/* Absolute Center 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%;
              background: radial-gradient(rgba(20, 20, 20,.8), rgba(0, 0, 0, .8));
          
            background: -webkit-radial-gradient(rgba(20, 20, 20,.8), rgba(0, 0, 0,.8));
          }
          
          /* :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 150ms infinite linear;
            -moz-animation: spinner 150ms infinite linear;
            -ms-animation: spinner 150ms infinite linear;
            -o-animation: spinner 150ms infinite linear;
            animation: spinner 150ms infinite linear;
            border-radius: 0.5em;
            -webkit-box-shadow: rgba(255,255,255, 0.75) 1.5em 0 0 0, rgba(255,255,255, 0.75) 1.1em 1.1em 0 0, rgba(255,255,255, 0.75) 0 1.5em 0 0, rgba(255,255,255, 0.75) -1.1em 1.1em 0 0, rgba(255,255,255, 0.75) -1.5em 0 0 0, rgba(255,255,255, 0.75) -1.1em -1.1em 0 0, rgba(255,255,255, 0.75) 0 -1.5em 0 0, rgba(255,255,255, 0.75) 1.1em -1.1em 0 0;
          box-shadow: rgba(255,255,255, 0.75) 1.5em 0 0 0, rgba(255,255,255, 0.75) 1.1em 1.1em 0 0, rgba(255,255,255, 0.75) 0 1.5em 0 0, rgba(255,255,255, 0.75) -1.1em 1.1em 0 0, rgba(255,255,255, 0.75) -1.5em 0 0 0, rgba(255,255,255, 0.75) -1.1em -1.1em 0 0, rgba(255,255,255, 0.75) 0 -1.5em 0 0, rgba(255,255,255, 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);
            }
          }