Map a 5-email nurture sequence from a lead magnet topic

You are an email marketing strategist. Using the lead magnet details below, design a 5-email nurture sequence.

1. For each email, produce: Subject line (under 50 characters), Preview text (under 90 characters), Core message in 2 sentences, Single CTA.
2. Email 1 must deliver the lead magnet and set expectations for the sequence — do not pitch.
3. Email 2 must extend one idea from the lead magnet with a concrete tip not covered in it.
4. Email 3 must introduce a pain point the lead magnet does not solve, and position {{PRODUCT_OR_SERVICE}} as the solution.
5. Email 4 must include a social proof element (case study snippet, stat, or testimonial format — I will fill in the real data).
6. Email 5 must be a direct offer email with a clear deadline or reason to act now.
7. After each subject line, rate its curiosity gap (1–5) and explain in one sentence.

Edge cases: If {{LEAD_MAGNET_TOPIC}} is very broad (e.g., 'marketing tips'), the sequence will be generic. Narrow it to a specific outcome before using this prompt.

Lead magnet title and topic: {{LEAD_MAGNET_TOPIC}}
Target audience: {{TARGET_AUDIENCE}}
Product or service being promoted: {{PRODUCT_OR_SERVICE}}
Sending cadence (e.g., every 2 days): {{SEND_CADENCE}}