html, body {
    width: 90vw;
    height: 90vh;
    margin: 0;
}

body {
    padding: 1em;
    display: flex;
    flex-direction: column;
    gap: .2em;
}

canvas {
    display: block;
    margin: 0 auto;
    background-color: lightsteelblue;
}

.hud {
    flex: 2;
}

.controls {
    flex: 1;
}