/* ==========================================================================
   mathwithcye — Stylesheet for KSSM Interactive Mathematics
   Subtopic 1.1: Direct Variation (Form 5 Mathematics DLP)
   ========================================================================== */

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary: #64748b;
  --secondary-light: #f1f5f9;
  --success: #10b981;
  --success-light: #ecfdf5;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --dark: #0f172a;
  --card-bg: #ffffff;
  --body-bg: #f8fafc;
  --border: #e2e8f0;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-math: "KaTeX_Math", "Cambria Math", "Latin Modern Math", "STIX Two Math", serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--body-bg);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* App Container */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 12px 16px 32px;
}

/* Header */
.app-header {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}

.brand-zone {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.logo-badge {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 28px;
  background: var(--primary-light);
  padding: 8px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.78rem;
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lesson-meta-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 9999px;
  font-weight: 600;
}

.chapter-badge {
  background: #f1f5f9;
  color: #334155;
}

.subtopic-badge {
  background: #dbeafe;
  color: #1e40af;
}

.tb-ref-badge {
  background: #fef3c7;
  color: #92400e;
}

.badge-accent {
  background: #ede9fe;
  color: #6d28d9;
}

/* User Session Bar */
.user-session-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.student-profile {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--secondary-light);
  padding: 6px 14px;
  border-radius: 9999px;
  border: 1px solid var(--border);
}

.avatar-icon {
  font-size: 16px;
}

.student-name-text {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--dark);
  display: block;
  line-height: 1.2;
}

.student-class-text {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: block;
}

.btn-text-edit {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  padding: 2px 4px;
  border-radius: 4px;
}

.btn-text-edit:hover {
  background: #e2e8f0;
}

.session-stats {
  display: flex;
  gap: 8px;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #334155;
}

.score-pill {
  background: #fefce8;
  border-color: #fef08a;
  color: #854d0e;
}

/* Lesson Progress Bar */
.progress-bar-wrapper {
  background: var(--card-bg);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 14px;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.progress-track {
  height: 8px;
  background: #e2e8f0;
  border-radius: 9999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  border-radius: 9999px;
  transition: width 0.4s ease;
}

/* Stage Navigation Tabs */
.stage-nav {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin-bottom: 18px;
}

.stage-tab {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 6px;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stage-tab:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.stage-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 6px -1px rgba(37,99,235,0.25);
}

.tab-step {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  background: rgba(0,0,0,0.06);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.stage-tab.active .tab-step {
  background: rgba(255,255,255,0.25);
  color: #ffffff;
}

.tab-label {
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* Viewport & Stages */
.lesson-viewport {
  flex: 1;
}

.lesson-stage {
  display: none;
}

.lesson-stage.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Common Card Styling */
.stage-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}

.stage-footer {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

/* Typography & Headings */
h2 {
  font-size: 1.5rem;
  color: var(--dark);
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.3;
}

h3 {
  font-size: 1.15rem;
  color: var(--dark);
  font-weight: 700;
  margin-bottom: 10px;
}

h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #334155;
  margin-bottom: 6px;
}

p {
  margin-bottom: 10px;
  color: #334155;
}

.text-muted {
  color: var(--text-muted);
}

.text-sm {
  font-size: 0.88rem;
}

.text-xs {
  font-size: 0.76rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: #f1f5f9;
  border-color: #cbd5e1;
  color: #334155;
}

.btn-secondary:hover {
  background: #e2e8f0;
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-main);
}

.btn-outline:hover {
  background: #f8fafc;
  border-color: #94a3b8;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
}

/* Forms */
.form-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: flex-end;
}

.form-group {
  flex: 1;
  min-width: 220px;
}

.form-group.align-end {
  flex: 0 0 auto;
}

label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: #475569;
  margin-bottom: 5px;
}

input[type="text"], input[type="number"] {
  width: 100%;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.92rem;
  font-family: inherit;
  transition: border-color 0.2s ease;
}

input[type="text"]:focus, input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

/* ==========================================================================
   MATHEMATICAL TYPOGRAPHY & SYMBOL DECODER STYLES
   ========================================================================== */
.math-eq {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1e3a8a;
  margin: 12px 0;
  text-align: center;
  overflow-x: auto;
  padding: 4px 8px;
}

/* Fallback pure-CSS math rendering */
.math-fallback {
  font-family: var(--font-math);
  font-style: italic;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.math-frac {
  display: inline-flex;
  flex-direction: column;
  vertical-align: middle;
  text-align: center;
  padding: 0 4px;
  font-style: normal;
}

.math-num {
  border-bottom: 1.5px solid currentColor;
  padding-bottom: 2px;
  font-size: 0.88em;
}

.math-den {
  padding-top: 2px;
  font-size: 0.88em;
}

.math-sym {
  font-style: normal;
  padding: 0 4px;
  font-weight: bold;
}

.symbol-decoder-card {
  background: #ffffff;
  border: 2px solid #3b82f6;
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 20px 0;
  box-shadow: var(--shadow-sm);
}

.decoder-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.decoder-icon {
  font-size: 24px;
  background: #eff6ff;
  padding: 6px 10px;
  border-radius: 8px;
}

.decoder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.decoder-item {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.decoder-symbol-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #e0e7ff;
  color: #3730a3;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 1.1rem;
  width: fit-content;
}

.decoder-meaning {
  font-size: 0.86rem;
  color: #1e293b;
  font-weight: 600;
}

.decoder-formula {
  font-size: 0.95rem;
  color: var(--primary);
  font-weight: 700;
  margin: 2px 0;
}

