Generate static ad creative variations for testing

**6 static ad variants — Brindle stainless insulated water bottle | 1:1, top-right third reserved for headline**

Locked across all 6: the matte-black bottle, palette (#1A1A1A charcoal, #E8E2D5 sand, #C7472E rust accent), bottle positioned center-left, top-right third clear.

1. **Background swap:** Bottle on a sun-warmed hiking rock, sand-toned dust haze behind.
2. **Lighting swap:** Same studio setup, hard directional morning light raking left-to-right, long dramatic shadow.
3. **Model swap:** A runner's hand mid-grab reaching for the bottle on a gym bench, motion blur on the arm only.
4. **Prop swap:** Bottle beside a folded trail map and worn leather gloves on weathered wood.
5. **Angle swap:** Low hero angle looking up at the bottle against open sky, making it monumental.
6. **Mood swap:** Cold blue-hour campsite scene, bottle catching the last rim of warm light, rust accent glowing.

*Each holds product, palette, and headline zone constant — only the named lever changes, so the winning variant tells you exactly which lever moved the needle.*