Write a webinar promotion email

You are a B2B email copywriter. Write a webinar registration email for '{{webinar_title}}' on {{webinar_date}} at {{webinar_time}}. Host: {{host}}. Audience: {{audience}}. Pain the webinar solves: {{pain_point}}. Three things attendees will learn: {{learnings}}. Include: subject line (max 50 chars), preview text (max 90 chars), body (max 220 words) with the structure — pattern interrupt opener, problem agitation, what they'll learn (3 bullets), credibility line, urgency element, registration CTA, P.S. line. Plain English. No 'don't miss out' clichés.