabled {
  opacity: 0.32;
  cursor: not-allowed;
  pointer-events: none;
}

.wb-tool-divider {
  width: 32px;
  height: 1px;
  background: var(--wb-toolbar-border, #e2e8f0);
  margin: 5px 0;
}

[data-theme="dark"] .wb-tool-divider {
  background: #334155;
}

@media (max-width: 768px) {
  .wb-tool-divider {
    width: 1px;
    height: 26px;
    margin: 0 3px;
  }
}

/* SUBJECT TOOLS DRAWER FLYOUT */
.wb-subject-drawer {
  display: none;
  position: absolute;
  top: 10px;
  left: 74px;
  z-index: 55;
  background: var(--wb-toolbar-bg);
  border: 1px solid var(--wb-toolbar-border);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.16);
  border-radius: 12px;
  padding: 12px;
  width: 270px;
  box-sizing: border-box;
  animation: drawerFadeIn 0.16s ease-out;
}

@keyframes drawerFadeIn {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}

.wb-drawer-title {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--wb-text-dark);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--wb-toolbar-border);
  padding-bottom: 7px;
}

.wb-drawer-grid {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.wb-drawer-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 11px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: var(--wb-btn-hover);
  color: var(--wb-text-dark);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.14s ease;
}

.wb-drawer-btn:hover {
  background: #2563eb;
  color: #ffffff;
  transform: translateX(2px);
}

/* ============================================================
   CENTER TEACHING CANVAS VIEWPORT & TEACHER ONBOARDING
   ============================================================ */
.wb-canvas-container {
  position: relative;
  width: calc(100% - 24px);
  height: calc(100% - 24px);
  margin: 12px;
  border-radius: 14px;
  background-color: var(--wb-canvas-bg, #ffffff);
  border: 2px solid var(--wb-canvas-border, #334155);
  overflow: hidden;
  touch-action: none;
  box-shadow: 
    0 1px 3px rgba(15, 23, 42, 0.08),
    0 8px 24px -4px rgba(15, 23, 42, 0.12);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

[data-theme="dark"] .wb-canvas-container {
  border: 2px solid #475569;
  box-shadow: 
    0 1px 3px rgba(0, 0, 0, 0.4),
    0 8px 24px -4px rgba(0, 0, 0, 0.5);
}

@media (max-width: 768px) {
  .wb-canvas-container {
    width: calc(100% - 12px);
    height: calc(100% - 12px);
    margin: 6px;
    border-radius: 10px;
  }
}

@media (max-width: 480px) {
  .wb-canvas-container {
    width: calc(100% - 4px);
    height: calc(100% - 4px);
    margin: 2px;
    border-radius: 8px;
  }
}

/* ============================================================
   CLASSROOM SURFACES ARCHITECTURE (PHASE 2.5)
   ============================================================ */
.wb-canvas-container[data-surface="white"] {
  --wb-canvas-bg: #ffffff;
  background-color: #ffffff !important;
}

.wb-canvas-container[data-surface="chalkboard"] {
  --wb-canvas-bg: #133827;
  background-color: #133827 !important;
}

.wb-canvas-container[data-surface="blackboard"] {
  --wb-canvas-bg: #18181b;
  background-color: #18181b !important;
}

.wb-canvas-container[data-surface="cream"] {
  --wb-canvas-bg: #fdfbf7;
  background-color: #fdfbf7 !important;
}

/* PDF UNDERLAY LAYER (PHASE 2.5)
   Positioned strictly beneath drawing canvas, decoupled from ink */
.wb-pdf-canvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  pointer-events: none;
  z-index: 5;
  transform-origin: 0 0;
  image-rendering: auto;
  transition: filter 0.18s ease;
}

/* CHALKBOARD PDF MODE (1-click color inversion for dark chalkboard / slate contrast) */
.wb-pdf-canvas.chalkboard-mode {
  filter: invert(0.92) hue-rotate(180deg) contrast(1.15) brightness(0.95);
}

/* EDUCATIONAL IMAGE & DIAGRAM UNDERLAY LAYER (ISOLATED FROM INK ERASER)
   Positioned strictly beneath the ink drawing canvas and above the PDF layer */
.wb-image-canvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  pointer-events: none;
  z-index: 7;
  transform-origin: 0 0;
  image-rendering: auto;
}

#whiteboardCanvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  cursor: crosshair;
  touch-action: none;
  background: transparent;
  image-rendering: auto;
  z-index: 10;
}

#whiteboardCanvas.pan-mode {
  cursor: grab;
}

#whiteboardCanvas.pan-mode:active {
  cursor: grabbing;
}

/* POLISHED TEACHER-FOCUSED ONBOARDING EMPTY STATE */
.wb-empty-state {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 20;
  background: var(--wb-shell-bg, #ffffff);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 16px;
  box-shadow: 
    0 1px 3px 0 rgba(15, 23, 42, 0.04),
    0 20px 40px -8px rgba(15, 23, 42, 0.16),
    0 8px 16px -4px rgba(15, 23, 42, 0.08);
  padding: 22px 26px;
  max-width: 520px;
  width: 90%;
  text-align: center;
  user-select: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  box-sizing: border-box;
}

[data-theme="dark"] .wb-empty-state {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 24px 50px -8px rgba(0, 0, 0, 0.7);
}

.wb-empty-close-btn {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  background: var(--wb-workspace-bg, #f8fafc);
  color: var(--wb-text-muted, #64748b);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  transition: all 0.14s ease;
}

.wb-empty-close-btn:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
}

.wb-empty-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #f1f5f9;
  color: #0f172a;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 8px;
  border: 1px solid #e2e8f0;
}

[data-theme="dark"] .wb-empty-badge {
  background: #1e293b;
  color: #94a3b8;
  border-color: #334155;
}

.wb-empty-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--wb-text-dark, #0f172a);
  letter-spacing: -0.2px;
  margin-bottom: 4px;
}

[data-theme="dark"] .wb-empty-title {
  color: #f8fafc;
}

.wb-empty-sub {
  font-size: 0.84rem;
  color: var(--wb-text-muted, #64748b);
  margin-bottom: 16px;
  line-height: 1.38;
}

.wb-empty-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 16px;
}

@media (max-width: 520px) {
  .wb-empty-grid {
    grid-template-columns: 1fr;
  }
}

.wb-empty-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--wb-workspace-bg, #f8fafc);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  cursor: pointer;
  text-align: left;
  transition: all 0.16s ease;
  box-sizing: border-box;
}

[data-theme="dark"] .wb-empty-card {
  background: #0f172a;
  border-color: #334155;
}

.wb-empty-card:hover {
  border-color: #94a3b8;
  background: var(--wb-shell-bg, #ffffff);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.08);
  transform: translateY(-2px);
}

[data-theme="dark"] .wb-empty-card:hover {
  background: #1e293b;
  border-color: #64748b;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

.wb-empty-card-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  margin-bottom: 8px;
}

#wbEmptyUploadPdfBtn .wb-empty-card-icon {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

#wbEmptyUploadImgBtn .wb-empty-card-icon {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

#wbEmptyBlankBtn .wb-empty-card-icon {
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
}

#wbEmptyTextBtn .wb-empty-card-icon {
  background: rgba(139, 92, 246, 0.1);
  color: #8b5cf6;
}

.wb-empty-card-title {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
  margin-bottom: 2px;
}

[data-theme="dark"] .wb-empty-card-title {
  color: #f8fafc;
}

.wb-empty-card-desc {
  font-size: 0.72rem;
  color: var(--wb-text-muted, #64748b);
  line-height: 1.35;
}

.wb-empty-footer {
  font-size: 0.72rem;
  color: var(--wb-text-muted, #64748b);
  border-top: 1px solid var(--wb-toolbar-border, #e2e8f0);
  padding-top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

[data-theme="dark"] .wb-empty-footer {
  border-color: #334155;
}

.wb-empty-reopen-btn {
  position: absolute;
  top: 10px;
  right: 14px;
  z-index: 25;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--wb-shell-bg, #ffffff);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  color: var(--wb-text-dark, #0f172a);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
  transition: all 0.15s ease;
}

.wb-empty-reopen-btn:hover {
  border-color: #2563eb;
  color: #2563eb;
  transform: translateY(-1px);
}

/* ============================================================
   HIGH-CONTRAST CRISP GRID & SUBJECT BACKGROUND PATTERNS
   ============================================================ */
.grid-dots {
  background-image: radial-gradient(#94a3b8 1.5px, transparent 1.5px);
  background-size: 24px 24px;
}

.grid-math {
  background-image: linear-gradient(to right, #cbd5e1 1px, transparent 1px),
                    linear-gradient(to bottom, #cbd5e1 1px, transparent 1px);
  background-size: 24px 24px;
}

.grid-graph {
  background-image: linear-gradient(to right, #e2e8f0 1px, transparent 1px),
                    linear-gradient(to bottom, #e2e8f0 1px, transparent 1px);
  background-size: 14px 14px;
}

/* Coordinate Plane with Bold Blue X & Y Axes and Centered Grid */
.grid-coord {
  background-image:
    linear-gradient(to right, #e2e8f0 1px, transparent 1px),
    linear-gradient(to bottom, #e2e8f0 1px, transparent 1px),
    linear-gradient(to right, transparent calc(50% - 1.5px), #2563eb calc(50% - 1.5px), #2563eb calc(50% + 1.5px), transparent calc(50% + 1.5px)),
    linear-gradient(to bottom, transparent calc(50% - 1.5px), #2563eb calc(50% - 1.5px), #2563eb calc(50% + 1.5px), transparent calc(50% + 1.5px));
  background-size: 24px 24px, 24px 24px, 100% 100%, 100% 100%;
  background-position: center center;
}

/* Number Line with Math Tick Marks & Numbers -10 to +10 */
.grid-numline {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1000' height='200' viewBox='0 0 1000 200'%3E%3Cdefs%3E%3Cmarker id='arrow' viewBox='0 0 10 10' refX='5' refY='5' markerWidth='6' markerHeight='6' orient='auto-start-reverse'%3E%3Cpath d='M 0 0 L 10 5 L 0 10 z' fill='%230f172a'/%3E%3C/marker%3E%3C/defs%3E%3Cline x1='40' y1='100' x2='960' y2='100' stroke='%230f172a' stroke-width='2.5' marker-start='url(%23arrow)' marker-end='url(%23arrow)'/%3E%3Cg stroke='%230f172a' stroke-width='2'%3E%3Cline x1='60' y1='85' x2='60' y2='115'/%3E%3Cline x1='105' y1='90' x2='105' y2='110'/%3E%3Cline x1='150' y1='85' x2='150' y2='115'/%3E%3Cline x1='195' y1='90' x2='195' y2='110'/%3E%3Cline x1='240' y1='85' x2='240' y2='115'/%3E%3Cline x1='285' y1='90' x2='285' y2='110'/%3E%3Cline x1='330' y1='85' x2='330' y2='115'/%3E%3Cline x1='375' y1='90' x2='375' y2='110'/%3E%3Cline x1='420' y1='85' x2='420' y2='115'/%3E%3Cline x1='465' y1='90' x2='465' y2='110'/%3E%3Cline x1='500' y1='80' x2='500' y2='120' stroke='%232563eb' stroke-width='3'/%3E%3Cline x1='545' y1='90' x2='545' y2='110'/%3E%3Cline x1='590' y1='85' x2='590' y2='115'/%3E%3Cline x1='635' y1='90' x2='635' y2='110'/%3E%3Cline x1='680' y1='85' x2='680' y2='115'/%3E%3Cline x1='725' y1='90' x2='725' y2='110'/%3E%3Cline x1='770' y1='85' x2='770' y2='115'/%3E%3Cline x1='815' y1='90' x2='815' y2='110'/%3E%3Cline x1='860' y1='85' x2='860' y2='115'/%3E%3Cline x1='905' y1='90' x2='905' y2='110'/%3E%3Cline x1='950' y1='85' x2='950' y2='115'/%3E%3C/g%3E%3Cg font-family='sans-serif' font-size='15' font-weight='700' fill='%230f172a' text-anchor='middle'%3E%3Ctext x='60' y='142'%3E-10%3C/text%3E%3Ctext x='150' y='142'%3E-8%3C/text%3E%3Ctext x='240' y='142'%3E-6%3C/text%3E%3Ctext x='330' y='142'%3E-4%3C/text%3E%3Ctext x='420' y='142'%3E-2%3C/text%3E%3Ctext x='500' y='145' fill='%232563eb' font-size='18'%3E0%3C/text%3E%3Ctext x='590' y='142'%3E2%3C/text%3E%3Ctext x='680' y='142'%3E4%3C/text%3E%3Ctext x='770' y='142'%3E6%3C/text%3E%3Ctext x='860' y='142'%3E8%3C/text%3E%3Ctext x='950' y='142'%3E10%3C/text%3E%3C/g%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 96% auto;
}

