diff --git a/resources/css/showcase.css b/resources/css/showcase.css
index 0dcfd750..7d378eca 100644
--- a/resources/css/showcase.css
+++ b/resources/css/showcase.css
@@ -476,6 +476,38 @@
         width: 100%;
         height: 100%;
     }
+
+    /* Bars: a bordered frame around one app-bar or docked-toolbar demo, matching the rounding a
+       real scaffold would clip its bar to. `visible` lets the search bar's docked suggestions
+       overflow it instead of clipping; `rounded` is the large-screen docked toolbar, which has no
+       edge of its own and only gains its padding from `expanded` (840px), M3's own condition for
+       the rounded (rather than square) docked toolbar. */
+    [data-md-showcase-bar-frame] {
+        width: 100%;
+        overflow: hidden;
+        border-radius: var(--md-sys-shape-corner-lg);
+        border: 1px solid var(--md-sys-color-outline-variant);
+    }
+
+    [data-md-showcase-bar-frame='visible'] {
+        overflow: visible;
+    }
+
+    [data-md-showcase-bar-frame='rounded'] {
+        border: 0;
+        background-color: var(--md-sys-color-surface);
+    }
+
+    @media (width >= 840px) {
+        [data-md-showcase-bar-frame='rounded'] {
+            padding: var(--md-sys-measurement-space200);
+        }
+    }
+
+    /* Bars: the scrollable-tabs demo needs a width narrow enough to force its own scroll. */
+    [data-md-showcase-tabs-narrow] {
+        max-width: 384px;
+    }
 }
 
 /* A handful of call sites (<x-input>, <x-datepicker>, <x-slider>) forward only `class` and
diff --git a/resources/views/showcase/sections/bars.blade.php b/resources/views/showcase/sections/bars.blade.php
index 5ead9279..f83528bd 100644
--- a/resources/views/showcase/sections/bars.blade.php
+++ b/resources/views/showcase/sections/bars.blade.php
@@ -1,8 +1,8 @@
 @php
     $examples = [
         'Top app bars' => <<<'BLADE'
-            <div class="grid w-full gap-4 [&>*]:overflow-hidden [&>*]:rounded-corner-lg [&>*]:border [&>*]:border-outline-variant">
-                <div>
+            <x-stack gap="space200" style="width: 100%;">
+                <div data-md-showcase-bar-frame>
                     <x-app-bar title="Shares" :sticky="false">
                         <x-slot:navigation><x-button icon="menu" tooltip="Open navigation" /></x-slot:navigation>
                         <x-slot:actions>
@@ -13,7 +13,7 @@
                 </div>
 
                 {{-- Resize the window: two icon buttons below 600px, four from there, the rest in "More options". --}}
-                <div>
+                <div data-md-showcase-bar-frame>
                     <x-app-bar title="holiday-photos" :sticky="false" :actions="[
                         ['label' => 'Share', 'icon' => 'share'],
                         ['label' => 'Download', 'icon' => 'download'],
@@ -25,39 +25,39 @@
                     </x-app-bar>
                 </div>
 
-                <div>
+                <div data-md-showcase-bar-frame>
                     <x-app-bar variant="center" title="holiday-photos.zip" subtitle="248 MB · expires in 3 days" :sticky="false">
                         <x-slot:navigation><x-button icon="arrow_back" tooltip="Back" /></x-slot:navigation>
                         <x-slot:actions><x-button icon="share" tooltip="Share" /></x-slot:actions>
                     </x-app-bar>
                 </div>
 
-                <div>
+                <div data-md-showcase-bar-frame>
                     <x-app-bar variant="medium" title="Recipients" subtitle="3 people" :sticky="false">
                         <x-slot:navigation><x-button icon="arrow_back" tooltip="Back" /></x-slot:navigation>
                         <x-slot:actions><x-button icon="person_add" tooltip="Add recipient" /></x-slot:actions>
                     </x-app-bar>
                 </div>
 
-                <div>
+                <div data-md-showcase-bar-frame>
                     <x-app-bar variant="large" title="Settings" :sticky="false">
                         <x-slot:navigation><x-button icon="arrow_back" tooltip="Back" /></x-slot:navigation>
                     </x-app-bar>
                 </div>
 
-                <div class="!overflow-visible">
-                    <x-app-bar variant="search" :sticky="false" class="rounded-corner-lg">
+                <div data-md-showcase-bar-frame="visible">
+                    <x-app-bar variant="search" :sticky="false" style="border-radius: var(--md-sys-shape-corner-lg);">
                         <x-slot:navigation><x-button icon="menu" tooltip="Open navigation" /></x-slot:navigation>
                         <x-search placeholder="Search shares" docked />
                         <x-slot:actions>
-                            <span class="mx-2 grid size-8 place-items-center rounded-corner-full bg-primary-container type-label-lg text-on-primary-container">AR</span>
+                            <span data-md-showcase-avatar class="md-type-label-lg">AR</span>
                         </x-slot:actions>
                     </x-app-bar>
                 </div>
-            </div>
+            </x-stack>
             BLADE,
         'Toolbars' => <<<'BLADE'
-            <div class="flex w-full flex-wrap items-center gap-6">
+            <x-row gap="space300" wrap align="center" style="width: 100%;">
                 <x-toolbar label="Formatting">
                     <x-button icon="format_bold" tooltip="Bold" :selected="true" />
                     <x-button icon="format_italic" tooltip="Italic" :selected="false" />
@@ -78,7 +78,7 @@
                     <x-button icon="zoom_in" tooltip-right="Zoom in" />
                 </x-toolbar>
 
