Same regression the S3 edge-fade caused for the Plex player, and the one my
"swept the class" pass missed: PlayerModal is `fixed inset-0 z-50` but rendered
inside the page scroller, so once that scroller got the mask it became a
stacking context and scoped the modal's z-50 inside it — the nav rail (z-40) and
header (z-30) painted over the player, and the fade dimmed its top edge (worst
at browser zoom, where the centered card is smaller against the rail/panel).
Portaled to <body>, where every other full-screen overlay already lives.
Verified: modal is body-parented, full-viewport, and hit-tests on top at the
nav / filter / header / corner points with the main mask active.
peter
65ab33d632