#aoh-loader {
  position: absolute;
  left: 50%;
  padding-top: 100px;
  text-align: center;
  width: 60px;
  height: 60px;
}
#aoh-loader div {
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  width: 60px;
  height: 60px;
  margin-left: -60px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

@-webkit-keyframes spin {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}