Bring back the reference's hero ambient — text left, looping WebM right — but
fixed: self-hosted (62KB, off Manus's S3), poster-first with a paper-tinted
container so it's NEVER blank, and loaded via JS only when appropriate (skipped
on Save-Data and prefers-reduced-motion; poster stays if autoplay is blocked).
No autoplay attribute = no surprise download. Poster image added next.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