.grid-lines {
  background-image: linear-gradient(to bottom, transparent 31px, #cbd5e1 1px);
  background-size: 100% 32px;
}

/* Science Observation Table with Header Row and Columns */
.grid-table {
  background-image:
    linear-gradient(to right, transparent 30%, #94a3b8 30%, #94a3b8 calc(30% + 1.5px), transparent calc(30% + 1.5px), transparent 68%, #94a3b8 68%, #94a3b8 calc(68% + 1.5px), transparent calc(68% + 1.5px)),
    linear-gradient(to bottom, #1e293b 0, #1e293b 42px, #0f172a 42px, #0f172a 44px, transparent 44px),
    linear-gradient(to bottom, transparent 43px, #e2e8f0 43px, #e2e8f0 44px, transparent 44px);
  background-size: 100% 100%, 100% 100%, 100% 44px;
}

/* Speech Outline (3-Zone: Hook, Arguments, Conclusion) */
.grid-speech {
  background-image:
    linear-gradient(to bottom, transparent 32%, #cbd5e1 32%, #cbd5e1 calc(32% + 2px), transparent calc(32% + 2px), transparent 68%, #cbd5e1 68%, #cbd5e1 calc(68% + 2px), transparent calc(68% + 2px));
  background-size: 100% 100%;
}

.grid-blank {
  background-image: none;
}

/* ============================================================
   SURFACE-ADAPTIVE PATTERN MATRIX (PHASE 2.5)
   Translucent chalk-white and tailored contrast for dark classroom surfaces
   ============================================================ */
.wb-canvas-container[data-surface="chalkboard"].grid-dots,
.wb-canvas-container[data-surface="blackboard"].grid-dots {
  background-image: radial-gradient(rgba(255, 255, 255, 0.28) 1.5px, transparent 1.5px);
}

.wb-canvas-container[data-surface="chalkboard"].grid-math,
.wb-canvas-container[data-surface="blackboard"].grid-math {
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.18) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
}

.wb-canvas-container[data-surface="chalkboard"].grid-graph,
.wb-canvas-container[data-surface="blackboard"].grid-graph {
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.12) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
}

.wb-canvas-container[data-surface="chalkboard"].grid-lines,
.wb-canvas-container[data-surface="blackboard"].grid-lines {
  background-image: linear-gradient(to bottom, transparent 31px, rgba(255, 255, 255, 0.22) 1px);
}

.wb-canvas-container[data-surface="chalkboard"].grid-coord,
.wb-canvas-container[data-surface="blackboard"].grid-coord {
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.16) 1px, transparent 1px),
    linear-gradient(to right, transparent calc(50% - 1.5px), #60a5fa calc(50% - 1.5px), #60a5fa calc(50% + 1.5px), transparent calc(50% + 1.5px)),
    linear-gradient(to bottom, transparent calc(50% - 1.5px), #60a5fa calc(50% - 1.5px), #60a5fa calc(50% + 1.5px), transparent calc(50% + 1.5px));
}

.wb-canvas-container[data-surface="cream"].grid-dots {
  background-image: radial-gradient(rgba(100, 116, 139, 0.35) 1.5px, transparent 1.5px);
}

.wb-canvas-container[data-surface="cream"].grid-math {
  background-image: linear-gradient(to right, rgba(148, 163, 184, 0.35) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(148, 163, 184, 0.35) 1px, transparent 1px);
}

.wb-canvas-container[data-surface="cream"].grid-graph {
  background-image: linear-gradient(to right, rgba(148, 163, 184, 0.25) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(148, 163, 184, 0.25) 1px, transparent 1px);
}

.wb-canvas-container[data-surface="cream"].grid-lines {
  background-image: linear-gradient(to bottom, transparent 31px, rgba(148, 163, 184, 0.4) 1px);
}

.wb-canvas-container[data-surface="cream"].grid-coord {
  background-image:
    linear-gradient(to right, rgba(148, 163, 184, 0.3) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 163, 184, 0.3) 1px, transparent 1px),
    linear-gradient(to right, transparent calc(50% - 1.5px), #2563eb calc(50% - 1.5px), #2563eb calc(50% + 1.5px), transparent calc(50% + 1.5px)),
    linear-gradient(to bottom, transparent calc(50% - 1.5px), #2563eb calc(50% - 1.5px), #2563eb calc(50% + 1.5px), transparent calc(50% + 1.5px));
}

/* Number Line with Chalk-White & Bright Blue Markings for Dark Surfaces */
.wb-canvas-container[data-surface="chalkboard"].grid-numline,
.wb-canvas-container[data-surface="blackboard"].grid-numline {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1000' height='200' viewBox='0 0 1000 200'%3E%3Cdefs%3E%3Cmarker id='arrow-dark' viewBox='0 0 10 10' refX='5' refY='5' markerWidth='6' markerHeight='6' orient='auto-start-reverse'%3E%3Cpath d='M 0 0 L 10 5 L 0 10 z' fill='%23f8fafc'/%3E%3C/marker%3E%3C/defs%3E%3Cline x1='40' y1='100' x2='960' y2='100' stroke='%23f8fafc' stroke-width='2.5' marker-start='url(%23arrow-dark)' marker-end='url(%23arrow-dark)'/%3E%3Cg stroke='%23e2e8f0' stroke-width='2'%3E%3Cline x1='60' y1='85' x2='60' y2='115'/%3E%3Cline x1='105' y1='90' x2='105' y2='110'/%3E%3Cline x1='150' y1='85' x2='150' y2='115'/%3E%3Cline x1='195' y1='90' x2='195' y2='110'/%3E%3Cline x1='240' y1='85' x2='240' y2='115'/%3E%3Cline x1='285' y1='90' x2='285' y2='110'/%3E%3Cline x1='330' y1='85' x2='330' y2='115'/%3E%3Cline x1='375' y1='90' x2='375' y2='110'/%3E%3Cline x1='420' y1='85' x2='420' y2='115'/%3E%3Cline x1='465' y1='90' x2='465' y2='110'/%3E%3Cline x1='500' y1='80' x2='500' y2='120' stroke='%2360a5fa' stroke-width='3'/%3E%3Cline x1='545' y1='90' x2='545' y2='110'/%3E%3Cline x1='590' y1='85' x2='590' y2='115'/%3E%3Cline x1='635' y1='90' x2='635' y2='110'/%3E%3Cline x1='680' y1='85' x2='680' y2='115'/%3E%3Cline x1='725' y1='90' x2='725' y2='110'/%3E%3Cline x1='770' y1='85' x2='770' y2='115'/%3E%3Cline x1='815' y1='90' x2='815' y2='110'/%3E%3Cline x1='860' y1='85' x2='860' y2='115'/%3E%3Cline x1='905' y1='90' x2='905' y2='110'/%3E%3Cline x1='950' y1='85' x2='950' y2='115'/%3E%3C/g%3E%3Cg font-family='sans-serif' font-size='15' font-weight='700' fill='%23f8fafc' text-anchor='middle'%3E%3Ctext x='60' y='142'%3E-10%3C/text%3E%3Ctext x='150' y='142'%3E-8%3C/text%3E%3Ctext x='240' y='142'%3E-6%3C/text%3E%3Ctext x='330' y='142'%3E-4%3C/text%3E%3Ctext x='420' y='142'%3E-2%3C/text%3E%3Ctext x='500' y='145' fill='%2360a5fa' font-size='18'%3E0%3C/text%3E%3Ctext x='590' y='142'%3E2%3C/text%3E%3Ctext x='680' y='142'%3E4%3C/text%3E%3Ctext x='770' y='142'%3E6%3C/text%3E%3Ctext x='860' y='142'%3E8%3C/text%3E%3Ctext x='950' y='142'%3E10%3C/text%3E%3C/g%3E%3C/svg%3E");
}

/* Observation Table with Chalk Markings for Dark Surfaces */
.wb-canvas-container[data-surface="chalkboard"].grid-table,
.wb-canvas-container[data-surface="blackboard"].grid-table {
  background-image:
    linear-gradient(to right, transparent 30%, rgba(255, 255, 255, 0.22) 30%, rgba(255, 255, 255, 0.22) calc(30% + 1.5px), transparent calc(30% + 1.5px), transparent 68%, rgba(255, 255, 255, 0.22) 68%, rgba(255, 255, 255, 0.22) calc(68% + 1.5px), transparent calc(68% + 1.5px)),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.08) 0, rgba(255, 255, 255, 0.08) 42px, rgba(255, 255, 255, 0.3) 42px, rgba(255, 255, 255, 0.3) 44px, transparent 44px),
    linear-gradient(to bottom, transparent 43px, rgba(255, 255, 255, 0.14) 43px, rgba(255, 255, 255, 0.14) 44px, transparent 44px);
  background-size: 100% 100%, 100% 100%, 100% 44px;
}

/* Speech Outline with Chalk Lines for Dark Surfaces */
.wb-canvas-container[data-surface="chalkboard"].grid-speech,
.wb-canvas-container[data-surface="blackboard"].grid-speech {
  background-image:
    linear-gradient(to bottom, transparent 32%, rgba(255, 255, 255, 0.25) 32%, rgba(255, 255, 255, 0.25) calc(32% + 2px), transparent calc(32% + 2px), transparent 68%, rgba(255, 255, 255, 0.25) 68%, rgba(255, 255, 255, 0.25) calc(68% + 2px), transparent calc(68% + 2px));
  background-size: 100% 100%;
}

/* DIRECT-ON-CANVAS INLINE TEXT (ZERO-CHROME, NATIVE CARET) */
#wbDirectText {
  position: absolute;
  display: none;
  background: transparent !important;
  border: 1.5px dashed rgba(37, 99, 235, 0.4) !important;
  outline: none !important;
  box-shadow: none !important;
  padding: 4px 6px !important;
  margin: 0 !important;
  resize: none;
  overflow: hidden;
  white-space: pre-wrap;
  word-break: break-word;
  min-width: 60px;
  min-height: 28px;
  line-height: 1.3;
  z-index: 45;
  font-family: 'Inter', -apple-system, sans-serif;
  font-weight: 600;
  border-radius: 4px;
}

/* FLOATING MULTI-PAGE PRESENTATION CONTROLS */
.wb-floating-pdf-nav {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 3px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--wb-border-light, #cbd5e1);
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.12), 0 1px 3px rgba(15, 23, 42, 0.04);
  padding: 4px 10px;
  border-radius: 999px;
  z-index: 30;
  user-select: none;
}

[data-theme="dark"] .wb-floating-pdf-nav {
  background: rgba(15, 23, 42, 0.92);
  border-color: #334155;
  box-shadow: 0 6px 24px -2px rgba(0, 0, 0, 0.5);
}

.wb-nav-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--wb-text-dark, #0f172a);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  transition: all 0.15s ease;
}

.wb-nav-btn:hover {
  background: var(--wb-btn-hover, #f1f5f9);
  color: #2563eb;
}

[data-theme="dark"] .wb-nav-btn {
  color: #f8fafc;
}

[data-theme="dark"] .wb-nav-btn:hover {
  background: #1e293b;
  color: #60a5fa;
}

