.loader-wrap{
	position: fixed;
	width: 100%;
	height: 100%;
	left: 0;
	top: 0;
	background-color:  #4a4a4a;
	z-index: 500;
	display: none; 
}
.loader {
	display: block;
	position: relative;
	left: 50%;
	top: 50%;
	width: 30px;
	height: 30px;
	border: 4px solid #Fff;
	animation: loader 2s infinite ease;
}
.loader-inner {
  vertical-align: top;
  display: inline-block;
  width: 100%;
  background-color: #fff;
  animation: loader-inner 2s infinite ease-in;
}

@keyframes loader {
  0% {transform: rotate(0deg);} 
  25% {transform: rotate(180deg);}  
  50% {transform: rotate(180deg); }
  75% {transform: rotate(360deg);}
  100% {transform: rotate(360deg);}
}

@keyframes loader-inner {
  0% {height: 0%;}
  25% {height: 0%;}
  50% {height: 100%;}
  75% {height: 100%;}
  100% {height: 0%;}
}