Draw the snackbar host without Tailwind

Plan step 36 (actions). <x-toast> renders data-md-toast with
data-md-position, its snackbar data-md-toast-snackbar with a bound
data-md-two-line, data-md-toast-content with a bound
data-md-toast-wrap, and data-md-toast-action/-dismiss; no class list.
toast.css draws SnackbarTokens' inverse surface, 48/68px container,
the two 40px controls reaching 48px targets with their own state
layer and touch target (ACT-18), the enter transition and the
position-start margin that grows from medium.

data-toast becomes data-md-toast-snackbar and data-toast-action
becomes data-md-toast-action (snackbar.js, navigation.js's
hide-on-scroll guard, NavigationBarTest, CommunicationTest); a new
data-md-toast-dismiss hook names the close button. ToastTest is
rewritten on the hooks and ComponentStylesheet. CommunicationTest
gains the owed tests: an actioned snackbar past the default timeout,
Escape on a focused one, the live region before any message, and the
two-line height with Alt+G reaching the action from elsewhere on the
page.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

resources/css/components.css

@@ -27,6 +27,7 @@
 @import './components/fab-menu-item.css';
 @import './components/fab-menu.css';
 @import './components/rich-tooltip.css';
+@import './components/toast.css';
 
 /* Inputs, selection and data */
 @import './components/form.css';

