body {background: #dcdcdc;}

.webgl-content * {border: 0; margin: 0; padding: 0}
.webgl-content {position: absolute; top: 50%; left: 50%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%);
box-shadow: 0 0 20px rgba(0,0,0,0.25)}

.webgl-content .logo {position: absolute; left: 50%; top: 40%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%);}
.webgl-content .progress {position: absolute; left: 50%; top: 50%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%);}
.webgl-content .logo {background: url('game_logo.png') no-repeat center / contain; width: 256px; height: 256px;}
.webgl-content .progress {height: 2px; width: 256px; margin-top: 90px;}
.webgl-content .progress .empty {background: url('dark.png') no-repeat right / cover; float: right; width: 100%; height: 100%; display: inline-block;}
.webgl-content .progress .full {background: url('light.png') no-repeat left / cover; float: left; width: 0%; height: 100%; display: inline-block;}