/* ============================================================
   NCLEX Pro LMS — Quiz Engine CSS
   All quiz / exam UI: question rendering, answer types, timer,
   progress, and CAT-specific result screens
   ============================================================ */

/* ── Quiz Shell (full-screen exam mode) ──────────────────── */
.quiz-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--color-bg-dark);
}

.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-8);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 50;
  gap: var(--space-4);
}

.quiz-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.quiz-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.quiz-progress-wrap {
  flex: 1;
  max-width: 400px;
}

.quiz-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

/* CAT mode: hide progress (keeps test secure) */
.cat-mode .quiz-progress-wrap { display: none; }

/* Timer */
.quiz-timer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: var(--radius-md);
}
.quiz-timer.warning { color: var(--color-warning); border-color: var(--border-color); }
.quiz-timer.danger  { color: var(--color-danger);  border-color: rgba(247,107,107,0.3); animation: pulse 1.5s infinite; }

/* ── Question Area ───────────────────────────────────────── */
.quiz-body {
  padding: var(--space-8);
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.question-number-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.question-type-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 10px;
  background: var(--color-primary-glow);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.question-stem {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
  font-weight: 500;
}

.question-stem img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: var(--space-4) 0;
}

.question-hint {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-warning-glow);
  border: 1px solid rgba(255,184,48,0.2);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--color-warning);
  margin-bottom: var(--space-4);
}

/* ── Answer Options ──────────────────────────────────────── */
.options-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.option-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: rgba(255,255,255,0.03);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
  user-select: none;
}

.option-item:hover {
  background: rgba(255,255,255,0.055);
  border-color: var(--border-color-hover);
}

.option-item.selected {
  border-color: var(--color-primary);
  background: rgba(79,142,247,0.08);
}

.option-item.correct {
  border-color: var(--color-success);
  background: rgba(61,213,152,0.08);
}

.option-item.incorrect {
  border-color: var(--color-danger);
  background: rgba(247,107,107,0.08);
}

.option-item.disabled {
  cursor: default;
  opacity: 0.7;
}

.option-selector {
  flex-shrink: 0;
  width: 24px; height: 24px;
  margin-top: 1px;
}

/* MCQ: radio */
.option-item .option-radio {
  width: 20px; height: 20px;
  border: 2px solid var(--border-color-hover);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-fast);
}
.option-item.selected .option-radio {
  border-color: var(--color-primary);
  background: var(--color-primary);
}
.option-item.selected .option-radio::after {
  content: '';
  width: 8px; height: 8px;
  background: #fff;
  border-radius: 50%;
}
.option-item.correct .option-radio { border-color: var(--color-success); background: var(--color-success); }
.option-item.incorrect .option-radio { border-color: var(--color-danger); background: var(--color-danger); }

/* SATA: checkbox */
.option-item .option-checkbox {
  width: 20px; height: 20px;
  border: 2px solid var(--border-color-hover);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-fast);
}
.option-item.selected .option-checkbox {
  border-color: var(--color-primary);
  background: var(--color-primary);
}
.option-item.selected .option-checkbox::before {
  content: '✓';
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
}

.option-label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}

.option-item.selected .option-label { background: var(--color-primary); color: #fff; }
.option-item.correct .option-label  { background: var(--color-success); color: var(--text-inverse); }
.option-item.incorrect .option-label { background: var(--color-danger); color: #fff; }

.option-text {
  flex: 1;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.option-item.selected .option-text  { color: var(--text-primary); }

.option-result-icon {
  margin-left: auto;
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* ── NGN Question Types ──────────────────────────────────── */

/* Matrix / Grid */
.matrix-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: var(--space-4);
}
.matrix-table th {
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}
.matrix-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
  vertical-align: middle;
}
.matrix-table td:first-child { text-align: left; color: var(--text-secondary); font-size: 0.9rem; }
.matrix-table tbody tr:hover td { background: rgba(255,255,255,0.025); }

.matrix-radio {
  width: 18px; height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* Cloze / Drop-down */
.cloze-text {
  font-size: 1rem;
  line-height: 2.2;
  color: var(--text-primary);
}
.cloze-select {
  display: inline-block;
  background: rgba(79,142,247,0.1);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  color: var(--color-primary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  appearance: none;
  padding-right: 24px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%234F8EF7' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
}
.cloze-select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 2px var(--color-primary-glow); }

/* Hot Spot */
.hotspot-container {
  position: relative;
  display: inline-block;
  width: 100%;
}
.hotspot-text {
  font-size: 1rem;
  line-height: 2;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}
.hotspot-word {
  display: inline;
  padding: 2px 4px;
  border-radius: 3px;
  cursor: pointer;
  transition: var(--transition-fast);
}
.hotspot-word:hover { background: rgba(79,142,247,0.15); }
.hotspot-word.highlighted { background: var(--color-primary); color: #fff; border-radius: 3px; }
.hotspot-word.correct { background: var(--color-success); color: var(--text-inverse); }
.hotspot-word.incorrect.was-highlighted { background: var(--color-danger); color: #fff; }

/* Bow-Tie */
.bowtie-container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-4);
  align-items: start;
}
.bowtie-section {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.bowtie-section h4 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}
.bowtie-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.5rem;
  padding-top: 40px;
}
.bowtie-center {
  background: var(--color-primary-glow);
  border-color: var(--border-primary);
}

