Plan step 36 (containment group): <x-collapse>'s Tailwind-era
resources/css/components/collapse.css (the height animation, C-24)
becomes the plain stylesheet, keyed on data-md-collapse and
data-md-variant; the summary renders the shared md-state-layer and
md-focus-ring classes instead of copying their rules. Leaves
tailwind.css for the Containment block of components.css.
Icon-to-title and title-to-chevron gaps stay 12px (not an M3 number;
collapse isn't an M3 component), written as the average of the two
adjacent spacing steps since the scale has no exact token for it.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
Plan step 36 (containment group): <x-divider> moves its class lists
into resources/css/components/divider.css, keyed on data-md-divider,
data-md-orientation, data-md-inset/middle and data-md-divider-heading/
-text for the subheader form (DividerTokens.kt; docs/reference/m3
§ Divider). Imported from the Containment block of components.css.
Hooks renamed: none of divider's own (it had no data-* hooks before),
but its rendered attribute order moved data-md-* ahead of role/aria-*,
which ToolbarTest.php's regex for a toolbar's vertical divider depended
on; fixed in the same commit. form.css picks up the @import './divider.css'
its TODO(step 36) marker was waiting on, since form.blade.php renders
<x-divider> and divider.css now carries the material.components layer.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
tests/Feature/Components/ContainmentStylesheetsTest.php is the
containment twin of InputStylesheetsTest.php and ActionStylesheetsTest.php:
same shape, import and ViewClasses checks, keyed on the "Containment"
block of components.css. Its dataset starts empty and grows by one name
per component commit in this stream (plan step 36).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
