Draw the sort header without Tailwind

<x-sort-header> renders data-md-sort-header (data-md-active on the
sorted column) with its button and arrow as data-md-* attributes; the
button keeps md-focus-ring and md-touch-target, the arrow takes size 16,
and the hover and hint-arrow states move into components/sort-header.css
(plan step 36). A browser test presses the button at the edge of its
48px target.

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

resources/css/components.css

@@ -30,6 +30,7 @@
 @import './components/slider.css';
 @import './components/search.css';
 @import './components/table.css';
+@import './components/sort-header.css';
 
 /* Containment */
 

resources/css/components/sort-header.css

@@ -0,0 +1,58 @@
+/*
+ * <x-sort-header>: a column header that sorts the table (resources/views/components/sort-header.blade.php),
+ * inside <x-table> (components/table.css), which draws the cell itself.
+ *
+ * The button is the header's own text, in the header cell's type and colour, with a 16px arrow 4px
+ * after it; the corner is extra-small, for the focus ring the button wears (`md-focus-ring`), and
+ * `md-touch-target` gives the one-line button M3's 48px target (foundation/interaction.css). The
+ * sorted column (`data-md-active`) reads in on-surface with its arrow showing the direction; another
+ * column turns on-surface only while hovered, and shows a faint upward arrow while hovered or
+ * focused, at 60% of the ink — a hint of what pressing would do, not a state M3 names, fading on the
+ * fast effects spring.
+ *
+ *   [data-md-sort-header]                 the <th>; data-md-active, aria-sort
+ *     [data-md-sort-header-button]
+ *       [data-md-sort-header-arrow]
+ */
+
+@layer material.reset, material.tokens, material.base, material.layout, material.components, material.text, material.visibility;
+
+@import './icon.css';
+
+@layer material.components {
+    [data-md-sort-header-button] {
+        display: inline-flex;
+        align-items: center;
+        gap: var(--md-sys-measurement-space50);
+        border-radius: var(--md-sys-shape-corner-xs);
+        cursor: pointer;
+    }
+
+    [data-md-sort-header][data-md-active] [data-md-sort-header-button] {
+        color: var(--md-sys-color-on-surface);
+    }
+
+    @media (hover: hover) {
+        [data-md-sort-header-button]:hover {
+            color: var(--md-sys-color-on-surface);
+        }
+    }
+
+    [data-md-sort-header-arrow] {
+        transition: opacity var(--md-sys-motion-effects-fast-duration) var(--md-sys-motion-effects-fast);
+    }
+
+    [data-md-sort-header]:not([data-md-active]) [data-md-sort-header-arrow] {
+        opacity: 0;
+    }
+
+    [data-md-sort-header]:not([data-md-active]) [data-md-sort-header-button]:focus-visible [data-md-sort-header-arrow] {
+        opacity: 0.6;
+    }
+
+    @media (hover: hover) {
+        [data-md-sort-header]:not([data-md-active]) [data-md-sort-header-button]:hover [data-md-sort-header-arrow] {
+            opacity: 0.6;
+        }
+    }
+}

resources/views/components/sort-header.blade.php

@@ -3,10 +3,12 @@
 
      Pressing it sorts by this column, ascending first and then flipping; the arrow says which way,
      and `aria-sort` says it to a screen reader. A column that cannot be sorted is a plain `<th>`.
-     `class` lands on the `<th>` (`text-end` for a number column moves the button with it).
+     `class` lands on the `<th>` (end-aligning a number column moves the button with it).
 
-     The button is only as tall as its title-small line, so it carries `touch-target` and catches
-     presses over M3's 48px minimum; the cell's own padding belongs to the cell, not to it. --}}
+     The button is only as tall as its title-small line, so it carries `md-touch-target` and catches
+     presses over M3's 48px minimum; the cell's own padding belongs to the cell, not to it. The cell
+     renders `data-md-sort-header` (`data-md-active` on the sorted column) and the button
+     `data-md-sort-header-button`, drawn by resources/css/components/sort-header.css. --}}
 
 @props([
     'sortBy' => [],
@@ -20,21 +22,14 @@
     $next = $active && $direction === 'asc' ? 'desc' : 'asc';
 @endphp
 
