/* Sidebar dropdown em overlay (não empurra itens para baixo) */
@media (min-width: 768px) {
   .sidebar .nav-item.dropdown { position: relative; }
   .sidebar .nav-item .dropdown-menu {
      position: absolute !important;
      top: 100% !important;
      left: 0 !important;
      margin: 0 !important;
      z-index: 1050;
      min-width: 100%;
      width: max-content;
      max-width: 280px;
      box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
   }
}