.fade-in {
  animation: fadeInIRUK .3s ease-in-out;
}
@keyframes fadeInIRUK {
  from { opacity: 0.4; transform: translateY(2px); }
  to { opacity: 1; transform: translateY(0); }
}
button[disabled] {
  opacity: .6;
  cursor: not-allowed;
}