resources/css/components/toast.css

@@ -0,0 +1,183 @@
+/*
+ * <x-toast>: the snackbar host — shows every toast queued behind it, one at a time.
+ *
+ * SnackbarTokens (androidx Compose Material 3, Apache-2.0): inverse-surface container,
+ * inverse-on-surface text, an inverse-primary action, extra-small corners, elevation 3, 48px for
+ * one line and 68px for two (SnackbarTokens.TwoLinesContainerHeight — the more precise of M3's
+ * two published figures; the site's prose says 64dp). `[data-md-two-line]`, bound from whether
+ * the current toast carries a description, pins the container to 68px instead of leaving it to
+ * grow into it; below `medium` (600px), a two-line snackbar with an action wraps the action under
+ * the text through `[data-md-toast-wrap]`, bound the same way — M3's "two lines with longer
+ * action" configuration.
+ *
+ * It lifts above a bottom bar through `--material-bottom-bar`; `data-md-position="bottom-start"`
+ * moves it to the start edge, with M3's margin growing from `medium`. resources/js/snackbar.js
+ * publishes the snackbar's own height as `--material-snackbar-height`, so a FAB (fab.css) can
+ * lift clear of it — M3 puts a snackbar above a FAB, never in front of or behind one (ACT-17).
+ * Below `medium` it is full width; from there it hugs its line length, which an application's own
+ * class can still bound.
+ *
+ * The action and the close button are both drawn at 40px but reach M3's 48px target (ACT-18) with
+ * the same `::after` touch target the shared classes use (foundation/interaction.css); they draw
+ * their own state layer and focus ring instead of those classes because the action's ink is
+ * inverse-primary, not the button's inherited inverse-on-surface.
+ *
+ * It enters on a translate and a fade on the fast spatial spring, `@starting-style` giving both a
+ * start. No state icon: M3 says to avoid one in a snackbar (ACT-20). The live region is the host
+ * itself, in the page before any message is, never the snackbar that comes and goes (ACT-02);
+ * resources/js/snackbar.js queues, times and dismisses a toast, including on Escape while it
+ * holds the focus and on Alt+G, which moves the focus to one carrying an action (ACT-34).
+ */
+
+@layer material.reset, material.tokens, material.base, material.layout, material.components, material.text, material.visibility;
+
+@import './icon.css';
+
+@layer material.components {
+    [data-md-toast] {
+        position: fixed;
+        z-index: 50;
+        inset-inline: var(--md-sys-measurement-space200);
+        bottom: calc(var(--material-bottom-bar, 0px) + var(--md-sys-measurement-space200));
+        display: flex;
+        justify-content: center;
+        pointer-events: none;
+    }
+
+    [data-md-toast][data-md-position='bottom-start'] {
+        justify-content: flex-start;
+    }
+
+    @media (width >= 600px) {
+        [data-md-toast][data-md-position='bottom-start'] {
+            inset-inline-start: var(--md-sys-measurement-space300);
+        }
+    }
+
+    [data-md-toast-snackbar] {
+        pointer-events: auto;
+        display: flex;
+        flex-wrap: wrap;
+        align-items: center;
+        gap: 12px;
+        width: 100%;
+        max-width: min(100%, 576px);
+        min-height: var(--md-sys-measurement-space600);
+        border-radius: var(--md-sys-shape-corner-xs);
+        padding-block: 6px;
+        padding-inline: var(--md-sys-measurement-space200) var(--md-sys-measurement-space100);
+        background-color: var(--md-sys-color-inverse-surface);
+        color: var(--md-sys-color-inverse-on-surface);
+        box-shadow: var(--md-sys-elevation-3);
+        translate: 0;
+        opacity: 1;
+        transition-property: translate, opacity;
+        transition-duration: var(--md-sys-motion-spatial-fast-duration);
+        transition-timing-function: var(--md-sys-motion-spatial-fast);
+
+        @starting-style {
+            translate: 0 16px;
+            opacity: 0;
+        }
+    }
+
+    [data-md-toast-snackbar][data-md-two-line] {
+        min-height: 68px;
+    }
+
+    @media (width >= 600px) {
+        [data-md-toast-snackbar] {
+            width: auto;
+            min-width: 344px;
+        }
+    }
+
+    [data-md-toast-content] {
+        min-width: 0;
+        flex: 1 1 auto;
+        padding-block: 6px;
+    }
+
+    @media (width < 600px) {
+        [data-md-toast-content][data-md-toast-wrap] {
+            flex-basis: 100%;
+        }
+    }
+
+    [data-md-toast-title],
+    [data-md-toast-description] {
+        font: var(--md-sys-typescale-body-md);
+        letter-spacing: var(--md-sys-typescale-body-md-tracking);
+        font-variation-settings: normal;
+    }
+
+    :is([data-md-toast-action], [data-md-toast-dismiss]) {
+        position: relative;
+        isolation: isolate;
+        flex-shrink: 0;
+        border-radius: var(--md-sys-shape-corner-full);
+        cursor: pointer;
+        outline: none;
+
+        &::before {
+            content: '';
+            position: absolute;
+            inset: 0;
+            z-index: -1;
+            border-radius: inherit;
+            background-color: currentColor;
+            opacity: 0;
+            pointer-events: none;
+            transition: opacity var(--md-sys-motion-effects-fast-duration) var(--md-sys-motion-effects-fast);
+        }
+
+        &::after {
+            content: '';
+            position: absolute;
+            top: 50%;
+            left: 50%;
+            width: 100%;
+            height: 100%;
+            min-width: var(--md-sys-measurement-space600);
+            min-height: var(--md-sys-measurement-space600);
+            translate: -50% -50%;
+        }
+
+        @media (hover: hover) {
+            &:hover::before {
+                opacity: var(--md-sys-state-hover-state-layer-opacity);
+            }
+        }
+
+        &:focus-visible {
+            outline: 3px solid var(--md-sys-color-secondary);
+            outline-offset: 2px;
+        }
+
+        &:focus-visible::before {
+            opacity: var(--md-sys-state-focus-state-layer-opacity);
+        }
+
+        &:active::before {
+            opacity: var(--md-sys-state-pressed-state-layer-opacity);
+        }
+    }
+
+    [data-md-toast-action] {
+        margin-inline-start: auto;
+        height: var(--md-sys-measurement-space500);
+        padding-inline: 12px;
+        color: var(--md-sys-color-inverse-primary);
+        font: var(--md-sys-typescale-label-lg);
+        letter-spacing: var(--md-sys-typescale-label-lg-tracking);
+        font-variation-settings: normal;
+    }
+
+    [data-md-toast-dismiss] {
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
+        width: var(--md-sys-measurement-space500);
+        height: var(--md-sys-measurement-space500);
+    }
+}