.wb-nav-btn:disabled {
  opacity: 0.28;
  cursor: not-allowed;
  pointer-events: none;
}

.wb-nav-badge {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
  padding: 0 8px;
  min-width: 75px;
  text-align: center;
}

[data-theme="dark"] .wb-nav-badge {
  color: #f8fafc;
}

/* BOTTOM CANVAS FLOATING ZOOM CONTROLS */
.wb-float-controls {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: 3px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--wb-border-light, #cbd5e1);
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.1), 0 1px 3px rgba(15, 23, 42, 0.04);
  padding: 3px 6px;
  border-radius: 999px;
  z-index: 25;
}

[data-theme="dark"] .wb-float-controls {
  background: rgba(15, 23, 42, 0.92);
  border-color: #334155;
  box-shadow: 0 6px 24px -2px rgba(0, 0, 0, 0.5);
}

.wb-float-controls .wb-tool-btn {
  width: 26px !important;
  height: 26px !important;
  min-width: 26px !important;
  min-height: 26px !important;
  font-size: 0.72rem !important;
  border-radius: 50% !important;
  color: var(--wb-text-dark, #0f172a);
}

[data-theme="dark"] .wb-float-controls .wb-tool-btn {
  color: #f8fafc;
}

.wb-float-controls .wb-tool-btn:hover {
  background: var(--wb-btn-hover, #f1f5f9);
  color: #2563eb;
}

[data-theme="dark"] .wb-float-controls .wb-tool-btn:hover {
  background: #1e293b;
  color: #60a5fa;
}

#wbZoomVal {
  font-size: 0.74rem;
  font-weight: 700;
  min-width: 38px;
  text-align: center;
  color: var(--wb-text-dark, #0f172a);
  user-select: none;
}

[data-theme="dark"] #wbZoomVal {
  color: #f8fafc;
}

/* ACTION BUTTONS & PILLS */
.wb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 8px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.wb-btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff !important;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.2);
}

.wb-btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-1px);
}

/* PRIMARY TEACHING ACTION: CLASSROOM PRESENTATION MODE (#wbPresentBtn) */
#wbPresentBtn,
.wb-btn-present {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 10px;
  background: #2563eb;
  color: #ffffff !important;
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  border: 1px solid #1d4ed8;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.28), 0 1px 2px rgba(15, 23, 42, 0.08);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

#wbPresentBtn i,
.wb-btn-present i {
  font-size: 0.92rem;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
}

#wbPresentBtn span,
.wb-btn-present span {
  color: #ffffff !important;
  font-weight: 700;
}

#wbPresentBtn:hover,
.wb-btn-present:hover {
  background: #1d4ed8;
  border-color: #1e40af;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.38), 0 1px 3px rgba(15, 23, 42, 0.12);
  transform: translateY(-1px);
}

#wbPresentBtn:active,
.wb-btn-present:active {
  background: #1e40af;
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.25);
}

[data-theme="dark"] #wbPresentBtn,
[data-theme="dark"] .wb-btn-present {
  background: #2563eb;
  border-color: #3b82f6;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

[data-theme="dark"] #wbPresentBtn:hover,
[data-theme="dark"] .wb-btn-present:hover {
  background: #3b82f6;
  border-color: #60a5fa;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.55);
}

#wbExitPresentBtn,
.wb-btn-exit-present {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 40px;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 10px;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444 !important;
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  font-size: 0.82rem;
  font-weight: 700;
  border: 1px solid rgba(239, 68, 68, 0.3);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s ease;
  user-select: none;
}

#wbExitPresentBtn:hover,
.wb-btn-exit-present:hover {
  background: #ef4444;
  color: #ffffff !important;
  border-color: #ef4444;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

#wbExitPresentBtn i {
  font-size: 0.85rem;
}

.wb-btn-secondary {
  background: var(--wb-toolbar-bg);
  color: var(--wb-text-dark);
  border: 1px solid var(--wb-toolbar-border);
}

.wb-btn-secondary:hover {
  border-color: #2563eb;
  color: #2563eb;
  transform: translateY(-1px);
}

.wb-btn-danger {
  background: rgba(239, 68, 68, 0.08);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.wb-btn-danger:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
  transform: translateY(-1px);
}

/* ============================================================
   PRESENTATION / FULLSCREEN MODE (POWERPOINT-GRADE CLASSROOM)
   ============================================================ */
body.vff-presentation-active {
  overflow: hidden !important;
  background: #0f172a !important;
}

body.vff-presentation-active nav.navbar,
body.vff-presentation-active .toolhub-single-nav,
body.vff-presentation-active .toolhub-saas-hero,
body.vff-presentation-active #vffAdTop,
body.vff-presentation-active #vffAdBottom,
body.vff-presentation-active .toolhub-seo-section,
body.vff-presentation-active .wb-feedback-section,
body.vff-presentation-active .wb-final-cta-section,
body.vff-presentation-active footer,
body.vff-presentation-active .reading-progress-bar {
  display: none !important;
}

:fullscreen,
::backdrop {
  background-color: #0f172a !important;
}

.wb-app-wrapper:fullscreen,
.wb-app-wrapper.presentation-mode {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  width: 100% !important;
  height: 100vh !important;
  height: 100dvh !important;
  min-height: 100vh !important;
  min-height: 100dvh !important;
  max-width: 100vw !important;
  margin: 0 !important;
  border: none !important;
  border-radius: 0 !important;
  z-index: 999999 !important;
  background: #0f172a !important;
  display: flex !important;
  flex-direction: column !important;
  box-shadow: none !important;
}

/* Hide Normal Chrome in Presentation Mode */
.wb-app-wrapper.presentation-mode .wb-studio-header,
.wb-app-wrapper.presentation-mode .wb-context-bar,
.wb-app-wrapper.presentation-mode .wb-lesson-flow-bar,
.wb-app-wrapper.presentation-mode .wb-toolbar,
.wb-app-wrapper.presentation-mode .vff-ad-rail,
.wb-app-wrapper.presentation-mode #wbQuickActionsWrapper {
  display: none !important;
}

/* Dedicated Clean Presentation Header */
.wb-presentation-header {
  height: 42px;
  min-height: 42px;
  background: #0f172a;
  border-bottom: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 9999999;
  user-select: none;
  box-sizing: border-box;
}

.wb-app-wrapper.presentation-mode .wb-presentation-header {
  display: flex !important;
}

.wb-pres-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.wb-pres-brand {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #f8fafc;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.wb-pres-brand i {
  color: #38bdf8;
}

.wb-pres-divider {
  color: #334155;
  font-size: 0.8rem;
}

.wb-pres-material {
  font-size: 0.78rem;
  color: #94a3b8;
  font-weight: 600;
  max-width: 240px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 8px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.wb-pres-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.wb-pres-pdf-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 2px 6px;
  border-radius: 8px;
}

.wb-pres-page-badge {
  font-size: 0.76rem;
  font-weight: 700;
  color: #f8fafc;
  min-width: 65px;
  text-align: center;
}

.wb-pres-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.wb-pres-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 7px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  background: #1e293b;
  color: #f1f5f9;
  border: 1px solid #334155;
  transition: all 0.14s ease;
}

.wb-pres-btn:hover {
  background: #334155;
  color: #ffffff;
  border-color: #475569;
}

.wb-pres-btn.active {
  background: #2563eb;
  border-color: #3b82f6;
  color: #ffffff;
}

.wb-pres-btn-tools {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.35);
  color: #38bdf8;
}

.wb-pres-btn-tools:hover,
.wb-pres-btn-tools.active {
  background: #0284c7;
  color: #ffffff;
  border-color: #38bdf8;
}

.wb-pres-btn-assets {
  background: rgba(139, 92, 246, 0.15);
  border-color: rgba(139, 92, 246, 0.35);
  color: #a78bfa;
}

.wb-pres-btn-assets:hover,
.wb-pres-btn-assets.active {
  background: #7c3aed;
  color: #ffffff;
  border-color: #a78bfa;
}

.wb-pres-btn-exit {
  background: rgba(239, 68, 68, 0.14);
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.wb-pres-btn-exit:hover {
  background: #dc2626;
  color: #ffffff;
  border-color: #ef4444;
}

.wb-pres-icon-btn {
  padding: 3px 8px;
  min-width: 24px;
  justify-content: center;
}

.wb-pres-dropdown-wrap {
  position: relative;
}

.wb-pres-chevron {
  font-size: 0.62rem;
  margin-left: 2px;
  opacity: 0.8;
}

.wb-pres-popover {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: rgba(15, 23, 42, 0.97);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.65);
  border-radius: 10px;
  padding: 6px;
  min-width: 220px;
  z-index: 10000002;
  display: flex;
  flex-direction: column;
  gap: 2px;
  backdrop-filter: blur(14px);
  animation: wbPresPopoverFade 0.14s ease-out;
  box-sizing: border-box;
}

@keyframes wbPresPopoverFade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.wb-pres-popover-title {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: #64748b;
  padding: 5px 8px 3px;
  user-select: none;
}

.wb-pres-popover-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin: 3px 0;
}

.wb-pres-popover-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 6px 10px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: #cbd5e1;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.12s ease;
  width: 100%;
  box-sizing: border-box;
}

.wb-pres-popover-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  transform: translateX(2px);
}

.wb-pres-popover-item.active {
  background: rgba(37, 99, 235, 0.25);
  color: #60a5fa;
  font-weight: 700;
}

.wb-pres-popover-item.danger:hover {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
}

.wb-pres-popover-item i {
  width: 16px;
  text-align: center;
  font-size: 0.85rem;
}

/* Responsive presentation header label collapse */
@media (max-width: 1180px) {
  .wb-pres-material { max-width: 140px; }
  .wb-pres-btn { padding: 4px 8px; font-size: 0.75rem; gap: 5px; }
}

@media (max-width: 1040px) {
  .wb-pres-material, .wb-pres-divider { display: none; }
}

@media (max-width: 960px) {
  .wb-pres-btn-text, .wb-pres-chevron { display: none; }
  .wb-pres-btn { padding: 5px 8px; }
  .wb-pres-brand span { display: none; }
}

/* Presentation Canvas Viewport */
.wb-app-wrapper.presentation-mode .wb-workspace-grid {
  display: flex !important;
  flex: 1 1 auto !important;
  width: 100% !important;
  height: calc(100vh - 42px - 28px) !important;
  height: calc(100dvh - 42px - 28px) !important;
  min-height: calc(100vh - 70px) !important;
  min-height: calc(100dvh - 70px) !important;
  background: var(--wb-canvas-bg, #ffffff) !important;
  position: relative !important;
  overflow: hidden !important;
  grid-template-columns: none !important;
}

.wb-app-wrapper.presentation-mode .wb-canvas-container {
  flex: 1 1 auto !important;
  width: 100% !important;
  height: 100% !important;
  margin: 0 !important;
  border: none !important;
  border-radius: 0 !important;
  background-color: var(--wb-canvas-bg, #ffffff) !important;
  box-shadow: none !important;
}

/* Reserved Presentation Ad Strip at Bottom */
.wb-app-wrapper.presentation-mode #vffAdPresentation {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  height: 28px !important;
  min-height: 28px !important;
  width: 100% !important;
  background: #0b0f19 !important;
  border-top: 1px solid #1e293b !important;
  color: #64748b !important;
  font-size: 0.68rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.6px !important;
  text-transform: uppercase !important;
  user-select: none !important;
  z-index: 100 !important;
  position: static !important;
}

/* Floating Presentation Teaching Tools Panel */
.wb-pres-tools-btn {
  display: none;
  position: absolute;
  top: 14px;
  left: 16px;
  z-index: 60;
  align-items: center;
  gap: 6px;
  background: rgba(30, 41, 59, 0.94);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.4);
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 700;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: all 0.16s ease;
}

