.wait-backdrop {
   position: fixed;
   top: 0;
   right: 0;
   bottom: 0;
   left: 0;
   z-index: 9998;
   background-color: #aaa;
   opacity: .7;
}

.wait-scrollbar-measure {
   position: absolute;
   top: -9999px;
   width: 50px;
   height: 50px;
   overflow: scroll;
}

.wait-content {
   position: fixed;
   left: 0;
   right: 0;
   top: 50%;
   transform: translateY(-50%);
   z-index: 9999;
}

#wait-spinner {
   width: 80px;
   height: 80px;
   margin: 0px auto;
}

#wait-spinner .sk-circle:before {
   background-color: #000;
}

#wait-text {
   text-align: center;
   font-size: x-large;
   padding-top: 10px;
}

#wait-text:empty {
   display: none;
}