#ajax-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  text-align: center;
  line-height: 100vh;
  font-size: 1.5em;
  z-index: 9999;
}