diff --git a/app/javascript/mastodon/features/navigation_panel/redesign/navigation_link.module.scss b/app/javascript/mastodon/features/navigation_panel/redesign/navigation_link.module.scss
index 3aec81ebb58..acf44c67ed4 100644
--- a/app/javascript/mastodon/features/navigation_panel/redesign/navigation_link.module.scss
+++ b/app/javascript/mastodon/features/navigation_panel/redesign/navigation_link.module.scss
@@ -61,6 +61,7 @@
 }
 
 .label {
+  max-width: 100%;
   min-width: 0;
   flex-grow: 1;
   flex-shrink: 1;
diff --git a/app/javascript/mastodon/features/navigation_panel/redesign/styles.module.scss b/app/javascript/mastodon/features/navigation_panel/redesign/styles.module.scss
index 52463424f55..43a4a3ccd4d 100644
--- a/app/javascript/mastodon/features/navigation_panel/redesign/styles.module.scss
+++ b/app/javascript/mastodon/features/navigation_panel/redesign/styles.module.scss
@@ -5,6 +5,7 @@
   flex-direction: column;
   height: 100%;
   overflow-y: auto;
+  scrollbar-width: thin;
 }
 
 .list {
diff --git a/app/javascript/mastodon/features/ui/components/columns_area.tsx b/app/javascript/mastodon/features/ui/components/columns_area.tsx
deleted file mode 100644
index 0a6eec74341..00000000000
--- a/app/javascript/mastodon/features/ui/components/columns_area.tsx
+++ /dev/null
@@ -1,213 +0,0 @@
-import {
-  Children,
-  cloneElement,
-  forwardRef,
-  isValidElement,
-  lazy,
-  Suspense,
-  useCallback,
-} from 'react';
-
-import classNames from 'classnames';
-
-import type { List, Record } from 'immutable';
-
-import { ColumnIndexContext } from '@/mastodon/components/column/context';
-import { useAppSelector } from '@/mastodon/store';
-import { isRedesignEnabled } from '@/mastodon/utils/environment';
-import { Footer } from 'mastodon/features/custom_homepage/components/footer';
-import { Header } from 'mastodon/features/custom_homepage/components/header';
-import { CollapsibleNavigationPanel } from 'mastodon/features/navigation_panel';
-
-import { useBreakpoint } from '../hooks/useBreakpoint';
-import {
-  Compose,
-  Notifications,
-  HomeTimeline,
-  CommunityTimeline,
-  PublicTimeline,
-  HashtagTimeline,
-  DirectTimeline,
-  FavouritedStatuses,
-  BookmarkedStatuses,
-  ListTimeline,
-  Directory,
-} from '../util/async-components';
-import { useColumnsContext } from '../util/columns_context';
-
-import Bundle from './bundle';
-import { BundleColumnError } from './bundle_column_error';
-import { ColumnLoading } from './column_loading';
-import { ComposePanel, RedirectToMobileComposeIfNeeded } from './compose_panel';
-import DrawerLoading from './drawer_loading';
-
-const LazyRedesignNavigationPanel = lazy(() =>
-  import('@/mastodon/features/navigation_panel/redesign').then(
-    ({ RedesignNavigationPanel }) => ({ default: RedesignNavigationPanel }),
-  ),
-);
-
-const componentMap = {
-  COMPOSE: Compose,
-  HOME: HomeTimeline,
-  NOTIFICATIONS: Notifications,
-  PUBLIC: PublicTimeline,
-  REMOTE: PublicTimeline,
-  COMMUNITY: CommunityTimeline,
-  HASHTAG: HashtagTimeline,
-  DIRECT: DirectTimeline,
-  FAVOURITES: FavouritedStatuses,
-  BOOKMARKS: BookmarkedStatuses,
-  LIST: ListTimeline,
-  DIRECTORY: Directory,
-} as const;
-
-const TabsBarPortal = () => {
-  const { setTabsBarElement } = useColumnsContext();
-
-  const setRef = useCallback(
-    (element: HTMLDivElement | null) => {
-      if (element) {
-        setTabsBarElement(element);
-      }
-    },
-    [setTabsBarElement],
-  );
-
-  return <div id='tabs-bar__portal' ref={setRef} />;
-};
-
-interface Column {
-  uuid: string;
-  id: keyof typeof componentMap;
-  params?: null | Record<{ other?: unknown }>;
-}
-
-type FetchedComponent = React.FC<{
-  columnId?: string;
-  multiColumn?: boolean;
-  params: unknown;
-}>;
-
-export const ColumnsArea = forwardRef<
-  HTMLDivElement,
-  {
-    singleColumn?: boolean;
