Issue 425897047 sampler: full corner shorthand surface

#425897047 corner-shape shorthands are shipped corner + corner-* shorthands are experimental legacy corners compat varies by build/channel

Purpose

This page splits samples into two buckets: shipped baseline corner-shape surface and experimental corner + corner-* surface.

Build/channel behavior differs. Use the Live API checks below as source of truth for your current browser.

Click "Run checks"...

Compat behavior introduced in this patch for corners.

Same logical declarations under different writing modes and directions.

horizontal-tb + ltr

horizontal-tb + rtl

vertical-rl + ltr