img {
  width: 300px;
}

.body_overlay{
    /*background-color:#9c9c9c;*/
    /*background-color:#ffffffc;*/
    position: fixed;
    width: 300px;
    height: 300px;
    z-index: 1000;
    top: 0px;
    left: 0px;
    opacity: 50%; /* in FireFox */
    filter: alpha(opacity=50); /* in IE */
    pointer-events:none;
}

.loader {
  border: 16px solid #f3f3f3; /* Light grey */
  border-top: 16px solid #3498db; /* Blue */
  border-radius: 50%;
  width: 180px;
  height: 180px;
  animation: spin 2s linear infinite;
  position: absolute;
  top: 40%;
  left: 40%;
  transform: translate(-50%, -50%);
  
}

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