#main-loading{
  background-color: #508dca;
  position: relative;
}

#main-loading #app-loading{
  position: absolute;
  background-repeat: no-repeat;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

#main-loading #loading-gif{
  position: absolute;
  background-image: url('images/predefined_loading_1.gif');
  background-repeat: no-repeat;
  width: 58px;
  height: 29px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}