/* ===================================================================
   premium-quiz-styles.css — Enhanced Interactive Quiz Mode
   Standalone styles. Does NOT modify shared assets or ai-context styles.
   =================================================================== */

/* ─── Root Variables (matches app theme) ──────────────────────── */
:root {
  --pq-accent: #7c3aed;
  --pq-accent-hover: #6d28d9;
  --pq-accent-light: #ede9fe;
  --pq-accent-glow: rgba(124, 58, 237, 0.2);
  --pq-correct: #16a34a;
  --pq-correct-bg: #dcfce7;
  --pq-correct-border: #86efac;
  --pq-incorrect: #dc2626;
  --pq-incorrect-bg: #fee2e2;
  --pq-incorrect-border: #fca5a5;
  --pq-warning: #f59e0b;
  --pq-text: #1e293b;
  --pq-text-mid: #64748b;
  --pq-text-light: #94a3b8;
  --pq-bg: #ffffff;
  --pq-bg-subtle: #f8fafc;
  --pq-bg-card: #ffffff;
  --pq-divider: #e2e8f0;
  --pq-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --pq-shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.12);
  --pq-radius: 12px;
  --pq-radius-sm: 8px;
  --pq-font: 'Source Sans 3', 'Segoe UI', sans-serif;
  --pq-font-heading: 'Orbitron', sans-serif;
  --pq-font-mono: 'Source Code Pro', monospace;
}

/* ─── Modal Backdrop ─────────────────────────────────────────── */
.pq-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  z-index: 20000;
  justify-content: center;
  align-items: center;
  animation: pqFadeIn 0.2s ease-out;
}
.pq-overlay.open {
  display: flex;
}
@keyframes pqFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ─── Modal Container ────────────────────────────────────────── */
.pq-modal {
  background: var(--pq-bg);
  border-radius: var(--pq-radius);
  width: 96vw;
  max-width: 1280px;
  height: 90vh;
  max-height: 800px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--pq-shadow-lg);
  animation: pqSlideUp 0.25s ease-out;
  overflow: hidden;
  position: relative;
}
@keyframes pqSlideUp {
  from { opacity: 0; transform: translateY(24px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ─── Header Bar ─────────────────────────────────────────────── */
.pq-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--pq-divider);
  flex-shrink: 0;
  background: var(--pq-bg);
}
.pq-header-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, #7c3aed, #a78bfa);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: #fff; flex-shrink: 0;
}
.pq-header-title {
  font-family: var(--pq-font-heading);
  font-size: 13px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--pq-text);
}
.pq-header-sub {
  font-size: 12px; color: var(--pq-text-mid);
  margin-left: 4px;
}
.pq-header-progress {
  margin-left: auto;
  display: flex; align-items: center; gap: 12px;
  font-size: 12px; color: var(--pq-text-mid);
}
.pq-header-counter {
  font-weight: 700; color: var(--pq-text);
  font-size: 13px;
}
.pq-header-timer {
  font-family: var(--pq-font-mono);
  font-size: 14px; font-weight: 700;
  color: var(--pq-text);
  padding: 4px 12px;
  background: var(--pq-bg-subtle);
  border-radius: 6px;
  border: 1px solid var(--pq-divider);
}
.pq-header-timer.warning {
  color: var(--pq-incorrect);
  border-color: var(--pq-incorrect);
  background: var(--pq-incorrect-bg);
  animation: pqPulse 1s infinite;
}
@keyframes pqPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.pq-header-close {
  width: 30px; height: 30px;
  background: var(--pq-bg-subtle);
  border: none; border-radius: 8px;
  font-size: 18px; color: var(--pq-text-mid);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.15s;
}
.pq-header-close:hover {
  background: var(--pq-divider);
  color: var(--pq-text);
}

/* ─── Split-Pane Body ────────────────────────────────────────── */
.pq-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

/* ─── Left Panel: Exhibit ────────────────────────────────────── */
.pq-exhibit-panel {
  width: 45%;
  min-width: 320px;
  border-right: 1px solid var(--pq-divider);
  display: flex;
  flex-direction: column;
  background: var(--pq-bg-subtle);
  overflow: hidden;
}
.pq-exhibit-header {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--pq-divider);
  flex-shrink: 0;
  background: var(--pq-bg);
}
.pq-exhibit-badge {
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: var(--pq-accent);
  background: var(--pq-accent-light);
  padding: 2px 8px; border-radius: 4px;
}
.pq-exhibit-title {
  font-size: 13px; font-weight: 600; color: var(--pq-text);
  flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.pq-exhibit-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}
.pq-exhibit-scroll p {
  font-size: 14px; line-height: 1.7; color: var(--pq-text);
  margin: 0 0 12px;
}
.pq-exhibit-scroll ul {
  margin: 0 0 12px; padding-left: 20px;
}
.pq-exhibit-scroll li {
  font-size: 14px; line-height: 1.6; color: var(--pq-text);
  margin-bottom: 4px;
}
.pq-exhibit-scroll strong {
  color: var(--pq-text);
}

