style.css

.webgl-content * {border: 0; margin: 0; padding: 0}
.webgl-content {top: 0; left: 0;}

.webgl-content .logo, .progress {position: absolute; left: 50%; top: 50%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%);}
.webgl-content .logo {background: url('../images/progressLogo.Light.png') no-repeat center / contain; width: 154px; height: 130px;}
.webgl-content .progress {height: 18px; width: 141px; margin-top: 90px;}
.webgl-content .progress .empty {background: url('../images/progressEmpty.Light.png') no-repeat right / cover; float: right; width: 100%; height: 100%; display: inline-block;}
.webgl-content .progress .full {background: url('../images/progressFull.Light.png') no-repeat left / cover; float: left; width: 0%; height: 100%; display: inline-block;}

.webgl-content .logo.Dark {background-image: url('../images/progressLogo.Dark.png');}
.webgl-content .progress.Dark .empty {background-image: url('../images/progressEmpty.Dark.png');}
.webgl-content .progress.Dark .full {background-image: url('../images/progressFull.Dark.png');}

.webgl-content .footer {margin-top: 5px; height: 38px; line-height: 38px; font-family: Helvetica, Verdana, Arial, sans-serif; font-size: 18px;} 
.webgl-content .footer .webgl-logo, .title, .fullscreen {height: 100%; display: inline-block; background: transparent center no-repeat;} 
.webgl-content .footer .webgl-logo {background-image: url('../images/webgl-logo.png'); width: 204px; float: left;}
.webgl-content .footer .title {margin-right: 10px; float: right;}
.webgl-content .footer .fullscreen {background-image: url('../images/fullscreen.png'); width: 38px; float: right;}

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

#gameContainer canvas{
    position:absolute;
    transform:translate(-50%, -50%);
    top:50%;
    left:50%;

}

.simmer{
    position:absolute;
    bottom:10px;
    right:10px;
    color:#aaa;
    font-size:9px;
    font-family:sans-serif;
    font-family:sans-serif;

    /*want to remove the simmer branding? uncomment display:none below!*/
    /*display:none;*/
}

.simmer a{
    color:#cccccc;
    text-decoration:none;
    font-size:12px;
    transition:opacity 3s;

}

.simmer a:hover{
    color:#fff;
    text-decoration:underline;
}

.simmer.hide {
    opacity:0;
}