.quiz-container{max-width:800px;margin:0 auto;padding:20px;font-family:Arial,sans-serif}.quiz-question{background:#fff;padding:25px;border:1px solid #ddd;border-radius:8px;box-shadow:0 2px 4px rgb(0 0 0/.1)}.quiz-question h3{color:#2c3e50;border-bottom:2px solid #3498db;padding-bottom:10px;margin-bottom:20px}.question-image{max-width:100%;height:auto;margin:15px 0;border-radius:5px}.question-text{font-size:16px;line-height:1.6;margin-bottom:20px;color:#333}.quiz-options{margin:20px 0}.quiz-option{display:block;margin:12px 0;padding:12px 15px;border:2px solid #ecf0f1;border-radius:6px;cursor:pointer;transition:all .3s ease}.quiz-option:hover{background-color:#f8f9fa;border-color:#3498db}.quiz-option input[type=radio]{margin-right:12px}.submit-quiz{background:#27ae60;color:#fff;padding:12px 25px;font-size:16px}.submit-quiz:hover{background:#229954}.quiz-results{background:#f8f9fa;padding:25px;border-radius:8px;margin-top:20px}@media (max-width:768px){.quiz-container{padding:10px}.quiz-question{padding:15px}}.quiz-sets-navigation{background:#f8f9fa;border:2px solid #dee2e6;border-radius:8px;padding:20px;margin:20px 0;box-shadow:0 2px 4px rgb(0 0 0/.1)}.sets-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.sets-header h3{margin:0;color:#495057;font-size:1.3em}.toggle-sets-btn{background:#007cba;color:#fff;border:0;padding:8px 15px;border-radius:5px;cursor:pointer;font-weight:700;transition:background .3s ease}.toggle-sets-btn:hover{background:#005a87}.sets-loading{text-align:center;color:#6c757d;padding:20px;font-style:italic}.sets-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:15px;margin-top:15px}@media (max-width:768px){.sets-header{flex-direction:column;text-align:center}.sets-header h3{margin-bottom:10px}.sets-grid{grid-template-columns:1fr}}.sets-container{overflow:hidden;transition:max-height .3s ease}