body {
    font-family: Arial;
    margin: 20px;
}

canvas {
    border: 1px solid #ccc;
    display: block;
    max-width: 50%;
    margin: 0 auto;
}

#error {
    color: red;
}

.container {
    display: flex;
    gap: 30px;
}

.left, .right {
    flex: 1;
}