resources/js/navigation.js

@@ -283,4 +283,4 @@ document.addEventListener('alpine:init', () => {
  * snackbar (`<x-toast>`'s, which reads --material-bottom-bar), or a bottom sheet or drawer over the
  * page. M3 lets those cover the bar; it is the bar leaving from under them that looks broken.
  */
-const anchored = () => [...document.querySelectorAll('[data-toast], [role="dialog"]')].some((over) => over.getClientRects().length > 0)
+const anchored = () => [...document.querySelectorAll('[data-md-toast-snackbar], [role="dialog"]')].some((over) => over.getClientRects().length > 0)

resources/js/snackbar.js

@@ -60,7 +60,7 @@ document.addEventListener('alpine:init', () => {
                 // itself, so without one the keyboard cannot reach the action at all. `event.code`
                 // rather than `event.key`, which Alt rewrites to another character on some layouts.
                 if (event.altKey && !event.ctrlKey && !event.metaKey && event.code === 'KeyG') {
-                    const action = this.$el.querySelector('[data-toast-action]')
+                    const action = this.$el.querySelector('[data-md-toast-action]')
 
                     if (action) {
                         event.preventDefault()
@@ -142,7 +142,7 @@ document.addEventListener('alpine:init', () => {
          */
         measure() {
             this.$nextTick(() => {
-                const snackbar = this.$el.querySelector('[data-toast]')
+                const snackbar = this.$el.querySelector('[data-md-toast-snackbar]')
                 const root = document.documentElement.style
 
                 if (snackbar) {

resources/views/components/toast.blade.php

@@ -18,26 +18,27 @@
 
      The live region is the host itself, not the snackbar: a region must be in the page before its
      contents change for a screen reader to announce them reliably, and the snackbar comes and
-     goes. It is `aria-live="polite" aria-atomic="true"`, as M3 asks for a snackbar (never
+     goes (ACT-02). It is `aria-live="polite" aria-atomic="true"`, as M3 asks for a snackbar
-     assertive); a `type` picks the region's role — `alert` for an error or a warning, `status`
+     (never assertive); a `type` picks the region's role — `alert` for an error or a warning,
-     otherwise — and the explicit `aria-live` keeps even those polite.
+     `status` otherwise — and the explicit `aria-live` keeps even those polite.
 
-     Hooks for tests and styling: `data-toast` on the snackbar on screen, `data-toast-action` on its
+     Hooks for tests and styling: `data-md-toast` on the host, `data-md-toast-snackbar` on the
-     action button.
+     snackbar on screen, `data-md-toast-action` on its action button and `data-md-toast-dismiss`
+     on its close button. Drawn by resources/css/components/toast.css.
 
      `@persist` keeps the host across wire:navigate, so a toast dispatched with `redirectTo` is
      still on screen when the next page arrives.
 
      There is no state icon: M3 says to avoid one in a snackbar ("use a dialog instead if an icon
-     feels necessary"), and both lines of the message are plain inverse-on-surface — M3 gives the
+     feels necessary", ACT-20), and both lines of the message are plain inverse-on-surface — M3
-     supporting text no fourth colour and tells the two lines apart by position. The 40px action
+     gives the supporting text no fourth colour and tells the two lines apart by position. The
-     and close buttons carry `touch-target`, which reaches M3's 48px without growing the container.
+     40px action and close buttons reach M3's 48px target without growing the container (ACT-18).
-     Escape dismisses a snackbar that holds the focus.
+     Escape dismisses a snackbar that holds the focus (ACT-34).
 
      Alt+G moves the focus to a snackbar that carries an action, from wherever the page had it —
      M3 asks for a documented shortcut on the web, since a snackbar never takes the focus itself
-     and a keyboard has no other way to reach one. It does nothing when the snackbar on screen has
+     and a keyboard has no other way to reach one (ACT-34). It does nothing when the snackbar on
-     no action.
+     screen has no action.
 
