@keyframes spin {
  0% { transform: rotate(0deg); }
  to { transform: rotate(1turn); }
}

@keyframes slide-down {
  0%    { transform: translateY(-4rem); }
  10%   { transform: translateY(2rem); }
  90%   { transform: translateY(2rem); }
  100%  { transform: translateY(-4rem); }
}