Vertex

Build a single, self-contained, production-ready `index.html` — one file, no build
step, no frameworks, no local assets. It renders a full-viewport dark hero section
for a fictional e-commerce SaaS called "Vertex Shops". Every image loads from the
absolute CloudFront URLs in §8. There is NO video anywhere in this page.

Two components below are marked PIXEL CONTRACT. Those are the most commonly
botched parts of this design. Implement them exactly as written, including the
DO-NOT lists. Do not "improve" them, do not substitute a more conventional
button/pill pattern, do not add glows or centring that is not specified.

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0. GLOBAL SHELL