/* Exhibit table styling */
.pq-exhibit-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 8px 0 16px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.pq-exhibit-table thead {
  background: linear-gradient(135deg, #7c3aed, #6d28d9);
  color: #fff;
}
.pq-exhibit-table th {
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.pq-exhibit-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--pq-divider);
  color: var(--pq-text);
}
.pq-exhibit-table tbody tr:nth-child(even) {
  background: var(--pq-bg-subtle);
}
.pq-exhibit-table tbody tr:hover {
  background: var(--pq-accent-light);
}
.pq-exhibit-table tbody tr:last-child td {
  border-bottom: none;
}

/* Exhibit SVG plan */
.pq-exhibit-plan {
  background: var(--pq-bg);
  border-radius: var(--pq-radius-sm);
  padding: 12px;
  border: 1px solid var(--pq-divider);
  margin-bottom: 12px;
}
.pq-exhibit-plan svg {
  display: block;
  margin: 0 auto;
}

/* Exhibit brief card */
.pq-exhibit-brief {
  background: var(--pq-bg);
  border-radius: var(--pq-radius-sm);
  padding: 16px 20px;
  border: 1px solid var(--pq-divider);
  border-left: 4px solid var(--pq-accent);
  margin-bottom: 12px;
}
.pq-exhibit-brief p {
  margin: 0 0 8px !important;
}
.pq-exhibit-brief ul {
  margin: 4px 0 8px !important;
}

/* ─── Right Panel: Quiz Form ─────────────────────────────────── */
.pq-quiz-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--pq-bg);
}
.pq-quiz-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 28px 32px;
}

/* Question topic/difficulty meta */
.pq-quiz-meta {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.pq-meta-section {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--pq-accent);
  background: var(--pq-accent-light);
  padding: 3px 10px; border-radius: 4px;
}
.pq-meta-topic {
  font-size: 12px; color: var(--pq-text-mid);
}
.pq-meta-difficulty {
  font-size: 11px; font-weight: 600;
  padding: 2px 10px; border-radius: 4px;
  margin-left: auto;
}
.pq-meta-difficulty.easy {
  background: #dcfce7; color: #16a34a;
}
.pq-meta-difficulty.moderate {
  background: #fef9c3; color: #ca8a04;
}
.pq-meta-difficulty.hard {
  background: #fee2e2; color: #dc2626;
}

/* Question text */
.pq-question-text {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--pq-text);
  margin: 0 0 24px;
  padding: 0 0 20px;
  border-bottom: 2px solid var(--pq-divider);
}

/* ─── Options ────────────────────────────────────────────────── */
.pq-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.pq-option {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  background: var(--pq-bg-subtle);
  border: 2px solid var(--pq-divider);
  border-radius: var(--pq-radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  touch-action: manipulation;
  font-family: var(--pq-font);
  width: 100%;
  text-align: left;
  font-size: 14px;
  color: var(--pq-text);
  line-height: 1.5;
}
.pq-option:hover:not(.pq-option-locked) {
  border-color: var(--pq-accent);
  background: var(--pq-accent-light);
  transform: translateX(4px);
}
.pq-option .pq-opt-letter {
  display: flex; align-items: center; justify-content: center;
  width: 28px; height: 28px;
  border-radius: 6px;
  background: var(--pq-bg);
  border: 1px solid var(--pq-divider);
  font-weight: 700; font-size: 13px;
  flex-shrink: 0;
  transition: all 0.15s;
  color: var(--pq-text-mid);
}
.pq-option .pq-opt-text {
  flex: 1;
  padding-top: 2px;
}

/* States */
.pq-option.pq-option-selected {
  border-color: var(--pq-accent);
  background: var(--pq-accent-light);
}
.pq-option.pq-option-selected .pq-opt-letter {
  background: var(--pq-accent);
  color: #fff;
  border-color: var(--pq-accent);
}

.pq-option.pq-option-correct {
  border-color: var(--pq-correct);
  background: var(--pq-correct-bg);
  cursor: default;
}
.pq-option.pq-option-correct .pq-opt-letter {
  background: var(--pq-correct);
  color: #fff;
  border-color: var(--pq-correct);
}

.pq-option.pq-option-incorrect {
  border-color: var(--pq-incorrect);
  background: var(--pq-incorrect-bg);
  cursor: default;
}
.pq-option.pq-option-incorrect .pq-opt-letter {
  background: var(--pq-incorrect);
  color: #fff;
  border-color: var(--pq-incorrect);
}