      M3's snackbar (SnackbarTokens, androidx Compose Material 3, Apache-2.0): inverse surface,
      body-medium text, a label-large action in inverse-primary, extra-small corners, elevation 3,
@@ -45,14 +46,19 @@
      says 64dp, and the token is the more precise of the two). A description is that second line,
      so the container is pinned to 68px whenever one is there rather than left to grow into it. On
      a compact window a two-line snackbar with an action wraps the action below the text, which is
-     the third of M3's five snackbar configurations ("two lines with longer action"). `position`: `bottom` (centred, the default) or `bottom-start`. It lifts
+     the third of M3's five snackbar configurations ("two lines with longer action"). `position`:
-     above a bottom bar through `--material-bottom-bar`, and publishes its own height as
+     `bottom` (centred, the default) or `bottom-start`. It lifts above a bottom bar through
-     `--material-snackbar-height` so a FAB can lift clear of it — M3: a snackbar appears above a
+     `--material-bottom-bar`, and publishes its own height as `--material-snackbar-height` so a
-     FAB, never in front of or behind one. A compact window (below `medium`, 600px) gets the
+     FAB can lift clear of it — M3: a snackbar appears above a FAB, never in front of or behind
-     full-width snackbar; from `medium` it hugs its line length instead, as M3 asks. --}}
+     one (ACT-17). A compact window (below `medium`, 600px) gets the full-width snackbar; from
+     `medium` it hugs its line length instead, as M3 asks. --}}
 
 @props(['position' => 'bottom'])
 
+@php
+    $position = in_array($position, ['bottom', 'bottom-start'], true) ? $position : 'bottom';
+@endphp
+
 @persist('material-toast')
     <div
         x-data="materialSnackbar"
@@ -60,35 +66,32 @@
         role="status"
         aria-live="polite"
         aria-atomic="true"
-        {{ $attributes->class([
+        data-md-toast
-            'pointer-events-none fixed inset-x-4 z-50 flex bottom-[calc(var(--material-bottom-bar,0px)+1rem)]',
+        data-md-position="{{ $position }}"
-            'justify-center' => $position !== 'bottom-start',
+        {{ $attributes }}
-            'justify-start medium:start-6' => $position === 'bottom-start',
-        ]) }}
     >
         <template x-if="current">
             <div
                 x-bind:key="current.id"
-                data-toast
+                data-md-toast-snackbar
+                x-bind:data-md-two-line="current.description ? '' : null"
                 x-on:mouseenter="pause()"
                 x-on:mouseleave="resume()"
                 x-on:focusin="pause()"
                 x-on:focusout="resume()"
-                x-bind:class="current.description ? 'min-h-17' : 'min-h-12'"
-                class="pointer-events-auto flex w-full max-w-[min(100%,36rem)] flex-wrap items-center gap-3 rounded-corner-xs bg-inverse-surface py-1.5 ps-4 pe-2 text-inverse-on-surface shadow-elevation-3 transition-[translate,opacity] duration-(--md-sys-motion-spatial-fast-duration) ease-spatial-fast starting:translate-y-4 starting:opacity-0 medium:w-auto medium:min-w-86"
             >
-                <div x-bind:class="current.description && current.action ? 'max-medium:basis-full' : ''" class="min-w-0 flex-1 py-1.5">
+                <div data-md-toast-content x-bind:data-md-toast-wrap="current.description && current.action ? '' : null">
-                    <p class="type-body-md" x-text="current.title"></p>
+                    <p data-md-toast-title x-text="current.title"></p>
-                    <p class="type-body-md" x-show="current.description" x-text="current.description"></p>
+                    <p data-md-toast-description x-show="current.description" x-text="current.description"></p>
                 </div>
 
                 <template x-if="current.action">
-                    <button type="button" data-toast-action class="state-layer focus-ring touch-target ms-auto h-10 shrink-0 rounded-corner-full px-3 type-label-lg text-inverse-primary" x-text="current.action.label" x-on:click="act()"></button>
+                    <button type="button" data-md-toast-action x-text="current.action.label" x-on:click="act()"></button>
                 </template>
 
                 <template x-if="current.action || ! current.timeout">
-                    <button type="button" class="state-layer focus-ring touch-target inline-flex size-10 shrink-0 items-center justify-center rounded-corner-full" aria-label="{{ __('Dismiss') }}" x-on:click="dismiss()">
+                    <button type="button" data-md-toast-dismiss aria-label="{{ __('Dismiss') }}" x-on:click="dismiss()">
-                        <x-livewire-material::icon name="close" optical="20" class="size-5" />
+                        <x-livewire-material::icon name="close" size="20" />
                     </button>
                 </template>
             </div>

tests/Browser/CommunicationTest.php

@@ -42,7 +42,7 @@ class RichTooltipMorphProbe extends Component
 // The live region is the host itself, in the page before any message is (actions.md ACT-02).
 const SNACKBAR = "document.querySelector('[x-data=\"materialSnackbar\"][aria-live]')";
 
