Give a connected segment M3's 48px target and width

An <x-group> segment is a plain label, 32px or 40px tall, with nothing reaching
past it, and nothing gave a connected <x-button-group> its 48dp minimum width
either — both numbers M3 names and tells you not to reduce. The segment now
carries the shared `touch-target` utility and a 48px floor, and groups.css puts
the floor on the buttons a caller nests in a connected group. <x-button> drops
its hand-rolled ::after for the same utility. Plan step 11, actions.md ACT-05.

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

resources/css/components/groups.css

@@ -47,6 +47,18 @@
     padding-inline-start: calc(var(--group-pad) - var(--group-grow));
 }
 
+/*
+ * A connected segment at the two smallest sizes is 32px or 40px tall, and an icon-only one is as
+ * narrow as it is tall. M3 names both numbers and tells you not to reduce them: "XS and S
+ * connected button groups have a 48dp target area and a 48dp minimum width". The target is the
+ * `touch-target` utility on the segment itself; the width is here, where a group can reach the
+ * `<x-button>`s a caller put inside it.
+ */
+[data-button-group='connected'][data-size='xs'] > *,
+[data-button-group='connected'][data-size='sm'] > * {
+    min-inline-size: 3rem;
+}
+
 /*
  * Connected segments and split halves take their inner corner from `--group-corner`, so pressing
  * or selecting changes one variable and the rounded outer corners stay put.

resources/views/components/button.blade.php

@@ -172,8 +172,8 @@
         $outline => $variant === 'outlined',
         'hover:shadow-elevation-1' => in_array($variant, ['filled', 'tonal'], true),
         'shadow-elevation-1 hover:shadow-elevation-2' => $variant === 'elevated',
-        // Below 48px the touch target reaches past the button, as M3 requires.
+        // Below 48px the touch target reaches past the button, as M3 requires (tokens/state.css).
-        'after:absolute after:top-1/2 after:left-1/2 after:size-full after:min-h-12 after:min-w-12 after:-translate-x-1/2 after:-translate-y-1/2' => in_array($size, ['xs', 'sm'], true),
+        'touch-target' => in_array($size, ['xs', 'sm'], true),
         'disabled:cursor-not-allowed disabled:shadow-none aria-disabled:pointer-events-none aria-disabled:shadow-none',
         'disabled:bg-on-surface/10 disabled:text-on-surface/38 aria-disabled:bg-on-surface/10 aria-disabled:text-on-surface/38' => $contained,
         'disabled:text-on-surface/38 aria-disabled:text-on-surface/38' => ! $contained,

resources/views/components/group.blade.php

@@ -10,7 +10,9 @@
      bind as on any input, the arrow keys move the choice, and a screen reader announces a group.
      The chosen segment rounds fully and takes the selected colour; `variant` is `tonal` (the
      default), `filled` or `outlined`, as for toggle buttons. The segments share the row unless
-     `inline`. An option with `'disabled' => true` greys its own segment.
+     `inline`. An option with `'disabled' => true` greys its own segment. At `xs` and `sm` a
+     segment carries `touch-target` and a 48px minimum width, which M3 asks for by name and tells
+     you never to reduce.
 
      ReStride's props, kept: `label`, `hint`, `hint-class`, `name` (needed with `x-model`, which
      names no property), `options`, `option-value`, `option-label`; plus `option-icon`, `size`,
@@ -43,6 +45,9 @@
     $errorKey = $model ?? (filled($attributes->get('name')) ? str_replace(['[]', '[', ']'], ['', '.', ''], (string) $attributes->get('name')) : null);
     $messages = $errorKey !== null && isset($errors) ? \Illuminate\Support\Arr::flatten($errors->get($errorKey)) : [];
     $size = in_array($size, ['xs', 'sm', 'md', 'lg', 'xl'], true) ? $size : 'sm';
+    // M3: an xs or sm connected segment keeps a 48px target and a 48px minimum width, whatever
+    // its 32px/40px container measures. From md the segment is wider than that on its own.
+    $small = in_array($size, ['xs', 'sm'], true);
 
     $segment = [
         'xs' => 'h-8 gap-2 px-3 type-label-lg',
@@ -75,7 +80,8 @@
             <label @class([
                 'state-layer relative flex cursor-pointer select-none items-center justify-center whitespace-nowrap',
                 'transition-[border-radius,background-color,color] duration-(--md-sys-motion-spatial-fast-duration) ease-spatial-fast',
-                'min-w-0 flex-1' => ! $inline,
+                'flex-1' => ! $inline,
+                $small ? 'touch-target min-w-12' : 'min-w-0',
                 $segment,
                 $colours,
                 'has-focus-visible:outline-3 has-focus-visible:outline-offset-2 has-focus-visible:outline-secondary',

tests/Feature/Components/ButtonGroupTest.php

@@ -46,6 +46,16 @@ it('draws a choice as connected radios', function () {
         ->and(substr_count($html, '<svg'))->toBe(1);
 });
 
+it('keeps a 48px target and a 48px minimum width on the smallest connected segments', function () {
+    $options = [['id' => 'a', 'name' => 'A']];
+
+    expect((string) $this->blade('<x-group size="sm" name="x" :$options />', ['options' => $options]))
+        ->toContain('touch-target min-w-12')
+        ->and((string) $this->blade('<x-group size="md" name="x" :$options />', ['options' => $options]))
+        ->not->toContain('touch-target')
+        ->toContain('min-w-0');
+});
+
 it('draws several choices as checkboxes', function () {
     expect((string) $this->blade('<x-group name="days" multiple variant="outlined" :options="[[\'id\' => \'mon\', \'name\' => \'Mon\']]" />'))
         ->toContain('type="checkbox"')

tests/Feature/Components/ButtonTest.php

@@ -63,8 +63,8 @@ it('rounds by default, squares on request, and squares off further while pressed
 });
 
 it('reaches a 48px touch target below the medium size', function () {
-    expect(buttonClasses('<x-button label="Go" size="sm" />'))->toContain('after:min-h-12')
+    expect(buttonClasses('<x-button label="Go" size="sm" />'))->toContain('touch-target')
-        ->and(buttonClasses('<x-button label="Go" size="md" />'))->not->toContain('after:min-h-12');
+        ->and(buttonClasses('<x-button label="Go" size="md" />'))->not->toContain('touch-target');
 });
 
 it('is an icon button named by its tooltip when it has no label', function () {