Write a Webinar Invitation Email That Fills Seats

Act as a webinar promotion and email copywriting specialist. I am hosting a webinar on [WEBINAR_TOPIC] on [WEBINAR_DATE] for [TARGET_AUDIENCE]. I want to fill [TARGET_REGISTRATIONS] seats. Write a webinar invitation email sequence covering: Invitation Email 1 — sent 10 days before (benefit-led, under 250 words), Invitation Email 2 — sent 5 days before (social proof and urgency), Reminder Email — sent 24 hours before (FOMO and logistics), Day-of Reminder — sent 1 hour before (last-chance tone). Subject lines for all. Also write the registration page headline and 3-bullet promise statement.