/* Quiz styles - scoped under .quiz */

.quiz {
  margin-top: var(--spacing-xl);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-md);
}

.quiz h2 {
  font-size: 1.2rem;
  color: var(--accent-primary);
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
}

/* Progress bar */
.quiz-progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: var(--spacing-md);
}

.quiz-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--accent-primary);
  border-radius: 2px;
  transition: width 0.15s ease;
  width: 0%;
}

.quiz-progress-text {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  white-space: nowrap;
}

/* Question fieldsets - hidden by default, shown when active */
.quiz-question {
  border: none;
  padding: 0;
  margin: 0;
  display: none;
}

.quiz-question.quiz-active {
  display: block;
}

.quiz-question legend {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.quiz-hint {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  font-style: italic;
  margin: 0 0 0.25rem 0;
}

/* Option labels */
.quiz-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1.5;
  transition: background 0.15s;
}

.quiz-option:hover {
  background: var(--bg-tertiary);
}

.quiz-option input[type="radio"],
.quiz-option input[type="checkbox"] {
  accent-color: var(--accent-primary);
  margin: 0;
  flex-shrink: 0;
}

.quiz-option input:disabled {
  cursor: default;
}

.quiz-option:has(input:disabled) {
  cursor: default;
}

/* Navigation */
.quiz-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: var(--spacing-md);
}

.quiz-prev,
.quiz-next {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.quiz-prev:hover:not(:disabled),
.quiz-next:hover:not(:disabled) {
  background: var(--border-color);
  border-color: var(--text-tertiary);
}

.quiz-prev:disabled,
.quiz-next:disabled {
  opacity: 0.4;
  cursor: default;
}

.quiz-submit {
  background: var(--accent-primary);
  color: var(--bg-primary);
  border: none;
  border-radius: 6px;
  padding: 0.4rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.quiz-submit:hover:not(:disabled) {
  background: var(--accent-hover);
}

.quiz-submit:disabled {
  opacity: 0.6;
  cursor: default;
}

/* Per-question feedback */
.quiz-option.quiz-wrong {
  background: rgba(248, 81, 73, 0.15);
}

.quiz-option.quiz-correct-hint {
  background: rgba(63, 185, 80, 0.25);
}

/* Explanation shown on wrong answer */
.quiz-explanation {
  margin: 0.75rem 0 0;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(248, 81, 73, 0.08);
  border-left: 3px solid rgba(248, 81, 73, 0.4);
  border-radius: 0 4px 4px 0;
  line-height: 1.5;
}

/* Correct answer pulse */
@keyframes quiz-correct-pulse {
  0% { background: transparent; }
  30% { background: rgba(63, 185, 80, 0.12); }
  100% { background: transparent; }
}

.quiz-correct-pulse {
  animation: quiz-correct-pulse 0.3s ease;
}

/* Jiggle animation for advance button on wrong answer */
@keyframes quiz-jiggle {
  0%, 100% { transform: translateX(0); }
  15% { transform: translateX(-4px); }
  30% { transform: translateX(4px); }
  45% { transform: translateX(-3px); }
  60% { transform: translateX(3px); }
  75% { transform: translateX(-1px); }
  90% { transform: translateX(1px); }
}

.quiz-jiggle {
  animation: quiz-jiggle 0.2s ease;
}

/* Results */
.quiz-results:empty {
  display: none;
}

.quiz-results-warning {
  margin-top: var(--spacing-sm);
  color: #d29922;
  font-size: 0.9rem;
}

.quiz-results-done {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.quiz-checkmark {
  font-size: 3rem;
  color: #3fb950;
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.quiz-done {
  display: block;
  font-size: 1.1rem;
  color: #3fb950;
}

.quiz-checkmark-partial {
  color: #d29922;
}

.quiz-done-partial {
  color: #d29922;
}

/* Reset button */
.quiz-reset {
  display: block;
  margin-left: auto;
  margin-top: var(--spacing-xs);
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  transition: color 0.15s;
}

.quiz-reset:hover {
  color: var(--text-secondary);
}

/* Mobile */
@media (max-width: 768px) {
  .quiz {
    padding: var(--spacing-sm);
  }

  .quiz-option {
    padding: 0.4rem 0.5rem;
  }
}