/* Quiz page styles — shared across all quiz pages */
.quiz-container { background: white; border-radius: 12px; padding: 2rem; box-shadow: 0 2px 8px rgba(0,0,0,0.08); margin-bottom: 2rem; }
.quiz-header { text-align: center; margin-bottom: 2rem; }
.quiz-header h2 { color: #333; margin-bottom: 0.5rem; }
.quiz-stats { display: flex; justify-content: center; gap: 2rem; flex-wrap: wrap; margin-top: 1rem; }
.stat-box { background: #f8f9fa; padding: 1rem 1.5rem; border-radius: 8px; text-align: center; }
.stat-value { font-size: 1.5rem; font-weight: 700; color: #667eea; }
.stat-label { font-size: 0.85rem; color: #666; }
.progress-section { margin-bottom: 2rem; }
.progress-bar { background: #e0e0e0; height: 10px; border-radius: 5px; overflow: hidden; }
.progress-fill { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); height: 100%; transition: width 0.3s ease; }
.progress-text { text-align: center; margin-top: 0.5rem; color: #666; font-size: 0.9rem; }
.category-select { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; margin-bottom: 2rem; }
.category-btn { padding: 0.5rem 1rem; border: 2px solid #667eea; background: white; color: #667eea; border-radius: 20px; cursor: pointer; font-weight: 500; transition: all 0.2s; }
.category-btn:hover, .category-btn.active { background: #667eea; color: white; }
.question-card { background: #f8f9fa; border-radius: 12px; padding: 2rem; margin-bottom: 1.5rem; }
.question-number { display: inline-block; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 0.25rem 0.75rem; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 1rem; }
.question-category { display: inline-block; background: #e7f3ff; color: #667eea; padding: 0.25rem 0.75rem; border-radius: 20px; font-size: 0.8rem; margin-left: 0.5rem; }
.question-text { font-size: 1.1rem; color: #333; margin-bottom: 1.5rem; line-height: 1.6; }
.options-list { display: flex; flex-direction: column; gap: 0.75rem; }
.option { padding: 1rem 1.25rem; background: white; border: 2px solid #e0e0e0; border-radius: 8px; cursor: pointer; transition: all 0.2s; display: flex; align-items: center; gap: 0.75rem; }
.option:hover:not(.disabled) { border-color: #667eea; background: #f0f4ff; }
.option.selected { border-color: #667eea; background: #e7f3ff; }
.option.correct { border-color: #28a745; background: #d4edda; }
.option.incorrect { border-color: #dc3545; background: #f8d7da; }
.option.disabled { cursor: default; }
.option-letter { background: #e0e0e0; color: #666; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 0.9rem; flex-shrink: 0; }
.option.selected .option-letter { background: #667eea; color: white; }
.option.correct .option-letter { background: #28a745; color: white; }
.option.incorrect .option-letter { background: #dc3545; color: white; }
.explanation { background: #e7f3ff; border-left: 4px solid #667eea; padding: 1rem; margin-top: 1rem; border-radius: 0 8px 8px 0; display: none; }
.explanation.show { display: block; }
.explanation h4 { color: #667eea; margin-bottom: 0.5rem; }
.explanation p { color: #555; line-height: 1.6; }
.explanation a { color: #667eea; font-weight: 600; }
.quiz-actions { display: flex; justify-content: center; gap: 1rem; margin-top: 2rem; }
.btn { padding: 0.75rem 2rem; border: none; border-radius: 8px; font-weight: 600; cursor: pointer; transition: all 0.2s; }
.btn-primary { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4); }
.btn-secondary { background: #f8f9fa; color: #667eea; border: 2px solid #667eea; }
.btn-secondary:hover { background: #667eea; color: white; }
.results-card { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; border-radius: 12px; padding: 3rem 2rem; text-align: center; display: none; }
.results-card.show { display: block; }
.results-score { font-size: 4rem; font-weight: 700; margin-bottom: 0.5rem; }
.results-grade { font-size: 1.5rem; margin-bottom: 1rem; opacity: 0.95; }
.results-breakdown { display: flex; justify-content: center; gap: 2rem; margin: 2rem 0; flex-wrap: wrap; }
.breakdown-item { background: rgba(255,255,255,0.2); padding: 1rem 1.5rem; border-radius: 8px; }
.breakdown-value { font-size: 1.5rem; font-weight: 700; }
.breakdown-label { font-size: 0.85rem; opacity: 0.9; }
.share-section { margin-top: 2rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.3); }
.share-buttons { display: flex; justify-content: center; gap: 1rem; margin-top: 1rem; flex-wrap: wrap; }
.share-btn { padding: 0.5rem 1rem; border-radius: 6px; text-decoration: none; font-weight: 600; font-size: 0.9rem; display: flex; align-items: center; gap: 0.5rem; }
.share-twitter { background: #1DA1F2; color: white; }
.share-linkedin { background: #0077B5; color: white; }
.start-screen { text-align: center; padding: 3rem; }
.start-screen h2 { margin-bottom: 1rem; }
.start-screen p { color: #666; margin-bottom: 2rem; max-width: 600px; margin-left: auto; margin-right: auto; }
.difficulty-select { display: flex; justify-content: center; gap: 1rem; margin-bottom: 2rem; flex-wrap: wrap; }
.difficulty-btn { padding: 1rem 2rem; border: 2px solid #e0e0e0; background: white; border-radius: 8px; cursor: pointer; transition: all 0.2s; }
.difficulty-btn:hover, .difficulty-btn.active { border-color: #667eea; background: #f0f4ff; }
.difficulty-btn h4 { margin: 0 0 0.25rem 0; color: #333; }
.difficulty-btn p { margin: 0; font-size: 0.85rem; color: #666; }
.timer { font-size: 1.2rem; font-weight: 600; color: #667eea; }
.timer.warning { color: #dc3545; }
@media (max-width: 768px) {
    .quiz-stats { gap: 1rem; }
    .results-breakdown { gap: 1rem; }
    .quiz-container { padding: 1.25rem; }
    .question-card { padding: 1.25rem; }
    .results-card { padding: 2rem 1.25rem; }
    .option { padding: 0.85rem 1rem; }
}
/* SEO question preview — visible to crawlers, hidden by JS on interactive load */
.seo-questions { margin-top: 2rem; padding: 1.5rem; background: var(--bg-secondary, #f8f9fa); border-radius: 12px; border: 1px solid var(--border-color, #e0e0e0); }
.seo-questions h3 { color: var(--text-primary, #333); margin-bottom: 1rem; font-size: 1.1rem; }
.seo-questions details { margin-bottom: 0.75rem; border-bottom: 1px solid var(--border-color, #e0e0e0); padding-bottom: 0.75rem; }
.seo-questions details:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.seo-questions summary { cursor: pointer; font-weight: 600; color: var(--text-primary, #333); padding: 0.5rem 0; line-height: 1.5; }
.seo-questions summary:hover { color: #667eea; }
.seo-questions details p { margin: 0.5rem 0 0.25rem 1rem; color: var(--text-secondary, #666); line-height: 1.6; font-size: 0.95rem; }
@media (max-width: 480px) {
    .quiz-container { padding: 1rem; }
    .question-card { padding: 1rem; }
    .question-text { font-size: 1rem; }
    .results-score { font-size: 3rem; }
    .results-grade { font-size: 1.2rem; }
    .stat-box { padding: 0.75rem 1rem; }
    .stat-value { font-size: 1.25rem; }
    .difficulty-btn { padding: 0.75rem 1.25rem; }
}