#app-loader {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: -999999;
  background: white;
  display: flex;
  justify-content: center;
  align-items: center;
}

#app-loader>div {
  display: inline-block;
  width: 80px;
  height: 80px;
}

#app-loader>div:after {
  content: " ";
  display: block;
  width: 64px;
  height: 64px;
  margin: 8px;
  border-radius: 50%;
  border: 6px solid #3498db;
  border-color: #3498db transparent #3498db transparent;
  animation: app-loader 1.2s linear infinite;
}

@keyframes app-loader {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}