.decoder-bm {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ==========================================================================
   STAGE A: MISSION BRIEF
   ========================================================================== */
.hero-tag {
  display: inline-block;
  background: #e0e7ff;
  color: #3730a3;
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: 9999px;
  margin-bottom: 12px;
}

.hero-lead {
  font-size: 1.05rem;
  color: #475569;
  margin-bottom: 20px;
}

.profile-input-card {
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
}

.dilemma-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.dilemma-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  box-shadow: var(--shadow-sm);
}

.dilemma-icon {
  font-size: 26px;
  margin-bottom: 10px;
}

.dilemma-reveal-box {
  margin-top: 12px;
}

.reveal-content {
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--success-light);
  border-left: 4px solid var(--success);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.88rem;
}

.reveal-content.hidden {
  display: none;
}

.formula-summary-card {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.formula-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.formula-box {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.formula-box.highlight-box {
  border-color: #3b82f6;
  background: #f0f7ff;
}

.formula-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 6px;
  display: inline-block;
}

/* ==========================================================================
   STAGE B: DISCOVERY LAB
   ========================================================================== */
.lab-navigation {
  display: flex;
  gap: 8px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.lab-subtab {
  background: transparent;
  border: none;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.lab-subtab:hover {
  background: #f1f5f9;
  color: var(--dark);
}

.lab-subtab.active {
  background: #dbeafe;
  color: var(--primary);
}

.lab-content {
  display: none;
}

.lab-content.active {
  display: block;
}

.lab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 860px) {
  .lab-grid {
    grid-template-columns: 1fr;
  }
}

.lab-controls-panel {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.control-group {
  margin-bottom: 18px;
}

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

.slider-val {
  font-weight: 800;
  color: var(--primary);
  background: #eff6ff;
  padding: 2px 10px;
  border-radius: 9999px;
  font-size: 0.9rem;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
  cursor: pointer;
}

.stat-dashboard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0;
}

.dash-stat {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}

.dash-stat.highlight-stat {
  border-color: #10b981;
  background: #f0fdf4;
}

.dash-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}

.dash-stat-value {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark);
}

.lab-notice {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 0.88rem;
  margin-bottom: 16px;
}

/* Spring Visualizer */
.visualizer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spring-stage {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
  width: 100%;
  max-width: 300px;
  height: 280px;
  display: flex;
  justify-content: center;
  overflow: hidden;
}

.spring-ceiling {
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 10px;
  background: repeating-linear-gradient(45deg, #64748b, #64748b 6px, #94a3b8 6px, #94a3b8 12px);
  border-radius: 4px;
}

.ruler {
  position: absolute;
  right: 15px;
  top: 10px;
  bottom: 10px;
  width: 45px;
  border-left: 2px solid #cbd5e1;
}

.ruler-mark {
  position: absolute;
  left: 5px;
  font-size: 10px;
  color: #64748b;
  font-weight: 600;
}

.graph-box {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  width: 100%;
  max-width: 320px;
  text-align: center;
}

.graph-caption {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.data-table th, .data-table td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: center;
}

.data-table th {
  background: #f1f5f9;
  font-weight: 700;
  color: #334155;
}

.data-table tbody tr:nth-child(even) {
  background: #f8fafc;
}

/* Power Selector Buttons */
.power-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.btn-power {
  background: #ffffff;
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-power:hover {
  background: #f1f5f9;
}

.btn-power.active {
  background: #2563eb;
  border-color: #2563eb;
  color: #ffffff;
}

.view-toggle-btns {
  display: flex;
  gap: 8px;
  margin-top: 6px;
}

.btn-toggle {
  flex: 1;
  background: #ffffff;
  border: 1px solid var(--border);
  padding: 6px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.btn-toggle.active {
  background: #dbeafe;
  border-color: #3b82f6;
  color: #1e40af;
}

.discovery-callout {
  background: #fefce8;
  border-left: 4px solid #f59e0b;
  padding: 10px 14px;
  font-size: 0.84rem;
  margin-top: 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.graph-interactive-container {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cartesian-svg {
  background: #ffffff;
  border-radius: var(--radius-sm);
  max-width: 100%;
  height: auto;
}

.graph-legend-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 12px;
  font-size: 0.78rem;
}

.legend-chip {
  display: flex;
  align-items: center;
  gap: 4px;
  background: #f8fafc;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.chip-dot.blue { background: #2563eb; }
.chip-dot.green { background: #10b981; }
.chip-dot.amber { background: #f59e0b; }

/* Detective Suspect Cards */
.suspect-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.suspect-card {
  background: #ffffff;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  position: relative;
}

.suspect-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 9999px;
}

.badge-green { background: #d1fae5; color: #065f46; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-amber { background: #fef3c7; color: #92400e; }

.suspect-svg-thumb {
  text-align: center;
  margin: 12px 0;
}

.verdict-box {
  margin-top: 10px;
  font-size: 0.82rem;
  padding: 8px;
  border-radius: var(--radius-sm);
  display: none;
}

/* ==========================================================================
   STAGE C: WORKED EXAMPLES
   ========================================================================== */
.example-nav-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.pill-btn {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  color: #334155;
  padding: 8px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pill-btn:hover {
  background: #e2e8f0;
}

.pill-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.example-card {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 22px;
}

.example-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.example-source-tag {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
}

