.dimmed {
    position: relative;
}

.dimmed::after {
    content: " ";
    z-index: 10;
    display: block;
    position: fixed;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.5);
}

#progressbar {
    height:20px;
    width: 50%;
    border: 1px solid Black;
    text-align: left;
    position: fixed;
    top: calc(50vh - (/* height */20px / 2));
    left: calc(50vw - (/* width */50% / 2)); 
}

#progressbar .ui-progressbar-value {
    background-color: #ccc;
}
/* Ifwe were to change the loading animaton - here is where we would override it */
.ui-progressbar .ui-progressbar-overlay {
	/* background: url('<%=request.getContextPath()%>/js/themes/smoothness/images/loading.gif'); */
	height: 100%;
	filter: alpha(opacity=25); /* support: IE8 */
	opacity: 0.25;
}