html, body {
    margin: 0;
    height: 100%;
    overflow: hidden;
}
  
mc-arkanoid {
    display: block;
}

mc-arkanoid > canvas {
    position: absolute;
    z-index: 10000;
    width: 100vw;   /* Stretch to viewport width */
    height: 100vh;  /* Stretch to viewport height */
    display: block;
    border: 1px solid grey;
}

/*
mc-arkanoid-ball {
    z-index: 1;
    display: block;
    position: relative;
    min-width: 10px;
    min-height: 10px;
    max-width: 10px;
    max-height: 10px;
    background-color: grey;
    border-radius: 10px;
    border-color: black;
    border-style: solid;
    border-width: 2px;
    overflow: hidden;
}
*/