#overlay {
  background: #ffffff;
  color: #666666;
  position: fixed;
  height: 100%;
  width: 100%;
  z-index: 5000;
  top: 0;
  left: 0;
  float: left;
  text-align: center;
  padding-top: 25%;
  opacity: .80;
}

.spinner {
  margin: 0 auto;
  height: 64px;
  width: 64px;
  animation: rotate 0.8s infinite linear;
  border: 5px solid #2092b6;
  border-right-color: transparent;
  border-radius: 50%;
}

@keyframes rotate {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}