-    minimalShell?: boolean;
-    children: React.ReactElement | React.ReactElement[];
-  }
->(({ children, minimalShell, singleColumn }, ref) => {
-  const renderComposePanel = !useBreakpoint('full');
-  const columns = useAppSelector(
-    (state) => state.settings.get('columns') as List<Record<Column>>,
-  );
-  const isModalOpen = useAppSelector(
-    (state) => !state.modal.get('stack').isEmpty(),
-  );
-
-  if (minimalShell) {
-    return (
-      <div className='columns-area__panels'>
-        <div className='columns-area__panels__main'>
-          <Header />
-
-          <div className='tabs-bar__wrapper'>
-            <TabsBarPortal />
-          </div>
-
-          <div className='columns-area columns-area--mobile'>{children}</div>
-
-          <Footer />
-        </div>
-      </div>
-    );
-  }
-
-  if (singleColumn) {
-    return (
-      <div className='columns-area__panels'>
-        <div className='columns-area__panels__pane columns-area__panels__pane--compositional'>
-          <div className='columns-area__panels__pane__inner'>
-            {isRedesignEnabled() ? (
-              <Suspense>
-                <LazyRedesignNavigationPanel />
-              </Suspense>
-            ) : (
-              <>
-                {renderComposePanel && <ComposePanel />}
-                <RedirectToMobileComposeIfNeeded />
-              </>
-            )}
-          </div>
-        </div>
-
-        <main className='columns-area__panels__main'>
-          <div className='tabs-bar__wrapper'>
-            <TabsBarPortal />
-          </div>
-
-          <div className='columns-area columns-area--mobile'>{children}</div>
-        </main>
-
-        <CollapsibleNavigationPanel />
-      </div>
-    );
-  }
-
-  return (
-    <main
-      className={classNames('columns-area', { unscrollable: isModalOpen })}
-      ref={ref}
-      tabIndex={isModalOpen ? undefined : 0}
-    >
-      {columns.map((column, index) => {
-        const params = column.get('params')
-          ? column.get('params')?.toJS()
-          : null;
-        const other = params?.other ?? {};
-        const uuid = column.get('uuid');
-        const id = column.get('id');
-
-        return (
-          <ColumnIndexContext.Provider value={index} key={uuid}>
-            <Bundle
-              key={uuid}
-              fetchComponent={componentMap[id]}
-              loading={renderLoading(id)}
-              error={ErrorComponent}
-            >
-              {(SpecificComponent: FetchedComponent) => (
-                <SpecificComponent
-                  columnId={uuid}
-                  params={params}
-                  multiColumn
-                  {...other}
-                />
-              )}
-            </Bundle>
-          </ColumnIndexContext.Provider>
-        );
-      })}
-
-      <ColumnIndexContext.Provider value={columns.size}>
-        {Children.map(children, (child) =>
-          isValidElement<{ multiColumn?: boolean }>(child)
-            ? cloneElement(child, { multiColumn: true })
-            : child,
-        )}
-      </ColumnIndexContext.Provider>
-    </main>
-  );
-});
-
-ColumnsArea.displayName = 'ColumnsArea';
-
-const ErrorComponent = (props: { onRetry: () => void }) => {
-  return <BundleColumnError multiColumn errorType='network' {...props} />;
-};
-
-const renderLoading = (columnId: string) => {
-  const LoadingComponent =
-    columnId === 'COMPOSE' ? <DrawerLoading /> : <ColumnLoading multiColumn />;
-  return () => LoadingComponent;
-};
diff --git a/app/javascript/mastodon/features/ui/components/columns_area/index.tsx b/app/javascript/mastodon/features/ui/components/columns_area/index.tsx
new file mode 100644
index 00000000000..c2dd3bfaa9d
--- /dev/null
+++ b/app/javascript/mastodon/features/ui/components/columns_area/index.tsx
@@ -0,0 +1,122 @@