.wb-pres-tool-panel {
  display: none;
  position: absolute;
  top: 12px;
  right: 16px;
  z-index: 1000000;
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.6);
  padding: 12px;
  flex-direction: column;
  gap: 8px;
  backdrop-filter: blur(14px);
  animation: presPanelFadeIn 0.18s ease-out;
  width: 236px;
  box-sizing: border-box;
}

@keyframes presPanelFadeIn {
  from { opacity: 0; transform: scale(0.96) translateY(-6px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.wb-pres-tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 800;
  color: #f8fafc;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  padding-bottom: 6px;
}

.wb-pres-hide-btn {
  background: transparent;
  border: none;
  color: #94a3b8;
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 4px;
}

.wb-pres-hide-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.wb-pres-color-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 6px;
  background: rgba(30, 41, 59, 0.6);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.wb-pres-color-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  box-sizing: border-box;
}

.wb-pres-color-dot:hover {
  transform: scale(1.15);
}

.wb-pres-color-dot.active {
  transform: scale(1.2);
  box-shadow: 0 0 0 2px #ffffff, 0 2px 6px rgba(0, 0, 0, 0.4);
}

.wb-pres-tool-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.wb-pres-tool-grid .wb-tool-btn {
  color: #cbd5e1;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 8px;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid #334155;
  font-size: 0.95rem;
}

.wb-pres-tool-grid .wb-tool-btn:hover {
  background: #334155;
  color: #ffffff;
  border-color: #475569;
}

.wb-pres-tool-grid .wb-tool-btn.active {
  background: #2563eb;
  border-color: #3b82f6;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

.wb-pres-tool-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 8px;
  gap: 6px;
}

.wb-pres-tool-footer .wb-nav-btn {
  flex: 1;
  height: 30px;
  border-radius: 6px;
  background: #1e293b;
  border: 1px solid #334155;
  color: #f1f5f9;
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.14s ease;
}

.wb-pres-tool-footer .wb-nav-btn:hover {
  background: #334155;
  color: #ffffff;
}

/* Teaching Assets Floating Drawer in Presentation Mode */
.wb-app-wrapper.presentation-mode .wb-assets-drawer {
  position: fixed !important;
  top: 50px !important;
  left: 16px !important;
  bottom: 38px !important;
  max-height: calc(100vh - 96px) !important;
  z-index: 10000002 !important;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65) !important;
}

/* Subject Specific Drawer Floating Position in Presentation Mode */
.wb-app-wrapper.presentation-mode .wb-subject-drawer {
  position: fixed !important;
  top: 50px !important;
  left: 16px !important;
  z-index: 10000003 !important;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65) !important;
}

/* Presentation Mode Tool Panel Floating Position */
.wb-app-wrapper.presentation-mode .wb-pres-tool-panel {
  position: fixed !important;
  top: 48px !important;
  right: 16px !important;
  left: auto !important;
  z-index: 10000001 !important;
}

@media (max-width: 600px) {
  .wb-app-wrapper.presentation-mode .wb-pres-tool-panel {
    right: 8px !important;
    top: 44px !important;
    width: calc(100vw - 16px) !important;
    max-width: 280px !important;
  }
}

/* FAQ ACCORDION */
.wb-faq-list {
  max-width: 900px;
  margin: 30px auto 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.wb-faq-item {
  background: var(--th-card-bg, #ffffff);
  border: 1px solid var(--th-border, #e2e8f0);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

[data-theme="dark"] .wb-faq-item {
  background: #1e293b;
  border-color: #334155;
}

.wb-faq-question {
  width: 100%;
  padding: 18px 24px;
  text-align: left;
  background: transparent;
  border: none;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--th-text-main, #0f172a);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.wb-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
  padding: 0 24px;
  color: var(--th-text-muted, #475569);
  font-size: 0.98rem;
  line-height: 1.65;
}

.wb-faq-item.active .wb-faq-answer {
  max-height: 500px;
  padding: 0 24px 20px;
}

.wb-faq-item.active .wb-faq-icon {
  transform: rotate(180deg);
}

.wb-faq-icon {
  transition: transform 0.25s ease;
}

/* ============================================================
   PHASE 2: LESSON FLOW, TEACHING ASSETS, LESSON BLOCKS & SPOTLIGHT
   ============================================================ */

/* 1. LESSON FLOW STEPPER BAR */
.wb-lesson-flow-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 14px;
  background: var(--wb-toolbar-bg);
  border-bottom: 1px solid var(--wb-toolbar-border);
  font-size: 0.78rem;
  z-index: 18;
  gap: 8px;
  user-select: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.wb-lesson-flow-bar::-webkit-scrollbar {
  display: none;
}
.wb-flow-label {
  font-weight: 800;
  color: var(--wb-text-dark);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}
.wb-flow-steps {
  display: flex;
  align-items: center;
  gap: 3px;
  overflow-x: auto;
  scrollbar-width: none;
}
.wb-flow-step {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--wb-text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.14s ease;
  white-space: nowrap;
}
.wb-flow-step:hover {
  background: var(--wb-btn-hover);
  color: var(--wb-text-dark);
}
.wb-flow-step.completed {
  background: rgba(16, 185, 129, 0.09);
  color: #059669;
  border-color: rgba(16, 185, 129, 0.25);
}
.wb-flow-step.completed .wb-step-num {
  background: #10b981;
  color: #ffffff;
}
[data-theme="dark"] .wb-flow-step.completed {
  background: rgba(16, 185, 129, 0.16);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}
.wb-flow-step.active {
  background: #2563eb;
  color: #ffffff !important;
  border-color: #1d4ed8;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
}
.wb-flow-step.active .wb-step-num {
  background: rgba(255, 255, 255, 0.28);
  color: #ffffff;
}
.wb-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.08);
  color: var(--wb-text-muted);
  font-size: 0.65rem;
  font-weight: 800;
}
[data-theme="dark"] .wb-step-num {
  background: rgba(255, 255, 255, 0.12);
}
.wb-flow-arrow {
  color: var(--wb-border-light);
  font-size: 0.8rem;
  font-weight: 900;
  user-select: none;
}
.wb-flow-nav {
  display: flex;
  align-items: center;
  gap: 3px;
}
.wb-flow-btn {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  border: 1px solid var(--wb-toolbar-border);
  background: var(--wb-btn-hover);
  color: var(--wb-text-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  transition: all 0.14s ease;
}
.wb-flow-btn:hover {
  background: #2563eb;
  color: #ffffff;
  border-color: #2563eb;
}

/* 2. QUICK ACTIONS DROPDOWN */
.wb-dropdown-wrapper {
  position: relative;
}
.wb-dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--wb-toolbar-bg);
  border: 1px solid var(--wb-toolbar-border);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.18);
  border-radius: 10px;
  padding: 6px;
  min-width: 210px;
  z-index: 65;
  display: flex;
  flex-direction: column;
  gap: 3px;
  animation: wbDropdownFade 0.15s ease-out;
}
@keyframes wbDropdownFade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.wb-dropdown-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 10px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--wb-text-dark);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.12s ease;
  width: 100%;
  box-sizing: border-box;
}
.wb-dropdown-item:hover {
  background: var(--wb-btn-hover);
  color: #2563eb;
  transform: translateX(2px);
}

/* 3. TEACHING ASSETS DRAWER */
.wb-assets-drawer {
  position: absolute;
  top: 8px;
  left: 78px;
  bottom: 8px;
  width: 330px;
  max-width: calc(100vw - 86px);
  background: var(--wb-toolbar-bg);
  border: 1px solid var(--wb-toolbar-border);
  box-shadow: 0 16px 44px rgba(15, 23, 42, 0.22);
  border-radius: 14px;
  z-index: 56;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(14px);
  animation: wbDrawerSlideIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}
@keyframes wbDrawerSlideIn {
  from { opacity: 0; transform: translateX(-10px) scale(0.98); }
  to { opacity: 1; transform: translateX(0) scale(1); }
}
@media (max-width: 768px) {
  .wb-assets-drawer {
    left: 8px;
    right: 8px;
    bottom: 56px;
    top: auto;
    width: auto;
    max-width: none;
    max-height: 65vh;
  }
}
.wb-assets-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--wb-toolbar-border);
  background: var(--wb-toolbar-bg);
}
.wb-assets-title {
  font-size: 0.86rem;
  font-weight: 800;
  color: var(--wb-text-dark);
  display: flex;
  align-items: center;
  gap: 7px;
}
.wb-drawer-close-btn {
  background: transparent;
  border: none;
  color: var(--wb-text-muted);
  font-size: 0.95rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
}
.wb-drawer-close-btn:hover {
  background: var(--wb-btn-hover);
  color: var(--wb-text-dark);
}
.wb-assets-tabs {
  display: flex;
  border-bottom: 1px solid var(--wb-toolbar-border);
  background: var(--wb-btn-hover);
  padding: 2px 4px;
  gap: 2px;
}
.wb-asset-tab {
  flex: 1;
  padding: 7px 4px;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--wb-text-muted);
  font-size: 0.74rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.14s ease;
  white-space: nowrap;
}
.wb-asset-tab:hover {
  color: var(--wb-text-dark);
}
.wb-asset-tab.active {
  background: var(--wb-toolbar-bg);
  color: #2563eb;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}
.wb-assets-tab-content {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  scrollbar-width: thin;
}
.wb-tab-pane {
  display: none;
  flex-direction: column;
  gap: 10px;
}
.wb-tab-pane.active {
  display: flex;
}
.wb-tab-desc {
  font-size: 0.74rem;
  color: var(--wb-text-muted);
  line-height: 1.35;
  margin: 0 0 4px;
}

/* Category Pills */
.wb-category-pills {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.wb-pill-btn {
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--wb-toolbar-border);
  background: var(--wb-btn-hover);
  color: var(--wb-text-dark);
  font-size: 0.68rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.12s ease;
}
.wb-pill-btn:hover {
  border-color: #2563eb;
  color: #2563eb;
}
.wb-pill-btn.active {
  background: #2563eb;
  color: #ffffff;
  border-color: #2563eb;
}

/* Annotations Stamps Grid */
.wb-annotations-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.wb-stamp-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--wb-btn-hover);
  border: 1px solid var(--wb-toolbar-border);
  color: var(--wb-text-dark);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.14s ease;
  user-select: none;
}
.wb-stamp-chip:hover {
  transform: translateY(-1.5px);
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.08);
  box-shadow: 0 3px 8px rgba(37, 99, 235, 0.12);
}
.wb-stamp-icon {
  font-size: 0.95rem;
  line-height: 1;
}

/* Infographics Grid */
.wb-infographics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.wb-info-card {
  display: flex;
  flex-direction: column;
  padding: 10px;
  border-radius: 8px;
  background: var(--wb-btn-hover);
  border: 1px solid var(--wb-toolbar-border);
  cursor: pointer;
  transition: all 0.15s ease;
}
.wb-info-card:hover {
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.06);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.12);
}
.wb-info-icon {
  font-size: 1.15rem;
  color: #2563eb;
  margin-bottom: 4px;
}
.wb-info-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--wb-text-dark);
  margin-bottom: 2px;
}
.wb-info-sub {
  font-size: 0.68rem;
  color: var(--wb-text-muted);
  line-height: 1.3;
}

/* Templates Section */
.wb-templates-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.wb-sec-title {
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--wb-text-dark);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}
.wb-template-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.wb-tmpl-card {
  display: flex;
  flex-direction: column;
  padding: 9px 12px;
  border-radius: 8px;
  background: var(--wb-btn-hover);
  border: 1px solid var(--wb-toolbar-border);
  cursor: pointer;
  transition: all 0.14s ease;
  position: relative;
}
.wb-tmpl-card:hover {
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.06);
  transform: translateX(2px);
}
.wb-tmpl-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 0.64rem;
  font-weight: 800;
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(37, 99, 235, 0.12);
  color: #2563eb;
}
.wb-tmpl-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--wb-text-dark);
  margin-bottom: 2px;
}
.wb-tmpl-desc {
  font-size: 0.7rem;
  color: var(--wb-text-muted);
  line-height: 1.3;
  padding-right: 48px;
}

