Build a single-page widget that helps campers figure out how many firewood logs they need for a campfire outing.

The user inputs:
- **Number of people** gathered around the fire
- **Duration of the campfire** in hours (1–12)
- **Fire intensity** (low / medium / high, selectable via buttons or a toggle)

The app instantly calculates and displays:
- **Estimated log count** needed
- A **wood bundle count** (assuming a standard bundle = 5 logs) so the user knows how many bundles to buy at the camp store
- A short friendly tip (e.g., "Bring one extra bundle just in case!" when duration > 4 hours)

Use a warm, outdoorsy visual style — earthy browns, oranges, and a small flame or log icon. All calculations happen client-side with no backend. The result should update live as the user changes any input.