.preload-wrapper {
  display: flex;
  flex-flow: column nowrap;
  justify-content: center;
  align-items: center;
  align-content: center;
  height: 100vh;
}

.preload-container,
.preload-a,
.preload-spin-base,
.preload-spin {
  width: 20vw;
  height: 20vw;
}

.preload-container {
  flex: 0 0 auto;
}

.preload-a,
.preload-spin-base,
.preload-spin {
  position: absolute;
}

@-webkit-keyframes spin {
  0% {
    -ms-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -ms-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@-moz-keyframes spin {
  0% {
    -ms-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -ms-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@-o-keyframes spin {
  0% {
    -ms-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -ms-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@keyframes spin {
  0% {
    -ms-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -ms-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

.preload-spin {
  -ms-transform-origin: 50% 50%;
  -webkit-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
  -webkit-animation: spin 1s 0s linear infinite;
  -moz-animation: spin 1s 0s linear infinite;
  -o-animation: spin 1s 0s linear infinite;
  animation: spin 1s 0s linear infinite;
}