/* Blocks Catalog */
.wb-blocks-catalog {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.wb-block-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  background: var(--wb-btn-hover);
  border: 1px solid var(--wb-toolbar-border);
  cursor: pointer;
  transition: all 0.14s ease;
}
.wb-block-card:hover {
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.06);
  transform: translateY(-1.5px);
  box-shadow: 0 3px 10px rgba(37, 99, 235, 0.12);
}
.wb-block-icon {
  font-size: 1.25rem;
  line-height: 1;
}
.wb-block-name {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--wb-text-dark);
  margin-bottom: 1px;
}
.wb-block-sub {
  font-size: 0.68rem;
  color: var(--wb-text-muted);
  line-height: 1.3;
}

/* 4. LESSON BLOCKS INTERACTIVE OVERLAY LAYER */
.wb-blocks-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 25;
  overflow: hidden;
}
.wb-lesson-block {
  position: absolute;
  pointer-events: auto;
  user-select: none;
  touch-action: none;
  border-radius: 10px;
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.14);
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.14s ease;
}
.wb-lesson-block:hover {
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.2);
}
.wb-lesson-block.dragging {
  cursor: grabbing !important;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.32) !important;
  z-index: 50 !important;
  opacity: 0.95;
}

/* Block Drag Handle & Action Bar */
.wb-block-drag-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 8px;
  background: rgba(15, 23, 42, 0.05);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 8px 8px 0 0;
  cursor: grab;
  font-size: 0.68rem;
  font-weight: 800;
  color: #475569;
}
.wb-block-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.wb-block-controls {
  display: flex;
  align-items: center;
  gap: 2px;
}
.wb-block-ctrl-btn {
  width: 18px;
  height: 18px;
  border: none;
  background: transparent;
  color: #64748b;
  cursor: pointer;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.64rem;
  transition: all 0.12s ease;
}
.wb-block-ctrl-btn:hover {
  background: rgba(0, 0, 0, 0.1);
  color: #0f172a;
}
.wb-block-ctrl-btn.btn-delete:hover {
  background: #ef4444;
  color: #ffffff;
}

/* Question + Reveal Answer Block */
.wb-block-qa {
  min-width: 260px;
  max-width: 440px;
  border-color: #2563eb;
  border-left-width: 4px;
}
.wb-qa-question {
  padding: 8px 10px;
  font-size: 0.88rem;
  font-weight: 700;
  color: #0f172a;
  outline: none;
  border-bottom: 1px dashed #e2e8f0;
  min-height: 24px;
  line-height: 1.35;
}
.wb-qa-answer-box {
  position: relative;
  padding: 8px 10px;
  min-height: 36px;
  background: #f8fafc;
  border-radius: 0 0 8px 8px;
  overflow: hidden;
}
.wb-qa-answer {
  font-size: 0.84rem;
  color: #1e293b;
  font-weight: 600;
  line-height: 1.35;
  outline: none;
}
.wb-qa-curtain {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.22s ease;
  user-select: none;
}
.wb-qa-curtain:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
}
.wb-qa-curtain.revealed {
  opacity: 0;
  pointer-events: none;
  transform: translateY(100%);
}

/* Key Concept Card */
.wb-block-concept {
  min-width: 250px;
  max-width: 400px;
  border-color: #10b981;
  border-left-width: 4px;
}
.wb-concept-body {
  padding: 10px;
  font-size: 0.86rem;
  font-weight: 600;
  color: #0f172a;
  outline: none;
  line-height: 1.35;
}

/* Sticky Notes */
.wb-block-sticky {
  width: 210px;
  min-height: 150px;
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, 0.08);
}
.wb-block-sticky.sticky-yellow { background: #fef08a; }
.wb-block-sticky.sticky-mint { background: #bbf7d0; }
.wb-block-sticky.sticky-blue { background: #bae6fd; }
.wb-block-sticky.sticky-peach { background: #fed7aa; }
.wb-sticky-content {
  padding: 10px;
  font-size: 0.86rem;
  font-weight: 600;
  color: #1e293b;
  outline: none;
  line-height: 1.4;
  height: calc(100% - 32px);
  box-sizing: border-box;
}

/* Student Task Block */
.wb-block-task {
  min-width: 240px;
  max-width: 380px;
  border-color: #8b5cf6;
  border-left-width: 4px;
}
.wb-task-list {
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.wb-task-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #0f172a;
}
.wb-task-checkbox {
  width: 15px;
  height: 15px;
  cursor: pointer;
  accent-color: #8b5cf6;
}
.wb-task-text {
  outline: none;
  flex: 1;
}

/* Reminder Block */
.wb-block-reminder {
  min-width: 220px;
  border-color: #ef4444;
  border-left-width: 4px;
  background: #fef2f2;
}
.wb-reminder-body {
  padding: 8px 10px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #991b1b;
  outline: none;
}

/* Annotation Badge Stamp Block */
.wb-block-stamp {
  border-radius: 999px;
  padding: 4px 12px;
  background: #ffffff;
  border: 1.5px solid #2563eb;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: grab;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}
.wb-block-stamp .wb-stamp-text {
  font-size: 0.82rem;
  font-weight: 800;
  color: #0f172a;
  outline: none;
}
.wb-block-stamp .wb-stamp-del {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.08);
  color: #64748b;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.58rem;
  line-height: 1;
  margin-left: 2px;
}
.wb-block-stamp .wb-stamp-del:hover {
  background: #ef4444;
  color: #ffffff;
}

/* Infographic Structure Block */
.wb-block-infographic {
  min-width: 320px;
  max-width: 720px;
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  border-radius: 12px;
}
.wb-info-nodes-container {
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 12px 10px;
  gap: 8px;
  flex-wrap: wrap;
}
.wb-info-node {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #0f172a;
  outline: none;
  min-width: 80px;
  text-align: center;
  transition: all 0.14s ease;
}
.wb-info-node:focus {
  border-color: #2563eb;
  background: #ffffff;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}
.wb-info-arrow {
  color: #2563eb;
  font-size: 1.05rem;
  font-weight: 900;
  user-select: none;
}

/* 5. SPOTLIGHT & LASER PRESENTATION OVERLAYS */
.wb-spotlight-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 38;
  pointer-events: none;
}
.wb-laser-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 39;
  pointer-events: none;
}

/* ============================================================
   LESSON WORKSPACE CONTROL SIDEBAR (RIGHT RAIL)
   ============================================================ */
.vff-ad-rail {
  width: 220px;
  min-width: 220px;
  max-width: 220px;
  background: var(--wb-shell-bg, #ffffff);
  border-left: 1px solid var(--wb-toolbar-border, #e2e8f0);
  display: flex;
  flex-direction: column;
  padding: 10px 8px;
  box-sizing: border-box;
  z-index: 10;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
}

[data-theme="dark"] .vff-ad-rail {
  background: #0f172a;
  border-color: #1e293b;
}

.wb-ad-rail-fallback {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.wb-rail-card {
  background: var(--wb-workspace-bg, #f8fafc);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  box-sizing: border-box;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
  transition: all 0.16s ease;
}

[data-theme="dark"] .wb-rail-card {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.wb-rail-card:hover {
  box-shadow: 0 3px 10px rgba(15, 23, 42, 0.05);
  border-color: #cbd5e1;
}

[data-theme="dark"] .wb-rail-card:hover {
  border-color: #475569;
}

.wb-rail-header {
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--wb-text-muted, #64748b);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  display: flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid var(--wb-toolbar-border, #e2e8f0);
  padding-bottom: 5px;
  margin-bottom: 1px;
}

[data-theme="dark"] .wb-rail-header {
  border-color: #334155;
}

.wb-rail-header i {
  color: #2563eb;
  font-size: 0.74rem;
}

[data-theme="dark"] .wb-rail-header i {
  color: #60a5fa;
}

.wb-rail-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  padding: 1px 0;
}

.wb-rail-label {
  color: var(--wb-text-muted, #64748b);
  font-weight: 600;
}

.wb-rail-val {
  color: var(--wb-text-dark, #0f172a);
  font-weight: 700;
  background: var(--wb-shell-bg, #ffffff);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 0.7rem;
}

[data-theme="dark"] .wb-rail-val {
  color: #f8fafc;
  background: #0f172a;
  border-color: #334155;
}

/* Lesson Progress Bar in Rail Status */
.wb-rail-progress-wrap {
  width: 100%;
  margin-top: 4px;
}

.wb-rail-progress-bar {
  width: 100%;
  height: 5px;
  background: rgba(15, 23, 42, 0.06);
  border-radius: 999px;
  overflow: hidden;
}

[data-theme="dark"] .wb-rail-progress-bar {
  background: rgba(255, 255, 255, 0.1);
}

.wb-rail-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #2563eb, #3b82f6);
  border-radius: 999px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.wb-rail-actions-card {
  gap: 5px;
}

.wb-rail-actions-card .wb-rail-action-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 9px;
  border-radius: 8px;
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  background: var(--wb-shell-bg, #ffffff);
  color: var(--wb-text-dark, #0f172a);
  font-family: var(--wb-font-main, 'Plus Jakarta Sans', sans-serif);
  font-size: 0.73rem;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  width: 100%;
  box-sizing: border-box;
}

[data-theme="dark"] .wb-rail-actions-card .wb-rail-action-btn {
  background: #0f172a;
  border-color: #334155;
  color: #f1f5f9;
}

.wb-rail-action-btn:hover {
  background: var(--wb-btn-hover, #f1f5f9) !important;
  color: #0f172a !important;
  border-color: #cbd5e1 !important;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.05);
  transform: translateX(2px);
}

[data-theme="dark"] .wb-rail-action-btn:hover {
  background: #1e293b !important;
  color: #f8fafc !important;
  border-color: #475569 !important;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.wb-rail-action-btn:active {
  transform: translateX(0);
}

.wb-rail-action-btn i {
  font-size: 0.76rem;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(37, 99, 235, 0.08);
  color: #2563eb;
  flex-shrink: 0;
  transition: background-color 0.15s ease;
}

.wb-rail-action-btn:hover i {
  background: rgba(37, 99, 235, 0.16);
}

[data-theme="dark"] .wb-rail-action-btn i {
  background: rgba(96, 165, 250, 0.14);
  color: #60a5fa;
}


/* ============================================================
   TOOLTIP SYSTEM
   ============================================================ */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%) scale(0.92);
  background: #0f172a;
  color: #f8fafc;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 6px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.14s ease, transform 0.14s ease;
  z-index: 999;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

[data-tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) scale(1);
}

.wb-utility-cluster [data-tooltip]::after,
.wb-context-bar [data-tooltip]::after {
  left: 50%;
  top: calc(100% + 6px);
  transform: translateX(-50%) scale(0.92);
}

.wb-utility-cluster [data-tooltip]:hover::after,
.wb-context-bar [data-tooltip]:hover::after {
  transform: translateX(-50%) scale(1);
}

@media (max-width: 768px) {
  [data-tooltip]::after {
    display: none !important;
  }
}

/* ============================================================
   NEW LESSON BLOCKS STYLES
   ============================================================ */
/* Model Example Card */
.wb-block-example {
  min-width: 270px;
  max-width: 420px;
  border-color: #6366f1;
  border-left-width: 4px;
}
.wb-example-body {
  padding: 9px 11px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.wb-example-problem {
  font-size: 0.84rem;
  font-weight: 700;
  color: #0f172a;
  outline: none;
  background: #f8fafc;
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid #e2e8f0;
}
.wb-example-steps {
  font-size: 0.8rem;
  color: #334155;
  outline: none;
  line-height: 1.4;
  white-space: pre-wrap;
}

/* Key Takeaway Card */
.wb-block-takeaway {
  min-width: 250px;
  max-width: 380px;
  border-color: #f59e0b;
  border-left-width: 4px;
  background: #fffbeb;
}
.wb-takeaway-body {
  padding: 10px 12px;
  font-size: 0.84rem;
  font-weight: 700;
  color: #78350f;
  outline: none;
  line-height: 1.35;
}

