@keyframes spin { 100% { -webkit-transform: rotate(360deg); transform:rotate(360deg); }} 
@keyframes fadeIn {0% {opacity: 0;} 100% { visibility: visible; opacity: 1; }}

@keyframes gmentermask {
  from {
    background-color: transparent;
  }
  to {
    background-color: rgba(0, 0, 0, 0.20);
  }
}

@keyframes gmleavemask {
  from {
    background-color: rgba(0, 0, 0, 0.20);
  }
  to {
    background-color: transparent;
  }
}