.pq-option.pq-option-reveal-correct {
  border-color: var(--pq-correct);
  background: var(--pq-correct-bg);
  cursor: default;
}
.pq-option.pq-option-reveal-correct .pq-opt-letter {
  background: var(--pq-correct);
  color: #fff;
  border-color: var(--pq-correct);
}

.pq-option.pq-option-locked {
  cursor: default;
  opacity: 0.6;
}
.pq-option.pq-option-locked:hover {
  transform: none;
  border-color: var(--pq-divider);
  background: var(--pq-bg-subtle);
}

/* ─── Action Buttons ─────────────────────────────────────────── */
.pq-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.pq-btn {
  padding: 11px 22px;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--pq-font);
  border: none;
  border-radius: var(--pq-radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  touch-action: manipulation;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.pq-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.pq-btn-primary {
  background: var(--pq-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.25);
}
.pq-btn-primary:hover:not(:disabled) {
  background: var(--pq-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
}
.pq-btn-secondary {
  background: var(--pq-bg-subtle);
  color: var(--pq-text);
  border: 1px solid var(--pq-divider);
}
.pq-btn-secondary:hover:not(:disabled) {
  background: var(--pq-divider);
}
.pq-btn-success {
  background: var(--pq-correct);
  color: #fff;
  box-shadow: 0 2px 8px rgba(22, 163, 74, 0.25);
}
.pq-btn-success:hover:not(:disabled) {
  background: #15803d;
  transform: translateY(-1px);
}

/* ─── Evaluation / Breakdown View ────────────────────────────── */
.pq-evaluation {
  animation: pqEvalIn 0.35s ease-out;
  margin-top: 20px;
}
@keyframes pqEvalIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.pq-eval-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: var(--pq-radius-sm);
  margin-bottom: 16px;
  font-weight: 700;
  font-size: 15px;
}
.pq-eval-banner.correct {
  background: var(--pq-correct-bg);
  color: var(--pq-correct);
  border: 1px solid var(--pq-correct-border);
}
.pq-eval-banner.incorrect {
  background: var(--pq-incorrect-bg);
  color: var(--pq-incorrect);
  border: 1px solid var(--pq-incorrect-border);
}

/* Breakdown card */
.pq-breakdown {
  background: var(--pq-bg-subtle);
  border: 1px solid var(--pq-divider);
  border-radius: var(--pq-radius-sm);
  padding: 20px 22px;
  margin-bottom: 16px;
}
.pq-breakdown h4 {
  font-family: var(--pq-font-heading);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--pq-accent);
  margin: 0 0 12px;
}
.pq-breakdown-citation {
  background: var(--pq-bg);
  border-left: 3px solid var(--pq-accent);
  padding: 10px 14px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--pq-text);
  margin-bottom: 12px;
  font-family: var(--pq-font-mono);
  font-size: 12px;
}
.pq-breakdown-rationale {
  font-size: 14px;
  line-height: 1.7;
  color: var(--pq-text);
  margin-bottom: 12px;
}
.pq-breakdown-rationale strong {
  color: var(--pq-accent);
}
.pq-breakdown-hotspots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.pq-hotspot {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  background: var(--pq-accent-light);
  color: var(--pq-accent);
  border-radius: 4px;
  border: 1px solid rgba(124, 58, 237, 0.2);
}

/* ─── Results Summary ────────────────────────────────────────── */
.pq-results {
  text-align: center;
  padding: 20px 0;
}
.pq-results-icon {
  font-size: 56px;
  margin-bottom: 8px;
}
.pq-results h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--pq-text);
  margin: 0 0 6px;
}
.pq-results-score {
  font-size: 48px;
  font-weight: 700;
  font-family: var(--pq-font-heading);
  color: var(--pq-accent);
  margin: 4px 0;
}
.pq-results-sub {
  font-size: 14px;
  color: var(--pq-text-mid);
  margin-bottom: 20px;
}
.pq-results-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.pq-results-stat {
  text-align: center;
  min-width: 70px;
}
.pq-results-stat .num {
  font-size: 28px;
  font-weight: 700;
}
.pq-results-stat .lbl {
  font-size: 11px;
  color: var(--pq-text-mid);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.pq-results-breakdown {
  text-align: left;
  margin: 16px 0;
}
.pq-results-breakdown h4 {
  font-family: var(--pq-font-heading);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--pq-text-mid);
  margin: 0 0 12px;
}
.pq-rb-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--pq-divider);
  font-size: 13px;
}
.pq-rb-item:last-child {
  border-bottom: none;
}
.pq-rb-pct {
  font-weight: 700;
}
.pq-rb-pct.good { color: var(--pq-correct); }
.pq-rb-pct.ok { color: var(--pq-warning); }
.pq-rb-pct.bad { color: var(--pq-incorrect); }

