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ease;text-decoration:none;display:inline-block;text-align:center;min-width:160px}.quiz-btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;box-shadow:0 4px 15px #667eea66}.quiz-btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px #667eea99}.quiz-btn-secondary{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff;box-shadow:0 4px 15px #4caf5066}.quiz-btn-secondary:hover{transform:translateY(-2px);box-shadow:0 8px 25px #4caf5099}.quiz-countdown{font-size:.9rem;color:#888;margin-top:20px}.quiz-card{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:20px;padding:30px;box-shadow:0 20px 40px #0000001a;border:1px solid rgba(255,255,255,.2);margin-bottom:30px}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:20px;border-bottom:2px solid #f0f0f0;flex-wrap:wrap;gap:15px}.quiz-question-counter{flex:1;min-width:200px}.quiz-question-number{font-size:1.2rem;font-weight:600;color:#333;margin-bottom:5px}.quiz-question-progress{font-size:.9rem;color:#666}.quiz-timer{position:relative;font-size:1.8rem;font-weight:700;padding:15px 25px;border-radius:15px;min-width:120px;text-align:center;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;box-shadow:0 4px 15px #667eea4d}.quiz-timer.timer-green{background:linear-gradient(135deg,#4caf50,#45a049);box-shadow:0 4px 15px #4caf504d}.quiz-timer.timer-yellow{background:linear-gradient(135deg,#ff9800,#f57c00);box-shadow:0 4px 15px #ff98004d}.quiz-timer.timer-red{background:linear-gradient(135deg,#f44336,#d32f2f);box-shadow:0 4px 15px #f443364d}.timer-bar{position:absolute;bottom:0;left:0;height:4px;background:#fffc;border-radius:0 0 15px 15px;transition:width 1s linear}.quiz-question{background:linear-gradient(135deg,#fff,#fff);padding:25px 30px;border-radius:15px;margin-bottom:30px;border-left:5px solid #667eea;box-shadow:inset 0 2px 10px #0000000d}.quiz-question-text{font-size:1.3rem;font-weight:600;color:#000;line-height:1.6;margin:0;word-wrap:break-word}.quiz-options{display:flex;flex-direction:column;gap:15px;margin-bottom:30px}.quiz-option{padding:18px 25px;border:2px solid #e1e8ed;border-radius:15px;background:#fff;cursor:pointer;transition:all .3s ease;font-size:1rem;font-weight:500;text-align:left;display:flex;align-items:flex-start;gap:15px;box-shadow:0 2px 8px #0000000d;position:relative;overflow:hidden}.quiz-option:before{content:"";position:absolute;top:0;left:0;width:0;height:100%;background:linear-gradient(135deg,#667eea,#764ba2);transition:width .3s ease;z-index:1}.quiz-option:hover:not(.disabled){border-color:#667eea;transform:translateY(-2px);box-shadow:0 8px 25px #667eea33}.quiz-option:hover:not(.disabled):before{width:5px}.quiz-option.selected{border-color:#667eea;background:linear-gradient(135deg,#f8f9ff,#e8f2ff);transform:translateY(-2px);box-shadow:0 8px 25px #667eea4d}.quiz-option.selected:before{width:5px}.quiz-option.disabled{cursor:not-allowed;opacity:.6;background:#f8f9fa}.quiz-option.locked{border-color:#4caf50;background:linear-gradient(135deg,#e8f5e9,#c8e6c9);cursor:not-allowed;opacity:1}.quiz-option-lock{font-size:.85rem;color:#4caf50;font-weight:600;margin-left:auto;z-index:2;position:relative}.quiz-option-letter{font-weight:700;color:#667eea;font-size:1.2rem;flex-shrink:0;z-index:2;position:relative}.quiz-option-text{flex:1;z-index:2;position:relative;word-wrap:break-word}.quiz-progress-section{background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:15px;padding:25px;box-shadow:0 10px 30px #0000001a;border:1px solid rgba(255,255,255,.2)}.quiz-progress-bar{width:100%;height:12px;background:#e1e8ed;border-radius:10px;overflow:hidden;margin-bottom:15px;box-shadow:inset 0 2px 4px #0000001a}.quiz-progress-fill{height:100%;background:linear-gradient(90deg,#667eea,#764ba2);border-radius:10px;transition:width .5s ease;box-shadow:0 0 10px #667eea80}.quiz-progress-text{text-align:center;font-size:.95rem;font-weight:600;color:#666}.quiz-completion{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:20px;padding:40px 30px;text-align:center;box-shadow:0 20px 40px #0000001a;border:1px solid