/*
 *  Usage:
 *
      <div id="circle_spinner" class="backdrop">
    <div class="sk-double-bounce">
        <div class="sk-child sk-double-bounce1"></div>
        <div class="sk-child sk-double-bounce2"></div>
        <span>Loading...</span>
    </div>
</div>
 *
 */
    .circle-spinner {
  width: 80px;
  height: 80px;

  position: fixed;
  top: 50%;
  left: 50%;
}
    .backdrop {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1100;
  overflow: hidden;
  background-color: #000;
  opacity: 0.5;
  display: none;
}

.sk-double-bounce {
   width: 80px;
  height: 80px;
  position: fixed;
  top: 50%;
  left: 50%; }
.sk-double-bounce > span {
  position: relative;
  top: 95px;
  left: 5px;
  font-size: 20px;
}
  .sk-double-bounce .sk-child {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #333;
    opacity: 0.6;
    position: absolute;
    top: 0;
    left: 0;
    -webkit-animation: sk-doubleBounce 2s infinite ease-in-out;
            animation: sk-doubleBounce 2s infinite ease-in-out; }
  .sk-double-bounce .sk-double-bounce2 {
    -webkit-animation-delay: -1.0s;
            animation-delay: -1.0s; }

@-webkit-keyframes sk-doubleBounce {
  0%, 100% {
    -webkit-transform: scale(0);
            transform: scale(0); }
  50% {
    -webkit-transform: scale(1);
            transform: scale(1); } }
@keyframes sk-doubleBounce {
  0%, 100% {
    -webkit-transform: scale(0);
            transform: scale(0); }
  50% {
    -webkit-transform: scale(1);
            transform: scale(1); } }body {
}