.ajax-preloader {
  position: fixed;
  z-index: 900;

  width: 50px;
  height: 50px;
  top: 50%;
  left: 50%;
  margin-left: -25px;
  margin-top: -25px;
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: center center;
  background: url('../images/loading.svg');
}

.ajax-preloader-shadow {
  position: fixed;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  top: 0;
  left: 0;
  z-index: 800;
}