-<th @if ($active) aria-sort="{{ $direction === 'asc' ? 'ascending' : 'descending' }}" @endif {{ $attributes }}>
+<th data-md-sort-header @if ($active) data-md-active aria-sort="{{ $direction === 'asc' ? 'ascending' : 'descending' }}" @endif {{ $attributes }}>
     <button
         type="button"
         wire:click="$set('{{ $model }}', {{ json_encode(['column' => $column, 'direction' => $next]) }})"
-        data-sort-header
-        @class([
-            'group/sort focus-ring touch-target inline-flex cursor-pointer items-center gap-1 rounded-corner-xs',
-            'text-on-surface' => $active,
-            'hover:text-on-surface' => ! $active,
-        ])
+        data-md-sort-header-button
+        class="md-focus-ring md-touch-target"
     >
         {{ $slot }}
-        <x-livewire-material::icon :name="$direction === 'desc' ? 'arrow_downward' : 'arrow_upward'" optical="20" :class="\Illuminate\Support\Arr::toCssClasses([
-            'size-4 transition-opacity duration-(--md-sys-motion-effects-fast-duration)',
-            'opacity-0 group-hover/sort:opacity-60 group-focus-visible/sort:opacity-60' => ! $active,
-        ])" />
+        <x-livewire-material::icon :name="$direction === 'desc' ? 'arrow_downward' : 'arrow_upward'" size="16" data-md-sort-header-arrow />
     </button>
 </th>

tests/Browser/DataTest.php

@@ -120,3 +120,9 @@ it('draws 52px rows, and 36px ones only in a table that asks to be dense', funct
         ->assertScript("getComputedStyle(document.querySelector('#dense-table tr[aria-selected=\"true\"]')).backgroundColor !== 'rgba(0, 0, 0, 0)'")
         ->assertScript("getComputedStyle(document.querySelector('[data-md-table] thead th')).borderBottomWidth === '1px'");
 });
+
+it('lets the sort button be pressed anywhere in its 48px target', function () {
+    dataProbe()
+        ->assertScript("(() => { const button = document.querySelector('#by-size [data-md-sort-header-button]'); const after = getComputedStyle(button, '::after'); return button.getBoundingClientRect().height < 48 && after.minHeight === '48px' && after.minWidth === '48px'; })()")
+        ->assertScript("(() => { const button = document.querySelector('#by-size [data-md-sort-header-button]'); const box = button.getBoundingClientRect(); const probe = document.elementFromPoint(box.left + box.width / 2, box.top + box.height / 2 - 22); return probe === button; })()");
+});

tests/Feature/Components/DataTest.php

@@ -35,7 +35,7 @@ it('sorts by its column, ascending first and then flipping', function () {
         ->toContain('wire:click="$set(\'sortBy\', {"column":"size","direction":"asc"})"')
         ->and((string) $this->blade('<x-sort-header column="size" model="order" :sort-by="[\'column\' => \'size\', \'direction\' => \'asc\']" class="text-end">Size</x-sort-header>'))
         ->toContain('aria-sort="ascending"')
-        ->toContain('class="text-end"')
+        ->toMatch('/<th data-md-sort-header\\s+data-md-active aria-sort="ascending"\\s+class="text-end">/')
         ->toContain('$set(\'order\', {&quot;column&quot;:&quot;size&quot;,&quot;direction&quot;:&quot;desc&quot;})')
         ->and((string) $this->blade('<x-sort-header column="size" :sort-by="[\'column\' => \'size\', \'direction\' => \'desc\']">Size</x-sort-header>'))
         ->toContain('aria-sort="descending"')
@@ -46,7 +46,9 @@ it('gives the sort button and every page control a 48px target', function () {
     $pages = new LengthAwarePaginator(range(1, 10), 95, 10, 3, ['path' => '/shares']);
 
     expect((string) $this->blade('<x-sort-header column="size" :sort-by="[]">Size</x-sort-header>'))
-        ->toContain('touch-target')
+        ->toMatch('/<button(?=[^>]*data-md-sort-header-button)(?=[^>]*class="md-focus-ring md-touch-target")[^>]*>/')
+        ->toContain('--md-icon-size: 16px')
+        ->not->toContain('data-md-active')
         ->and((string) $pages->links())
         ->toContain('state-layer focus-ring touch-target');
 });
@@ -91,3 +93,10 @@ it('draws Livewire\'s paginators in M3, wired to its page actions', function ()
         ->toContain('wire:click="nextPage(\'page\')"')
         ->not->toContain('text-gray');
 });
+
+it('draws the sort header from its stylesheet, its arrow hidden until the column sorts or is hovered', function () {
+    expect((string) file_get_contents(__DIR__.'/../../../resources/css/components/sort-header.css'))
+        ->toContain('@layer material.components')
+        ->toMatch('/\\[data-md-sort-header\\]:not\\(\\[data-md-active\\]\\) \\[data-md-sort-header-arrow\\] \\{\\s*opacity: 0;/')
+        ->and((string) file_get_contents(__DIR__.'/../../../resources/css/components.css'))->toContain("@import './components/sort-header.css';");
+});