body {
    margin: 0;
    overflow: hidden;
}

#game {
    width: 100vw;
    height: 100vh;
    display: block;
}

#hud {
    position: absolute;
    top: 10px;
    left: 10px;
    color: white;
    font-family: Arial;
    font-size: 20px;
}

.hidden {
    display: none;
}