body { 
    border: 0px none; 
    margin: 0; 
    background-color: black; 
}
/* the canvas *must not* have any border or padding, or mouse coords will be wrong */
canvas {
    position: absolute;
    left: 0;
    top: 0;
    border: 0px none;
    padding: 0;
    background-color: #000000;
    margin: auto; 
    width: 100vw; height: 100vh; 
    display: block;
    resize: none;
}

canvas.emscripten {
    visibility: hidden;
}

#canvas2d {
    visibility: hidden;
    background-color: #00000000;
}

#btn_play {
    position: absolute;
    left: 50%;
    bottom: 25%;
    width:16%;
    margin-left:-8%;
    outline: none;
    border: 0px none;
    background-color: transparent;
}

button.storelink {
    position: absolute;
    outline: none;
    width:10%;
    margin-left: -5%;
    border: 0px none;
    background-color: transparent;
}

#btn_google {
    left: 35%;
    bottom: 2%;
}

#btn_appstore {
    left: 45%;
    bottom: 2%;
}

#btn_microsoft {
    left: 55%;
    bottom: 2%;
}

#btn_amazon {
    left: 65%;
    bottom: 2%;
}

#landing_bg {
    position: absolute;
    left: 50%;
    width:50%;
    margin-left: -25%;
}