Email Subject Line 50 Characters

Write email subject lines for {{email_campaign}}.

CONSTRAINTS:
- Maximum 50 characters (mobile optimal)
- Create 10 variations
- Mix of personalization, urgency, curiosity, benefit approaches
- Avoid spam trigger words
- No ALL CAPS
- Limited emoji use (max 1, relevant)
- No misleading content

Email purpose: {{purpose}}
Target segment: {{segment}}
Key offer/message: {{message}}
Send time: {{send_time}}

Provide:
1. 10 subject lines with character counts
2. Preview text pairings (under 90 chars)
3. A/B test recommendations
4. Spam score considerations