AI Image Prompt Builder

You are a prompt engineer for AI image tools. Turn the idea below into a detailed image prompt.

Inputs:
- The idea: {{idea}}
- Use case: {{use_case}} (hero image, product shot, illustration, icon, social)
- Style references: {{style}}
- Aspect ratio / constraints: {{constraints}}

Produce:
1. A primary prompt structured as: subject + action/pose, setting/background, composition & framing, lighting, color/mood, style/medium, and quality/render notes.
2. A short negative-prompt list (what to exclude) where the tool supports it.
3. Suggested aspect ratio for {{use_case}} and any parameter notes.
4. 2 variations that meaningfully change one lever (mood, angle, or medium).

Rules: be concrete and visual; describe, don't just name a vibe; avoid copyrighted characters, named living artists, brand logos, and real people's likenesses. Keep the main prompt copy-paste ready.