@media (max-width: 600px) {
  html, body { max-width: 100%; overflow-x: hidden; }
  aside { overflow: hidden; }
  nav { justify-content: flex-start; overflow-x: auto; overscroll-behavior-x: contain; }
  nav button { flex: 1 0 52px; min-width: 0; padding: 5px 4px; font-size: 10px; }
  .tools-grid, .lab-grid, .settings-grid, .practice-layout, .media-layout { grid-template-columns: minmax(0, 1fr); }
  .metadata-results, .form-grid { grid-template-columns: minmax(0, 1fr); }
  .field.wide { grid-column: auto; }
  .modal-backdrop { padding: 8px; }
  .stem-track { grid-template-columns: minmax(0, 1fr); }
  .analysis-stats { grid-template-columns: minmax(0, 1fr); }
}