/* ===== QUIZ ===== */
.quiz-container {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.quiz-intro {
  padding: 20px;
  background: rgba(139, 92, 246, 0.06);
  border: 1px solid rgba(139, 92, 246, 0.12);
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  font-style: italic;
}
.quiz-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.quiz-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--border-default);
  border-radius: 2px;
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

/* Question */
.quiz-question {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 4px;
}
.quiz-difficulty {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}
.quiz-difficulty.beginner { background: rgba(16, 185, 129, 0.12); color: #10B981; }
.quiz-difficulty.intermediate { background: rgba(245, 158, 11, 0.12); color: #F59E0B; }
.quiz-difficulty.advanced { background: rgba(239, 68, 68, 0.12); color: #EF4444; }

/* Options */
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  text-align: left;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  transition: all var(--transition-normal);
}
.quiz-option:hover:not(.disabled) {
  border-color: var(--primary);
  background: var(--gradient-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-sm);
  color: var(--text-primary);
}
.quiz-option .option-letter {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8rem;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary-light);
  border: 1px solid rgba(139, 92, 246, 0.2);
  transition: all var(--transition-fast);
}
.quiz-option:hover:not(.disabled) .option-letter {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Selected states */
.quiz-option.correct {
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.08);
  color: var(--text-primary);
}
.quiz-option.correct .option-letter {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}
.quiz-option.incorrect {
  border-color: var(--error);
  background: rgba(239, 68, 68, 0.08);
  color: var(--text-muted);
}
.quiz-option.incorrect .option-letter {
  background: var(--error);
  border-color: var(--error);
  color: #fff;
}
.quiz-option.disabled {
  cursor: default;
  opacity: 0.6;
}
.quiz-option.correct.disabled,
.quiz-option.incorrect.disabled { opacity: 1; }

/* Explanation */
.quiz-explanation {
  padding: 16px 18px;
  background: rgba(6, 182, 212, 0.06);
  border: 1px solid rgba(6, 182, 212, 0.15);
  border-radius: var(--radius-lg);
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  animation: msgIn 0.3s ease;
}
.quiz-explanation strong { color: var(--text-primary); }

/* Next button */
.quiz-next-btn {
  align-self: flex-end;
  padding: 10px 24px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-display);
  color: #fff;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}
.quiz-next-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-sm);
}

/* Completion */
.quiz-complete {
  text-align: center;
  padding: 32px 20px;
}
.quiz-score-big {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.quiz-score-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.quiz-retry-btn {
  padding: 10px 24px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-light);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}
.quiz-retry-btn:hover {
  border-color: var(--primary);
  background: rgba(139, 92, 246, 0.1);
}