.fade-in {
  animation: fadeIn 0.8s forwards;
}

.fade-out {
  animation: fadeOut 0.8s forwards;
}

.etape-visible {
  display: block !important;
}

@keyframes fadeIn {
  0%   { opacity: 0; }
  100% { opacity: 1; }
}

@keyframes fadeOut {
  0%   { opacity: 1; }
  100% { opacity: 0; }
}