-const TOAST = "document.querySelector('[data-toast]')";
+const TOAST = "document.querySelector('[data-md-toast-snackbar]')";
 
 it('shows a toast as a snackbar, then the next in turn', function () {
     $page = visit('/material/communication')->waitForEvent('networkidle')
@@ -90,7 +90,7 @@ it('does not let a toast dismissed early cut the next one short', function () {
 
     // A click with no hover or focus before it, as a screen reader activates a button: nothing has
     // paused the first toast's timer.
-    $page->script("document.querySelector('[data-toast] button[aria-label=\"Dismiss\"]').click()");
+    $page->script("document.querySelector('[data-md-toast-dismiss]').click()");
 
     $page->assertScript(TOAST."?.textContent.includes('Link copied')")
         ->wait(1.2);
@@ -117,7 +117,7 @@ it('keeps a sticky toast aside while a passing one shows, brings back the newest
 
     $page->assertScript(TOAST."?.textContent.includes('Version 2 is ready')");
 
-    $page->click('[data-toast] button[aria-label="Dismiss"]')
+    $page->click('[data-md-toast-dismiss]')
         ->assertScript(TOAST.' === null');
 
     // Dismissed rather than left to time out: the pointer still rests where the snackbar appears,
@@ -125,7 +125,7 @@ it('keeps a sticky toast aside while a passing one shows, brings back the newest
     $page->script("window.eval(\"materialToast('Link copied', { timeout: 0 })\")");
 
     $page->assertScript(TOAST."?.textContent.includes('Link copied')")
-        ->click('[data-toast] button[aria-label="Dismiss"]')
+        ->click('[data-md-toast-dismiss]')
         ->assertScript(TOAST.' === null');
 });
 
@@ -135,12 +135,65 @@ it('dispatches a toast action\'s window event alongside its handler, and closes'
 
     $page->script("window.eval(\"window.reloads = 0; window.handled = 0; window.addEventListener('material:test-reload', () => window.reloads++); materialToast('A new version is ready', { sticky: true, action: { label: 'Reload', event: 'material:test-reload', handler: () => window.handled++ } })\")");
 
-    $page->click('[data-toast-action]')
+    $page->click('[data-md-toast-action]')
         ->assertScript(TOAST.' === null')
         ->assertScript("window.eval('window.reloads') === 1")
         ->assertScript("window.eval('window.handled') === 1");
 });
 
+it('keeps an actioned snackbar on screen past the default timeout, until it is acted on', function () {
+    $page = visit('/material/communication')->waitForEvent('networkidle')
+        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+
+    // No timeout written out: M3 forbids an actioned snackbar from auto-dismissing (ACT-03).
+    $page->script("materialToast('Share deleted', { action: { label: 'Undo', handler: () => {} } })");
+
+    $page->assertScript(TOAST."?.textContent.includes('Share deleted')")
+        ->wait(4.5);
+
+    $page->assertScript(TOAST."?.textContent.includes('Share deleted')")
+        ->click('[data-md-toast-dismiss]')
+        ->assertScript(TOAST.' === null');
+});
+
+it('dismisses a focused snackbar with Escape', function () {
+    $page = visit('/material/communication')->waitForEvent('networkidle')
+        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+
+    $page->script("materialToast('Share deleted', { action: { label: 'Undo', handler: () => {} } })");
+
+    $page->assertScript(TOAST."?.textContent.includes('Share deleted')")
+        ->script("document.querySelector('[data-md-toast-dismiss]').focus()")
+        ->keys(':focus', 'Escape')
+        ->assertScript(TOAST.' === null');
+});
+
+it('keeps the snackbar\'s live region in the page, polite, before any message arrives', function () {
+    $page = visit('/material/communication')->waitForEvent('networkidle')
+        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+
+    $page->assertScript(SNACKBAR.' !== null')
+        ->assertScript(SNACKBAR."?.getAttribute('aria-live') === 'polite'")
+        ->assertScript(SNACKBAR."?.getAttribute('aria-atomic') === 'true'")
+        ->assertScript(TOAST.' === null');
+});
+
+it('grows to M3\'s two-line height with a description, and Alt+G reaches its action from anywhere on the page', function () {
+    $page = visit('/material/communication')->waitForEvent('networkidle')
+        ->assertScript("document.readyState === 'complete' && typeof window.Alpine !== 'undefined' && typeof window.Livewire !== 'undefined'");
+
+    $page->script("materialToast('Upload paused', { description: 'The connection dropped at 64%.', action: { label: 'Retry now', handler: () => {} } })");
+
+    $page->assertScript(TOAST."?.textContent.includes('Upload paused')")
+        ->assertScript('Math.round('.TOAST.'.getBoundingClientRect().height) === 68');
+
+    // Focused somewhere else on the page first: the shortcut has to reach the snackbar from
+    // wherever the keyboard already was, since a snackbar never takes the focus on its own.
+    $page->script("document.body.setAttribute('tabindex', '-1'); document.body.focus()")
+        ->keys(':focus', 'Alt+g')
+        ->assertScript('document.activeElement === '.TOAST."?.querySelector('[data-md-toast-action]')");
+});
+
 it('opens a persistent rich tooltip on press', function () {
     $bubble = "document.querySelector('#communication [role=\"dialog\"][popover]')";
 

