.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background:linear-gradient(135deg,var(--primary-color) 0%,var(--secondary-color) 100%);padding:2rem 0;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.app-header:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");opacity:.3}.app-title{font-size:3rem;font-weight:800;margin:0;text-align:center;color:#fff;text-shadow:2px 2px 4px rgba(0,0,0,.3);position:relative;z-index:1;display:flex;align-items:center;justify-content:center;gap:1rem}.title-icon{font-size:3.5rem;animation:pulse 2s ease-in-out infinite}.app-subtitle{text-align:center;color:#ffffffe6;font-size:1.2rem;margin-top:.5rem;position:relative;z-index:1}.app-main{flex:1;padding:3rem 0}.app-footer{background:var(--bg-secondary);padding:1.5rem 0;text-align:center;color:#fff;border-top:1px solid var(--border-color);margin-top:auto}.error-banner{background:linear-gradient(135deg,var(--error-color),#dc2626);color:#fff;padding:1rem 1.5rem;border-radius:12px;margin-bottom:2rem;display:flex;align-items:center;gap:1rem;box-shadow:var(--shadow-lg);position:relative}.error-icon{font-size:1.5rem}.error-close{position:absolute;right:1rem;top:50%;transform:translateY(-50%);background:#fff3;color:#fff;border:none;width:30px;height:30px;border-radius:50%;font-size:1.5rem;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s ease}.error-close:hover{background:#ffffff4d;transform:translateY(-50%) scale(1.1)}@media (max-width: 768px){.app-title{font-size:2rem}.title-icon{font-size:2.5rem}.app-subtitle{font-size:1rem}.app-header{padding:1.5rem 0}.app-main{padding:2rem 0}}@media (max-width: 480px){.app-title{font-size:1.5rem;flex-direction:column;gap:.5rem}.title-icon{font-size:2rem}.app-subtitle{font-size:.9rem}.error-banner{padding:.75rem 1rem;font-size:.9rem}}.quiz-selection{max-width:1200px;margin:0 auto}.selection-header{text-align:center;margin-bottom:4rem}.selection-title{font-size:3rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.selection-subtitle{font-size:1.2rem;color:var(--text-secondary)}.quiz-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:2rem}.quiz-card{background:linear-gradient(135deg,var(--bg-secondary) 0%,var(--bg-tertiary) 100%);border:2px solid var(--border-color);border-radius:20px;padding:3rem 2.5rem;transition:all .3s ease;display:flex;flex-direction:column;align-items:center;text-align:center;gap:1.5rem;position:relative;overflow:hidden;min-height:320px}.quiz-card:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));opacity:0;transition:opacity .3s ease}.quiz-card:hover:before{opacity:.08}.quiz-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl);border-color:var(--primary-color)}.quiz-card-icon{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;width:90px;height:90px;border-radius:20px;display:flex;align-items:center;justify-content:center;flex-shrink:0;position:relative;z-index:1;box-shadow:0 8px 16px #6366f14d}.quiz-card-content{flex:1;position:relative;z-index:1;width:100%}.quiz-card-title{font-size:1.4rem;font-weight:700;color:var(--text-primary);margin-bottom:.75rem;line-height:1.3;white-space:nowrap}.quiz-card-description{font-size:1rem;color:var(--text-secondary);line-height:1.6}.start-quiz-button{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;border:none;padding:1rem 2.5rem;border-radius:12px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease;position:relative;z-index:1;width:100%;max-width:250px;box-shadow:0 4px 12px #6366f14d}.start-quiz-button:hover{transform:translateY(-2px);box-shadow:0 8px 20px #6366f166}.start-quiz-button:active{transform:translateY(0)}.no-quizzes{text-align:center;padding:4rem 2rem;background:var(--bg-secondary);border-radius:16px;border:2px dashed var(--border-color)}.no-quizzes-icon{color:var(--text-muted);margin-bottom:1rem}.no-quizzes h3{font-size:1.5rem;color:var(--text-primary);margin-bottom:.5rem}.no-quizzes p{color:var(--text-secondary)}@media (max-width: 1024px){.quiz-selection{max-width:900px}.quiz-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}.quiz-card{padding:2.5rem 2rem;min-height:300px}.quiz-card-icon{width:80px;height:80px}.quiz-card-title{font-size:1.5rem}}@media (max-width: 768px){.selection-header{margin-bottom:3rem}.selection-title{font-size:2.5rem}.selection-subtitle{font-size:1.1rem}.quiz-grid{grid-template-columns:1fr;gap:1.5rem}.quiz-card{padding:2.5rem 