/* Drag & Drop */
.drag-source-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-4);
  background: rgba(255,255,255,0.02);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  min-height: 60px;
  margin-bottom: var(--space-4);
}
.drag-item {
  padding: 8px 14px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--border-color-hover);
  border-radius: var(--radius-md);
  cursor: grab;
  font-size: 0.88rem;
  color: var(--text-secondary);
  user-select: none;
  transition: var(--transition-fast);
}
.drag-item:hover  { border-color: var(--color-primary); color: var(--color-primary); }
.drag-item.dragging { opacity: 0.4; cursor: grabbing; }
.drag-item.placed { background: rgba(79,142,247,0.1); border-color: var(--border-primary); color: var(--color-primary); }

.drop-target {
  min-height: 46px;
  background: rgba(255,255,255,0.02);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: var(--transition-fast);
  flex: 1;
}
.drop-target.over  { border-color: var(--color-primary); background: rgba(79,142,247,0.06); }
.drop-target.has-item { border-style: solid; border-color: var(--border-primary); }

/* Ordered Response */
.ordered-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.ordered-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255,255,255,0.03);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: grab;
  transition: var(--transition-fast);
}
.ordered-item:hover { border-color: var(--border-color-hover); }
.ordered-item.dragging { opacity: 0.4; cursor: grabbing; }
.ordered-handle { color: var(--text-muted); cursor: grab; font-size: 1rem; }
.ordered-num {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* Fill in the blank */
.fill-blank-input {
  display: inline-block;
  min-width: 120px;
  background: rgba(79,142,247,0.08);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  font-size: 0.95rem;
  color: var(--color-primary);
  text-align: center;
  transition: var(--transition-fast);
}
.fill-blank-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-glow);
}

/* ── Rationale / Explanation ─────────────────────────────── */
.rationale-box {
  margin-top: var(--space-6);
  padding: var(--space-5);
  background: rgba(61,213,152,0.06);
  border: 1px solid rgba(61,213,152,0.2);
  border-radius: var(--radius-lg);
  animation: slideInUp 0.4s ease;
}
.rationale-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-weight: 700;
  color: var(--color-success);
  font-size: 0.9rem;
}
.rationale-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ── Quiz Footer / Navigation ────────────────────────────── */
.quiz-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-8);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-top: var(--glass-border);
  position: sticky;
  bottom: 0;
  gap: var(--space-4);
}

.quiz-footer-info {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.flag-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
}
.flag-btn:hover  { border-color: var(--color-warning); color: var(--color-warning); }
.flag-btn.active { border-color: var(--color-warning); color: var(--color-warning); background: var(--color-warning-glow); }

/* ── CAT Pass/Fail Result Screen ─────────────────────────── */
.result-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-16) var(--space-8);
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.result-verdict {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-6);
  animation: bounceIn 0.6s ease;
}

.result-verdict.pass {
  background: var(--color-success-glow);
  border: 2px solid var(--color-success);
  color: var(--color-success);
  box-shadow: var(--shadow-accent);
}

.result-verdict.fail {
  background: var(--color-danger-glow);
  border: 2px solid var(--color-danger);
  color: var(--color-danger);
}

.result-theta {
  font-family: var(--font-heading);
  font-size: 5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-2);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.result-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  width: 100%;
  margin: var(--space-8) 0;
}

.result-stat-item {
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.result-stat-value {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
}

.result-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

/* ── Domain Performance mini bars (in result) ────────────── */
.domain-perf-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.domain-perf-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.domain-perf-name {
  width: 200px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  flex-shrink: 0;
  text-align: left;
}
.domain-perf-bar {
  flex: 1;
  height: 6px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.domain-perf-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 1s cubic-bezier(0.4,0,0.2,1);
}
.domain-perf-pct {
  width: 40px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-align: right;
  flex-shrink: 0;
}

/* ── Theta Meter ─────────────────────────────────────────── */
.theta-meter {
  width: 100%;
  height: 12px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
  margin: var(--space-4) 0;
}
.theta-meter-fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-danger), var(--color-warning), var(--color-success));
  transition: width 1.5s cubic-bezier(0.4,0,0.2,1);
}
.theta-meter-marker {
  position: absolute;
  top: -3px; bottom: -3px;
  width: 2px;
  background: rgba(255,255,255,0.5);
  border-radius: var(--radius-full);
}
.theta-meter-label {
  position: absolute;
  top: 16px;
  font-size: 0.7rem;
  color: var(--text-muted);
  transform: translateX(-50%);
}

/* ── Responsive quiz ─────────────────────────────────────── */
@media (max-width: 768px) {
  .quiz-body  { padding: var(--space-5) var(--space-4); }
  .quiz-header { padding: var(--space-3) var(--space-4); }
  .quiz-footer { padding: var(--space-4); flex-wrap: wrap; }
  .bowtie-container { grid-template-columns: 1fr; }
  .result-stats-grid { grid-template-columns: 1fr; }
  .domain-perf-name { width: 140px; font-size: 0.78rem; }
  .result-theta { font-size: 3.5rem; }
}