html,
body {
    width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
    overflow: hidden;
    box-sizing: border-box;
    /*border: solid 1px red;*/
    text-align: center;
}

body {
    background-size: 64px 64px;
    background-color: #000;
    /*
    background-image:
        linear-gradient(to right, grey 1px, transparent 1px),
        linear-gradient(to bottom, grey 1px, transparent 1px);
        */
}

svg {
    /*border: dashed 1px blue;*/
    background: rgba(0, 0, 0, 1);
    /*
    position: absolute;
    left: 64px;
    top: 64px;
    width: 832px;
    height: 832px;
    */
    height: 100vh;
    width: 100vh;
    margin: auto;
    /*
    width: 90vh;
    height: 90vh;
    margin-top: 5vh;
    */
}

#player1, #player2, #attract_mode {
    /*visibility: hidden;*/
}