2rem;min-height:280px}.quiz-card-icon{width:75px;height:75px}.quiz-card-title{font-size:1.4rem}.quiz-card-description{font-size:.95rem}.start-quiz-button{padding:.9rem 2rem;font-size:1rem;max-width:220px}}@media (max-width: 480px){.selection-header{margin-bottom:2rem}.selection-title{font-size:2rem}.selection-subtitle{font-size:1rem}.quiz-grid{gap:1.25rem}.quiz-card{padding:2rem 1.5rem;gap:1.25rem;min-height:260px}.quiz-card-icon{width:70px;height:70px}.quiz-card-title{font-size:1.3rem}.quiz-card-description{font-size:.9rem}.start-quiz-button{padding:.85rem 1.75rem;font-size:1rem;max-width:200px}}@media (max-width: 360px){.selection-title{font-size:1.75rem}.selection-subtitle{font-size:.95rem}.quiz-card{padding:1.75rem 1.25rem;min-height:240px}.quiz-card-icon{width:65px;height:65px}.quiz-card-title{font-size:1.2rem}.quiz-card-description{font-size:.85rem}.start-quiz-button{padding:.75rem 1.5rem;font-size:.95rem;max-width:180px}}.quiz-view{max-width:900px;margin:0 auto}.quiz-header{margin-bottom:2rem}.back-button{background:var(--bg-secondary);color:var(--text-secondary);padding:.75rem 1.25rem;border-radius:8px;border:1px solid var(--border-color);display:inline-flex;align-items:center;gap:.5rem;font-size:.95rem;margin-bottom:1rem;transition:all .3s ease}.back-button:hover{background:var(--bg-tertiary);color:var(--text-primary);border-color:var(--primary-color)}.quiz-title{font-size:2rem;font-weight:700;color:var(--text-primary);margin:0}.quiz-info{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap}.timer{display:flex;align-items:center;gap:.5rem;background:var(--bg-secondary);padding:.75rem 1.25rem;border-radius:8px;font-size:1.1rem;font-weight:600;color:var(--text-primary);border:2px solid var(--border-color);transition:all .3s ease}.timer-warning{border-color:var(--warning-color);color:var(--warning-color);animation:pulse 1s ease-in-out infinite}.timer-critical{border-color:var(--error-color);color:var(--error-color);animation:pulse .5s ease-in-out infinite}.question-counter{font-size:1rem;font-weight:600;color:var(--text-secondary)}.answered-counter{display:flex;align-items:center;gap:.5rem;color:var(--success-color);font-weight:600}.progress-bar-container{width:100%;height:8px;background:var(--bg-secondary);border-radius:4px;overflow:hidden;margin-bottom:2rem}.progress-bar{height:100%;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));transition:width .3s ease;border-radius:4px}.question-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:2.5rem;margin-bottom:2rem;box-shadow:var(--shadow-lg)}.question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.question-number{font-size:.9rem;font-weight:600;color:var(--primary-color);text-transform:uppercase;letter-spacing:.5px}.answered-badge{display:flex;align-items:center;gap:.5rem;background:#10b9811a;color:var(--success-color);padding:.5rem 1rem;border-radius:20px;font-size:.85rem;font-weight:600}.question-text{font-size:1.4rem;font-weight:600;color:var(--text-primary);line-height:1.6;margin-bottom:2rem}.options-container{display:flex;flex-direction:column;gap:1rem}.option-button{background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:12px;padding:1.25rem 1.5rem;display:flex;align-items:center;gap:1rem;cursor:pointer;transition:all .3s ease;text-align:left;position:relative;overflow:hidden}.option-button:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));opacity:0;transition:opacity .3s ease}.option-button:hover:before{opacity:.05}.option-button:hover{border-color:var(--primary-color);transform:translate(5px)}.option-button.selected{background:linear-gradient(135deg,#6366f11a,#ec48991a);border-color:var(--primary-color);box-shadow:0 0 0 3px #6366f11a}.option-letter{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;width:40px;height:40px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;flex-shrink:0;position:relative;z-index:1}.option-text{flex:1;font-size:1.05rem;color:var(--text-primary);position:relative;z-index:1}.option-check{color:var(--success-color);position:relative;z-index:1}.quiz-navigation{display:flex;justify-content:space-between;gap:1rem}.nav-button{padding:1rem 2rem;border-radius:12px;font-size:1rem;font-weight:600;display:flex;align-items:center;gap:.5rem;transition:all .3s 