#load-div {
   width: 100%;
   height: 100%;
   top: 0;
   left: 0;
   position: fixed;
   display: block;
   opacity: 1;
   background-color: rgba(0, 0, 0, 0.7);
   z-index: 99;
   text-align: center;
}

.loading-div {
  border: 16px solid #fff;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  width: 50px;
  height: 50px;
  -webkit-animation: spin 2s linear infinite; /* Safari */
  animation: spin 2s linear infinite;
  position: absolute;
  top: 35%;
  left: 47%;
}

/* Safari */
@-webkit-keyframes spin {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

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