.app{background:#fff;border-radius:16px;box-shadow:0 20px 60px #0000004d;padding:40px;width:100%}.header{text-align:center;margin-bottom:30px}.header h1{color:#333;font-size:2rem;margin-bottom:10px}.header p{color:#666;font-size:1rem}.stats{display:flex;justify-content:space-around;background:#f5f5f5;border-radius:12px;padding:20px;margin-bottom:30px;flex-wrap:wrap;gap:15px}.stat-item{text-align:center;flex:1;min-width:120px}.stat-label{font-size:.875rem;color:#666;margin-bottom:5px;font-weight:500}.stat-value{font-size:1.5rem;font-weight:700;color:#333}.content{margin-bottom:30px}.post-section,.reply-section{margin-bottom:25px}.section-label{font-size:.875rem;color:#666;margin-bottom:8px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.text-box{background:#f9f9f9;border:2px solid #e0e0e0;border-radius:8px;padding:20px;font-size:1rem;line-height:1.6;color:#333;min-height:80px}.reply-section .text-box{background:#fff5e6;border-color:#ffd699}.buttons{display:flex;gap:15px;margin-bottom:20px;flex-wrap:wrap}.button{flex:1;min-width:150px;padding:15px 30px;font-size:1rem;font-weight:600;border:none;border-radius:8px;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:.5px}.button:disabled{opacity:.5;cursor:not-allowed}.button-ai{background:#ff6b6b;color:#fff}.button-ai:hover:not(:disabled){background:#ff5252;transform:translateY(-2px);box-shadow:0 4px 12px #ff6b6b66}.button-human{background:#4ecdc4;color:#fff}.button-human:hover:not(:disabled){background:#26a69a;transform:translateY(-2px);box-shadow:0 4px 12px #4ecdc466}.button-next{background:#667eea;color:#fff;width:100%}.button-next:hover:not(:disabled){background:#5568d3;transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.result-message{text-align:center;padding:15px;border-radius:8px;margin-bottom:20px;font-weight:600;font-size:1.1rem;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.result-correct{background:#d4edda;color:#155724;border:2px solid #c3e6cb}.result-incorrect{background:#f8d7da;color:#721c24;border:2px solid #f5c6cb}.no-attempts{text-align:center;padding:20px;background:#fff3cd;border:2px solid #ffc107;border-radius:8px;color:#856404;font-weight:600;font-size:1.1rem;margin-bottom:20px}.upload-section{margin-bottom:30px}.upload-box{border:2px dashed #667eea;border-radius:12px;padding:30px;text-align:center;background:#f8f9ff;transition:all .3s ease}.upload-box:hover{border-color:#5568d3;background:#f0f2ff}.upload-label{display:inline-flex;align-items:center;gap:10px;cursor:pointer;color:#667eea;font-weight:600;font-size:1.1rem;padding:10px 20px;background:#fff;border-radius:8px;transition:all .3s ease}.upload-label:hover{background:#667eea;color:#fff;transform:translateY(-2px);box-shadow:0 4px 12px #667eea4d}.upload-icon{font-size:1.5rem}.upload-hint{margin-top:15px;color:#666;font-size:.9rem;line-height:1.6}.upload-error{margin-top:15px;padding:15px;background:#f8d7da;color:#721c24;border:2px solid #f5c6cb;border-radius:8px;font-weight:500}.upload-success{margin-top:15px;padding:15px;background:#d4edda;color:#155724;border:2px solid #c3e6cb;border-radius:8px;font-weight:500}.dataset-info{display:flex;justify-content:space-between;align-items:center;padding:15px 20px;background:#e8f4f8;border-radius:8px;margin-bottom:20px;font-size:.9rem;color:#666}.button-reset{padding:8px 16px;font-size:.875rem;font-weight:600;border:none;border-radius:6px;cursor:pointer;background:#6c757d;color:#fff;transition:all .3s ease}.button-reset:hover{background:#5a6268;transform:translateY(-1px)}@media (max-width: 600px){.app{padding:20px}.header h1{font-size:1.5rem}.stats,.buttons{flex-direction:column}.button{width:100%}.dataset-info{flex-direction:column;gap:10px;text-align:center}.button-reset{width:100%}}*{margin:0;padding:0;box-sizing:border-box}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;display:flex;justify-content:center;align-items:center;padding:20px}#root{width:100%;max-width:800px}