/* Vocabulary Card */
.wb-block-vocab {
  min-width: 260px;
  max-width: 390px;
  border-color: #0ea5e9;
  border-left-width: 4px;
}
.wb-vocab-body {
  padding: 9px 12px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.wb-vocab-header-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.wb-vocab-word {
  font-size: 0.95rem;
  font-weight: 800;
  color: #0369a1;
  outline: none;
}
.wb-vocab-pos {
  font-size: 0.68rem;
  font-style: italic;
  color: #64748b;
  outline: none;
}
.wb-vocab-meaning {
  font-size: 0.82rem;
  font-weight: 600;
  color: #0f172a;
  outline: none;
  line-height: 1.3;
}
.wb-vocab-example {
  font-size: 0.78rem;
  color: #475569;
  font-style: italic;
  border-left: 2px solid #38bdf8;
  padding-left: 6px;
  outline: none;
}

/* Teacher Tip */
.wb-block-tip {
  min-width: 240px;
  max-width: 360px;
  border-color: #14b8a6;
  border-left-width: 4px;
  background: #f0fdfa;
}
.wb-tip-body {
  padding: 9px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #115e59;
  outline: none;
  line-height: 1.35;
}

/* Definition Card */
.wb-block-definition {
  min-width: 260px;
  max-width: 400px;
  border-color: #3b82f6;
  border-left-width: 4px;
}
.wb-definition-body {
  padding: 9px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.wb-definition-term {
  font-size: 0.9rem;
  font-weight: 800;
  color: #1d4ed8;
  outline: none;
}
.wb-definition-text {
  font-size: 0.82rem;
  color: #1e293b;
  font-weight: 500;
  line-height: 1.35;
  outline: none;
}

/* Compare & Contrast Block */
.wb-block-compare-block {
  min-width: 300px;
  max-width: 480px;
  border-color: #8b5cf6;
  border-left-width: 4px;
}
.wb-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 8px 10px;
  gap: 10px;
}
.wb-compare-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.78rem;
  color: #1e293b;
  line-height: 1.35;
  outline: none;
  white-space: pre-wrap;
}
.wb-compare-col:first-child {
  border-right: 1px solid #e2e8f0;
  padding-right: 8px;
}

/* ============================================================
   SCOPED NAVBAR COMPACTNESS & FOOTER CONTRAST ENHANCEMENT
   ============================================================ */
body.toolhub-body nav.navbar.toolhub-single-nav {
  padding-top: 6px !important;
  padding-bottom: 6px !important;
}
body.toolhub-body .toolhub-saas-hero.wb-hero {
  padding: 8px 16px 2px !important;
}

footer.footer {
  background: #090d16 !important;
  color: #cbd5e1 !important;
}
footer.footer h4 {
  color: #ffffff !important;
  font-weight: 800 !important;
}
footer.footer a {
  color: #94a3b8 !important;
  transition: color 0.15s ease;
}
footer.footer a:hover {
  color: #38bdf8 !important;
}
footer.footer p {
  color: #94a3b8 !important;
}
footer.footer div {
  border-color: #1e293b !important;
}

/* ============================================================
   PRINT MEDIA STYLES
   ============================================================ */
@media print {
  body * {
    visibility: hidden;
  }
  
  #whiteboardCanvas, .wb-canvas-container, .wb-app-wrapper {
    visibility: visible;
  }
  
  .wb-studio-header, .wb-toolbar, .wb-context-bar, .wb-float-controls, #wbDirectText,
  .vff-ad-slot, .vff-ad-rail, #vffAdPresentation, .wb-floating-pdf-nav,
  .wb-pres-tools-btn, .wb-pres-tool-panel, .wb-subject-drawer, .wb-empty-state,
  .reading-progress-bar, nav, header, footer, .wb-faq-list, .toolhub-seo-section {
    display: none !important;
  }

  .wb-app-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    border: none;
    box-shadow: none;
    border-radius: 0;
    margin: 0;
    padding: 0;
    background: #ffffff;
  }

  .wb-workspace-grid, .wb-canvas-container {
    width: 100vw;
    height: 100vh;
    margin: 0;
    border: none;
    border-radius: 0;
  }

  #whiteboardCanvas {
    width: 100% !important;
    height: 100% !important;
  }
}

/* Active Highlight for Assets Trigger Buttons */
#wbHeaderAssetsBtn.active,
#wbToolbarAssetsBtn.active,
#wbPresHeaderAssetsBtn.active,
#wbPresAssetsBtn.active {
  background: #2563eb !important;
  color: #ffffff !important;
  border-color: #2563eb !important;
}

#wbHeaderAssetsBtn.active i,
#wbToolbarAssetsBtn.active i,
#wbPresHeaderAssetsBtn.active i,
#wbPresAssetsBtn.active i {
  color: #ffffff !important;
}

/* ============================================================
   TEACHER FEEDBACK & FEATURE REQUEST SECTION (ZERO BACKEND)
   ============================================================ */
.wb-feedback-section {
  max-width: 960px;
  margin: 30px auto 40px;
  padding: 0 16px;
  box-sizing: border-box;
}

.wb-feedback-card {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.04), rgba(15, 23, 42, 0.02));
  border: 1.5px solid var(--wb-toolbar-border);
  border-radius: 16px;
  padding: 32px 36px;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}

[data-theme="dark"] .wb-feedback-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.7), rgba(15, 23, 42, 0.8));
  border-color: #334155;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.wb-feedback-header {
  margin-bottom: 20px;
}

.wb-feedback-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(37, 99, 235, 0.09);
  color: #2563eb;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  margin-bottom: 10px;
}

[data-theme="dark"] .wb-feedback-badge {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
}

.wb-feedback-title {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  font-weight: 800;
  color: var(--wb-text-dark);
  margin: 0 0 8px;
  line-height: 1.25;
}

.wb-feedback-sub {
  font-size: 0.95rem;
  color: var(--wb-text-muted);
  margin: 0;
  line-height: 1.55;
  max-width: 680px;
}

.wb-feedback-voting {
  margin-bottom: 20px;
}

.wb-feedback-prompt {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--wb-text-dark);
  margin: 0 0 4px;
}

.wb-feedback-hint {
  font-size: 0.82rem;
  color: var(--wb-text-muted);
  margin: 0 0 12px;
}

.wb-feedback-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.wb-feedback-chip {
  background: var(--wb-toolbar-bg);
  border: 1px solid var(--wb-toolbar-border);
  color: var(--wb-text-dark);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.wb-feedback-chip:hover {
  border-color: #2563eb;
  color: #2563eb;
  background: rgba(37, 99, 235, 0.06);
  transform: translateY(-1px);
}

.wb-feedback-chip.selected {
  background: #2563eb;
  border-color: #2563eb;
  color: #ffffff;
}

.wb-feedback-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.wb-feedback-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.wb-feedback-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--wb-text-dark);
}

.wb-feedback-textarea {
  width: 100%;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--wb-toolbar-border);
  background: var(--wb-toolbar-bg);
  color: var(--wb-text-dark);
  font-family: inherit;
  font-size: 0.88rem;
  line-height: 1.5;
  resize: vertical;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.wb-feedback-textarea:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.wb-feedback-inputs-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 640px) {
  .wb-feedback-inputs-row {
    grid-template-columns: 1fr;
  }
}

.wb-feedback-input {
  width: 100%;
  padding: 9px 12px;
  border-radius: 8px;
  border: 1px solid var(--wb-toolbar-border);
  background: var(--wb-toolbar-bg);
  color: var(--wb-text-dark);
  font-family: inherit;
  font-size: 0.86rem;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.wb-feedback-input:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.wb-feedback-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--wb-text-muted);
  line-height: 1.4;
  padding: 8px 12px;
  background: rgba(15, 23, 42, 0.03);
  border-radius: 8px;
  border: 1px solid var(--wb-toolbar-border);
}

[data-theme="dark"] .wb-feedback-notice {
  background: rgba(255, 255, 255, 0.03);
}

.wb-feedback-notice i {
  color: #10b981;
  font-size: 0.9rem;
}

.wb-feedback-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.wb-feedback-btn {
  padding: 10px 22px;
  font-size: 0.9rem;
  border-radius: 10px;
  text-decoration: none;
}

/* ============================================================
   FINAL VFF ECOSYSTEM BRAND CTA SECTION
   ============================================================ */
#wbFinalCtaSection.wb-final-cta-section {
  max-width: 960px;
  margin: 0 auto 60px;
  padding: 0 16px;
  box-sizing: border-box;
}

body.vff-presentation-active #wbFinalCtaSection,
.wb-app-wrapper.presentation-mode ~ #wbFinalCtaSection {
  display: none !important;
}

#wbFinalCtaSection .wb-final-cta-card {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-radius: 20px;
  padding: 44px 32px 36px;
  text-align: center;
  color: #ffffff !important;
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-sizing: border-box;
}

#wbFinalCtaSection .wb-final-cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: #38bdf8 !important;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

#wbFinalCtaSection .wb-final-cta-title {
  font-size: clamp(1.55rem, 2.5vw, 2.1rem);
  font-weight: 800;
  color: #ffffff !important;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  margin: 0 auto 12px;
  line-height: 1.25;
  max-width: 720px;
}

#wbFinalCtaSection .wb-final-cta-desc {
  font-size: 1.02rem;
  color: #cbd5e1 !important;
  max-width: 660px;
  margin: 0 auto 28px;
  line-height: 1.65;
}

/* Curated Content Area: Keep Learning with VFF */
#wbFinalCtaSection .wb-cta-content-area {
  margin: 28px auto 32px;
  max-width: 860px;
}

#wbFinalCtaSection .wb-cta-content-heading {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: #94a3b8 !important;
  margin: 0 0 16px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

#wbFinalCtaSection .wb-cta-content-heading::before,
#wbFinalCtaSection .wb-cta-content-heading::after {
  content: '';
  height: 1px;
  width: 40px;
  background: rgba(255, 255, 255, 0.15);
}

#wbFinalCtaSection .wb-cta-content-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

#wbFinalCtaSection .wb-cta-content-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 14px 16px;
  text-align: left;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}

#wbFinalCtaSection .wb-cta-content-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(96, 165, 250, 0.45);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

#wbFinalCtaSection .wb-cta-content-card:focus-visible {
  outline: 2px solid #60a5fa;
  outline-offset: 2px;
}

#wbFinalCtaSection .wb-cta-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

#wbFinalCtaSection .wb-cta-card-icon {
  font-size: 0.95rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

#wbFinalCtaSection .wb-cta-card-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: #f8fafc !important;
  line-height: 1.35;
  transition: color 0.15s ease;
}

#wbFinalCtaSection .wb-cta-content-card:hover .wb-cta-card-title {
  color: #60a5fa !important;
}

#wbFinalCtaSection .wb-cta-card-desc {
  font-size: 0.8rem;
  color: #94a3b8 !important;
  line-height: 1.45;
  margin: 0;
  padding-left: 28px;
}

/* Primary CTA Action Buttons */
#wbFinalCtaSection .wb-final-cta-buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

#wbFinalCtaSection .wb-cta-large {
  padding: 12px 22px;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: 10px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.18s ease;
}

#wbFinalCtaSection .wb-btn-primary {
  background: #2563eb;
  color: #ffffff !important;
  border: 1px solid #3b82f6;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

#wbFinalCtaSection .wb-btn-primary:hover {
  background: #1d4ed8;
  border-color: #60a5fa;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.55);
  transform: translateY(-1px);
}

#wbFinalCtaSection .wb-btn-light {
  background: #ffffff;
  color: #0f172a !important;
  border: 1px solid #ffffff;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

#wbFinalCtaSection .wb-btn-light:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
  color: #0f172a !important;
  transform: translateY(-1px);
}

#wbFinalCtaSection .wb-btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #f8fafc !important;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