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ease}.modal-icon{width:80px;height:80px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1.5rem}.modal-icon.warning{background:#f59e0b1a;color:var(--warning-color)}.modal-title{font-size:1.8rem;font-weight:700;color:var(--text-primary);text-align:center;margin-bottom:1rem}.modal-text{font-size:1.05rem;color:var(--text-secondary);text-align:center;line-height:1.6;margin-bottom:2rem}.modal-actions{display:flex;gap:1rem}.modal-button{flex:1;padding:1rem;border-radius:12px;font-size:1rem;font-weight:600;transition:all .3s ease}.modal-button.primary{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;border:none}.modal-button.secondary{background:var(--bg-tertiary);color:var(--text-secondary);border:2px solid var(--border-color)}.modal-button:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}@media (max-width: 768px){.quiz-title{font-size:1.5rem}.quiz-info{flex-direction:column;align-items:stretch}.timer,.question-counter,.answered-counter{justify-content:center}.question-card{padding:1.5rem}.question-text{font-size:1.2rem}.quiz-navigation{flex-direction:column}.nav-button{max-width:100%}}@media (max-width: 480px){.quiz-header{margin-bottom:1.5rem}.quiz-title{font-size:1.25rem}.question-card{padding:1.25rem}.question-text{font-size:1.1rem;margin-bottom:1.5rem}.option-button{padding:1rem}.option-letter{width:35px;height:35px;font-size:1rem}.option-text{font-size:.95rem}.modal-content{padding:2rem}.modal-title{font-size:1.5rem}.modal-actions{flex-direction:column}}.results-view{max-width:900px;margin:0 auto}.results-header{text-align:center;margin-bottom:3rem}.trophy-icon{width:120px;height:120px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1.5rem;animation:pulse 2s ease-in-out infinite}.trophy-icon.excellent{background:linear-gradient(135deg,#10b98133,#05966933);color:var(--success-color)}.trophy-icon.great{background:linear-gradient(135deg,#3b82f633,#2563eb33);color:#3b82f6}.trophy-icon.good{background:linear-gradient(135deg,#6366f133,#4f46e533);color:var(--primary-color)}.trophy-icon.fair{background:linear-gradient(135deg,#f59e0b33,#d9770633);color:var(--warning-color)}.trophy-icon.needs-improvement{background:linear-gradient(135deg,#ef444433,#dc262633);color:var(--error-color)}.results-title{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.results-subtitle{font-size:1.2rem;color:var(--text-secondary)}.score-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;padding:3rem;margin-bottom:3rem;box-shadow:var(--shadow-xl)}.score-main{text-align:center;margin-bottom:3rem}.score-circle{position:relative;width:200px;height:200px;margin:0 auto 2rem}.score-ring{width:100%;height:100%;transform:rotate(0)}.score-text{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center}.score-percentage{font-size:3rem;font-weight:800;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}.score-fraction{font-size:1.2rem;color:var(--text-secondary);margin-top:.5rem}.performance-message{font-size:1.8rem;font-weight:700;padding:1rem 2rem;border-radius:12px;display:inline-block}.performance-message.excellent{background:#10b9811a;color:var(--success-color)}.performance-message.great{background:#3b82f61a;color:#3b82f6}.performance-message.good{background:#6366f11a;color:var(--primary-color)}.performance-message.fair{background:#f59e0b1a;color:var(--warning-color)}.performance-message.needs-improvement{background:#ef44441a;color:var(--error-color)}.score-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem}.stat-item{display:flex;align-items:center;gap:1rem;padding:1.5rem;background:var(--bg-tertiary);border-radius:12px;border:1px solid var(--border-color)}.stat-icon{color:var(--primary-color)}.stat-icon.success{color:var(--success-color)}.stat-icon.error{color:var(--error-color)}.stat-content{flex:1}.stat-label{font-size:.9rem;color:var(--text-secondary);margin-bottom:.25rem}.stat-value{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.detailed-results{margin-bottom:3rem}.detailed-title{font-size:1.8rem;font-weight:700;color:var(--text-primary);margin-bottom:1.5rem;text-align:center}.results-list{display:flex;flex-direction:column;gap:1.5rem}.result-item{background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:16px;padding:2rem;transition:all .3s ease}.result-item.correct{border-left:4px solid var(--success-color)}.result-item.incorrect{border-left:4px solid