+import { lazy, Suspense, useCallback } from 'react';
+
+import classNames from 'classnames';
+
+import { LoadingIndicator } from '@/mastodon/components/loading_indicator';
+import { Footer } from '@/mastodon/features/custom_homepage/components/footer';
+import { Header } from '@/mastodon/features/custom_homepage/components/header';
+import { CollapsibleNavigationPanel } from '@/mastodon/features/navigation_panel';
+import { useBreakpoint } from '@/mastodon/features/ui/hooks/useBreakpoint';
+import { useColumnsContext } from '@/mastodon/features/ui/util/columns_context';
+import { useAppSelector } from '@/mastodon/store';
+import { isRedesignEnabled } from '@/mastodon/utils/environment';
+
+import {
+  ComposePanel,
+  RedirectToMobileComposeIfNeeded,
+} from '../compose_panel';
+
+import { MultiColumnContent } from './multi_column_content';
+
+const LazyColumnsAreaRedesign = lazy(() =>
+  import('@/mastodon/features/ui/components/columns_area/redesign').then(
+    ({ ColumnsAreaRedesign }) => ({ default: ColumnsAreaRedesign }),
+  ),
+);
+
+const TabsBarPortal = () => {
+  const { setTabsBarElement } = useColumnsContext();
+
+  const setRef = useCallback(
+    (element: HTMLDivElement | null) => {
+      if (element) {
+        setTabsBarElement(element);
+      }
+    },
+    [setTabsBarElement],
+  );
+
+  return <div id='tabs-bar__portal' ref={setRef} />;
+};
+
+interface ColumnsAreaProps {
+  singleColumn?: boolean;
+  minimalShell?: boolean;
+  children: React.ReactElement | React.ReactElement[];
+  ref?: React.Ref<HTMLDivElement>;
+}
+
+const ColumnsAreaLegacy: React.FC<ColumnsAreaProps> = ({
+  children,
+  minimalShell,
+  singleColumn,
+  ref,
+}) => {
+  const renderComposePanel = !useBreakpoint('full');
+  const isModalOpen = useAppSelector(
+    (state) => !state.modal.get('stack').isEmpty(),
+  );
+
+  if (minimalShell) {
+    return (
+      <div className='columns-area__panels'>
+        <div className='columns-area__panels__main'>
+          <Header />
+
+          <div className='tabs-bar__wrapper'>
+            <TabsBarPortal />
+          </div>
+
+          <div className='columns-area columns-area--mobile'>{children}</div>
+
+          <Footer />
+        </div>
+      </div>
+    );
+  }
+
+  if (singleColumn) {
+    return (
+      <div className='columns-area__panels'>
+        <div className='columns-area__panels__pane columns-area__panels__pane--compositional'>
+          <div className='columns-area__panels__pane__inner'>
+            {renderComposePanel && <ComposePanel />}
+            <RedirectToMobileComposeIfNeeded />
+          </div>
+        </div>
+
+        <main className='columns-area__panels__main'>
+          <div className='tabs-bar__wrapper'>
+            <TabsBarPortal />
+          </div>
+
+          <div className='columns-area columns-area--mobile'>{children}</div>
+        </main>
+
+        <CollapsibleNavigationPanel />
+      </div>
+    );
+  }
+
+  return (
+    <main
+      className={classNames('columns-area', { unscrollable: isModalOpen })}
+      ref={ref}
+      tabIndex={isModalOpen ? undefined : 0}
+    >
+      <MultiColumnContent>{children}</MultiColumnContent>
+    </main>
+  );
+};
+
+export const ColumnsArea: React.FC<ColumnsAreaProps> = (props) => {
+  if (isRedesignEnabled()) {
+    return (
+      <Suspense fallback={<LoadingIndicator />}>
+        <LazyColumnsAreaRedesign {...props} />
+      </Suspense>
+    );
+  } else {
+    return <ColumnsAreaLegacy {...props} />;
+  }
+};
diff --git a/app/javascript/mastodon/features/ui/components/columns_area/multi_column_content.tsx b/app/javascript/mastodon/features/ui/components/columns_area/multi_column_content.tsx
new file mode 100644
index 00000000000..957d9d13f3f
--- /dev/null
+++ b/app/javascript/mastodon/features/ui/components/columns_area/multi_column_content.tsx
@@ -0,0 +1,109 @@
