.shiny-loader-output-container {
  position: relative;
}

.load-container {
  z-index: 1;
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  transform: translateY(-50%);
  /* to avoid showing a vertical scrollbar
  http://stackoverflow.com/questions/38251204/horizontal-animation-causes-vertical-scrollbar-in-css */
  width: 100%;
}
.loader-img{
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 40%;
}
.shiny-loader-hidden {
  position: absolute;
  top:0;
  left:0;
  z-index: -1;
  visibility:hidden;
}