body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background: #f4f4f4;
}

h1, h2 {
    text-align: center;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 40px;
    background: white;
}

table th, table td {
    border: 1px solid #ccc;
    padding: 6px;
    text-align: center;
}

table th {
    background: #e0e0e0;
}

canvas {
    margin: 30px auto;
    display: block;
    max-width: 900px;
}