tests/Feature/Components/ActionStylesheetsTest.php

@@ -26,6 +26,7 @@ dataset('action components', [
     'fab-menu-item',
     'fab-menu',
     'rich-tooltip',
+    'toast',
 ]);
 
 it('draws the component from a stylesheet shaped like every package stylesheet', function (string $name) {

tests/Feature/Components/NavigationBarTest.php

@@ -101,5 +101,5 @@ it('hides on a scroll down and springs back on a scroll up', function () {
 
     expect(file_get_contents(__DIR__.'/../../../resources/js/navigation.js'))
         // Never out from under a snackbar, a bottom sheet or a drawer resting on its edge.
-        ->toContain("document.querySelectorAll('[data-toast], [role=\"dialog\"]')");
+        ->toContain("document.querySelectorAll('[data-md-toast-snackbar], [role=\"dialog\"]')");
 });

tests/Feature/Components/ToastTest.php

@@ -1,48 +1,77 @@
 <?php
 
+use NoNameWeb\LivewireMaterial\Tests\Support\ComponentStylesheet;
+
 it('hosts the snackbar queue, kept across wire:navigate', function () {
     $html = (string) $this->blade('<x-toast />');
 
     expect($html)
         ->toContain('x-persist="material-toast"')
         ->toContain('x-data="materialSnackbar"')
-        ->toContain('bg-inverse-surface')
+        ->toContain('data-md-toast')
-        ->toContain('justify-center');
+        ->toContain('data-md-position="bottom"')
+        ->and(ComponentStylesheet::read('toast')->declarations('[data-md-toast-snackbar]'))->toMatchArray([
+            'background-color' => 'var(--md-sys-color-inverse-surface)',
+            'color' => 'var(--md-sys-color-inverse-on-surface)',
+        ]);
 });
 
 it('draws no state icon, and reaches 48px from its 40px controls', function () {
     $html = (string) $this->blade('<x-toast />');
+    $css = ComponentStylesheet::read('toast');
 
     // M3 tells you to avoid an icon in a snackbar; the type is left to pick the announcement role.
     expect(substr_count($html, '<svg'))->toBe(1)
         ->and($html)->not->toContain('text-inverse-success')
-        ->not->toContain('opacity-80')
+        ->toContain('data-md-toast-action')
-        ->toContain('data-toast-action class="state-layer focus-ring touch-target')
+        ->toContain('data-md-toast-dismiss')
-        ->toContain('state-layer focus-ring touch-target inline-flex size-10');
+        ->and($css->declarations(':is([data-md-toast-action], [data-md-toast-dismiss])'))
+        ->toHaveKey('border-radius', 'var(--md-sys-shape-corner-full)')
+        ->and($css->declarations(':is([data-md-toast-action], [data-md-toast-dismiss])::after'))->toMatchArray([
+            'min-width' => 'var(--md-sys-measurement-space600)',
+            'min-height' => 'var(--md-sys-measurement-space600)',
+        ])
+        ->and($css->declarations('[data-md-toast-dismiss]'))->toMatchArray([
+            'width' => 'var(--md-sys-measurement-space500)',
+            'height' => 'var(--md-sys-measurement-space500)',
+        ]);
 });
 
 it('grows to M3\'s two-line height, and wraps the action below on a compact window', function () {
     $html = (string) $this->blade('<x-toast />');
+    $css = ComponentStylesheet::read('toast');
 
