Cards on the pale Light / Marble backgrounds now lift off the surface with a
subtle drop shadow. Drawn in DrawGlassPanel (behind the card fill) as fading
rounded-rect STROKES offset down — strokes never paint across the card body, so
only the outer soft blur remains once the fill covers the interior (the
"render then mask out the UI area" result, no FBO needed). Gated to the Light and
Marble themes (cached per theme-generation); dark themes are unchanged. Verified
across marble / light (shadow present, smooth, body clean) and dark (none).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>