.pq-results-review {
  text-align: left;
  margin: 16px 0;
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--pq-divider);
  border-radius: var(--pq-radius-sm);
  padding: 16px;
}
.pq-rr-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--pq-divider);
}
.pq-rr-item:last-child {
  border-bottom: none;
}
.pq-rr-q {
  font-weight: 600;
  font-size: 13px;
  color: var(--pq-text);
  margin-bottom: 6px;
}
.pq-rr-ans {
  font-size: 12px;
  margin: 2px 0;
}
.pq-rr-ans.your {
  color: var(--pq-text-mid);
}
.pq-rr-ans.correct-ans {
  color: var(--pq-correct);
}
.pq-rr-ans.wrong-ans {
  color: var(--pq-incorrect);
}

/* ─── Mobile Toggle Tab (sticky bottom) ──────────────────────── */
.pq-mobile-toggle {
  display: none;
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20005;
  background: var(--pq-accent);
  color: #fff;
  border: none;
  border-radius: 24px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--pq-font);
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
  transition: transform 0.15s, box-shadow 0.15s;
  touch-action: manipulation;
  gap: 8px;
  align-items: center;
}
.pq-mobile-toggle:hover {
  transform: translateX(-50%) translateY(-2px);
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.5);
}
.pq-mobile-toggle:active {
  transform: translateX(-50%) translateY(0);
}

/* ─── Maximized Modal (full-viewport) ─────────────────────────── */
.pq-modal.pq-maximized {
  width: 100vw;
  height: 100vh;
  max-width: 100vw;
  max-height: 100vh;
  border-radius: 0;
  animation: none;
}
.pq-max-btn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--pq-font);
  color: var(--pq-text-mid);
  padding: 4px 8px;
  line-height: 1;
  transition: all 0.15s;
  touch-action: manipulation;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.pq-max-btn:hover {
  background: var(--pq-bg-subtle);
  color: var(--pq-text);
  border-color: var(--pq-divider);
}
.pq-max-btn.pq-maximized {
  color: var(--pq-accent);
  background: var(--pq-accent-light);
  border-color: var(--pq-accent);
}
.pq-header .pq-max-btn {
  padding: 4px 7px;
  font-size: 15px;
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 820px) {
  .pq-modal {
    width: 100vw;
    height: 100vh;
    max-width: 100vw;
    max-height: 100vh;
    border-radius: 0;
  }

  .pq-body {
    flex-direction: column;
  }

  .pq-exhibit-panel {
    width: 100%;
    min-width: 0;
    border-right: none;
    border-bottom: 1px solid var(--pq-divider);
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .pq-exhibit-panel.pq-hidden-mobile {
    display: none;
  }

  .pq-quiz-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .pq-quiz-panel.pq-hidden-mobile {
    display: none;
  }

  .pq-quiz-scroll {
    padding: 18px 20px;
  }

  .pq-mobile-toggle {
    display: flex;
  }

  .pq-exhibit-scroll {
    padding: 14px;
  }

  .pq-option {
    padding: 12px 14px;
    font-size: 13px;
  }

  .pq-question-text {
    font-size: 15px;
  }

  .pq-header {
    padding: 10px 16px;
  }

  .pq-header-progress {
    gap: 6px;
  }

  .pq-header-sub {
    display: none;
  }
}

@media (max-width: 480px) {
  .pq-quiz-scroll {
    padding: 14px 14px;
  }
  .pq-options {
    gap: 8px;
  }
  .pq-option {
    padding: 10px 12px;
    gap: 10px;
  }
  .pq-question-text {
    font-size: 14px;
    margin-bottom: 16px;
    padding-bottom: 14px;
  }
  .pq-btn {
    padding: 9px 16px;
    font-size: 12px;
  }
  .pq-eval-banner {
    font-size: 13px;
    padding: 10px 14px;
  }
  .pq-breakdown {
    padding: 14px 16px;
  }
  .pq-mobile-toggle {
    padding: 10px 20px;
    font-size: 13px;
    bottom: 14px;
  }
}