     // SnackbarTokens: 48dp for one line, 68dp for two — a description is that second line.
     expect($html)
-        ->toContain('x-bind:class="current.description ? \'min-h-17\' : \'min-h-12\'"')
+        ->toContain('x-bind:data-md-two-line="current.description ? \'\' : null"')
-        ->toContain('flex-wrap')
+        ->toContain('x-bind:data-md-toast-wrap="current.description && current.action ? \'\' : null"')
-        // M3's "two lines with longer action": the action leaves the text's line below `medium`.
+        ->and($css->declarations('[data-md-toast-snackbar]'))->toHaveKey('min-height', 'var(--md-sys-measurement-space600)')
-        ->toContain('x-bind:class="current.description && current.action ? \'max-medium:basis-full\' : \'\'"')
+        ->and($css->declarations('[data-md-toast-snackbar][data-md-two-line]'))->toBe(['min-height' => '68px'])
-        ->toContain('touch-target ms-auto h-10');
+        ->and($css->declarations('[data-md-toast-content][data-md-toast-wrap]', ['@media (width < 600px)']))->toBe(['flex-basis' => '100%'])
+        ->and($css->declarations('[data-md-toast-action]'))->toHaveKey('height', 'var(--md-sys-measurement-space500)');
 });
 
-it('can sit at the start', function () {
+it('can sit at the start, growing its margin from medium', function () {
-    expect((string) $this->blade('<x-toast position="bottom-start" />'))->toContain('justify-start');
+    $css = ComponentStylesheet::read('toast');
+
+    expect((string) $this->blade('<x-toast position="bottom-start" />'))->toContain('data-md-position="bottom-start"')
+        ->and($css->declarations("[data-md-toast][data-md-position='bottom-start']"))->toBe(['justify-content' => 'flex-start'])
+        ->and($css->declarations("[data-md-toast][data-md-position='bottom-start']", ['@media (width >= 600px)']))->toBe([
+            'inset-inline-start' => 'var(--md-sys-measurement-space300)',
+        ]);
+});
+
+it('falls back to bottom for an unknown position', function () {
+    expect((string) $this->blade('<x-toast position="top" />'))->toContain('data-md-position="bottom"');
 });
 
 it('marks the snackbar and its action for tests and styling', function () {
     $html = (string) $this->blade('<x-toast />');
 
     expect($html)
-        ->toMatch('/<div\s[^>]*\bdata-toast\b/')
+        ->toMatch('/<div\s[^>]*\bdata-md-toast-snackbar\b/')
-        ->toMatch('/<button\s[^>]*\bdata-toast-action\b[^>]*x-on:click="act\(\)"/');
+        ->toMatch('/<button\s[^>]*\bdata-md-toast-action\b[^>]*x-on:click="act\(\)"/')
+        ->toMatch('/<button\s[^>]*\bdata-md-toast-dismiss\b[^>]*x-on:click="dismiss\(\)"/');
 });
 
 it('keeps the live region in the page, polite, around the snackbar that comes and goes', function () {
@@ -54,3 +83,9 @@ it('keeps the live region in the page, polite, around the snackbar that comes an
         ->toContain("x-bind:role=\"current && (current.type === 'error' || current.type === 'warning') ? 'alert' : 'status'\"")
         ->and(substr_count($html, 'aria-live'))->toBe(1);
 });
+
+it('lifts above a bottom bar, publishing its own height for a FAB to clear', function () {
+    expect(ComponentStylesheet::read('toast')->declarations('[data-md-toast]'))->toMatchArray([
+        'bottom' => 'calc(var(--material-bottom-bar, 0px) + var(--md-sys-measurement-space200))',
+    ]);
+});