.loader {
  border: 16px solid #f3f3f3; /* Light grey */
  border-top: 16px solid #3498db; /* Blue */
  border-radius: 50%;
  width: 120px;
  height: 120px;
  animation: spin 2s linear infinite;
}

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

.pre-load {
	margin: 0;
	position: absolute;
	top: 50%;
	left: 50%;
	margin-right: -50%;
	transform: translate(-50%, -50%);
}