.step-flow {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 16px;
}

.step-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  position: relative;
  transition: all 0.2s ease;
}

.step-card.locked {
  opacity: 0.4;
  pointer-events: none;
}

.step-number {
  display: inline-block;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 9999px;
  margin-bottom: 6px;
}

.step-interactive-action {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.step-feedback {
  margin-top: 8px;
  font-size: 0.84rem;
  font-weight: 600;
}

/* ==========================================================================
   STAGE D & E: PRACTICE & CHALLENGE QUESTIONS
   ========================================================================== */
.practice-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}

.practice-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.question-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.q-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.q-badge.foundation { background: #e0f2fe; color: #0369a1; }
.q-badge.intermediate { background: #fef3c7; color: #92400e; }
.q-badge.advanced { background: #fce7f3; color: #9d174d; }

.q-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 14px 0;
}

.q-option-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 0.92rem;
}

.q-option-label:hover {
  background: #f1f5f9;
}

.q-option-label input[type="radio"] {
  margin-top: 4px;
}

.q-input-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 14px 0;
  flex-wrap: wrap;
}

.q-input-row input {
  max-width: 220px;
}

.q-feedback-zone {
  margin-top: 14px;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  display: none;
}

.q-feedback-zone.correct {
  display: block;
  background: var(--success-light);
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.q-feedback-zone.incorrect {
  display: block;
  background: var(--danger-light);
  border: 1px solid #fecaca;
  color: #991b1b;
}

.hint-accordion {
  margin-top: 10px;
}

.hint-box {
  background: var(--warning-light);
  border-left: 3px solid var(--warning);
  padding: 8px 12px;
  font-size: 0.82rem;
  margin-top: 6px;
  border-radius: 0 4px 4px 0;
}

.difficulty-filters {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.btn-filter {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.btn-filter.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

/* ==========================================================================
   STAGE F: EXIT TICKET & REPORT
   ========================================================================== */
.exit-ticket-box {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.report-container {
  background: #ffffff;
  border: 2px solid #cbd5e1;
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.report-container.hidden {
  display: none;
}

.report-header-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--primary);
  padding-bottom: 14px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.report-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
}

.report-timestamp {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.report-details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.report-item {
  background: #f8fafc;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.report-label {
  display: block;
  font-size: 0.74rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
}

.report-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
}

.report-score-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}

@media (max-width: 600px) {
  .report-score-cards {
    grid-template-columns: 1fr;
  }
}

.report-score-card {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}

.sc-title {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  color: #166534;
  text-transform: uppercase;
}

.sc-number {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: #15803d;
  margin-top: 4px;
}

.report-summary-notes {
  background: #f8fafc;
  border-left: 4px solid var(--primary);
  padding: 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 24px;
}

.report-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* Footer */
.app-footer {
  margin-top: 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.mt-3 { margin-top: 14px; }

/* Responsive adjustments */
@media (max-width: 768px) {
  .stage-nav {
    grid-template-columns: repeat(3, 1fr);
  }
  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .stage-nav {
    grid-template-columns: repeat(2, 1fr);
  }
  .dilemma-grid {
    grid-template-columns: 1fr;
  }
}

/* Print CSS */
@media print {
  body {
    background: #ffffff;
    color: #000000;
  }
  .app-header, .stage-nav, .progress-bar-wrapper, .stage-footer, .no-print, .lab-navigation, .app-footer {
    display: none !important;
  }
  .app-container {
    padding: 0;
    max-width: 100%;
  }
  .stage-card {
    border: none;
    box-shadow: none;
    padding: 0;
  }
  .lesson-stage {
    display: none !important;
  }
  #stageF {
    display: block !important;
  }
  .report-container {
    display: block !important;
    border: 1px solid #000;
    padding: 20px;
  }
}


/* ==========================================================================
   CLASSROOM TEACHING PRESENTER TOOLBAR (授課教具列)
   Laser Pointer (Fading Trail), Pen (5 Colors), Eraser, Clear, Magnifier
   ========================================================================== */

.teaching-layer {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

#drawingCanvas, #laserCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Tool cursor interaction states */
.teaching-layer.mode-pen #drawingCanvas {
  pointer-events: auto;
  cursor: crosshair;
}

.teaching-layer.mode-eraser #drawingCanvas {
  pointer-events: auto;
  cursor: cell;
}

.teaching-layer.mode-laser #laserCanvas {
  pointer-events: auto;
  cursor: crosshair;
}

/* In magnify mode, the overlay layer MUST stay pointer-events: none so clicks reach the page! */
.teaching-layer.mode-magnify {
  pointer-events: none;
}

body.mode-magnify,
body.mode-magnify * {
  cursor: zoom-in !important;
}

/* Magnifier hover highlight on interactive elements */
body.mode-magnify .stage-card,
body.mode-magnify .formula-box,
body.mode-magnify .graph-box,
body.mode-magnify .spring-stage,
body.mode-magnify .practice-card,
body.mode-magnify .example-card,
body.mode-magnify .symbol-decoder-card,
body.mode-magnify .dilemma-card,
body.mode-magnify .table-card,
body.mode-magnify .graph-interactive-container {
  transition: outline 0.15s ease, box-shadow 0.15s ease;
}

body.mode-magnify .stage-card:hover,
body.mode-magnify .formula-box:hover,
body.mode-magnify .graph-box:hover,
body.mode-magnify .spring-stage:hover,
body.mode-magnify .practice-card:hover,
body.mode-magnify .example-card:hover,
body.mode-magnify .symbol-decoder-card:hover,
body.mode-magnify .dilemma-card:hover,
body.mode-magnify .table-card:hover,
body.mode-magnify .graph-interactive-container:hover {
  outline: 3px dashed #2563eb !important;
  outline-offset: 4px;
  box-shadow: 0 0 16px rgba(37, 99, 235, 0.35) !important;
}

