canvas {
    position: absolute;
}

canvas.hidden {
    display: none;
}

img {
    display: none;
}

#overlay {
    z-index: 1;
}

#menu {
    display: flex;
    flex-direction: row;
    transition: 0.5s;
    flex-wrap: wrap;
}

#menu.start input,
#menu.start button,
#menu.start label {
    font-size: 36pt;
}

#menu.start .nostart {
    display: none;
}