.go-to-top a {
  background-color: #88a74a;
  box-shadow: 0 12px 35px -10px rgba(13, 71, 161, 0.55), 0 8px 10px -5px rgba(0, 0, 0, 0.09), 0 4px 25px -2px rgba(0, 0, 0, 0.14);
}

.go-to-top a:hover, .go-to-top a:focus {
  background-color: #87a649;
  box-shadow: 0 1px 9px 0 rgba(13, 71, 161, 0.5);
}