.desktop-nav-toggle { display: none; }
@media (min-width: 901px) {
  /* A compact icon button (see .icon-btn in app.css); its accessible name is aria-label. */
  .desktop-nav-toggle { display: inline-grid; flex-shrink: 0; }
  html[data-navigation="collapsed"] #sidebar { display: none; }
  html[data-navigation="collapsed"] .desktop-nav-toggle { color: var(--accent); }
}