/* Absolute Center Spinner */
.loading {
  position: fixed;
  display: none;
  z-index: 1031;
  height: 2em;
  width: 2em;
  overflow: show;
  margin: auto;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
}

  /* Transparent Overlay */
  .loading:before {
      content: '';
      display: block;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0,0,0,0.3);
  }

  /* :not(:required) hides these rules from IE9 and below */
  .loading:not(:required) {
      font: 0/0 a;
      color: transparent;
      text-shadow: none;
      background-color: transparent;
      border: 0;
  }

      .loading:not(:required):after {
          content: '';
          display: block;
          font-size: 10px;
          width: 1em;
          height: 1em;
          margin-top: -0.5em;
          -webkit-animation: spinner 1500ms infinite linear;
          -moz-animation: spinner 1500ms infinite linear;
          -ms-animation: spinner 1500ms infinite linear;
          -o-animation: spinner 1500ms infinite linear;
          animation: spinner 1500ms infinite linear;
          border-radius: 0.5em;
          -webkit-box-shadow: rgba(0, 0, 0, 0.75) 1.5em 0 0 0, rgba(0, 0, 0, 0.75) 1.1em 1.1em 0 0, rgba(0, 0, 0, 0.75) 0 1.5em 0 0, rgba(0, 0, 0, 0.75) -1.1em 1.1em 0 0, rgba(0, 0, 0, 0.5) -1.5em 0 0 0, rgba(0, 0, 0, 0.5) -1.1em -1.1em 0 0, rgba(0, 0, 0, 0.75) 0 -1.5em 0 0, rgba(0, 0, 0, 0.75) 1.1em -1.1em 0 0;
          box-shadow: rgba(0, 0, 0, 0.75) 1.5em 0 0 0, rgba(0, 0, 0, 0.75) 1.1em 1.1em 0 0, rgba(0, 0, 0, 0.75) 0 1.5em 0 0, rgba(0, 0, 0, 0.75) -1.1em 1.1em 0 0, rgba(0, 0, 0, 0.75) -1.5em 0 0 0, rgba(0, 0, 0, 0.75) -1.1em -1.1em 0 0, rgba(0, 0, 0, 0.75) 0 -1.5em 0 0, rgba(0, 0, 0, 0.75) 1.1em -1.1em 0 0;
      }

/* Animation */
@-webkit-keyframes spinner {
  0% {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      transform: rotate(0deg);
  }

  100% {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      transform: rotate(360deg);
  }
}

@-moz-keyframes spinner {
  0% {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      transform: rotate(0deg);
  }

  100% {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      transform: rotate(360deg);
  }
}

@-o-keyframes spinner {
  0% {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      transform: rotate(0deg);
  }

  100% {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      transform: rotate(360deg);
  }
}

@keyframes spinner {
  0% {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      transform: rotate(0deg);
  }

  100% {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      transform: rotate(360deg);
  }
}