.sombra_cards {
  box-shadow: 0 6px 18px rgba(0,0,0,.18);
}

.nav-link.morpho-active {
  background: rgba(255,255,255,.08);
  border-left: 3px solid #ffc107; /* “warning” */
  border-radius: .5rem;
  padding-left: .5rem;
}