+import { Children, cloneElement, isValidElement } from 'react';
+
+import type { List, Record } from 'immutable';
+
+import { ColumnIndexContext } from '@/mastodon/components/column/context';
+import { useAppSelector } from '@/mastodon/store';
+
+import {
+  Compose,
+  Notifications,
+  HomeTimeline,
+  CommunityTimeline,
+  PublicTimeline,
+  HashtagTimeline,
+  DirectTimeline,
+  FavouritedStatuses,
+  BookmarkedStatuses,
+  ListTimeline,
+  Directory,
+} from '../../util/async-components';
+import Bundle from '../bundle';
+import { BundleColumnError } from '../bundle_column_error';
+import { ColumnLoading } from '../column_loading';
+import DrawerLoading from '../drawer_loading';
+
+const componentMap = {
+  COMPOSE: Compose,
+  HOME: HomeTimeline,
+  NOTIFICATIONS: Notifications,
+  PUBLIC: PublicTimeline,
+  REMOTE: PublicTimeline,
+  COMMUNITY: CommunityTimeline,
+  HASHTAG: HashtagTimeline,
+  DIRECT: DirectTimeline,
+  FAVOURITES: FavouritedStatuses,
+  BOOKMARKS: BookmarkedStatuses,
+  LIST: ListTimeline,
+  DIRECTORY: Directory,
+} as const;
+
+interface Column {
+  uuid: string;
+  id: keyof typeof componentMap;
+  params?: null | Record<{ other?: unknown }>;
+}
+
+type FetchedComponent = React.FC<{
+  columnId?: string;
+  multiColumn?: boolean;
+  params: unknown;
+}>;
+
+const ErrorComponent = (props: { onRetry: () => void }) => (
+  <BundleColumnError multiColumn errorType='network' {...props} />
+);
+
+const renderLoading = (columnId: string) => {
+  const LoadingComponent =
+    columnId === 'COMPOSE' ? <DrawerLoading /> : <ColumnLoading multiColumn />;
+  return () => LoadingComponent;
+};
+
+export const MultiColumnContent: React.FC<{
+  children: React.ReactElement | React.ReactElement[];
+}> = ({ children }) => {
+  const columns = useAppSelector(
+    (state) => state.settings.get('columns') as List<Record<Column>>,
+  );
+  return (
+    <>
+      {columns.map((column, index) => {
+        const params = column.get('params')
+          ? column.get('params')?.toJS()
+          : null;
+        const other = params?.other ?? {};
+        const uuid = column.get('uuid');
+        const id = column.get('id');
+
+        return (
+          <ColumnIndexContext.Provider value={index} key={uuid}>
+            <Bundle
+              key={uuid}
+              fetchComponent={componentMap[id]}
+              loading={renderLoading(id)}
+              error={ErrorComponent}
+            >
+              {(SpecificComponent: FetchedComponent) => (
+                <SpecificComponent
+                  columnId={uuid}
+                  params={params}
+                  multiColumn
+                  {...other}
+                />
+              )}
+            </Bundle>
+          </ColumnIndexContext.Provider>
+        );
+      })}
+
+      <ColumnIndexContext.Provider value={columns.size}>
+        {Children.map(children, (child) =>
+          isValidElement<{ multiColumn?: boolean }>(child)
+            ? cloneElement(child, { multiColumn: true })
+            : child,
+        )}
+      </ColumnIndexContext.Provider>
+    </>
+  );
+};
diff --git a/app/javascript/mastodon/features/ui/components/columns_area/redesign.module.scss b/app/javascript/mastodon/features/ui/components/columns_area/redesign.module.scss
new file mode 100644
index 00000000000..73c6078a0b1
--- /dev/null
+++ b/app/javascript/mastodon/features/ui/components/columns_area/redesign.module.scss
@@ -0,0 +1,56 @@
+@use '@/styles/mastodon/variables' as *;
+
+.root {
+  --main-column-max-width: 640px;
+  --navigation-min-width: 280px;
+  --navigation-max-width: 360px;
+
+  box-sizing: border-box;
+  width: 100%;
+  height: 100%;
+  min-height: 100vh;
+  min-height: 100dvh;
+  padding-bottom: env(safe-area-inset-bottom);
+
+  @media (min-width: $no-gap-breakpoint) {
+    padding-inline: var(--space-2xs);
+  }
+
