Nebula Hero

Build a single-file landing page, `index.html`: plain HTML, one inline `<style>`, inline `<script>`s, no frameworks, no build step. It is a full-screen, non-scrolling hero for a fictional space product called "Orbit". Reproduce every value below exactly. Do not round numbers, add sections or "improve" anything.

## 1. Assets

- **Background video (looping, silent, 1664×1248, 9 s):**
  `https://d2ol7oe51mr4n9.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/4b73c700-3112-4c07-bd48-0af2893dff7c.mp4`
- **Poster / fallback image (same artwork as a still, 1536×1024):** `assets/images/sky.webp`. If you don't have that file, use this PNG copy:
  `https://d2ol7oe51mr4n9.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/0bf7409c-9fa2-4bef-a49d-34903dcc91ad.png`
- **Font:** Inter v4 variable (axes `opsz` 14–32, `wght` 100–900), self-hosted as `assets/fonts/inter-var.woff2`:
  ```css
  @font-face{ font-family:"InterVar"; font-style:normal; font-weight:100 900; font-display:block; src:url(assets/fonts/inter-var.woff2) format("woff2"); }
  ```