-                <div class="w-full overflow-hidden rounded-corner-lg border border-outline-variant">
+                <div data-md-showcase-bar-frame>
                     <x-toolbar variant="docked" label="Selection">
                         <x-button icon="download" tooltip="Download" />
                         <x-button icon="share" tooltip="Share" />
@@ -87,7 +87,7 @@
                     </x-toolbar>
                 </div>
 
-                <div class="w-full overflow-hidden rounded-corner-lg border border-outline-variant">
+                <div data-md-showcase-bar-frame>
                     <x-toolbar variant="docked" label="Editing">
                         <x-button icon="check_box" tooltip="Select" />
                         <x-button icon="brush" tooltip="Draw" />
@@ -98,7 +98,7 @@
                 </div>
 
                 {{-- M3's docked toolbar on a large screen: rounded from 840px, its groups of controls divided. Narrower, it is the square docked bar. --}}
-                <div class="w-full overflow-hidden rounded-corner-lg bg-surface expanded:p-4">
+                <div data-md-showcase-bar-frame="rounded">
                     <x-toolbar variant="docked" rounded label="Text formatting">
                         <x-button icon="undo" tooltip="Undo" />
                         <x-button icon="redo" tooltip="Redo" />
@@ -109,10 +109,10 @@
                         <x-button icon="link" tooltip="Insert link" />
                     </x-toolbar>
                 </div>
-            </div>
+            </x-row>
             BLADE,
         'Primary tabs' => <<<'BLADE'
-            <div class="w-full space-y-8">
+            <x-stack gap="space400" style="width: 100%;">
                 <x-tabs :tabs="[['name' => 'files', 'label' => 'Files'], ['name' => 'recipients', 'label' => 'Recipients', 'badge' => 3], ['name' => 'activity', 'label' => 'Activity'], ['name' => 'settings', 'label' => 'Settings', 'disabled' => true]]">
                     <x-tab name="files">Three files, 248 MB.</x-tab>
                     <x-tab name="recipients">Anna, Ben and Chiara.</x-tab>
@@ -124,25 +124,25 @@
                     <x-tab name="photos">Only photos.</x-tab>
                     <x-tab name="videos">Only videos.</x-tab>
                 </x-tabs>
-            </div>
+            </x-stack>
             BLADE,
         'Secondary and scrollable tabs' => <<<'BLADE'
-            <div class="w-full space-y-8">
+            <x-stack gap="space400" style="width: 100%;">
                 <x-tabs variant="secondary" :tabs="[['name' => 'overview', 'label' => 'Overview'], ['name' => 'security', 'label' => 'Security', 'icon' => 'lock'], ['name' => 'billing', 'label' => 'Billing']]">
                     <x-tab name="overview">An overview of the account.</x-tab>
                     <x-tab name="security">Passwords and two-factor sign-in.</x-tab>
                     <x-tab name="billing">Plan and invoices.</x-tab>
                 </x-tabs>
 
-                <div class="max-w-sm">
+                <div data-md-showcase-tabs-narrow>
                     <x-tabs scrollable :tabs="collect(['January', 'February', 'March', 'April', 'May', 'June', 'July'])->map(fn ($month) => ['name' => strtolower($month), 'label' => $month])->all()">
                         <x-tab name="january">January's shares.</x-tab>
                     </x-tabs>
                 </div>
-            </div>
+            </x-stack>
             BLADE,
         'Section navigation, account menu and theme toggles' => <<<'BLADE'
-            <div class="w-full space-y-8">
+            <x-stack gap="space400" style="width: 100%;">
                 <x-section-nav :items="[
                     ['title' => 'Profile', 'icon' => 'person', 'url' => '#bars', 'active' => true],
                     ['title' => 'Security', 'icon' => 'lock', 'url' => '#bars'],
@@ -150,7 +150,7 @@
                     ['title' => 'Billing', 'icon' => 'credit_card', 'url' => '#bars'],
                 ]" no-wire-navigate />
 
-                <div class="flex flex-wrap items-center gap-4">
+                <x-row wrap align="center" gap="space200">
                     <x-account-menu name="Andreas Reinhold" email="andreas@example.com">
                         <x-menu-item label="Settings" icon="settings" link="#bars" no-wire-navigate />
                         <x-slot:footer>
@@ -161,20 +161,20 @@
                     <x-theme-toggle />
                     <x-theme-toggle mode="cycle" />
                     <x-theme-toggle mode="picker" />
-                </div>
-            </div>
+                </x-row>
+            </x-stack>
             BLADE,
     ];
 @endphp
 
-<section id="bars" class="scroll-mt-24 space-y-6">
-    <h2 class="type-headline-md">App bars, toolbars and tabs</h2>
+<x-livewire-material::stack as="section" id="bars" gap="space300">
+    <h2 class="md-type-headline-md">App bars, toolbars and tabs</h2>
 
-    <p class="max-w-3xl type-body-md text-on-surface-variant">
+    <p class="md-type-body-md md-ink-variant">
         <code>&lt;x-app-bar&gt;</code>, <code>&lt;x-toolbar&gt;</code>, <code>&lt;x-tabs&gt;</code>, <code>&lt;x-tab&gt;</code>, <code>&lt;x-section-nav&gt;</code>, <code>&lt;x-account-menu&gt;</code> and <code>&lt;x-theme-toggle&gt;</code>.
     </p>
 
     @foreach ($examples as $title => $code)
         <x-showcase::example :$title :$code />
     @endforeach
-</section>
+</x-livewire-material::stack>