.sidebar {
  background: #475ca8 !important;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}
.sidebar .nav,
.sidebar .sidebar-bottom { flex-shrink: 0; }
.sidebar-overlay::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 29;
  background: #14203a99;
}
@media (min-width: 721px) {
  .sidebar-overlay::before { display: none !important; }
}
@media (max-width: 720px) {
  .sidebar.open { z-index: 30; }
}