+  @media (min-width: $mobile-menu-breakpoint) {
+    display: grid;
+    grid-template-columns:
+      minmax(var(--navigation-min-width), 1fr)
+      minmax(0, var(--main-column-max-width))
+      minmax(0, 1fr);
+    gap: var(--space-xs);
+  }
+}
+
+.navigationWrapper {
+  position: sticky;
+  top: 0;
+  z-index: 1;
+  max-width: var(--navigation-max-width);
+  height: 100dvh;
+  padding-bottom: env(safe-area-inset-bottom);
+
+  @media (max-width: ($mobile-menu-breakpoint - 1)) {
+    display: none;
+  }
+}
+
+.main {
+  box-sizing: border-box;
+  display: flex;
+  flex-direction: column;
+  flex: 0 1 auto;
+  width: 100%;
+  contain: inline-size layout paint style;
+  container: column / inline-size;
+  color: var(--color-text-primary);
+  background-color: var(--color-bg-primary);
+
+  @media ($mobile-menu-breakpoint < width < $no-gap-breakpoint) {
+    border-inline: 1px solid var(--color-border-primary);
+  }
+}
diff --git a/app/javascript/mastodon/features/ui/components/columns_area/redesign.tsx b/app/javascript/mastodon/features/ui/components/columns_area/redesign.tsx
new file mode 100644
index 00000000000..00a32c7e099
--- /dev/null
+++ b/app/javascript/mastodon/features/ui/components/columns_area/redesign.tsx
@@ -0,0 +1,90 @@
+import { useCallback } from 'react';
+
+import classNames from 'classnames';
+
+import { CollapsibleNavigationPanel } from '@/mastodon/features/navigation_panel';
+import { RedesignNavigationPanel } from '@/mastodon/features/navigation_panel/redesign';
+import { useAppSelector } from '@/mastodon/store';
+import { Footer } from 'mastodon/features/custom_homepage/components/footer';
+import { Header } from 'mastodon/features/custom_homepage/components/header';
+
+import { useBreakpoint } from '../../hooks/useBreakpoint';
+import { useColumnsContext } from '../../util/columns_context';
+
+import { MultiColumnContent } from './multi_column_content';
+import classes from './redesign.module.scss';
+
+const TabsBarPortal = () => {
+  const { setTabsBarElement } = useColumnsContext();
+
+  const setRef = useCallback(
+    (element: HTMLDivElement | null) => {
+      if (element) {
+        setTabsBarElement(element);
+      }
+    },
+    [setTabsBarElement],
+  );
+
+  return <div id='tabs-bar__portal' ref={setRef} />;
+};
+
+export const ColumnsAreaRedesign: React.FC<{
+  singleColumn?: boolean;
+  minimalShell?: boolean;
+  children: React.ReactElement | React.ReactElement[];
+  ref?: React.Ref<HTMLDivElement>;
+}> = ({ children, minimalShell, singleColumn, ref }) => {
+  const isModalOpen = useAppSelector(
+    (state) => !state.modal.get('stack').isEmpty(),
+  );
+  const renderLegacyNavForMobile = useBreakpoint('openable');
+
+  if (minimalShell) {
+    return (
+      <div className={classes.root}>
+        <div className={classes.main}>
+          <Header />
+
+          <div className='tabs-bar__wrapper'>
+            <TabsBarPortal />
+          </div>
+
+          <div className='columns-area columns-area--mobile'>{children}</div>
+
+          <Footer />
+        </div>
+      </div>
+    );
+  }
+
+  if (singleColumn) {
+    return (
+      <div className={classes.root}>
+        <div className={classes.navigationWrapper}>
+          <RedesignNavigationPanel />
+        </div>
+
+        <main className={classes.main}>
+          <div className='tabs-bar__wrapper'>
+            <TabsBarPortal />
+          </div>
+
+          <div className='columns-area columns-area--mobile'>{children}</div>
+
+          {renderLegacyNavForMobile && <CollapsibleNavigationPanel />}
+        </main>
+      </div>
+    );
+  }
+
+  return (
+    <main
+      className={classNames('columns-area', { unscrollable: isModalOpen })}
+      ref={ref}
+      tabIndex={isModalOpen ? undefined : 0}
+    >
+      <MultiColumnContent>{children}</MultiColumnContent>
+    </main>
+  );
+};