* {
    box-sizing: border-box;
}

html, body {
    height: 100%
}

body {
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgb(195, 241, 255);
}

canvas {
    background-color: lightskyblue;
}