:root{font-family:system-ui,Arial}.container{max-width:900px;margin:24px auto;padding:16px}.card{border:1px solid #eee;padding:16px;border-radius:8px;margin-bottom:16px}input,button{padding:8px;margin:6px 0}button{cursor:pointer}.table{width:100%;border-collapse:collapse}.table th,.table td{border:1px solid #ddd;padding:8px}.badge{padding:4px 8px;border-radius:999px;background:#eee}*{margin:0;padding:0;box-sizing:border-box}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.3);border-top:4px solid white;border-radius:50%;animation:spin 1s linear infinite;margin-bottom:20px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.quiz-start-modal{position:fixed;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;padding:20px}.quiz-start-card{background:#fff;border-radius:20px;padding:40px;max-width:500px;width:100%;box-shadow:0 20px 40px #0000001a;text-align:center}.quiz-header h1{color:#333;margin-bottom:30px;font-size:2rem}.quiz-info{display:flex;flex-direction:column;gap:20px;margin-bottom:30px}.info-item{display:flex;align-items:center;gap:15px;padding:15px;background:#f8f9fa;border-radius:10px;text-align:left}.info-icon{font-size:1.5rem}.name-input-container{margin-bottom:30px;text-align:left}.name-input-container label{display:block;margin-bottom:8px;font-weight:600;color:#333}.name-input{width:100%;padding:12px 16px;border:2px solid #e1e5e9;border-radius:10px;font-size:16px;transition:border-color .3s}.name-input:focus{outline:none;border-color:#667eea}.start-quiz-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:15px 40px;border-radius:50px;font-size:18px;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s}.start-quiz-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 10px 20px #667eea4d}.start-quiz-btn:disabled{background:#ccc;cursor:not-allowed;transform:none}.quiz-container{min-height:100vh;background:#f8f9fa}.quiz-header-sticky{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 2px 20px #0000001a;padding:15px 0}.header-content{max-width:1200px;margin:0 auto;padding:0 20px}.quiz-info-bar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}.info-section{display:flex;gap:30px;align-items:center}.user-info,.timer{font-weight:600;font-size:16px}.timer{color:#e74c3c}.time-warning{color:#e74c3c;font-weight:700;animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.progress-section{display:flex;align-items:center;gap:15px;min-width:200px}.progress-bar{flex:1;height:8px;background:#e1e5e9;border-radius:10px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#4caf50,#45a049);transition:width .3s ease}.progress-text{font-size:14px;font-weight:600;color:#666;min-width:80px}.questions-container{max-width:800px;margin:0 auto;padding:40px 20px}.quiz-title{text-align:center;color:#333;margin-bottom:40px;font-size:2.5rem}.question-card{background:#fff;border-radius:15px;padding:30px;margin-bottom:25px;box-shadow:0 5px 15px #00000014;border-left:5px solid #667eea;transition:transform .2s,box-shadow .2s}.question-card:hover{transform:translateY(-2px);box-shadow:0 8px 25px #0000001f}.question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.question-number{font-weight:600;color:#667eea;font-size:16px}.question-type{background:#667eea;color:#fff;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600}.question-text{color:#333;margin-bottom:20px;line-height:1.6;font-size:18px}.options-container{display:flex;flex-direction:column;gap:12px}.option-label{display:flex;align-items:center;gap:12px;padding:12px 16px;border:2px solid #e1e5e9;border-radius:10px;cursor:pointer;transition:all .3s}.option-label:hover{border-color:#667eea;background:#f8f9ff}.option-input{display:none}.option-input:checked+.custom-radio{background:#667eea;border-color:#667eea}.option-input:checked+.custom-radio:after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:8px;height:8px;background:#fff;border-radius:50%}.custom-radio{width:20px;height:20px;border:2px solid #ddd;border-radius:50%;position:relative;transition:all .3s}.text-answer-container{margin-top:10px}.text-answer{width:100%;padding:16px;border:2px solid #e1e5e9;border-radius:10px;font-size:16px;font-family:inherit;resize:vertical;transition:border-color .3s}.text-answer:focus{outline:none;border-color:#667eea}.answer-status{margin-top:15px}.answered-badge{color:#4caf50;font-weight:600;font-size:14px}.unanswered-badge{color:#e74c3c;font-weight:600;font-size:14px}.submit-section{position:sticky;bottom:0;background:#fff;padding:20px;box-shadow:0 -2px 20px #0000001a;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}.submit-btn{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;border:none;padding:15px 30px;border-radius:50px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s}.submit-btn:hover:not(.disabled){transform:translateY(-2px);box-shadow:0 10px 20px #4caf504d}.submit-btn.disabled{background:#ccc;cursor:not-allowed;transform:none}.time-remaining{font-size:16px;color:#666;font-weight:600}.submission-success{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;text-align:center;padding:20px}.success-icon{font-size:4rem;margin-bottom:20px}.submission-success h2{font-size:2.5rem;margin-bottom:15px}.submission-success p{font-size:1.2rem;margin-bottom:30px;opacity:.9}.home-button{background:#fff;color:#4caf50;border:none;padding:12px 30px;border-radius:50px;font-size:16px;font-weight:600;cursor:pointer;transition:transform .2s}.home-button:hover{transform:translateY(-2px)}.no-questions{text-align:center;padding:60px 20px;color:#666}@media (max-width: 768px){.quiz-start-card{padding:30px 20px}.quiz-info-bar{flex-direction:column;align-items:stretch;gap:15px}.info-section{justify-content:space-between}.submit-section{flex-direction:column;text-align:center}.questions-container{padding:20px 15px}.question-card{padding:20px}}