/* Floating Toast Notification */
.tool-toast-notification {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.95);
  color: #ffffff;
  padding: 10px 22px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.88rem;
  font-weight: 700;
  box-shadow: 0 10px 25px rgba(0,0,0,0.35);
  z-index: 10005;
  pointer-events: none;
  animation: toastFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-toast-notification.hidden {
  display: none;
}

@keyframes toastFadeIn {
  from { opacity: 0; transform: translate(-50%, -12px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* Floating Toolbar Dock */
/* --------------------------------------------------------------------------
   13. CLASSROOM PRESENTER TOOLBAR (ENGLISH)
   -------------------------------------------------------------------------- */
.teaching-toolbar {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9995; /* Top-most floating toolbar */
  background-color: #1e1b4b;
  color: #ffffff;
  border: 1px solid #4338ca;
  border-radius: var(--radius-lg, 16px);
  padding: 0.6rem 0.85rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(99, 102, 241, 0.2);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  user-select: none;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.teaching-toolbar.collapsed .toolbar-tools {
  display: none;
}

.toolbar-drag-handle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  cursor: grab;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.toolbar-drag-dots {
  color: #818cf8;
  font-size: 0.9rem;
}

.toolbar-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #c7d2fe;
}

.btn-toolbar-minimize {
  background: transparent;
  border: none;
  color: #c7d2fe;
  cursor: pointer;
  font-size: 0.75rem;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm, 6px);
}

.btn-toolbar-minimize:hover {
  background-color: rgba(255, 255, 255, 0.15);
}

.toolbar-tools {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tool-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md, 10px);
  color: #ffffff;
  cursor: pointer;
  transition: var(--transition-fast, 0.15s ease);
  padding: 0.2rem;
}

.tool-btn:hover {
  background-color: rgba(99, 102, 241, 0.35);
  border-color: #818cf8;
}

.tool-btn.active {
  background-color: #4f46e5;
  border-color: #a5b4fc;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.6);
}

.tool-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.tool-name {
  font-size: 0.65rem;
  font-weight: 600;
  margin-top: 0.2rem;
  color: #e0e7ff;
}

.tool-btn-action:hover, .btn-danger-action:hover {
  background-color: rgba(239, 68, 68, 0.4);
  border-color: #ef4444;
}

/* Pen Wrapper & Palette */
.tool-pen-wrapper {
  position: relative;
}

.color-palette-bar {
  display: none;
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #1e1b4b;
  border: 1px solid #4338ca;
  border-radius: var(--radius-full, 9999px);
  padding: 0.35rem 0.65rem;
  box-shadow: var(--shadow-lg, 0 10px 15px -3px rgba(0,0,0,0.2));
  align-items: center;
  gap: 0.4rem;
  z-index: 9998;
}

.tool-pen-wrapper:hover .color-palette-bar,
.tool-btn#btnToolPen.active ~ .color-palette-bar {
  display: flex;
}

.color-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.color-dot:hover {
  transform: scale(1.2);
}

.color-dot.active {
  border-color: #ffffff;
  box-shadow: 0 0 6px #ffffff;
}

.palette-divider, .toolbar-divider {
  width: 1px;
  height: 16px;
  background-color: rgba(255, 255, 255, 0.2);
}

.stroke-btn, .pen-size-toggle {
  background-color: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  border-radius: var(--radius-sm, 6px);
  padding: 0.15rem 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   14. TEACHING CANVAS LAYER (ON TOP OF ZOOM MODAL FOR ACTIVE TEACHING)
   -------------------------------------------------------------------------- */
.teaching-layer {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9980; /* Sits ON TOP of .zoom-modal (9960) so drawing works in zoom view! */
  pointer-events: none;
}

.teaching-layer canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

#drawingCanvas {
  z-index: 9981;
}

#laserCanvas {
  z-index: 9982;
  pointer-events: none;
}

.teaching-layer.mode-cursor {
  pointer-events: none;
}

.teaching-layer.mode-laser {
  pointer-events: auto;
  cursor: crosshair;
}

.teaching-layer.mode-pen {
  pointer-events: auto;
  cursor: crosshair;
}

.teaching-layer.mode-eraser {
  pointer-events: auto;
  cursor: cell;
}

.teaching-layer.mode-magnify {
  pointer-events: none;
}

body.tool-active-magnify {
  cursor: zoom-in !important;
}

body.tool-active-magnify .stage-card,
body.tool-active-magnify .example-container,
body.tool-active-magnify .question-card,
body.tool-active-magnify .graph-box,
body.tool-active-magnify .simulation-box,
body.tool-active-magnify .dilemma-card {
  outline: 2px dashed #4f46e5;
  outline-offset: 4px;
  cursor: zoom-in !important;
  transition: transform 0.15s ease, outline-color 0.15s ease;
}

body.tool-active-magnify .stage-card:hover,
body.tool-active-magnify .example-container:hover,
body.tool-active-magnify .question-card:hover,
body.tool-active-magnify .graph-box:hover,
body.tool-active-magnify .simulation-box:hover,
body.tool-active-magnify .dilemma-card:hover {
  outline-color: #ef4444;
  outline-width: 3px;
  transform: scale(1.008);
}

