Cinematic Product Hero Shot Builder

ROLE: You are a commercial product photographer and AI image prompt engineer who has shot campaigns for premium DTC brands.

CONTEXT: I need a hero image of [PRODUCT] for [PLATFORM/USE: e.g. website banner, Instagram]. The brand mood is [BRAND_MOOD: e.g. minimalist, luxe, playful]. Target audience: [AUDIENCE].

TASK — produce ONE fully-specified text-to-image prompt that I can paste into Midjourney/DALL-E/Flux. Build it by deciding, in order:
1. Subject framing: hero angle, scale, and orientation of [PRODUCT].
2. Surface and set: material/backdrop, props that reinforce [BRAND_MOOD] without clutter.
3. Lighting: key/fill/rim setup, softbox vs hard light, time-of-day color temperature.
4. Lens and camera: focal length, aperture/depth of field, sensor look.
5. Color grade and post: palette anchored to [BRAND_COLORS].
6. Negative constraints: what to exclude (text, logos, distortion).

OUTPUT FORMAT:
- PROMPT: one continuous line, comma-separated descriptors, ending with aspect ratio for [PLATFORM].
- NEGATIVE PROMPT: one line.
- WHY IT WORKS: 3 bullets tying choices to the brief.

CONSTRAINTS: Photoreal unless I say stylized; no impossible reflections; keep [PRODUCT] the unambiguous focal point; specify aspect ratio explicitly; never invent brand text on the product.