Replaced neutral-gray scrollbar with muted-steel-blue rgba(107,125,153,...) — the page's --muted colour at varying opacities. Thumb blends with the navy-blue background palette (#0b1120 / #151d2e / #1e2d45) rather than standing out as an unrelated grey element. Page-level + iframe-injected scrollbar: unified palette. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>