var(--error-color)}.result-item:hover{transform:translate(5px);box-shadow:var(--shadow-md)}.result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.result-number{font-size:.9rem;font-weight:600;color:var(--primary-color);text-transform:uppercase}.result-badge{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:20px;font-size:.85rem;font-weight:600}.result-badge.correct{background:#10b9811a;color:var(--success-color)}.result-badge.incorrect{background:#ef44441a;color:var(--error-color)}.result-question{font-size:1.1rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem;line-height:1.6}.result-answers{display:flex;flex-direction:column;gap:.75rem}.answer-row{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.answer-label{font-size:.95rem;color:var(--text-secondary);font-weight:600;min-width:120px}.answer-value{flex:1;padding:.75rem 1rem;border-radius:8px;font-size:.95rem;font-weight:500}.answer-value.correct{background:#10b9811a;color:var(--success-color);border:1px solid rgba(16,185,129,.3)}.answer-value.incorrect{background:#ef44441a;color:var(--error-color);border:1px solid rgba(239,68,68,.3)}.results-actions{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}.action-button{padding:1rem 2rem;border-radius:12px;font-size:1rem;font-weight:600;display:flex;align-items:center;gap:.75rem;transition:all .3s ease;min-width:200px;justify-content:center}.action-button.primary{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;border:none}.action-button.primary:hover{transform:translateY(-3px);box-shadow:var(--shadow-xl)}.action-button.secondary{background:var(--bg-secondary);color:var(--text-secondary);border:2px solid var(--border-color)}.action-button.secondary:hover{background:var(--bg-tertiary);color:var(--text-primary);border-color:var(--primary-color);transform:translateY(-3px)}@media (max-width: 768px){.results-title{font-size:2rem}.results-subtitle{font-size:1rem}.trophy-icon{width:100px;height:100px}.score-card{padding:2rem}.score-circle{width:160px;height:160px}.score-percentage{font-size:2.5rem}.performance-message{font-size:1.5rem}.score-stats{grid-template-columns:1fr;gap:1rem}.result-item{padding:1.5rem}.results-actions{flex-direction:column}.action-button{width:100%}}@media (max-width: 480px){.results-title{font-size:1.75rem}.trophy-icon{width:80px;height:80px}.score-card{padding:1.5rem}.score-circle{width:140px;height:140px}.score-percentage{font-size:2rem}.score-fraction{font-size:1rem}.performance-message{font-size:1.25rem;padding:.75rem 1.5rem}.stat-item{padding:1rem}.stat-value{font-size:1.25rem}.detailed-title{font-size:1.5rem}.result-item{padding:1.25rem}.result-question{font-size:1rem}.answer-row{flex-direction:column;align-items:flex-start;gap:.5rem}.answer-label{min-width:auto}.answer-value{width:100%}}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:4rem 2rem;min-height:300px}.spinner{width:60px;height:60px;border:4px solid var(--bg-tertiary);border-top:4px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}.loading-text{margin-top:1.5rem;color:var(--text-secondary);font-size:1.1rem;font-weight:500}@media (max-width: 480px){.spinner{width:50px;height:50px}.loading-text{font-size:1rem}}*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #6366f1;--primary-dark: #4f46e5;--primary-light: #818cf8;--secondary-color: #ec4899;--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--bg-color: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--text-muted: #94a3b8;--border-color: #475569;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#0f172a,#1e293b,#0f172a);color:var(--text-primary);min-height:100vh;line-height:1.6}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}button{cursor:pointer;border:none;outline:none;font-family:inherit;transition:all .3s ease}button:disabled{cursor:not-allowed;opacity:.6}input,select,textarea{font-family:inherit;outline:none}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--primary-color);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--primary-dark)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{to{transform:rotate(360deg)}}.fade-in{animation:fadeIn .5s ease-out}.slide-in{animation:slideIn .5s ease-out}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.text-center{text-align:center}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-1{gap:.5rem}.gap-2{gap:1rem}.gap-3{gap:1.5rem}.gap-4{gap:2rem}@media (max-width: 768px){.container{padding:0 .75rem}}@media (max-width: 480px){body{font-size:14px}}