.loading {
  background: rgba(0, 0, 0, 0.3);
  bottom: 0;
  left: 0;
  position: fixed;
  right: 0;
  top: 0;
  z-index: 9998;
}

.spinner {
  background: #000
    url(https://code.jquery.com/mobile/1.1.0/images/ajax-loader.gif) 0 0
    no-repeat;
  border: 0;
  -webkit-border-radius: 36px;
  -moz-border-radius: 36px;
  border-radius: 36px;
  box-shadow: 0 1px 1px -1px #fff;
  display: block;
  height: 46px;
  left: 50%;
  margin: -23px 0 0 -23px;
  opacity: 0.18;
  overflow: hidden;
  padding: 1px;
  position: fixed;
  text-align: center;
  top: 50%;
  width: 46px;
  z-index: 9999;
}