:root{--scale:8;--primary-color:#3b82f6;--primary-hover:#2563eb;--secondary-color:#f3f4f6;--text-color:#1f2937;--border-color:#d1d5db;--shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}body{color:var(--text-color);background-color:#f9fafb;margin:0;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.5}h3{color:var(--text-color);text-align:center;margin-bottom:1.5rem;font-size:1.25rem;font-weight:600}.container{box-shadow:var(--shadow);background:#fff;border-radius:16px;max-width:600px;margin:30px auto;padding:24px}#canvasDrawing{border:2px solid var(--border-color);width:calc(28px*var(--scale));height:calc(28px*var(--scale));touch-action:none;box-shadow:var(--shadow);background:#fff;border-radius:12px;margin:30px auto;display:block}.prediction-box{background-color:var(--secondary-color);border-radius:12px;margin-bottom:20px;padding:20px}.guess-result{text-align:center;margin-bottom:20px}#guessText{color:var(--primary-color);margin:10px 0;font-size:48px;font-weight:700;display:block}#chartDiv{background:#fff;border-radius:8px;padding:20px}#canvasGraph{max-width:100%;margin:0 auto;display:block}.chart-label{text-align:center;color:#6b7280;margin-top:10px;font-size:.9rem}.training-box{background-color:var(--secondary-color);border-radius:12px;padding:20px}.input-group{margin-bottom:15px}button{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:8px;margin:5px;padding:12px 24px;font-size:1rem;font-weight:500;transition:all .2s}button:hover{background-color:var(--primary-hover);transform:translateY(-1px)}button:active{transform:translateY(0)}.train-button{width:100%;margin-top:10px}.center-button{margin:0 auto;display:block}.import-button{width:auto;margin:5px 0}input[type=number]{border:1px solid var(--border-color);box-sizing:border-box;border-radius:6px;width:100%;padding:10px 12px;font-size:.95rem}input[type=number]:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 2px #3b82f633}label{color:var(--text-color);margin-bottom:6px;font-weight:500;display:block}#extrasDiv{display:none}.button-group{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.button-group-left{flex-wrap:wrap;justify-content:flex-start;gap:10px;display:flex}input[type=file]{width:100%;margin-bottom:10px}@media (width<=640px){body{padding:10px}.container{margin:15px auto;padding:16px}#canvasDrawing{width:196px;height:196px}:root{--scale:7}button{width:100%;margin:5px 0}.button-group,.button-group-left{flex-direction:column}#guessText{font-size:36px}.import-button{width:100%}}
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