/* Absolute Center CSS Spinner */
 .loading {
   position: fixed;
   z-index: 999;
   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%;
 }

 /* :not(:required) hides these rules from IE9 and below */
 .loading:not(:required) {
   /* hide "loading..." text */
   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(238, 157, 7, 0.75) 1.5em 0 0 0, rgba(238, 157, 7, 0.75) 1.1em 1.1em 0 0, rgba(238, 157, 7, 0.75) 0 1.5em 0 0, rgba(238, 157, 7, 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(238, 157, 7, 0.75) 0 -1.5em 0 0, rgba(238, 157, 7, 0.75) 1.1em -1.1em 0 0;
   box-shadow: rgba(238, 157, 7, 0.75) 1.5em 0 0 0, rgba(238, 157, 7, 0.75) 1.1em 1.1em 0 0, rgba(238, 157, 7, 0.75) 0 1.5em 0 0, rgba(238, 157, 7, 0.75) -1.1em 1.1em 0 0, rgba(238, 157, 7, 0.75) -1.5em 0 0 0, rgba(238, 157, 7, 0.75) -1.1em -1.1em 0 0, rgba(238, 157, 7, 0.75) 0 -1.5em 0 0, rgba(238, 157, 7, 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);
   }
 }