@media (max-width: 900px) {
  main { padding: 8px; }
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: 250px; max-width: 82vw; flex: none;
    z-index: 150; box-shadow: 6px 0 24px rgba(0,0,0,0.25);
  }
  .pin-btn { display: none; }
  body.nav-open::after {
    content: ''; position: fixed; inset: 0;
    background: rgba(0,0,0,0.35); z-index: 140;
  }
  header h1 { font-size: 13px; }
  header button { padding: 6px 8px; font-size: 11px; }
  .view { border-radius: 6px; }
  #treeWrap { min-height: 300px; }
  #formLayer {
    position: fixed; left: 8px; right: 8px;
    top: auto; bottom: 8px; width: auto;
    max-height: calc(100dvh - 16px);
    overflow-y: auto;
  }
  .node-card { width: 170px; }
  .node-card .card-actions .icon-btn { padding: 6px 10px; font-size: 15px; }
  .mini-card { width: 150px; }
}
@media (max-width: 500px) {
  header { padding: 6px 8px; gap: 6px; }
  header h1 { font-size: 12px; }
  header button { padding: 6px 7px; font-size: 11px; }
  .icon-btn { min-width: 34px; padding: 6px 8px; }
  /* Глубокая вложенность папок не должна съедать ширину телефона */
  .combo-folder-body { padding-left: 8px; }
  .combo-folder-actions .icon-btn { min-width: 26px; padding: 3px 4px; }
}