.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;} 
}