.app{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.container{background:#fff;border-radius:20px;box-shadow:0 20px 60px #0000004d;padding:40px;max-width:900px;width:100%;animation:fadeIn .5s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.header{text-align:center;margin-bottom:40px}.header h1{font-size:2.5rem;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:10px}.header p{color:#666;font-size:1.1rem}.topic-total{color:#667eea!important;font-weight:600;margin-top:5px}.config-card{background:#f8f9fa;border-radius:15px;padding:30px;margin-bottom:30px}.config-title{font-size:1.5rem;color:#333;margin-bottom:30px;text-align:center}.preset-buttons{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}.preset-btn{padding:12px 24px;border:2px solid #e0e0e0;background:#fff;border-radius:10px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease;min-width:70px}.preset-btn:hover{border-color:#667eea;background:#f8f9ff}.preset-btn.active{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-color:#667eea}.slider-container{margin-bottom:30px;text-align:center}.slider{width:100%;height:8px;border-radius:5px;background:#e0e0e0;outline:none;-webkit-appearance:none;margin-bottom:15px}.slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);cursor:pointer;box-shadow:0 2px 8px #667eea66}.slider::-moz-range-thumb{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);cursor:pointer;border:none;box-shadow:0 2px 8px #667eea66}.slider-value{font-size:1.8rem;font-weight:700;color:#667eea}.config-info{background:#fff;border-radius:10px;padding:20px;margin-top:20px}.info-item{display:flex;align-items:center;gap:12px;padding:10px 0;color:#666;font-size:1rem}.info-item:not(:last-child){border-bottom:1px solid #f0f0f0}.info-icon{font-size:1.5rem}.topics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-top:30px}.topic-button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:15px;padding:25px 20px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea66}.topic-button:hover{transform:translateY(-5px);box-shadow:0 8px 25px #667eea99}.topic-button:active{transform:translateY(-2px)}.progress-bar{width:100%;height:10px;background:#e0e0e0;border-radius:10px;overflow:hidden;margin-bottom:30px}.progress-fill{height:100%;background:linear-gradient(90deg,#667eea,#764ba2);transition:width .3s ease}.question-card{background:#f8f9fa;border-radius:15px;padding:30px;margin-bottom:30px}.question-number{color:#667eea;font-weight:600;font-size:1.1rem;margin-bottom:15px}.question-text{font-size:1.3rem;font-weight:600;color:#333;margin-bottom:10px;line-height:1.5;white-space:pre-wrap}.option-text{flex:1;line-height:1.5;white-space:pre-wrap;font-family:inherit}.option-text code,.question-text code{background:#f4f4f4;padding:2px 6px;border-radius:4px;font-family:Courier New,monospace;font-size:.9em;color:#e83e8c}.code-block{background:#2d2d2d;color:#f8f8f2;padding:15px;border-radius:8px;font-family:Courier New,monospace;font-size:.9rem;overflow-x:auto;margin:10px 0;line-height:1.5}.question-type{font-size:.9rem;color:#999;margin-bottom:25px}.options{display:flex;flex-direction:column;gap:15px}.option{background:#fff;border:2px solid #e0e0e0;border-radius:10px;padding:15px 20px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:12px}.option:hover,.option.selected{border-color:#667eea;background:#f8f9ff}.option.correct{border-color:#4caf50;background:#e8f5e9}.option.incorrect{border-color:#f44336;background:#ffebee}.option.disabled{cursor:not-allowed;opacity:.7}.option-indicator{width:24px;height:24px;border:2px solid #ccc;border-radius:50%;flex-shrink:0}.option-indicator.checkbox{border-radius:4px}.option.selected .option-indicator{background:#667eea;border-color:#667eea;position:relative}.option.selected .option-indicator:after{content:"✓";position:absolute;color:#fff;font-size:14px;top:50%;left:50%;transform:translate(-50%,-50%)}.option.correct .option-indicator{background:#4caf50;border-color:#4caf50}.option.incorrect .option-indicator{background:#f44336;border-color:#f44336}.option-text{flex:1;font-size:1rem;color:#333}.feedback{margin-top:20px;padding:15px;border-radius:10px;font-weight:500;line-height:1.6}.feedback.correct{background:#e8f5e9;color:#2e7d32}.feedback.incorrect{background:#ffebee;color:#c62828}.explanation{margin-top:12px;padding:12px;background:#ffffff80;border-radius:8px;font-size:.95rem;color:#5d1717}.explanation ul{list-style-type:disc;color:#5d1717}.explanation li{line-height:1.5}.buttons{display:flex;gap:15px;justify-content:center;margin-top:30px}.btn{padding:15px 40px;border:none;border-radius:10px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;box-shadow:0 4px 15px #667eea66}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea99}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:#f0f0f0;color:#333}.btn-secondary:hover{background:#e0e0e0}.results-container{text-align:center}.score-circle{width:200px;height:200px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;margin:40px auto;box-shadow:0 10px 40px #667eea66}.score-text{color:#fff;font-size:3rem;font-weight:700}.results-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:20px;margin:30px 0}.stat-card{background:#f8f9fa;padding:20px;border-radius:10px}.stat-label{color:#666;font-size:.9rem;margin-bottom:5px}.stat-value{font-size:2rem;font-weight:700;color:#667eea}.loading{text-align:center;padding:60px}.spinner{width:50px;height:50px;border:4px solid #f3f3f3;border-top:4px solid #667eea;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 20px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error{background:#ffebee;color:#c62828;padding:20px;border-radius:10px;text-align:center}@media (max-width: 768px){.container{padding:20px;max-width:100%}.header h1{font-size:1.8rem}.header p{font-size:1rem}.topics-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:15px}.topic-button{padding:20px 15px;font-size:1rem}.question-text{font-size:1.1rem}.score-circle{width:150px;height:150px}.score-text{font-size:2.5rem}.config-card{padding:20px}.config-title{font-size:1.2rem}.preset-buttons{gap:8px}.preset-btn{padding:10px 18px;font-size:1rem;min-width:60px}.slider-value{font-size:1.5rem}.info-item{font-size:.9rem}.buttons{flex-direction:column;gap:10px}.btn{width:100%;padding:12px 20px}}@media (max-width: 480px){.container{padding:15px}.header h1{font-size:1.5rem}.topics-grid{grid-template-columns:1fr}.config-title{font-size:1.1rem}.preset-buttons{justify-content:space-between}.preset-btn{flex:1;min-width:50px;padding:10px}}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:-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,#667eea,#764ba2);min-height:100vh;color:#333;overflow-x:hidden}#root{min-height:100vh;width:100%}