.loading {
position: fixed;
top: 0;
 z-index: 999;
 height: 100%;
width: 100%;
 text-align: center;
background: #ffffff;
font-size: 18px;
visibility: hidden;
opacity: 0;
 -webkit-animation: loading 3s linear; 
 }
.loading img {
 margin-top: 100px;
 }
@-webkit-keyframes loading {
0%{opacity: 1;visibility: visible;}
90%{opacity: 1;}
100%{opacity: 0;visibility: visible;} 
}