rgba(255,255,255,.2);max-width:500px;margin:0 auto}.quiz-completion-icon{font-size:4rem;margin-bottom:20px;display:block}.quiz-completion-title{font-size:2.2rem;font-weight:700;color:#1a1a1a;margin-bottom:30px}.quiz-score-card{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:30px;border-radius:15px;margin-bottom:25px;box-shadow:0 10px 30px #667eea4d}.quiz-score-label{font-size:1.1rem;font-weight:600;margin-bottom:10px;opacity:.9}.quiz-score-value{font-size:3.5rem;font-weight:700;margin:10px 0;text-shadow:0 2px 10px rgba(0,0,0,.2)}.quiz-score-total{font-size:1rem;opacity:.8}.quiz-completion-message{font-size:1rem;color:#666;font-style:italic}.quiz-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;color:#fff}.quiz-loading-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-loading-text{font-size:1.2rem;font-weight:600}.quiz-waiting{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:20px;padding:40px 30px;text-align:center;box-shadow:0 20px 40px #0000001a;border:1px solid rgba(255,255,255,.2)}.quiz-waiting-icon{font-size:3rem;margin-bottom:20px;display:block}.quiz-waiting-title{font-size:1.8rem;font-weight:700;color:#1a1a1a;margin-bottom:15px}.quiz-waiting-text{font-size:1rem;color:#666;line-height:1.6;margin-bottom:30px}.quiz-countdown-display{display:flex;justify-content:center;align-items:center;gap:10px;margin-top:30px;font-family:Courier New,monospace}.countdown-block{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:12px;padding:20px 15px;min-width:80px;box-shadow:0 8px 24px #667eea4d}.countdown-number{font-size:2.5rem;font-weight:700;color:#fff;line-height:1}.countdown-label{font-size:.75rem;color:#fffc;text-transform:uppercase;letter-spacing:1px;margin-top:8px}.countdown-separator{font-size:2rem;font-weight:700;color:#667eea;margin:0 5px}@media(max-width:768px){.quiz-container{padding:15px 10px 100px}.quiz-card{padding:20px;margin-bottom:20px}.quiz-header{flex-direction:column;align-items:stretch;gap:20px}.quiz-timer{font-size:1.5rem;padding:12px 20px;min-width:100px}.quiz-question{padding:20px}.quiz-question-text{font-size:1.1rem}.quiz-option{padding:15px 20px;font-size:.95rem}.quiz-option-letter{font-size:1.1rem}.quiz-progress-section{padding:20px}.quiz-completion{padding:30px 20px}.quiz-score-value{font-size:2.8rem}.quiz-action-buttons{flex-direction:column;align-items:center}.quiz-btn-primary,.quiz-btn-secondary{width:100%;max-width:300px}}@media(max-width:480px){.quiz-container{padding:10px 8px 90px}.quiz-card{padding:15px}.quiz-timer{font-size:1.3rem;padding:10px 15px}.quiz-question{padding:15px}.quiz-question-text{font-size:1rem}.quiz-option{padding:12px 15px;font-size:.9rem;gap:10px}.quiz-option-letter{font-size:1rem}.quiz-progress-section{padding:15px}.quiz-completion{padding:25px 15px}.quiz-score-card{padding:20px}.quiz-score-value{font-size:2.2rem}.quiz-status-message{padding:30px 20px}.quiz-status-title{font-size:1.6rem}.quiz-waiting{padding:30px 20px}}body.dark .quiz-container{background:#222}body.dark .quiz-card,body.dark .quiz-status-message,body.dark .quiz-completion,body.dark .quiz-waiting,body.dark .quiz-progress-section{background:#600;border-color:#ffffff1a}body.dark .calendar-display,body.dark .countdown-block{background:linear-gradient(135deg,#764ba2,#667eea);box-shadow:0 8px 24px #764ba24d}body.dark .countdown-separator{color:#764ba2}body.dark .quiz-question-number,body.dark .quiz-status-title,body.dark .quiz-completion-title,body.dark .quiz-waiting-title{color:#ecf0f1}body.dark .quiz-status-description,body.dark .quiz-waiting-text,body.dark .quiz-completion-message,body.dark .quiz-progress-text{color:#bdc3c7}body.dark .quiz-question-text{color:#000}body.dark .quiz-option{background:#fffc;border-color:#fff3}body.dark .quiz-option:hover:not(.disabled){border-color:#667eea;background:#34495ee6}body.dark .quiz-option.selected{background:linear-gradient(135deg,#667eea33,#764ba233)}body.dark .quiz-progress-bar{background:#ffffff1a}@media(prefers-reduced-motion:reduce){.quiz-option,.quiz-btn-primary,.quiz-btn-secondary{transition:none}.quiz-option:hover{transform:none}.timer-bar,.quiz-progress-fill{transition:none}}