.loading {
  position: fixed;
  top: 0; right: 0;
  bottom: 0; left: 0;
}

.loader {
  left: 50%;
  margin-left: -4em;
  font-size: 10px;
  border: .8em solid #5A5A5A;
  border-left: .8em solid #EF2637;
  animation: spin 1.1s infinite linear;
}

.loader, .loader:after {
  border-radius: 50%;
  width: 8em;
  height: 8em;
  display: block;
  position: absolute;
  top: 50%;
  margin-top: -4.05em;
}

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