/* --- Quiz Modal Styles --- */

/* Quiz overlay */
.quiz-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.quiz-overlay.visible {
  opacity: 1;
  visibility: visible;
}

/* Quiz container with NFA spotlight */
.quiz-container {
  display: flex;
  align-items: center;
  gap: 30px;
  width: 90%;
  max-width: 1200px;
}

/* NFA spotlight panel */
.nfa-spotlight {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  padding: 20px;
  min-width: 500px;
  max-width: 650px;
  width: 45%;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  transform: scale(0.9) translateX(-30px);
  transition: all 0.3s ease 0.1s;
}

.quiz-overlay.visible .nfa-spotlight {
  transform: scale(1) translateX(0);
}

.nfa-spotlight h4 {
  margin: 0 0 15px 0;
  color: #2c3e50;
  font-size: 18px;
  text-align: center;
  border-bottom: 2px solid #3498db;
  padding-bottom: 8px;
}

.nfa-spotlight-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.nfa-mini-canvas {
  width: 100%;
  height: 300px;
  border: 2px solid #e1e8ed;
  border-radius: 12px;
  background: #fafbfc;
  margin-bottom: 15px;
  display: block;
}

.state-info {
  background: rgba(52, 152, 219, 0.1);
  border: 1px solid rgba(52, 152, 219, 0.3);
  border-radius: 8px;
  padding: 12px;
  width: 100%;
  font-size: 14px;
}

.state-info h5 {
  margin: 0 0 8px 0;
  color: #2980b9;
  font-size: 16px;
}

.state-info .info-item {
  margin: 4px 0;
  color: #34495e;
}

.state-info .info-item strong {
  color: #2c3e50;
}

/* Quiz modal */
.quiz-modal {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  padding: 24px;
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transform: scale(0.9) translateY(-20px);
  transition: all 0.3s ease 0.2s;
}

.quiz-overlay.visible .quiz-modal {
  transform: scale(1) translateY(0);
}

/* Quiz header */
.quiz-header {
  text-align: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid #e5e7eb;
}

.quiz-header h3 {
  font-size: 1.4rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.quiz-icon {
  font-size: 1.6rem;
}

.quiz-subtitle {
  font-size: 0.9rem;
  color: #6b7280;
  margin-bottom: 12px;
}

/* Quiz progress */
.quiz-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #4b5563;
}

.quiz-score {
  background: rgba(16, 185, 129, 0.1);
  color: #065f46;
  padding: 4px 8px;
  border-radius: 12px;
  font-weight: 600;
}

/* Quiz question */
.quiz-question {
  margin: 20px 0;
}

.quiz-question h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 12px;
}

.elimination-context {
  background: rgba(239, 246, 255, 0.8);
  border: 1px solid #93c5fd;
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 16px;
}

.elimination-context h5 {
  font-size: 0.9rem;
  font-weight: 600;
  color: #1e40af;
  margin-bottom: 8px;
}

.context-item {
  font-size: 0.85rem;
  color: #374151;
  margin-bottom: 4px;
  font-family: 'Courier New', monospace;
}

.context-item strong {
  color: #1f2937;
}

/* Quiz options */
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 20px 0;
}

.quiz-option {
  background: rgba(249, 250, 251, 0.8);
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  padding: 12px 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
}

.quiz-option:hover {
  background: rgba(219, 234, 254, 0.8);
  border-color: #3b82f6;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.quiz-option.selected {
  background: rgba(219, 234, 254, 0.9);
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.quiz-option.correct {
  background: rgba(220, 252, 231, 0.9);
  border-color: #10b981;
  color: #065f46;
}

.quiz-option.incorrect {
  background: rgba(254, 226, 226, 0.9);
  border-color: #ef4444;
  color: #991b1b;
}

.quiz-option.disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.option-letter {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #6b7280;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.quiz-option.selected .option-letter {
  background: #3b82f6;
}

.quiz-option.correct .option-letter {
  background: #10b981;
}

.quiz-option.incorrect .option-letter {
  background: #ef4444;
}

.option-text {
  font-family: 'Courier New', monospace;
  font-size: 1rem;
  font-weight: 500;
  flex-grow: 1;
}

.option-feedback {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.quiz-option.correct .option-feedback,
.quiz-option.incorrect .option-feedback {
  opacity: 1;
}

