#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;

}

button {

  /* margin: 40px; */

  /* padding: 5px 20px; */

  cursor: pointer;

}

.spinner {

    margin: 0 auto;

    height: 64px;

    width: 64px;

    animation: rotate 0.8s infinite linear;

    border: 5px solid firebrick;

    border-right-color: transparent;

    border-radius: 50%;

}

@keyframes rotate {

    0% {

        transform: rotate(0deg);

    }

    100% {

        transform: rotate(360deg);

    }

}