/* ─── Dark Mode ──────────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  .pq-modal { background: #1e293b; }
  .pq-header { background: #1e293b; border-bottom-color: #334155; }
  .pq-header-title { color: #f1f5f9; }
  .pq-header-sub { color: #94a3b8; }
  .pq-header-timer { background: #0f172a; border-color: #475569; color: #e2e8f0; }
  .pq-header-close { background: #334155; color: #94a3b8; }
  .pq-header-close:hover { background: #475569; color: #f1f5f9; }
  .pq-max-btn { color: #94a3b8; }
  .pq-max-btn:hover { background: #334155; color: #f1f5f9; border-color: #475569; }
  .pq-max-btn.pq-maximized { background: #1e293b; color: #a78bfa; border-color: #a78bfa; }
  .pq-modal.pq-maximized { background: #0f172a; }
  .pq-exhibit-panel { background: #0f172a; border-right-color: #334155; }
  .pq-exhibit-header { background: #1e293b; border-bottom-color: #334155; }
  .pq-exhibit-title { color: #f1f5f9; }
  .pq-exhibit-scroll p, .pq-exhibit-scroll li { color: #cbd5e1; }
  .pq-exhibit-scroll strong { color: #f1f5f9; }
  .pq-exhibit-table tbody td { color: #cbd5e1; border-bottom-color: #334155; }
  .pq-exhibit-table tbody tr:nth-child(even) { background: #0f172a; }
  .pq-exhibit-table tbody tr:hover { background: #1e293b; }
  .pq-exhibit-plan { background: #0f172a; border-color: #334155; }
  .pq-exhibit-brief { background: #0f172a; border-color: #334155; }
  .pq-quiz-panel { background: #1e293b; }
  .pq-question-text { color: #f1f5f9; border-bottom-color: #334155; }
  .pq-option { background: #0f172a; border-color: #475569; color: #e2e8f0; }
  .pq-option:hover:not(.pq-option-locked) { border-color: #a78bfa; background: #1e293b; }
  .pq-option .pq-opt-letter { background: #1e293b; border-color: #475569; color: #94a3b8; }
  .pq-option.pq-option-selected { border-color: #a78bfa; background: #1e293b; }
  .pq-option.pq-option-selected .pq-opt-letter { background: #a78bfa; color: #fff; border-color: #a78bfa; }
  .pq-breakdown { background: #0f172a; border-color: #334155; }
  .pq-breakdown h4 { color: #a78bfa; }
  .pq-breakdown-citation { background: #1e293b; color: #e2e8f0; }
  .pq-breakdown-rationale { color: #cbd5e1; }
  .pq-breakdown-rationale strong { color: #a78bfa; }
  .pq-hotspot { background: rgba(167, 139, 250, 0.15); color: #a78bfa; border-color: rgba(167, 139, 250, 0.3); }
  .pq-results h2 { color: #f1f5f9; }
  .pq-results-sub { color: #94a3b8; }
  .pq-results-review { border-color: #334155; }
  .pq-rb-item { border-bottom-color: #334155; }
  .pq-rr-item { border-bottom-color: #334155; }
  .pq-rr-q { color: #f1f5f9; }
  .pq-btn-secondary { background: #334155; color: #e2e8f0; border-color: #475569; }
  .pq-btn-secondary:hover:not(:disabled) { background: #475569; }
}

/* Manual dark mode */
.dark-mode .pq-modal { background: #1e293b; }
.dark-mode .pq-header { background: #1e293b; border-bottom-color: #334155; }
.dark-mode .pq-header-title { color: #f1f5f9; }
.dark-mode .pq-header-sub { color: #94a3b8; }
.dark-mode .pq-header-timer { background: #0f172a; border-color: #475569; color: #e2e8f0; }
.dark-mode .pq-header-close { background: #334155; color: #94a3b8; }
.dark-mode .pq-header-close:hover { background: #475569; color: #f1f5f9; }
.dark-mode .pq-max-btn { color: #94a3b8; }
.dark-mode .pq-max-btn:hover { background: #334155; color: #f1f5f9; border-color: #475569; }
.dark-mode .pq-max-btn.pq-maximized { background: #1e293b; color: #a78bfa; border-color: #a78bfa; }
.dark-mode .pq-modal.pq-maximized { background: #0f172a; }
.dark-mode .pq-exhibit-panel { background: #0f172a; border-right-color: #334155; }
.dark-mode .pq-exhibit-header { background: #1e293b; border-bottom-color: #334155; }
.dark-mode .pq-exhibit-title { color: #f1f5f9; }
.dark-mode .pq-exhibit-scroll p, .dark-mode .pq-exhibit-scroll li { color: #cbd5e1; }
.dark-mode .pq-exhibit-scroll strong { color: #f1f5f9; }
.dark-mode .pq-exhibit-table tbody td { color: #cbd5e1; border-bottom-color: #334155; }
.dark-mode .pq-exhibit-table tbody tr:nth-child(even) { background: #0f172a; }
.dark-mode .pq-exhibit-table tbody tr:hover { background: #1e293b; }
.dark-mode .pq-exhibit-plan { background: #0f172a; border-color: #334155; }
.dark-mode .pq-exhibit-brief { background: #0f172a; border-color: #334155; }
.dark-mode .pq-quiz-panel { background: #1e293b; }
.dark-mode .pq-question-text { color: #f1f5f9; border-bottom-color: #334155; }
.dark-mode .pq-option { background: #0f172a; border-color: #475569; color: #e2e8f0; }
.dark-mode .pq-option:hover:not(.pq-option-locked) { border-color: #a78bfa; background: #1e293b; }
.dark-mode .pq-option .pq-opt-letter { background: #1e293b; border-color: #475569; color: #94a3b8; }
.dark-mode .pq-option.pq-option-selected { border-color: #a78bfa; background: #1e293b; }
.dark-mode .pq-option.pq-option-selected .pq-opt-letter { background: #a78bfa; color: #fff; border-color: #a78bfa; }
.dark-mode .pq-option.pq-option-correct { border-color: #16a34a; background: #052e16; }
.dark-mode .pq-option.pq-option-incorrect { border-color: #dc2626; background: #450a0a; }
.dark-mode .pq-option.pq-option-reveal-correct { border-color: #16a34a; background: #052e16; }
.dark-mode .pq-breakdown { background: #0f172a; border-color: #334155; }
.dark-mode .pq-breakdown h4 { color: #a78bfa; }
.dark-mode .pq-breakdown-citation { background: #1e293b; color: #e2e8f0; }
.dark-mode .pq-breakdown-rationale { color: #cbd5e1; }
.dark-mode .pq-breakdown-rationale strong { color: #a78bfa; }
.dark-mode .pq-hotspot { background: rgba(167, 139, 250, 0.15); color: #a78bfa; border-color: rgba(167, 139, 250, 0.3); }
.dark-mode .pq-results h2 { color: #f1f5f9; }
.dark-mode .pq-results-sub { color: #94a3b8; }
.dark-mode .pq-results-review { border-color: #334155; }
.dark-mode .pq-rb-item { border-bottom-color: #334155; }
.dark-mode .pq-rr-item { border-bottom-color: #334155; }
.dark-mode .pq-rr-q { color: #f1f5f9; }
.dark-mode .pq-btn-secondary { background: #334155; color: #e2e8f0; border-color: #475569; }
.dark-mode .pq-btn-secondary:hover:not(:disabled) { background: #475569; }