/* --------------------------------------------------------------------------
   15. ADVANCED ZOOM SPOTLIGHT (PROPORTIONAL SCALING, DRAG-TO-PAN & TOOLBAR)
   -------------------------------------------------------------------------- */
.zoom-modal {
  position: fixed;
  inset: 0;
  z-index: 9960; /* Lower than teaching-layer (9980) and toolbar (9995) */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.zoom-modal.hidden {
  display: none !important;
}

.zoom-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.zoom-dialog {
  position: relative;
  z-index: 9965;
  background-color: var(--color-bg-card, #ffffff);
  border: 2px solid var(--color-primary, #4f46e5);
  border-radius: var(--radius-lg, 16px);
  max-width: 96vw;
  width: 1060px;
  height: 86vh;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(99, 102, 241, 0.3);
  overflow: hidden;
  animation: zoomPop 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes zoomPop {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.zoom-dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 1.25rem;
  background-color: #1e1b4b;
  color: #ffffff;
  border-bottom: 1px solid #4338ca;
  flex-wrap: wrap;
  gap: 0.65rem;
  z-index: 10;
}

.zoom-header-left {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.zoom-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #e0e7ff;
}

.zoom-hint-badge {
  font-size: 0.72rem;
  font-weight: 600;
  background-color: rgba(99, 102, 241, 0.3);
  color: #c7d2fe;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  border: 1px solid rgba(129, 140, 248, 0.35);
  letter-spacing: 0.02em;
}

/* Modal Mini Teaching Tools */
.modal-teaching-tools {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background-color: rgba(255, 255, 255, 0.08);
  padding: 0.2rem 0.4rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.modal-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.55rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  color: #e0e7ff;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.modal-tool-btn:hover {
  background-color: rgba(99, 102, 241, 0.35);
}

.modal-tool-btn.active {
  background-color: #4f46e5;
  border-color: #818cf8;
  color: #ffffff;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.6);
}

.modal-tool-btn.btn-clear-ink:hover {
  background-color: rgba(239, 68, 68, 0.4);
}

/* Zoom Controls */
.zoom-controls {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.btn-zoom-ctrl {
  background-color: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  border-radius: 6px;
  padding: 0.25rem 0.6rem;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.btn-zoom-ctrl:hover {
  background-color: #4f46e5;
}

#zoomLevelDisplay {
  font-size: 0.85rem;
  font-weight: 800;
  min-width: 50px;
  text-align: center;
  color: #a5b4fc;
}

.btn-zoom-close {
  background-color: #ef4444;
  border: none;
  color: #fff;
  border-radius: 6px;
  padding: 0.25rem 0.65rem;
  font-weight: 800;
  font-size: 1rem;
  cursor: pointer;
  margin-left: 0.4rem;
  transition: background-color 0.15s ease;
}

.btn-zoom-close:hover {
  background-color: #dc2626;
}

/* Zoom Dialog Body with Drag-to-Pan */
.zoom-dialog-body {
  position: relative;
  flex: 1;
  padding: 2.5rem;
  overflow: hidden;
  background-color: var(--color-bg-base, #f8fafc);
  cursor: grab;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.zoom-dialog-body.is-panning {
  cursor: grabbing !important;
  user-select: none;
}

/* Proportional Vector Zoom Container */
.zoom-target-container {
  transform-origin: 0 0;
  width: 100%;
  transition: transform 0.04s ease-out;
  will-change: transform;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

.zoom-target-container svg {
  shape-rendering: geometricPrecision;
}

.zoom-target-container .katex {
  text-rendering: geometricPrecision;
}

.zoom-dialog-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1.25rem;
  background-color: var(--color-surface-sunken, #f1f5f9);
  border-top: 1px solid var(--color-border-subtle, #e2e8f0);
  font-size: 0.8rem;
  color: var(--color-text-muted, #64748b);
  z-index: 10;
}

.zoom-footer-right kbd {
  background-color: rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
  font-size: 0.75rem;
  font-family: inherit;
  font-weight: 700;
}

@media print {
  body {
    background: #ffffff;
    color: #000000;
  }
  .app-header, .stage-nav, .progress-bar-wrapper, .stage-footer, .no-print, .lab-navigation, .app-footer {
    display: none !important;
  }
  .app-container {
    padding: 0;
    max-width: 100%;
  }
  .stage-card {
    border: none;
    box-shadow: none;
    padding: 0;
  }
  .lesson-stage {
    display: none !important;
  }
  #stageF {
    display: block !important;
  }
  .report-container {
    display: block !important;
    border: 1px solid #000;
    padding: 20px;
  }
}


/* ==========================================================================
   CLASSROOM TEACHING PRESENTER TOOLBAR (授課教具列)
   Laser Pointer (Fading Trail), Pen (5 Colors), Eraser, Clear, Magnifier
   ========================================================================== */

.teaching-layer {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

#drawingCanvas, #laserCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Tool cursor interaction states */
.teaching-layer.mode-pen #drawingCanvas {
  pointer-events: auto;
  cursor: crosshair;
}

.teaching-layer.mode-eraser #drawingCanvas {
  pointer-events: auto;
  cursor: cell;
}

.teaching-layer.mode-laser #laserCanvas {
  pointer-events: auto;
  cursor: crosshair;
}

