.viewer-loader{
  position: absolute;
  display: flex;
  width: 192px;
  height: 192px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #FFFFFF;
  z-index: 25;
}
.viewer-loader img{
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
  object-fit: contain;
}