# Maproom Prompt: North Atlantic Storms Atlas with Shipping Lanes

Build an interactive, single-file `index.html` maproom for the oneshot catalog under the route `/maproom/`.

## Theme
North Atlantic storms atlas with historical shipping lanes.

## Functional Requirements
1. **Map Engine**: Use Leaflet.js via CDN.
2. **Base Layers**: Provide at least one cartographic base layer (e.g., CartoDB Dark Matter or Positron).
3. **Data Layers** (minimum 3):
   - Historical North Atlantic storm/hurricane tracks as color-coded polylines by intensity.
   - Major commercial shipping lanes as styled polylines.
   - Storm genesis/origin points or wind-field radii as markers/polygons.
4. **Filters**: Interactive panel to toggle visibility and filter storms by Saffir-Simpson category and shipping lanes by vessel type.
5. **Legend**: Persistent on-map legend for tracks, lanes, and markers.
6. **Annotation Callouts**: Clicking any track, lane, or marker opens a callout popup with contextual details.
7. **Zoom/Pan**: Full free zoom and pan with a fit-bounds reset button.
8. **Guided Tour**: A "Start Tour" button that sequences through UI elements (filters, legend, specific map features) with spotlight overlays and textual narration.

## Files to Create
- `PROMPT.md` (this reproducible prompt)
- `index.html` (complete, self-contained, no external assets except CDN)
- `artifact.json` (route metadata per provided schema)

## Constraints
- Route directory: `oneshot-sites/kimi-k26-ollama/site/maproom/`
- Do NOT deploy to Cloudflare.
- Do NOT spawn child agents.