/* ===================================================================
   ExAC Exam Simulation — Additional Styles
   =================================================================== */

/* --- Toolbar --- */
.pq-toolbar {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-bottom: 1px solid var(--pq-divider);
  background: var(--pq-bg);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.pq-tool-group {
  display: flex;
  align-items: center;
  gap: 4px;
}
.pq-tool-separator {
  width: 1px;
  height: 24px;
  background: var(--pq-divider);
  margin: 0 6px;
}
.pq-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--pq-font);
  color: var(--pq-text-mid);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  touch-action: manipulation;
  white-space: nowrap;
}
.pq-tool-btn:hover {
  background: var(--pq-bg-subtle);
  color: var(--pq-text);
  border-color: var(--pq-divider);
}
.pq-tool-btn:active {
  transform: scale(0.96);
}
.pq-tool-btn .pq-tool-icon {
  font-size: 14px;
  line-height: 1;
}
.pq-tool-btn.pq-flag-active {
  color: #f59e0b;
  background: #fef9c3;
  border-color: #f59e0b;
}
.pq-tool-btn.pq-tool-active {
  color: var(--pq-accent);
  background: var(--pq-accent-light);
  border-color: var(--pq-accent);
}
.pq-tool-btn.pq-flag-active {
  color: #f59e0b;
  background: #fef9c3;
  border-color: #f59e0b;
}

/* --- Option Strikethrough --- */
.pq-option.pq-option-strikethrough {
  opacity: 0.4;
  text-decoration: line-through;
  cursor: pointer;
  border-color: #fca5a5;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 3px,
    rgba(220, 38, 38, 0.06) 3px,
    rgba(220, 38, 38, 0.06) 6px
  );
}
.pq-option.pq-option-strikethrough:hover {
  opacity: 0.5;
  border-color: #fca5a5;
}
.pq-option.pq-option-strikethrough .pq-opt-letter {
  background: #fee2e2;
  color: #dc2626;
  border-color: #fca5a5;
}
.pq-opt-strike-icon {
  font-size: 12px;
  color: #dc2626;
  flex-shrink: 0;
  margin-left: 4px;
}

/* --- Highlight Mode --- */
.pq-highlightable {
  cursor: text;
  user-select: text;
}
.pq-highlight {
  background: #fef08a;
  border-radius: 2px;
  padding: 0 1px;
  cursor: default;
}

/* --- Navigation Buttons --- */
.pq-nav-buttons {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 16px 0 4px;
  border-top: 1px solid var(--pq-divider);
  margin-top: 16px;
}

