body { background: #fafafa; }
.card { overflow: hidden; }
.navbar .nav-link { font-weight: 500; }

.ad-sidebar {
  position: sticky;
  top: 16px; /* distanza dal top quando scrolli */
}

@media (max-width: 991.98px) {
  .ad-sidebar {
    position: static; /* su mobile non sticky */
  }
}