/* ============================================
   EXAM SIMULATOR STYLES
   ============================================ */

/* === Config Screen === */
.exam-config-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.exam-config-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  border-radius: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.exam-config-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(239, 68, 68, 0.1);
  color: #EF4444;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.exam-config-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
}

.exam-config-value {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
}

/* Domain Weights */
.exam-domain-weights {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.exam-domain-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.exam-domain-bar {
  flex: 1;
  height: 8px;
  border-radius: 4px;
  background: var(--bg-tertiary);
  overflow: hidden;
}

/* Exam History */
.exam-history-section {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.exam-history-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(128,128,128,0.06);
  font-size: 13px;
}

.exam-history-date {
  color: var(--text-muted);
  min-width: 100px;
}

.exam-history-score {
  font-weight: 700;
  font-size: 15px;
}

.exam-history-badge {
  margin-left: auto;
  padding: 2px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.exam-history-badge.pass {
  background: rgba(34, 197, 94, 0.12);
  color: var(--success);
}

.exam-history-badge.fail {
  background: rgba(239, 68, 68, 0.12);
  color: var(--danger);
}

/* === Exam Screen === */
.exam-sim-container {
  min-height: 100vh;
}

.exam-timer-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.exam-timer-left,
.exam-timer-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.exam-q-counter {
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
}

.exam-answered-count {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 2px 10px;
  border-radius: 12px;
}

.exam-timer-center {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.exam-btn-small {
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-family);
}

.exam-btn-small:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.exam-btn-finish {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.2);
}

.exam-btn-finish:hover {
  background: rgba(239, 68, 68, 0.2);
}

/* Exam Body Layout */
.exam-body {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 20px;
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Question Card */
.exam-question-card {
  padding: 28px !important;
  border-radius: 16px !important;
}

.exam-question-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.exam-q-num {
  font-weight: 700;
  font-size: 14px;
  color: var(--text-primary);
}

.exam-q-domain {
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 8px;
  background: currentColor;
  background: rgba(128,128,128,0.08);
}

.exam-flag-btn {
  margin-left: auto;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.exam-flag-btn.flagged {
  background: rgba(251, 191, 36, 0.15);
  color: var(--accent-gold);
  border-color: rgba(251, 191, 36, 0.3);
}

.exam-question-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 24px;
}

/* Options */
.exam-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.exam-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: all 0.25s ease;
  font-family: var(--font-family);
}

.exam-option:hover {
  border-color: var(--domain1);
  background: rgba(59, 130, 246, 0.05);
}

.exam-option.selected {
  border-color: var(--domain1);
  background: rgba(59, 130, 246, 0.1);
  box-shadow: 0 0 0 1px var(--domain1);
}

.exam-option-letter {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.exam-option.selected .exam-option-letter {
  background: var(--domain1);
  color: white;
}

/* Navigation Buttons */
.exam-nav-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
}

.exam-nav-btn {
  padding: 10px 24px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-family);
}

.exam-nav-btn:hover:not(:disabled) {
  background: var(--bg-tertiary);
}

.exam-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.exam-nav-btn.primary {
  background: linear-gradient(135deg, #3B82F6, #2563EB);
  border: none;
  color: white;
}

.exam-nav-btn.primary:hover {
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Question Navigator */
.exam-navigator {
  position: sticky;
  top: 60px;
  align-self: start;
  padding: 16px;
  border-radius: 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.exam-nav-title {
  font-weight: 700;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
  text-align: center;
}

.exam-nav-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 3px;
}

.exam-nav-item {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-dim);
  font-size: 9px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  padding: 0;
  font-family: var(--font-family);
}

.exam-nav-item:hover {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.exam-nav-item.current {
  background: var(--domain1);
  color: white;
}

.exam-nav-item.answered {
  background: rgba(59, 130, 246, 0.2);
  color: var(--domain1);
}

.exam-nav-item.flagged {
  background: rgba(251, 191, 36, 0.2);
  color: var(--accent-gold);
}

.exam-nav-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  font-size: 10px;
  color: var(--text-dim);
}

.exam-nav-legend span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.exam-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--bg-tertiary);
  display: inline-block;
}

.exam-legend-dot.current { background: var(--domain1); }
.exam-legend-dot.answered { background: rgba(59, 130, 246, 0.2); }
.exam-legend-dot.flagged { background: rgba(251, 191, 36, 0.2); }

/* Pause Overlay */
.exam-pause-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}

.exam-pause-overlay.show { opacity: 1; }

.exam-pause-card {
  text-align: center;
  padding: 40px !important;
  border-radius: 20px !important;
  max-width: 400px;
}

/* === Results Screen === */
.exam-score-hero {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 40px !important;
  margin-bottom: var(--space-lg);
  border-radius: 20px !important;
}

.exam-score-circle {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 4px solid;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.exam-score-number {
  font-size: 42px;
  font-weight: 800;
  line-height: 1;
}

.exam-score-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.exam-score-status {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 12px;
}

.exam-score-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
  color: var(--text-muted);
}

/* Domain Results */
.exam-result-domains {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.exam-result-domain {
  display: flex;
  align-items: center;
  gap: 12px;
}

.exam-result-domain-name {
  min-width: 130px;
  font-weight: 600;
  font-size: 13px;
}

.exam-result-domain-bar {
  flex: 1;
  height: 10px;
  border-radius: 5px;
  background: var(--bg-tertiary);
  overflow: hidden;
}

.exam-result-domain-bar > div {
  height: 100%;
  border-radius: 5px;
  transition: width 1s ease;
}

.exam-result-domain-score {
  min-width: 100px;
  text-align: right;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
}

/* Incorrect Questions List */
.exam-incorrect-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.exam-incorrect-item {
  display: flex;
  gap: 12px;
  padding: 14px;
  border-radius: 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.exam-incorrect-num {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
}

.exam-incorrect-q {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.exam-incorrect-answers {
  display: flex;
  gap: 16px;
  font-size: 12px;
  font-weight: 600;
}

.exam-incorrect-explain {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid rgba(128,128,128,0.1);
}

/* === Responsive === */
@media (max-width: 900px) {
  .exam-body {
    grid-template-columns: 1fr;
  }

  .exam-navigator {
    position: static;
  }

  .exam-nav-grid {
    grid-template-columns: repeat(15, 1fr);
  }

  .exam-config-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .exam-score-hero {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .exam-timer-bar {
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 12px;
  }

  .exam-timer-center {
    font-size: 18px;
  }

  .exam-nav-grid {
    grid-template-columns: repeat(10, 1fr);
  }
}