.btn-facebook-login{
    background-color: #3D5B99;
    color: #ffffff;
    font-weight: bold
}

.loader {
    display: none;
    margin-top: 20px;
    border: 8px solid #f3f3f3;
    border-radius: 50%;
    border-top: 8px solid #212a45;
    width: 70px;
    height: 70px;
    -webkit-animation: spin 2s linear infinite; /* Safari */
    -moz-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}
  
  /* Safari */
@-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
}
  
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}