#wbFinalCtaSection .wb-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff !important;
  border-color: rgba(255, 255, 255, 0.45);
  transform: translateY(-1px);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  #wbFinalCtaSection .wb-cta-content-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  #wbFinalCtaSection .wb-final-cta-card {
    padding: 32px 20px;
  }
}

@media (max-width: 600px) {
  #wbFinalCtaSection .wb-final-cta-buttons {
    flex-direction: column;
    width: 100%;
  }
  #wbFinalCtaSection .wb-cta-large {
    width: 100%;
    justify-content: center;
    box-sizing: border-box;
  }
}

/* ============================================================
   PHASE 2.7: TEACHING DATA CONSENT UX & PRIVACY SETTINGS
   Local-first, accessible, non-coercive, WCAG AA compliant
   ============================================================ */
.wb-consent-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
  box-sizing: border-box;
}

.wb-consent-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

body.wb-modal-open {
  overflow: hidden;
}

/* Modal Window */
.wb-consent-modal,
.wb-privacy-modal {
  background: var(--wb-toolbar-bg, #ffffff);
  color: var(--wb-text-dark, #0f172a);
  border: 1px solid var(--wb-toolbar-border, #cbd5e1);
  border-radius: 16px;
  max-width: 580px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px 26px;
  box-shadow: 0 20px 48px -8px rgba(15, 23, 42, 0.35);
  transform: translateY(14px) scale(0.98);
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}

.wb-consent-backdrop.active .wb-consent-modal,
.wb-consent-backdrop.active .wb-privacy-modal {
  transform: translateY(0) scale(1);
}

/* Header */
.wb-consent-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.wb-consent-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

[data-theme="dark"] .wb-consent-badge {
  background: rgba(96, 165, 250, 0.16);
  color: #60a5fa;
}

.wb-consent-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--wb-text-muted, #64748b);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.wb-consent-close-btn:hover {
  background: var(--wb-btn-hover, #f1f5f9);
  color: var(--wb-text-dark, #0f172a);
}

/* Typography */
.wb-consent-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--wb-text-dark, #0f172a);
  margin: 0 0 10px;
  line-height: 1.25;
  letter-spacing: -0.2px;
}

.wb-consent-main-copy {
  font-size: 0.95rem;
  color: var(--wb-text-dark, #334155);
  line-height: 1.5;
  margin: 0 0 16px;
}

/* Guarantees Box */
.wb-consent-guarantees {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid rgba(16, 185, 129, 0.22);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 16px;
}

[data-theme="dark"] .wb-consent-guarantees {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.3);
}

.wb-consent-guarantee-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.84rem;
  line-height: 1.42;
  color: var(--wb-text-dark, #1e293b);
}

.wb-consent-guarantee-item i {
  margin-top: 2px;
  flex-shrink: 0;
  font-size: 0.95rem;
}

/* Accordion Details */
.wb-consent-accordion {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.wb-consent-details {
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 10px;
  overflow: hidden;
  background: var(--wb-toolbar-bg, #ffffff);
  transition: border-color 0.16s ease;
}

.wb-consent-details[open] {
  border-color: #93c5fd;
}

.wb-consent-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
  cursor: pointer;
  user-select: none;
  list-style: none;
}

.wb-consent-summary::-webkit-details-marker {
  display: none;
}

.wb-consent-summary:hover {
  background: var(--wb-btn-hover, #f8fafc);
}

.wb-consent-chevron {
  font-size: 0.72rem;
  color: var(--wb-text-muted, #64748b);
  transition: transform 0.2s ease;
}

.wb-consent-details[open] .wb-consent-chevron {
  transform: rotate(180deg);
}

.wb-consent-details-body {
  padding: 10px 14px 14px;
  font-size: 0.82rem;
  line-height: 1.48;
  color: var(--wb-text-muted, #475569);
  border-top: 1px solid var(--wb-toolbar-border, #f1f5f9);
}

.wb-consent-details-body p {
  margin: 0 0 8px;
}

.wb-consent-category-list,
.wb-consent-excluded-list {
  margin: 0 0 10px;
  padding-left: 18px;
}

.wb-consent-category-list li,
.wb-consent-excluded-list li {
  margin-bottom: 4px;
}

.wb-consent-note {
  font-size: 0.76rem;
  color: var(--wb-text-muted, #64748b);
  margin: 0;
}

/* Action Buttons: EQUAL VISUAL IMPORTANCE */
.wb-consent-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}

.wb-consent-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.18s ease;
  border: 1.5px solid transparent;
  outline: none;
  user-select: none;
}

.wb-consent-btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.4);
}

.wb-consent-btn-secondary {
  background: var(--wb-btn-hover, #f1f5f9);
  color: var(--wb-text-dark, #0f172a);
  border-color: var(--wb-toolbar-border, #cbd5e1);
}

.wb-consent-btn-secondary:hover {
  background: #e2e8f0;
  border-color: #94a3b8;
  transform: translateY(-1px);
}

.wb-consent-btn-primary {
  background: #2563eb;
  color: #ffffff;
  border-color: #1d4ed8;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.28);
}

.wb-consent-btn-primary:hover {
  background: #1d4ed8;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
  transform: translateY(-1px);
}

/* Privacy Settings Drawer / Modal Specifics */
.wb-privacy-modal {
  max-width: 540px;
}

.wb-privacy-status-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--wb-btn-hover, #f8fafc);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 12px;
}

.wb-privacy-status-label {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
}

.wb-privacy-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
}

.wb-privacy-status-badge .wb-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #94a3b8;
}

.wb-privacy-status-badge.status-granted {
  background: rgba(16, 185, 129, 0.12);
  color: #059669;
}
.wb-privacy-status-badge.status-granted .wb-status-dot {
  background: #10b981;
}

.wb-privacy-status-badge.status-denied {
  background: rgba(100, 116, 139, 0.12);
  color: #475569;
}

.wb-privacy-status-badge.status-revoked {
  background: rgba(239, 68, 68, 0.12);
  color: #dc2626;
}
.wb-privacy-status-badge.status-revoked .wb-status-dot {
  background: #ef4444;
}

.wb-privacy-status-badge.status-unknown {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
}
.wb-privacy-status-badge.status-unknown .wb-status-dot {
  background: #f59e0b;
}

.wb-privacy-desc {
  font-size: 0.85rem;
  line-height: 1.48;
  color: var(--wb-text-muted, #475569);
  margin: 0 0 16px;
}

.wb-privacy-controls {
  margin-bottom: 20px;
}

.wb-privacy-action-btn {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.16s ease;
  border: 1px solid transparent;
}

.wb-privacy-action-btn.btn-primary {
  background: #2563eb;
  color: #ffffff;
  border-color: #1d4ed8;
}

.wb-privacy-action-btn.btn-primary:hover {
  background: #1d4ed8;
}

.wb-privacy-action-btn.btn-danger {
  background: rgba(239, 68, 68, 0.08);
  color: #dc2626;
  border-color: rgba(239, 68, 68, 0.28);
}

.wb-privacy-action-btn.btn-danger:hover {
  background: #ef4444;
  color: #ffffff;
}

.wb-privacy-category-section {
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 16px;
}

.wb-privacy-section-title {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--wb-text-muted, #64748b);
  margin-bottom: 8px;
}

.wb-privacy-category-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--wb-toolbar-border, #f1f5f9);
}

.wb-privacy-category-row:last-child {
  border-bottom: none;
}

.wb-cat-info {
  display: flex;
  flex-direction: column;
}

.wb-cat-info strong {
  font-size: 0.82rem;
  color: var(--wb-text-dark, #0f172a);
}

.wb-cat-info span {
  font-size: 0.72rem;
  color: var(--wb-text-muted, #64748b);
}

.wb-cat-status {
  font-size: 0.74rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.wb-cat-status.status-active {
  background: rgba(16, 185, 129, 0.12);
  color: #059669;
}

.wb-cat-status.status-disabled {
  background: rgba(100, 116, 139, 0.1);
  color: #64748b;
}

.wb-cat-status.status-local {
  background: rgba(37, 99, 235, 0.08);
  color: #2563eb;
}

.wb-privacy-meta-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--wb-btn-hover, #f8fafc);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.76rem;
  color: var(--wb-text-muted, #64748b);
  margin-bottom: 14px;
}

.wb-meta-row {
  display: flex;
  justify-content: space-between;
}

.wb-privacy-raw-details {
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.78rem;
}

.wb-privacy-raw-summary {
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
  color: var(--wb-text-muted, #64748b);
  user-select: none;
}

.wb-privacy-raw-json {
  background: #0f172a;
  color: #38bdf8;
  padding: 10px 12px;
  margin: 0;
  border-radius: 0 0 8px 8px;
  font-family: monospace;
  font-size: 0.72rem;
  overflow-x: auto;
  max-height: 140px;
}

.wb-privacy-footer-actions {
  display: flex;
  justify-content: flex-end;
}

.wb-privacy-reset-btn {
  background: transparent;
  border: none;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--wb-text-muted, #64748b);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.wb-privacy-reset-btn:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.06);
}

/* Dark Mode Overrides */
[data-theme="dark"] .wb-consent-modal,
[data-theme="dark"] .wb-privacy-modal {
  background: #1e293b;
  color: #f8fafc;
  border-color: #334155;
  box-shadow: 0 20px 48px -8px rgba(0, 0, 0, 0.7);
}

[data-theme="dark"] .wb-consent-main-copy,
[data-theme="dark"] .wb-consent-guarantee-item {
  color: #cbd5e1;
}

[data-theme="dark"] .wb-consent-details,
[data-theme="dark"] .wb-privacy-category-section,
[data-theme="dark"] .wb-privacy-raw-details {
  border-color: #334155;
  background: #0f172a;
}

[data-theme="dark"] .wb-consent-details-body {
  border-top-color: #1e293b;
  color: #94a3b8;
}

[data-theme="dark"] .wb-consent-btn-secondary {
  background: #334155;
  color: #f8fafc;
  border-color: #475569;
}

[data-theme="dark"] .wb-consent-btn-secondary:hover {
  background: #475569;
}

[data-theme="dark"] .wb-privacy-status-box,
[data-theme="dark"] .wb-privacy-meta-box {
  background: #0f172a;
  border-color: #334155;
}

[data-theme="dark"] .wb-privacy-category-row {
  border-bottom-color: #1e293b;
}

[data-theme="dark"] .wb-cat-info strong {
  color: #f8fafc;
}

@media (max-width: 540px) {
  .wb-consent-actions {
    grid-template-columns: 1fr;
  }
  .wb-consent-modal,
  .wb-privacy-modal {
    padding: 18px 16px;
  }
}

/* ============================================================
   TEACHING STUDIO RECORDING SYSTEM (PHASE 3)
   Browser-native, local-first lesson recording with multi-layer
   compositor, MediaRecorder, and optional microphone audio.
   ============================================================ */

/* Recording Cluster in Header */
.wb-record-cluster {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--wb-toolbar-bg, #ffffff);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  padding: 3px 8px;
  border-radius: 999px;
  transition: all 0.18s ease;
}

[data-theme="dark"] .wb-record-cluster {
  background: rgba(30, 41, 59, 0.7);
  border-color: #334155;
}

/* Record Button */
.wb-btn-record {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: transparent;
  color: var(--wb-text-dark, #0f172a);
  border: 1.5px solid rgba(239, 68, 68, 0.4);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.18s ease;
  user-select: none;
}

.wb-btn-record:hover {
  background: rgba(239, 68, 68, 0.08);
  border-color: #ef4444;
  color: #dc2626;
}

.wb-record-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: #ef4444;
  display: inline-block;
  flex-shrink: 0;
}

/* Active Recording State */
.wb-btn-record.recording {
  background: #dc2626 !important;
  color: #ffffff !important;
  border-color: #b91c1c !important;
  box-shadow: 0 0 12px rgba(220, 38, 38, 0.45);
}

