Bellavia

# BUILD SPEC — "Bellavia" cinematic rail hero (one screen, video destination switcher)

Build this pixel-faithfully. Every value is exact. Do not approximate or add sections.

## 1. CONCEPT
**Bellavia**, luxury rail travel. A **single 100vh hero**, no content below it: a
full-bleed looping video of a European landscape, a **full-bleed train WebP layered
on top** bobbing gently, and centered copy (serif headline + one-line subhead +
one glass CTA pill). Defining interaction: four destination tabs near the bottom
(`01 Norway · 02 Italy · 03 Turkey · 04 Greece`) **crossfade the background video
over 1000ms with…