.quiz-popup{display:none;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);width:90%;max-width:650px;max-height:90vh;background:linear-gradient(to bottom,#ffffff,#f5f5f5);border-radius:16px;box-shadow:0 25px 80px rgba(0,0,0,0.35);z-index:1000;overflow:scroll;animation:slideIn 0.4s ease-out}.quiz-popup.active{display:block}@keyframes slideIn{from{transform:translate(-50%,-50%) scale(0.9);opacity:0}to{transform:translate(-50%,-50%) scale(1);opacity:1}}.quiz-header{background:linear-gradient(135deg,#ef7f1b,#be6618);padding:25px 30px;color:white;position:relative}.close-btn{position:absolute;top:28px;right:47px;background:rgba(255,255,255,0.2);border:none;color:black;width:32px;height:32px;border-radius:50%;cursor:pointer;font-size:20px;transition:all 0.2s}.close-btn:hover{background:rgba(255,255,255,0.3);transform:rotate(90deg)}.quiz-title{font-size:24px;font-weight:600;margin-bottom:8px}.quiz-subtitle{font-size:14px;opacity:0.9}.progress-bar{height:6px;background:rgba(255,255,255,0.3);margin-top:15px;border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:#27ae60;width:0%;transition:width 0.3s ease}.quiz-body{padding:30px;overflow-y:auto}.question-counter{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding:15px;background:#f8f9fa;border-radius:8px}.question-number{font-size:14px;color:#7f8c8d;font-weight:600}.question-score{font-size:14px;color:#27ae60;font-weight:600}.question-text{font-size:18px;color:#2c3e50;font-weight:600;margin-bottom:25px;line-height:1.6}.options-container{display:flex;flex-direction:column;gap:12px}.option-btn{background:white;border:2px solid #dee2e6;padding:16px 20px;border-radius:10px;font-size:16px;color:#2c3e50;cursor:pointer;transition:all 0.2s;text-align:left;position:relative;overflow:hidden}.option-btn::before{content:'';position:absolute;left:0;top:0;height:100%;width:4px;background:#ef7f1b;transform:scaleY(0);transition:transform 0.2s}.option-btn:hover{border-color:#ef7f1b;background:#f8f9fa;transform:translateX(4px)}.option-btn:hover::before{transform:scaleY(1)}.option-btn.selected{border-color:#ef7f1b;background:#ffd5af;font-weight:600}.option-btn.selected::before{transform:scaleY(1)}.option-btn.correct{border-color:#27ae60;background:#d4edda;color:#155724}.option-btn.wrong{border-color:#e74c3c;background:#f8d7da;color:#721c24}.option-btn:disabled{cursor:not-allowed;opacity:0.7}.quiz-footer{padding:20px 30px;background:#f8f9fa;border-top:1px solid #dee2e6;display:flex;justify-content:space-between;align-items:center}.btn-next{background:linear-gradient(to bottom,#ef7f1b,#be6618);color:white;border:none;padding:12px 30px;font-size:16px;font-weight:600;border-radius:8px;cursor:pointer;transition:all 0.2s;text-transform:uppercase;letter-spacing:0.5px}.btn-next:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px rgba(52,152,219,0.4)}.btn-next:disabled{opacity:0.5;cursor:not-allowed}.btn-submit{background:linear-gradient(to bottom,#27ae60,#229954)}.btn-submit:hover:not(:disabled){box-shadow:0 4px 12px rgba(39,174,96,0.4)}.results-screen{display:none;text-align:center;padding:40px 30px}.results-screen.active{display:block}.result-icon{width:100px;height:100px;margin:0 auto 25px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:50px;animation:scaleIn 0.5s ease-out}@keyframes scaleIn{from{transform:scale(0) rotate(-180deg)}to{transform:scale(1) rotate(0)}}.result-icon.pass{background:linear-gradient(135deg,#27ae60,#2ecc71)}.result-icon.fail{background:linear-gradient(135deg,#e74c3c,#c0392b)}.result-title{font-size:28px;color:#2c3e50;font-weight:700;margin-bottom:15px}.result-score{font-size:48px;font-weight:700;margin:20px 0}.result-score.pass{color:#27ae60}.result-score.fail{color:#e74c3c}.coins-earned{background:linear-gradient(135deg,#f39c12,#e67e22);color:white;padding:20px;border-radius:12px;margin:25px 0;font-size:24px;font-weight:600;cursor:pointer}.result-message{color:#7f8c8d;font-size:16px;margin-bottom:30px;line-height:1.6}.result-actions{display:flex;gap:15px;justify-content:center}.btn-retry{background:linear-gradient(to bottom,#ef7f1b,#be6618);color:white;border:none;padding:14px 35px;font-size:16px;font-weight:600;border-radius:8px;cursor:pointer;transition:all 0.2s}.btn-close{background:white;color:#ef7f1b;border:2px solid #ef7f1b;padding:14px 35px;font-size:16px;font-weight:600;border-radius:8px;cursor:pointer;transition:all 0.2s}.loading-spinner{display:none;text-align:center;padding:40px}.loading-spinner.active{display:block}.spinner{border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite;margin:0 auto 20px}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}.answer-review{margin-top:30px;text-align:left}.review-title{font-size:18px;font-weight:600;color:#2c3e50;margin-bottom:20px}.review-item{background:#f8f9fa;padding:15px;border-radius:8px;margin-bottom:15px;border-left:4px solid #dee2e6}.review-item.correct{border-left-color:#27ae60;background:#d4edda}.review-item.incorrect{border-left-color:#e74c3c;background:#f8d7da}.review-question{font-size:14px;color:#2c3e50;font-weight:600;margin-bottom:10px}.review-answer{font-size:13px;color:#7f8c8d}.review-answer strong{color:#2c3e50}