Vocari Hero — Référence de design web et prompt

# Prompt: Vocari AI assistant hero

Build a single-file, one-screen **landing hero for a fictional voice-AI platform, Vocari**. Use plain HTML, CSS and vanilla JS, with no framework and no build step. The look is a deep navy night sky that glows into bright cyan at the horizon. A pixel-dot audio equaliser rises from that glow, and in front of it sits a dark side-profile silhouette of a man with curly hair, with two small floating UI cards.

## Media

- **Background gradient:** `https://d2ol7oe51mr4n9.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/35281788-af1d-4637-b2bf-24ebe55f11bb.png` (745×194). Navy #09131F at the top, through teal, to cyan #46DCEC and then white at the bottom.
  - The page uses it as a 3-slice: the top rows are anchored at the top, the middle row stretches, and the bottom rows are anchored at the bottom with a 40px feathered join.
- **Silhouette:** `https://d2ol7oe51mr4n9.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/b5703dce-12a2-4177-8b07-8c158121d986.png`, a transparent PNG of a young man with thick curly hair and a beard in right-facing side profile. It's one flat navy-black shape (#0A0F15).
  - It's centred slightly right of the middle, rising from the bottom edge, with its head overlapping the equaliser.
- **Equaliser:** an inline SVG of about 2,000 small square dots in columns of different heights, spanning the full width. The dots are cyan to pale cyan and fade into the white glow.