Skybridge 404

Create a single-page, full-viewport 404 error screen in React + Vite + Tailwind CSS v4. Match this composition precisely.

PAGE / CANVAS
- The page must occupy the full viewport: `min-height: 100svh`.
- Use a black fallback background.
- Do not add page scrolling horizontally. Allow vertical scrolling only if a very short viewport requires it.
- The page should be responsive while preserving the desktop composition at larger sizes.
- Use no cards, buttons, nav links, gradients outside the 404 numerals, texture, glass, dark overlay, blur overlay, or any additional UI.

BACKGROUND VIDEO
- Add this exact MP4 as the full-page background:
  `https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260801_001207_ec20d138-aa45-4b2b-ab8c-bdc71607f240.mp4`