.wb-btn-record.recording .wb-record-dot {
  background-color: #ffffff;
}

/* Recording Status Indicator & Timer */
.wb-recording-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: #dc2626;
  user-select: none;
}

[data-theme="dark"] .wb-recording-indicator {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.wb-rec-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #ef4444;
  animation: wbRecPulseAnim 1.2s infinite ease-in-out;
  display: inline-block;
}

@keyframes wbRecPulseAnim {
  0% { transform: scale(0.85); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.45; }
  100% { transform: scale(0.85); opacity: 1; }
}

.wb-rec-timer {
  font-family: inherit;
  letter-spacing: 0.5px;
}

/* Microphone Toggle */
.wb-mic-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--wb-text-muted, #64748b);
  cursor: pointer;
  user-select: none;
  padding: 2px 4px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.wb-mic-toggle:hover {
  color: var(--wb-text-dark, #0f172a);
}

.wb-mic-toggle input[type="checkbox"] {
  cursor: pointer;
  accent-color: #2563eb;
  width: 13px;
  height: 13px;
  margin: 0;
}

.wb-mic-toggle input[type="checkbox"]:checked ~ i {
  color: #2563eb;
}

/* Presentation Mode Recording Button & Indicator */
.wb-pres-btn-record {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-color: rgba(239, 68, 68, 0.45) !important;
}

.wb-pres-btn-record:hover {
  border-color: #ef4444 !important;
  background: rgba(239, 68, 68, 0.15) !important;
  color: #f87171 !important;
}

.wb-pres-btn-record.recording {
  background: #dc2626 !important;
  color: #ffffff !important;
  border-color: #b91c1c !important;
}

.wb-pres-rec-indicator {
  margin-left: 2px;
}

/* Recording Review Modal & Panel */
.wb-recording-backdrop {
  z-index: 99999;
}

.wb-recording-modal-card {
  background: var(--wb-toolbar-bg, #ffffff);
  border: 1.5px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 16px;
  padding: 22px 24px;
  max-width: 660px;
  width: 95%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 45px -8px rgba(0, 0, 0, 0.35);
  animation: wbModalSlideIn 0.22s ease-out;
}

[data-theme="dark"] .wb-recording-modal-card {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 20px 45px -8px rgba(0, 0, 0, 0.6);
}

.wb-rec-badge {
  background: rgba(37, 99, 235, 0.08) !important;
  color: #2563eb !important;
  border: 1px solid rgba(37, 99, 235, 0.22) !important;
}

[data-theme="dark"] .wb-rec-badge {
  background: rgba(37, 99, 235, 0.2) !important;
  color: #60a5fa !important;
  border-color: rgba(96, 165, 250, 0.35) !important;
}

.wb-rec-player-container {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #090d16;
  border-radius: 12px;
  overflow: hidden;
  margin: 14px 0 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #334155;
}

.wb-rec-video-element {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #000000;
}

.wb-rec-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}

.wb-rec-meta-item {
  background: var(--wb-workspace-bg, #f8fafc);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  padding: 8px 12px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

[data-theme="dark"] .wb-rec-meta-item {
  background: #0f172a;
  border-color: #334155;
}

.wb-rec-meta-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--wb-text-muted, #64748b);
}

.wb-rec-meta-val {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--wb-text-dark, #0f172a);
}

[data-theme="dark"] .wb-rec-meta-val {
  color: #f8fafc;
}

.wb-rec-privacy-notice {
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--wb-text-muted, #64748b);
  margin: 0 0 18px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

[data-theme="dark"] .wb-rec-privacy-notice {
  color: #94a3b8;
}

.wb-rec-actions-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--wb-toolbar-border, #e2e8f0);
}

[data-theme="dark"] .wb-rec-actions-bar {
  border-top-color: #334155;
}

.wb-rec-right-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

@media (max-width: 640px) {
  .wb-rec-meta-grid {
    grid-template-columns: 1fr;
  }
  .wb-rec-actions-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .wb-rec-right-actions {
    justify-content: stretch;
  }
  .wb-rec-right-actions .wb-btn {
    flex: 1;
    text-align: center;
    justify-content: center;
  }
}

/* Automatic Recording Download Status Banner */
.wb-rec-download-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #059669;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 8px 12px;
  border-radius: 8px;
  margin-bottom: 12px;
}

[data-theme="dark"] .wb-rec-download-notice {
  background: rgba(16, 185, 129, 0.18);
  border-color: rgba(16, 185, 129, 0.35);
  color: #34d399;
}

.wb-rec-download-notice.notice-warn {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: #d97706;
}

[data-theme="dark"] .wb-rec-download-notice.notice-warn {
  background: rgba(245, 158, 11, 0.18);
  border-color: rgba(245, 158, 11, 0.35);
  color: #fbbf24;
}

/* Non-blocking Floating Download Confirmation Toast */
.wb-rec-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #0f172a;
  color: #f8fafc;
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: 0 10px 25px -4px rgba(0, 0, 0, 0.35);
  font-size: 0.84rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 100000;
  opacity: 0;
  transform: translateY(12px);
  transition: all 0.25s ease;
  pointer-events: none;
}

.wb-rec-toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.wb-rec-toast i {
  color: #10b981;
}

.wb-rec-toast.warn i {
  color: #f59e0b;
}

/* ============================================================
   PHASE 2.8: TEACHING OBJECT SELECTION & FLOATING TOOLBAR
   ============================================================ */
.wb-selection-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 35;
}

.wb-selection-box {
  position: absolute;
  border: 1.5px solid #2563eb;
  background: rgba(37, 99, 235, 0.04);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.85), 0 2px 10px rgba(37, 99, 235, 0.12);
  pointer-events: auto;
  cursor: move;
  box-sizing: border-box;
  user-select: none;
  touch-action: none;
  border-radius: 2px;
}

.wb-selection-box.locked {
  border: 1.5px dashed #64748b;
  background: rgba(100, 116, 139, 0.06);
  box-shadow: none;
  cursor: default;
}

.wb-selection-box.locked .wb-handle {
  display: none !important;
}

/* 8 Interactive Handles */
.wb-handle {
  position: absolute;
  width: 9px;
  height: 9px;
  background: #ffffff;
  border: 1.5px solid #2563eb;
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  pointer-events: auto;
  transform: translate(-50%, -50%);
  transition: transform 0.12s ease, background 0.12s ease;
  z-index: 38;
}

.wb-handle:hover {
  transform: translate(-50%, -50%) scale(1.35);
  background: #2563eb;
}

.handle-nw { top: 0; left: 0; cursor: nwse-resize; }
.handle-n  { top: 0; left: 50%; cursor: ns-resize; border-radius: 2px; }
.handle-ne { top: 0; left: 100%; cursor: nesw-resize; }
.handle-e  { top: 50%; left: 100%; cursor: ew-resize; border-radius: 2px; }
.handle-se { top: 100%; left: 100%; cursor: nwse-resize; }
.handle-s  { top: 100%; left: 50%; cursor: ns-resize; border-radius: 2px; }
.handle-sw { top: 100%; left: 0; cursor: nesw-resize; }
.handle-w  { top: 50%; left: 0; cursor: ew-resize; border-radius: 2px; }

/* Floating Contextual Mini-Toolbar */
.wb-floating-context-toolbar {
  position: absolute;
  top: -44px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 3px;
  background: #ffffff;
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  border-radius: 999px;
  padding: 3px 8px;
  box-shadow: 0 4px 16px -2px rgba(15, 23, 42, 0.14), 0 2px 6px -1px rgba(15, 23, 42, 0.08);
  pointer-events: auto;
  z-index: 40;
  white-space: nowrap;
}

[data-theme="dark"] .wb-floating-context-toolbar {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 6px 20px -2px rgba(0, 0, 0, 0.5);
}

.wb-floating-context-toolbar.position-bottom {
  top: auto;
  bottom: -44px;
}

.wb-sel-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 800;
  color: #2563eb;
  padding: 2px 8px;
  background: rgba(37, 99, 235, 0.08);
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

[data-theme="dark"] .wb-sel-type-badge {
  color: #60a5fa;
  background: rgba(37, 99, 235, 0.2);
}

.wb-sel-divider {
  width: 1px;
  height: 18px;
  background: var(--wb-toolbar-border, #e2e8f0);
  margin: 0 3px;
}

[data-theme="dark"] .wb-sel-divider {
  background: #334155;
}

.wb-sel-btn {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--wb-text-dark, #0f172a);
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.14s ease;
}

.wb-sel-btn:hover {
  background: var(--wb-btn-hover, #f1f5f9);
  color: #2563eb;
}

[data-theme="dark"] .wb-sel-btn:hover {
  color: #60a5fa;
  background: #334155;
}

.wb-sel-btn.wb-sel-danger:hover {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
}

/* Popover Panels (Shapes & Math) */
.wb-popover-drawer {
  position: absolute;
  top: 10px;
  left: 78px;
  z-index: 55;
  background: var(--wb-toolbar-bg, #ffffff);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.16);
  border-radius: 12px;
  padding: 14px;
  width: 280px;
  box-sizing: border-box;
  animation: wbPopFadeIn 0.16s ease-out;
}

@keyframes wbPopFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

[data-theme="dark"] .wb-popover-drawer {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.wb-popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--wb-toolbar-border, #e2e8f0);
  padding-bottom: 8px;
  margin-bottom: 10px;
}

[data-theme="dark"] .wb-popover-header {
  border-bottom-color: #334155;
}

.wb-popover-title {
  font-size: 0.84rem;
  font-weight: 800;
  color: var(--wb-text-dark, #0f172a);
  display: flex;
  align-items: center;
  gap: 8px;
}

.wb-popover-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 480px;
  overflow-y: auto;
  scrollbar-width: thin;
}

.wb-popover-category {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: #64748b;
  margin-top: 4px;
  margin-bottom: 2px;
}

[data-theme="dark"] .wb-popover-category {
  color: #94a3b8;
}

.wb-shape-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.wb-shape-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: var(--wb-btn-hover, #f1f5f9);
  color: var(--wb-text-dark, #0f172a);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
  transition: all 0.14s ease;
}

.wb-shape-btn i {
  font-size: 0.88rem;
  width: 18px;
  text-align: center;
  color: #2563eb;
}

[data-theme="dark"] .wb-shape-btn {
  background: rgba(30, 41, 59, 0.7);
  color: #f8fafc;
}

[data-theme="dark"] .wb-shape-btn i {
  color: #60a5fa;
}

.wb-shape-btn:hover {
  background: #2563eb;
  color: #ffffff;
  transform: translateX(2px);
}

.wb-shape-btn:hover i {
  color: #ffffff;
}

.wb-shape-btn.active {
  background: #2563eb !important;
  color: #ffffff !important;
}

.wb-shape-btn.active i {
  color: #ffffff !important;
}

/* Tool Caret on Split/Popover Buttons */
.wb-tool-caret {
  font-size: 0.55rem;
  position: absolute;
  bottom: 3px;
  right: 5px;
  color: inherit;
  opacity: 0.75;
}

/* Compact Onboarding Guide Controls */
.wb-empty-close-btn {
  position: absolute;
  top: 10px;
  right: 12px;
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 0.95rem;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  transition: all 0.14s ease;
}

.wb-empty-close-btn:hover {
  background: rgba(15, 23, 42, 0.08);
  color: var(--wb-text-dark);
}

.wb-empty-reopen-btn {
  position: absolute;
  top: 12px;
  right: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--wb-toolbar-bg, #ffffff);
  border: 1px solid var(--wb-toolbar-border, #e2e8f0);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--wb-text-dark, #0f172a);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  z-index: 22;
  transition: all 0.15s ease;
}

.wb-empty-reopen-btn i {
  color: #f59e0b;
}

.wb-empty-reopen-btn:hover {
  border-color: #2563eb;
  color: #2563eb;
  transform: translateY(-1px);
}

/* Canvas Selection Mode Cursor */
#whiteboardCanvas.select-mode {
  cursor: default;
}