/* --- Item Review Grid --- */
.pq-review-grid-container {
  max-width: 600px;
  margin: 0 auto;
  padding: 32px 0;
}
.pq-review-status {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.pq-rs-item {
  font-size: 13px;
  color: var(--pq-text);
  display: flex;
  align-items: center;
  gap: 6px;
}
.pq-rs-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
  flex-shrink: 0;
}
.pq-rs-dot.answered { background: #16a34a; }
.pq-rs-dot.unanswered { background: var(--pq-divider); border: 1px solid var(--pq-text-light); }
.pq-rs-dot.flagged { background: #f59e0b; }

.pq-review-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}
@media (max-width: 480px) {
  .pq-review-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
}
.pq-rg-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 10px 6px;
  background: var(--pq-bg);
  border: 2px solid var(--pq-divider);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--pq-font);
  min-height: 48px;
  position: relative;
}
.pq-rg-cell:hover {
  border-color: var(--pq-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(124,58,237,0.15);
}
.pq-rg-cell.answered {
  border-color: #16a34a;
  background: #f0fdf4;
}
.pq-rg-cell.flagged {
  border-color: #f59e0b;
  background: #fef9c3;
}
.pq-rg-cell.answered.flagged {
  border-color: #16a34a;
  background: linear-gradient(135deg, #f0fdf4 60%, #fef9c3);
}
.pq-rg-num { font-size: 16px; font-weight: 700; color: var(--pq-text); }
.pq-rg-flag {
  font-size: 12px;
  color: #f59e0b;
  position: absolute;
  top: 2px;
  right: 4px;
}

/* --- Summary Screen --- */
.pq-summary-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 0;
}
.pq-summary-warning {
  background: #fef9c3;
  border: 1px solid #f59e0b;
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 16px;
  font-size: 14px;
  color: #92400e;
  line-height: 1.6;
}
.pq-summary-list {
  border: 1px solid var(--pq-divider);
  border-radius: 8px;
  overflow: hidden;
  max-height: 360px;
  overflow-y: auto;
}
.pq-summary-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--pq-divider);
  transition: background 0.1s;
}
.pq-summary-item:last-child { border-bottom: none; }
.pq-summary-item:hover { background: var(--pq-bg-subtle); }
.pq-si-left { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.pq-si-num { font-size: 14px; font-weight: 700; color: var(--pq-text); width: 24px; text-align: center; }
.pq-si-flag { font-size: 12px; color: #f59e0b; }
.pq-si-status { font-size: 14px; }
.pq-si-status.done { color: #16a34a; }
.pq-si-status.miss { color: #dc2626; }
.pq-si-right { flex: 1; min-width: 0; }
.pq-si-q { font-size: 12px; color: var(--pq-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pq-si-a { font-size: 11px; color: var(--pq-text-mid); }
.pq-si-jump {
  font-size: 11px;
  font-weight: 600;
  color: var(--pq-accent);
  background: var(--pq-accent-light);
  border: none;
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  flex-shrink: 0;
  font-family: var(--pq-font);
}
.pq-si-jump:hover { background: #ddd6fe; }

/* --- Confirmation Screen --- */
.pq-confirm-container {
  max-width: 520px;
  margin: 0 auto;
  padding: 40px 0;
}
.pq-confirm-box {
  background: var(--pq-bg-subtle);
  border: 1px solid var(--pq-divider);
  border-radius: 12px;
  padding: 24px;
}

/* --- Timer critical --- */
.pq-header-timer.critical {
  color: #fff;
  border-color: #dc2626;
  background: #dc2626;
  animation: pqPulse 0.5s infinite;
}

/* --- Results rationale --- */
.pq-rr-rationale {
  font-size: 12px;
  color: var(--pq-text-mid);
  margin-top: 4px;
  padding: 6px 10px;
  background: var(--pq-bg-subtle);
  border-radius: 4px;
  border-left: 2px solid var(--pq-accent);
  line-height: 1.5;
}

/* --- Scrollbar styling --- */
.pq-quiz-scroll::-webkit-scrollbar { width: 6px; }
.pq-quiz-scroll::-webkit-scrollbar-track { background: transparent; }
.pq-quiz-scroll::-webkit-scrollbar-thumb { background: var(--pq-divider); border-radius: 3px; }
.pq-exhibit-scroll::-webkit-scrollbar { width: 6px; }
.pq-exhibit-scroll::-webkit-scrollbar-track { background: transparent; }
.pq-exhibit-scroll::-webkit-scrollbar-thumb { background: var(--pq-divider); border-radius: 3px; }