/* Quiz actions */
.quiz-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid #e5e7eb;
}

.quiz-hint {
  font-size: 0.85rem;
  color: #6b7280;
  max-width: 60%;
}

.quiz-buttons {
  display: flex;
  gap: 8px;
}

.quiz-btn {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.quiz-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.quiz-btn.primary {
  background: #3b82f6;
  color: white;
}

.quiz-btn.primary:hover:not(:disabled) {
  background: #2563eb;
  transform: translateY(-1px);
}

.quiz-btn.secondary {
  background: #f3f4f6;
  color: #374151;
  border: 1px solid #d1d5db;
}

.quiz-btn.secondary:hover:not(:disabled) {
  background: #e5e7eb;
  transform: translateY(-1px);
}

.quiz-btn.success {
  background: #10b981;
  color: white;
}

.quiz-btn.success:hover:not(:disabled) {
  background: #059669;
  transform: translateY(-1px);
}

/* Quiz feedback */
.quiz-feedback {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.quiz-feedback.visible {
  opacity: 1;
  transform: translateY(0);
}

.quiz-feedback.correct {
  background: rgba(220, 252, 231, 0.8);
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.quiz-feedback.incorrect {
  background: rgba(254, 226, 226, 0.8);
  color: #991b1b;
  border: 1px solid #fca5a5;
}

.feedback-title {
  font-weight: 600;
  margin-bottom: 4px;
}

.feedback-explanation {
  font-size: 0.85rem;
  line-height: 1.4;
}

/* Quiz statistics */
.quiz-stats {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 16px;
  padding: 12px;
  background: rgba(243, 244, 246, 0.5);
  border-radius: 8px;
  font-size: 0.85rem;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-weight: 600;
  font-size: 1.1rem;
  color: #1f2937;
}

.stat-label {
  color: #6b7280;
  font-size: 0.75rem;
}

/* Quiz settings */
.quiz-settings {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 999;
}

.quiz-settings-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #4f46e5;
  color: white;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.quiz-settings-btn:hover {
  background: #4338ca;
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.4);
}

.quiz-settings-panel {
  position: absolute;
  bottom: 60px;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 16px;
  min-width: 200px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s ease;
}

.quiz-settings-panel.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Responsive design for quiz with NFA spotlight */
@media (max-width: 1024px) {
  .quiz-container {
    flex-direction: column;
    gap: 20px;
    width: 95%;
  }
  
  .nfa-spotlight {
    min-width: auto;
    max-width: 600px;
    width: 100%;
    transform: scale(0.9) translateY(-20px);
  }
  
  .quiz-overlay.visible .nfa-spotlight {
    transform: scale(1) translateY(0);
  }
  
  .nfa-mini-canvas {
    height: 250px;
  }
}

@media (max-width: 768px) {
  .quiz-container {
    width: 98%;
    gap: 15px;
  }
  
  .nfa-spotlight {
    padding: 15px;
  }
  
  .nfa-mini-canvas {
    height: 180px;
  }
  
  .quiz-modal {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .quiz-container {
    gap: 10px;
  }
  
  .nfa-spotlight {
    padding: 12px;
  }
  
  .nfa-mini-canvas {
    height: 150px;
  }
  
  .quiz-modal {
    padding: 16px;
  }
}
.settings-item {
  margin-bottom: 12px;
}

.settings-item:last-child {
  margin-bottom: 0;
}

.settings-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: #374151;
  margin-bottom: 4px;
  display: block;
}

.settings-input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  font-size: 0.85rem;
}

.settings-input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Responsive design */
@media (max-width: 768px) {
  .quiz-modal {
    width: 95%;
    padding: 20px;
    margin: 10px;
  }
  
  .quiz-actions {
    flex-direction: column;
    gap: 12px;
  }
  
  .quiz-hint {
    max-width: 100%;
    text-align: center;
  }
  
  .quiz-settings {
    bottom: 10px;
    right: 10px;
  }
  
  .quiz-settings-panel {
    right: -8px;
    min-width: 180px;
  }
}

/* Animation for quiz appearance */
@keyframes quizSlideIn {
  from {
    opacity: 0;
    transform: scale(0.8) translateY(-30px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.quiz-modal.animate-in {
  animation: quizSlideIn 0.4s ease-out;
}