Agent Grove

Build a single full-screen (`h-screen w-full overflow-hidden`) hero page for **nexum** — a dark cinematic AI-ops landing hero with a full-bleed background video, glassmorphism nav/cards, and bottom-anchored content. Stack: React + Tailwind + `lucide-react` (`ChevronDown`, `Menu`, `X`). No routing. One section only.

### Fonts (exact)
Load from Google Fonts:
```
https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600;700&family=Silkscreen:wght@400;700&display=swap
```
- Global body: `'Geist', -apple-system, BlinkMacSystemFont, sans-serif` with antialiased smoothing
- Stats number `"42,500+"` only: `fontFamily: "'Silkscreen', cursive"`, weight normal, tracking-tight
- Everything else is Geist

### Background video (exact URL + behavior)