.overlay {
  align-items: center;
  box-sizing: border-box;
  color: #fff;
  display: none;
  flex: 1 1 100%;
  justify-content: space-around;
  left: 0;
  text-align: center;
  padding: 10px;
  position: fixed;
  top: 0;
  z-index: 1000;
}

.overlay.shown {
  display: flex !important;
}

.loader-overlay {
  background-color: rgba(255, 255, 255, 0.90);
}

.loader,
.loader:after {
  border-radius: 50%;
  height: 50px;
  width: 50px;
}

.loader {
  animation: spinner 1.1s infinite linear;

  /* Grey Loader */
  border-top:     10px solid rgba(175, 175, 183, 0.2);
  border-right:   10px solid rgba(175, 175, 183, 0.2);
  border-bottom:  10px solid rgba(175, 175, 183, 0.2);
  border-left:    10px solid rgba(175, 175, 183, 1);

  transform: translateZ(0);
}

@-webkit-keyframes spinner {
  0% {
    transform: rotate(0deg);
  }

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

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

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