/* ==========================================================================
   SAATACADEMY — Question Bank & Quiz Stylesheet
   Scalable MCQ Quiz Interface, Timer, Explanations, & Results
   ========================================================================== */

/* Question Page Container & Header */
.quiz-wrapper {
  padding: 40px 0 80px;
}

.quiz-header-bar {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.quiz-subject-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.quiz-subject-badge {
  background-color: var(--primary-50);
  color: var(--primary-600);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.quiz-progress-text {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-800);
}

.quiz-top-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Quiz Timer */
.timer-box {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #FEF3C7;
  border: 1px solid #FDE68A;
  color: #92400E;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 800;
}

.timer-box.urgent {
  background-color: #FEE2E2;
  border-color: #FCA5A5;
  color: #B91C1C;
  animation: pulseTimer 1s infinite;
}

@keyframes pulseTimer {
  0% { transform: scale(1); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

/* Quiz Progress Bar */
.progress-bar-container {
  width: 100%;
  height: 8px;
  background-color: #E2E8F0;
  border-radius: 4px;
  margin-bottom: 28px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500) 0%, var(--accent-gold) 100%);
  width: 0%;
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* Question Main Card */
.question-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 36px 40px;
  margin-bottom: 24px;
  position: relative;
}

.question-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.topic-tag {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  background-color: var(--bg-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.difficulty-tag {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.difficulty-easy {
  background-color: #D1FAE5;
  color: #065F46;
}

.difficulty-medium {
  background-color: #FEF3C7;
  color: #92400E;
}

.difficulty-hard {
  background-color: #FEE2E2;
  color: #991B1B;
}

.question-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-800);
  line-height: 1.5;
  margin-bottom: 24px;
}

/* Optional Question Image Container */
.question-image-box {
  margin: 16px 0 28px;
  text-align: center;
  background-color: #F8FAFC;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.question-image-box img {
  max-width: 100%;
  height: auto;
  max-height: 240px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.question-image-box.hidden {
  display: none !important;
}

/* MCQ Options List */
.mcq-options-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.mcq-option-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 16px 20px;
  background-color: #FFFFFF;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  color: var(--text-main);
  transition: var(--transition);
  position: relative;
}

.mcq-option-btn:hover:not(:disabled) {
  border-color: var(--primary-500);
  background-color: var(--primary-50);
  transform: translateX(4px);
}

.mcq-option-btn.selected {
  border-color: var(--primary-500);
  background-color: #EEF2FF;
  box-shadow: 0 0 0 1px var(--primary-500);
}

.option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background-color: var(--bg-subtle);
  border-radius: 50%;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: var(--transition);
}

.mcq-option-btn.selected .option-letter {
  background-color: var(--primary-500);
  color: #FFFFFF;
}

/* Feedback states */
.mcq-option-btn.correct {
  border-color: var(--success) !important;
  background-color: var(--success-light) !important;
  color: #065F46;
}

.mcq-option-btn.correct .option-letter {
  background-color: var(--success) !important;
  color: #FFFFFF !important;
}

.mcq-option-btn.incorrect {
  border-color: var(--danger) !important;
  background-color: var(--danger-light) !important;
  color: #991B1B;
}

.mcq-option-btn.incorrect .option-letter {
  background-color: var(--danger) !important;
  color: #FFFFFF !important;
}

.option-text {
  flex: 1;
  font-weight: 500;
}

/* Educational Explanation Box */
.explanation-card {
  margin-top: 24px;
  padding: 22px 24px;
  border-radius: var(--radius-md);
  border-left: 5px solid var(--primary-500);
  background-color: #F8FAFC;
  display: none;
  animation: fadeIn 0.3s ease;
}

.explanation-card.show {
  display: block;
}

.explanation-card.is-correct {
  border-left-color: var(--success);
  background-color: #F0FDF4;
}

.explanation-card.is-incorrect {
  border-left-color: var(--danger);
  background-color: #FEF2F2;
}

.explanation-header {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.explanation-text {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-main);
}

/* Locked Premium Question Card */
.locked-premium-box {
  text-align: center;
  padding: 48px 24px;
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
  border: 2px dashed #CBD5E1;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.locked-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: inline-block;
}

.locked-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-800);
  margin-bottom: 10px;
}

.locked-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 24px;
}

/* Quiz Controls Bar */
.quiz-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.quiz-controls-bar .btn {
  min-width: 140px;
}

/* Quiz Result Modal / Card */
.quiz-results-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 48px 40px;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  animation: fadeIn 0.4s ease;
}

.result-badge-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background-color: var(--primary-50);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  margin-bottom: 20px;
}

.result-title {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary-800);
  margin-bottom: 8px;
}

.result-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.result-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 36px;
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 16px;
}

.result-stat {
  display: flex;
  flex-direction: column;
}

.result-stat-val {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--primary-800);
}

.result-stat-val.stat-correct { color: var(--success); }
.result-stat-val.stat-incorrect { color: var(--danger); }
.result-stat-val.stat-percentage { color: var(--primary-500); }

.result-stat-lbl {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  margin-top: 4px;
}

.result-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}