Act as an ecommerce copywriter.
Write a social-proof based abandoned cart email.

Brand: [BRAND]
Product: [CART ITEM]
Social proof: [rating, review snippet, number of buyers, testimonial]
Goal: reduce hesitation + recover sale

Constraints:
- 110–150 words
- Include 1 trust element + 1 CTA
- Avoid discount unless specified

Output:
- Subject + preview
- Email body
- CTA button text