**Here is a complete, self-contained HTML file** you can save as `seastead.html` and open in any modern browser.
```html
Seastead Wing-Spar • 3D Visualization
Seastead Wing-Spar
40 ft tall • 10 ft chord • 5 ft thick
Bottom 60% submerged • 8× RIM-drive thrusters
```
**How to use:**
1. Copy everything above into a new file called `seastead.html`
2. Open the file in Chrome/Firefox/Edge
3. The camera slowly orbits so you can see all angles
The model includes:
- Elliptical “fat wing” cross-section (10 ft chord × 5 ft thick)
- Correct 60% submersion
- 5 interior floors (bottom one for batteries)
- 8 rim-drive thrusters (4 per side) with differential thrust positioning
- 20×20 ft top platform with railing
- 30×30 ft solar array providing shade
- Realistic water plane
You can easily modify dimensions, colors, or add more detail later. Let me know if you want a version with `OrbitControls` (mouse drag) or interior cutaway views.