@media (max-width: 1024px) {
  .stat-grid,
  .action-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .app,
  .app.is-collapsed {
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-h) 1fr;
    grid-template-areas:
      "header"
      "main";
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: min(288px, 86vw);
    transform: translateX(-102%);
    transition: transform var(--ease-move);
    border-right: 1px solid var(--border-strong);
  }

  .sidebar.is-open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-sidebar) - 1);
    background: var(--overlay);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--ease);
  }

  .sidebar-backdrop.is-visible {
    opacity: 1;
    pointer-events: auto;
  }

  .menu-btn {
    display: inline-flex;
  }

  .sidebar-footer {
    display: none;
  }

  .header {
    padding: 0 var(--space-3);
  }

  .search kbd,
  .header .btn-primary span {
    display: none;
  }

  .main {
    padding: var(--space-4);
    padding-bottom: calc(var(--bottom-nav-h) + var(--space-5));
  }

  .bottom-nav {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-header);
    height: var(--bottom-nav-h);
    padding-bottom: env(safe-area-inset-bottom);
    background: var(--sidebar);
    border-top: 1px solid var(--border);
  }

  .bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    color: var(--text-muted);
    font-size: 11px;
  }

  .bottom-nav a.is-active {
    color: var(--accent);
  }

  .insight-grid,
  .stat-grid,
  .action-grid {
    grid-template-columns: 1fr;
  }

  .page-title {
    font-size: 24px;
  }

  .notes-workspace {
    grid-template-columns: 1fr;
  }

  .notes-workspace.is-editing .notes-pane {
    display: none;
  }

  .notes-workspace:not(.is-editing) .editor-pane {
    display: none;
  }

  .editor-back {
    display: inline-flex;
  }

  .editor-title {
    font-size: 24px;
  }
}

@media (max-width: 390px) {
  .header-actions .icon-btn:nth-last-child(2) {
    display: none;
  }

  .search {
    min-width: 0;
  }
}