The shadow color is the palette mantle: near-black on dark themes (a
normal ambient shadow) but a light warm tone on light ones, where the
20px range reads as a wide glow that bleeds into neighbouring windows
and the bar (hardware report, kiln-clay, 2026-07-18). Light mode now
defaults the range to 5px — the glow stays as an identity feature,
just tight; dark themes keep the soft 20px shadow. Still lib.mkDefault,
so downstream overrides keep working.
Verified V1 (generation renders range=5 under kiln-clay); on-hardware
before/after of the live desktop taken in the reporting session.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>