.body-preloading {
  display: flex;
  height: 100%;
  width: 100%;
  align-content: center;
  align-items: center;
  justify-content: center;
  background: #fff;
  z-index: 100;
  position: absolute;
  opacity: 1;
  -webkit-transition: opacity 500ms linear;
  transition: opacity 500ms linear;
}

.logo-preloading {
  width: 135px;
  height: 135px;
  background-size: cover;
  background-position-x: 50%;
  background-repeat: no-repeat;
  z-index: 100;
  background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAA1JREFUGFdj+P/v338ACfYD+1f+exsAAAAASUVORK5CYII=');
  -webkit-animation: flickerAnimation 1.2s infinite linear;
  -moz-animation: flickerAnimation 1.2s infinite linear;
  -o-animation: flickerAnimation 1.2s infinite linear;
  animation: flickerAnimation 1.2s infinite linear;
}

@keyframes flickerAnimation {
  0% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }

  100% {
    opacity: 1;
  }
}

@-o-keyframes flickerAnimation {
  0% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }

  100% {
    opacity: 1;
  }
}

@-moz-keyframes flickerAnimation {
  0% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }

  100% {
    opacity: 1;
  }
}

@-webkit-keyframes flickerAnimation {
  0% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }

  100% {
    opacity: 1;
  }
}