html, body {
    margin: 0;
    padding: 0;
}

body {
    height: 100%;
    width: 100%;
    background-color: rgb(40,40,40);
}

#loading-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate( -50%, -50% );
}
#loading-screen h1 {
    margin-bottom: 5px;
    text-align: center;
}
#loading-bar {
    width: 0%;
    height: 20px;
    padding: 0 5px;
    background-color: #111;
    box-sizing: border-box;
}
#loading-bar:after {
    content: attr( data-text );
    display: inline-block;
    width: 220px;
    color: #ddd;
    white-space: nowrap;
    text-align: center;
    font-size: 13px;
}

canvas {
    display: block;
    height: 100%;
    width: 100%;
}