/* --- Ouvrir les sous-menus au survol dans Cassiopeia --- */
.navbar-nav li.dropdown:hover > ul.dropdown-menu {
  display: block;
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

/* Ajuster l'animation et l'apparence */
.navbar-nav li.dropdown > ul.dropdown-menu {
  display: none;
  visibility: hidden;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.2s ease-in-out;
}

/* Optionnel : petit effet esthétique */
.navbar-nav li.dropdown:hover > a.nav-link {
  background-color: rgba(0,0,0,0.05);
}