/* In magnify mode, the overlay layer MUST stay pointer-events: none so clicks reach the page! */
.teaching-layer.mode-magnify {
  pointer-events: none;
}

body.mode-magnify,
body.mode-magnify * {
  cursor: zoom-in !important;
}

/* Magnifier hover highlight on interactive elements */
body.mode-magnify .stage-card,
body.mode-magnify .formula-box,
body.mode-magnify .graph-box,
body.mode-magnify .spring-stage,
body.mode-magnify .practice-card,
body.mode-magnify .example-card,
body.mode-magnify .symbol-decoder-card,
body.mode-magnify .dilemma-card,
body.mode-magnify .table-card,
body.mode-magnify .graph-interactive-container {
  transition: outline 0.15s ease, box-shadow 0.15s ease;
}

body.mode-magnify .stage-card:hover,
body.mode-magnify .formula-box:hover,
body.mode-magnify .graph-box:hover,
body.mode-magnify .spring-stage:hover,
body.mode-magnify .practice-card:hover,
body.mode-magnify .example-card:hover,
body.mode-magnify .symbol-decoder-card:hover,
body.mode-magnify .dilemma-card:hover,
body.mode-magnify .table-card:hover,
body.mode-magnify .graph-interactive-container:hover {
  outline: 3px dashed #2563eb !important;
  outline-offset: 4px;
  box-shadow: 0 0 16px rgba(37, 99, 235, 0.35) !important;
}

/* Floating Toast Notification */
.tool-toast-notification {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.95);
  color: #ffffff;
  padding: 10px 22px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.88rem;
  font-weight: 700;
  box-shadow: 0 10px 25px rgba(0,0,0,0.35);
  z-index: 10005;
  pointer-events: none;
  animation: toastFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-toast-notification.hidden {
  display: none;
}

@keyframes toastFadeIn {
  from { opacity: 0; transform: translate(-50%, -12px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* Floating Toolbar Dock */
.teaching-toolbar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  padding: 8px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35), 0 4px 10px rgba(0, 0, 0, 0.2);
  pointer-events: auto;
  z-index: 10001;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}

.teaching-toolbar.minimized {
  transform: translateX(-50%) translateY(140%);
  opacity: 0;
  pointer-events: none;
}

.toolbar-drag-handle {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #94a3b8;
  font-size: 0.74rem;
  font-weight: 700;
  padding-right: 8px;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
}

.toolbar-drag-dots {
  letter-spacing: -2px;
  font-size: 14px;
  cursor: grab;
}

.btn-toolbar-minimize {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 10px;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  margin-left: 4px;
}

.btn-toolbar-minimize:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.toolbar-tools {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tool-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 6px 10px;
  color: #f1f5f9;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: all 0.18s ease;
  min-width: 52px;
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}

.tool-btn.active {
  background: #2563eb;
  border-color: #60a5fa;
  color: #ffffff;
  box-shadow: 0 0 14px rgba(37, 99, 235, 0.65);
}

.tool-icon {
  font-size: 16px;
  line-height: 1;
}

.tool-name {
  font-size: 0.68rem;
  font-weight: 700;
  white-space: nowrap;
}

.laser-dot-icon {
  animation: pulseLaser 1.5s infinite;
}

@keyframes pulseLaser {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 2px #ef4444); }
  50% { transform: scale(1.15); filter: drop-shadow(0 0 6px #ef4444); }
}

/* Pen Wrapper & Color Palette */
.tool-pen-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.color-palette-bar {
  display: none;
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 9999px;
  padding: 6px 10px;
  gap: 8px;
  align-items: center;
  box-shadow: 0 8px 20px rgba(0,0,0,0.4);
}

.tool-pen-wrapper:hover .color-palette-bar,
.tool-pen-wrapper.palette-open .color-palette-bar {
  display: flex;
}

.color-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.color-dot:hover {
  transform: scale(1.2);
}

.color-dot.active {
  border-color: #ffffff;
  transform: scale(1.25);
  box-shadow: 0 0 8px currentColor;
}

.pen-size-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  cursor: pointer;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  margin-left: 2px;
}

.size-dot {
  width: 4px;
  height: 4px;
  background: #ffffff;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.size-dot.bold {
  width: 9px;
  height: 9px;
}

.toolbar-divider {
  width: 1px;
  height: 30px;
  background: rgba(255, 255, 255, 0.14);
  margin: 0 4px;
}

.btn-danger-action:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: #ef4444;
}

/* Expand pill button */
.toolbar-expand-pill {
  position: fixed;
  bottom: 20px;
  right: 24px;
  background: var(--dark);
  color: #ffffff;
  border: 1px solid rgba(255,255,255,0.2);
  padding: 8px 16px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  pointer-events: auto;
  z-index: 10001;
  transition: all 0.2s ease;
}

.toolbar-expand-pill:hover {
  background: var(--primary);
  transform: translateY(-2px);
}

.toolbar-expand-pill.hidden {
  display: none;
}

/* Magnifier Loupe Lens */
.magnifier-loupe {
  position: fixed;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 3px solid #2563eb;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35), inset 0 0 16px rgba(0, 0, 0, 0.15);
  pointer-events: none;
  overflow: hidden;
  z-index: 10000;
  transform: translate(-50%, -50%);
  background: #ffffff;
  display: none;
}

.magnifier-loupe.active {
  display: block;
}

.loupe-crosshair {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.loupe-crosshair::before, .loupe-crosshair::after {
  content: "";
  position: absolute;
  background: rgba(37, 99, 235, 0.5);
}

