/* flash message animations - header height is about 50px */
@keyframes expose {
  0%   { top : -100px; }
  15%  { top : 44px; }
  85%  { top : 44px; }
  100% { top : -100px; }
}

/* spinner animation */
@keyframes spinner {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}