Coming Soon Page

/write
Create a coming soon / launch page.

Product/Project Name: {{projectName}}
Launch Date: {{launchDate}}
Tagline: {{tagline}}
Collect Emails: {{collectEmails}}

The page should include:
- Hero with product name
- Countdown timer
- Brief teaser description
- Email signup form
- Social media links
- Background visual

Design principles:
- Build anticipation
- Clear launch date
- Easy email capture
- Social sharing ready
- Mobile responsive
- Engaging animation

Use vanilla JavaScript for countdown. Return complete HTML page.
Return complete, runnable output with clean structure and sensible defaults.
Prioritize readability, accessibility, and maintainability.
!Be concrete and specific; avoid vague language.
!Return only the final output.
>html