.loupe-crosshair::before {
  top: 7px;
  left: 0;
  right: 0;
  height: 2px;
}

.loupe-crosshair::after {
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
}

/* Zoom Spotlight Modal (Click-to-Magnify) */
.zoom-modal {
  position: fixed;
  inset: 0;
  z-index: 10002;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
}

.zoom-modal.hidden {
  display: none;
}

.zoom-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(10px);
}

.zoom-dialog {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  width: 90%;
  max-width: 900px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 1;
  animation: zoomDialogIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes zoomDialogIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.zoom-dialog-header {
  background: #f8fafc;
  border-bottom: 1px solid var(--border);
  padding: 12px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.zoom-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--dark);
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-zoom-ctrl {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-zoom-ctrl:hover {
  background: #f1f5f9;
}

#zoomLevelDisplay {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--primary);
  min-width: 44px;
  text-align: center;
}

.btn-zoom-close {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 800;
  margin-left: 6px;
}

.btn-zoom-close:hover {
  background: #f87171;
  color: #ffffff;
}

.zoom-dialog-body {
  padding: 24px;
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 240px;
}

.zoom-dialog-body > * {
  transform-origin: top center;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Hover hint when in magnify mode */
.teaching-layer.mode-magnify .stage-card *:hover {
  outline: 2px dashed #2563eb;
  cursor: zoom-in;
}

/* Responsive adjustment for toolbar on small screens */
@media (max-width: 768px) {
  .teaching-toolbar {
    bottom: 12px;
    padding: 6px 10px;
    gap: 6px;
    max-width: 96vw;
    overflow-x: auto;
  }
  .tool-btn {
    min-width: 44px;
    padding: 4px 6px;
  }
  .tool-name {
    font-size: 0.62rem;
  }
}

/* ========================================================================== */
/* WIRELESS REMOTE CONTROLLER & WEBRTC SYNC ENGINE STYLES (METHOD 3)          */
/* ========================================================================== */

/* Toolbar Remote Button & Connected Badge */
.btn-remote-ctrl {
  position: relative;
}

.remote-badge-dot {
  position: absolute;
  top: 4px;
  right: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #64748b;
  transition: all 0.3s ease;
}

.remote-badge-dot.connected {
  background: #10b981;
  box-shadow: 0 0 8px #10b981, 0 0 14px rgba(16, 185, 129, 0.6);
  animation: remotePulse 2s infinite ease-in-out;
}

@keyframes remotePulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

/* Remote Pairing Modal (Host Screen) */
.remote-pair-modal {
  position: fixed;
  inset: 0;
  z-index: 10010;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  pointer-events: auto !important;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.remote-pair-modal.hidden {
  display: none !important;
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.remote-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.78);
  backdrop-filter: blur(8px);
  z-index: 1;
  pointer-events: auto !important;
  cursor: pointer;
}

.remote-modal-card {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 580px;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 20px;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
  color: #f8fafc;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  pointer-events: auto !important;
}

.remote-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: #0f172a;
  border-bottom: 1px solid #334155;
}

.remote-header-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.remote-header-icon {
  font-size: 1.8rem;
  background: #1e293b;
  padding: 6px 10px;
  border-radius: 12px;
  border: 1px solid #334155;
}

.remote-modal-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 750;
  color: #ffffff;
}

.remote-modal-desc {
  margin: 2px 0 0;
  font-size: 0.8rem;
  color: #94a3b8;
}

.btn-remote-close {
  position: relative;
  z-index: 10;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #f8fafc;
  font-size: 1.4rem;
  cursor: pointer !important;
  pointer-events: auto !important;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.btn-remote-close:hover,
.btn-remote-close:active {
  background: #dc2626 !important;
  border-color: #ef4444 !important;
  color: #ffffff !important;
  transform: scale(1.08);
}

.btn-modal-done {
  background: #2563eb;
  color: #ffffff;
  border: 1px solid #60a5fa;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer !important;
  pointer-events: auto !important;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-modal-done:hover,
.btn-modal-done:active {
  background: #1d4ed8;
  transform: scale(1.03);
}

.remote-modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.remote-qr-section {
  display: flex;
  gap: 24px;
  align-items: center;
  background: #0f172a;
  padding: 18px;
  border-radius: 16px;
  border: 1px solid #334155;
}

@media (max-width: 600px) {
  .remote-qr-section {
    flex-direction: column;
    text-align: center;
  }
}

.qrcode-wrapper {
  background: #ffffff;
  padding: 12px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  min-width: 170px;
  min-height: 170px;
}

.qrcode-wrapper img,
.qrcode-wrapper canvas {
  display: block;
  max-width: 100%;
}

.remote-qr-details {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.qr-step-chip {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #2563eb;
  color: #ffffff;
  padding: 3px 10px;
  border-radius: 999px;
}

.qr-instruction-text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.45;
  color: #cbd5e1;
}

.room-code-tag {
  font-size: 0.95rem;
  color: #94a3b8;
  background: #1e293b;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid #334155;
  display: inline-block;
}

.room-code-tag strong {
  color: #38bdf8;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  font-family: monospace;
}

.remote-url-copy-box {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.remote-url-copy-box input {
  flex: 1;
  min-width: 120px;
  background: #1e293b;
  border: 1px solid #334155;
  color: #94a3b8;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.76rem;
  font-family: monospace;
}

