Write email subject line variations for the following campaign:

- **Business type:** [your industry]
- **Email purpose:** [promotion / announcement / newsletter / follow-up / event invite / re-engagement]
- **Key offer or hook:** [sale / new product / event / tip / deadline]
- **Audience:** [existing customers / new subscribers / cold leads / VIP list]
- **Brand voice / tone:** [friendly / professional / playful / direct / warm / bold — describe how your brand normally sounds]
- **Any constraints:** [max character count / words to avoid / spam triggers to skip]

**Write 10 subject line options across these styles:**
- **Curiosity** (makes them wonder what's inside)
- **Urgency** (time-sensitive angle)
- **Benefit-led** (states the value directly)
- **Question** (engages by asking something relevant)
- **Personalization** (uses "[First Name]" or feels personal)
- **Numbered list** (e.g., "5 ways to...")
- **Direct and plain** (no tricks, just what it is)

For each subject line, include a one-sentence note on why it works and which audience type it's best for.

Also provide 3 preview text pairings (the snippet that appears after the subject line in the inbox).
Email Subject Line Variations
