.loader {
  border: 16px solid #e8f5ef;
  border-radius: 50%;
  border-top: 16px solid #1287ff;
  width: 120px;
  height: 120px;
  -webkit-animation: spin 2s linear infinite; /* Safari */
  animation: spin 2s linear infinite;
  z-index:555555555;

    margin: 0;

    position: fixed;
    top: 40%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%)
  
}

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

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