body {
    margin: 0;
    padding: 0;
    background: #f8f9fa;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    font-family: Arial, Helvetica, sans-serif;
}

#canvas-container {
    width: 100%;
    max-width: 720px;
}

canvas {
    display: block;
}