/* --- Dark mode overrides --- */
@media (prefers-color-scheme: dark) {
  .pq-toolbar { background: #1e293b; border-bottom-color: #334155; }
  .pq-tool-btn { color: #94a3b8; }
  .pq-tool-btn:hover { background: #334155; color: #f1f5f9; border-color: #475569; }
  .pq-tool-btn.pq-flag-active { background: #422006; color: #fbbf24; border-color: #f59e0b; }
  .pq-tool-btn.pq-tool-active { background: #1e293b; color: #a78bfa; border-color: #a78bfa; }
  .pq-highlight { background: #854d0e; color: #fef9c3; }
  .pq-rg-cell { background: #1e293b; border-color: #475569; }
  .pq-rg-cell.answered { background: #052e16; border-color: #16a34a; }
  .pq-rg-cell.flagged { background: #422006; border-color: #f59e0b; }
  .pq-rg-cell.answered.flagged { background: linear-gradient(135deg, #052e16 60%, #422006); }
  .pq-rg-num { color: #f1f5f9; }
  .pq-summary-warning { background: #422006; border-color: #f59e0b; color: #fbbf24; }
  .pq-summary-item { border-bottom-color: #334155; }
  .pq-summary-item:hover { background: #1e293b; }
  .pq-si-num { color: #f1f5f9; }
  .pq-si-jump { background: #1e293b; }
  .pq-si-jump:hover { background: #334155; }
  .pq-confirm-box { background: #1e293b; border-color: #334155; }
}

/* Manual dark mode class */
.dark-mode .pq-toolbar { background: #1e293b; border-bottom-color: #334155; }
.dark-mode .pq-tool-btn { color: #94a3b8; }
.dark-mode .pq-tool-btn:hover { background: #334155; color: #f1f5f9; border-color: #475569; }
.dark-mode .pq-tool-btn.pq-flag-active { background: #422006; color: #fbbf24; border-color: #f59e0b; }
.dark-mode .pq-tool-btn.pq-tool-active { background: #1e293b; color: #a78bfa; border-color: #a78bfa; }
.dark-mode .pq-highlight { background: #854d0e; color: #fef9c3; }
.dark-mode .pq-rg-cell { background: #1e293b; border-color: #475569; }
.dark-mode .pq-rg-cell.answered { background: #052e16; border-color: #16a34a; }
.dark-mode .pq-rg-cell.flagged { background: #422006; border-color: #f59e0b; }
.dark-mode .pq-rg-cell.answered.flagged { background: linear-gradient(135deg, #052e16 60%, #422006); }
.dark-mode .pq-rg-num { color: #f1f5f9; }
.dark-mode .pq-summary-warning { background: #422006; border-color: #f59e0b; color: #fbbf24; }
.dark-mode .pq-summary-item { border-bottom-color: #334155; }
.dark-mode .pq-summary-item:hover { background: #1e293b; }
.dark-mode .pq-si-num { color: #f1f5f9; }
.dark-mode .pq-si-jump { background: #1e293b; }
.dark-mode .pq-si-jump:hover { background: #334155; }
.dark-mode .pq-confirm-box { background: #1e293b; border-color: #334155; }

/* ─── Theme Toggle Button ─────────────────────────────────── */
.pq-theme-btn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--pq-font);
  color: var(--pq-text-mid);
  padding: 4px 8px;
  line-height: 1;
  transition: all 0.15s;
  touch-action: manipulation;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.pq-theme-btn:hover {
  background: var(--pq-bg-subtle);
  color: var(--pq-text);
  border-color: var(--pq-divider);
}

/* ─── AI Analysis Section ──────────────────────────────────── */
.pq-ai-section {
  margin: 16px 0 20px;
  text-align: center;
  padding: 12px;
  background: var(--pq-bg-subtle);
  border-radius: var(--pq-radius-sm);
  border: 1px solid var(--pq-divider);
}
.pq-ai-analysis-btn {
  background: linear-gradient(135deg, #7c3aed, #a78bfa) !important;
  color: #fff !important;
  border: none !important;
  font-size: 15px !important;
  padding: 12px 28px !important;
}
.pq-ai-analysis-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(124,58,237,0.3);
}
.pq-ai-question-btn {
  background: var(--pq-accent-light);
  color: var(--pq-accent);
  border: 1px solid var(--pq-accent);
  border-radius: 4px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--pq-font);
  cursor: pointer;
  margin-top: 6px;
  transition: all 0.15s;
}
.pq-ai-question-btn:hover {
  background: var(--pq-accent);
  color: #fff;
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
  .pq-ai-section {
    background: #0f172a;
    border-color: #334155;
  }
  .pq-ai-question-btn {
    background: #1e293b;
    color: #a78bfa;
    border-color: #a78bfa;
  }
  .pq-ai-question-btn:hover {
    background: #a78bfa;
    color: #fff;
  }
}
.dark-mode .pq-ai-section {
  background: #0f172a;
  border-color: #334155;
}
.dark-mode .pq-ai-question-btn {
  background: #1e293b;
  color: #a78bfa;
  border-color: #a78bfa;
}
.dark-mode .pq-ai-question-btn:hover {
  background: #a78bfa;
  color: #fff;
}