.webgl-content * {border: 0; margin: 0; padding: 0}
.webgl-content {background: url('background.jpg') no-repeat; position: absolute; top: 50%; left: 50%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%);}

.webgl-content .progress {position: absolute; left: 50%; top: 66%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%);}
.webgl-content .progress {height: 24px; width: 164px;}
.webgl-content .progress .background {background-color: #585858; float: right; width: 100%; height: 100%; display: inline-block; position: absolute;}
.webgl-content .progress .empty {background: url('progressEmpty.png') no-repeat right / cover;  float: right; width: 100%; height: 100%; display: inline-block; position: absolute;}
.webgl-content .progress .full {background: url('progressFull.png') no-repeat left / cover; float: left; width: 100%; height: 100%; display: inline-block; position: absolute;}