.btn-copy-remote-url,
.btn-test-remote-tab {
  background: #334155;
  color: #f8fafc;
  border: none;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-copy-remote-url:hover,
.btn-test-remote-tab:hover {
  background: #2563eb;
  color: #ffffff;
}

.remote-status-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #0f172a;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid #334155;
}

.remote-status-pulse {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.remote-status-pulse.waiting {
  background: #f59e0b;
  box-shadow: 0 0 10px #f59e0b;
  animation: remotePulse 1.6s infinite ease-in-out;
}

.remote-status-pulse.connected {
  background: #10b981;
  box-shadow: 0 0 12px #10b981;
  animation: remotePulse 2s infinite ease-in-out;
}

.remote-status-msg {
  font-size: 0.88rem;
  font-weight: 600;
  color: #e2e8f0;
}

.remote-modal-footer {
  padding: 14px 24px;
  background: #0f172a;
  border-top: 1px solid #334155;
}

.footer-tip {
  font-size: 0.78rem;
  color: #94a3b8;
  line-height: 1.4;
}

/* ========================================================================== */
/* DEDICATED TEACHER MOBILE REMOTE CONTROLLER UI (TABLET VIEW)                */
/* ========================================================================== */
.teacher-remote-view {
  position: fixed;
  inset: 0;
  z-index: 100000;
  background: #090d16;
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

.teacher-remote-view.hidden {
  display: none !important;
}

.remote-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: #0f172a;
  border-bottom: 1px solid #1e293b;
  height: 54px;
  flex-shrink: 0;
}

.remote-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.remote-brand-icon {
  font-size: 1.4rem;
}

.remote-brand-name {
  font-size: 0.95rem;
  font-weight: 750;
  color: #ffffff;
  display: block;
}

.remote-stage-pill {
  font-size: 0.72rem;
  color: #38bdf8;
  font-weight: 600;
}

.remote-conn-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #1e293b;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid #334155;
}

.remote-conn-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #f59e0b;
}

.remote-conn-dot.connected {
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.remote-workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 8px;
  gap: 8px;
}

/* Tool Selection Strip */
.remote-tool-strip {
  display: flex;
  gap: 6px;
  background: #0f172a;
  padding: 6px;
  border-radius: 14px;
  border: 1px solid #1e293b;
  overflow-x: auto;
  flex-shrink: 0;
}

.remote-tool-btn {
  flex: 1;
  min-width: 52px;
  min-height: 48px;
  background: #1e293b;
  color: #94a3b8;
  border: 1px solid #334155;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.remote-tool-btn:active {
  transform: scale(0.96);
}

.remote-tool-btn.active {
  background: #2563eb;
  color: #ffffff;
  border-color: #60a5fa;
  box-shadow: 0 0 12px rgba(37, 99, 235, 0.5);
}

.remote-tool-btn.btn-danger-remote:active {
  background: #dc2626;
  color: #ffffff;
}

.remote-tool-btn.btn-zoom-remote.active {
  background: #7c3aed;
  border-color: #a78bfa;
}

.r-icon {
  font-size: 1.15rem;
}

.r-label {
  font-size: 0.68rem;
  font-weight: 700;
}

/* Pen Palette Bar */
.remote-pen-palette {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #0f172a;
  padding: 6px 14px;
  border-radius: 12px;
  border: 1px solid #1e293b;
  flex-shrink: 0;
}

.remote-pen-palette.hidden {
  display: none;
}

.remote-colors {
  display: flex;
  gap: 12px;
  align-items: center;
}

.r-color-dot {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all 0.15s ease;
}

.r-color-dot.active {
  transform: scale(1.22);
  border-color: #ffffff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.6);
}

.remote-width-toggle {
  display: flex;
  gap: 6px;
}

.r-width-btn {
  background: #1e293b;
  color: #94a3b8;
  border: 1px solid #334155;
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
}

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

/* Interactive Touch / Stylus Pad */
.remote-pad-container {
  flex: 1;
  position: relative;
  background: #0d131f;
  border: 2px solid #1e293b;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: inset 0 2px 12px rgba(0, 0, 0, 0.6);
}

.remote-pad-badge {
  position: absolute;
  top: 10px;
  left: 12px;
  z-index: 5;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(4px);
  color: #94a3b8;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.remote-pad-canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

/* Stage Navigation Strip */
.remote-stage-switcher {
  background: #0f172a;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid #1e293b;
  flex-shrink: 0;
}

.remote-stage-title {
  font-size: 0.68rem;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

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

@media (max-width: 600px) {
  .remote-stage-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.r-stage-btn {
  background: #1e293b;
  color: #94a3b8;
  border: 1px solid #334155;
  border-radius: 8px;
  padding: 8px 4px;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
}

.r-stage-btn:active {
  transform: scale(0.96);
}

.r-stage-btn.active {
  background: #059669;
  color: #ffffff;
  border-color: #34d399;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

/* Remote Zoom Bar */
.remote-zoom-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #0f172a;
  padding: 6px 12px;
  border-radius: 12px;
  border: 1px solid #1e293b;
  flex-shrink: 0;
}

.r-zoom-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: #94a3b8;
  margin-right: auto;
}

.r-zoom-btn {
  background: #1e293b;
  color: #f8fafc;
  border: 1px solid #334155;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
}

.r-zoom-btn:active {
  transform: scale(0.95);
}

.r-zoom-btn.btn-danger-sm {
  background: #7f1d1d;
  border-color: #dc2626;
  color: #fecaca;
}