*, ::before, ::after{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    background: linear-gradient(to right, #333, #ccc);
}

h1, h2{
    text-align: center;
    font-size: 6vW;
    padding: 20px 0;
}

canvas {
    display: block;
    margin: 0 auto;
    border: 1px solid #333;
    background: #fff;
}

.para{
    font-size: 4vW;
    text-align: center;
}