html,
body {
    background-color: #333;
    color: #fff;
    font-family: helvetica, arial, sans-serif;
    margin: 0;
    padding: 0;
    overflow: hidden;
    width: 100%;
    height: 100%;
    min-height: 505px;
}

#canvas {
    display: block;
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#wrapper {
    width: 100%;
    height: 100%;
}

#username_text {
    position: absolute;
    z-index: -1;
    top: 0;
    left: 0;
    width: 0;
    font-size: 1px;
    opacity: 0;
    color: transparent !important;
    text-indent: -9999px;
    pointer-events: none;
}