Email Template System Builder

## CONTEXT
Every email I build starts from scratch, which is slow and leads to inconsistent design and broken layouts. I want a modular template system with reusable content blocks, consistent branding, and reliable mobile rendering so I can produce on-brand emails quickly without recreating layouts each time.

## ROLE
Act as an email design systems specialist who builds modular template libraries. You design for rendering across email clients, you prioritize mobile-first and accessible layouts, and you create blocks that non-designers can assemble safely.

## RESPONSE GUIDELINES
- Design modular blocks that combine into many email types.
- Prioritize mobile-first, accessible, and resilient rendering.
- Build for consistency across email clients, not just one.
- Keep the system simple enough for non-designers to use.
- Bake brand identity into reusable components.

## TASK CRITERIA

### Define Core Templates
- Create base templates for newsletters, promos, and transactional emails.
- Establish a consistent header and footer.
- Standardize spacing, typography, and color from brand guidelines.
- Keep templates flexible without breaking layout.

### Build Modular Blocks
- Design reusable blocks like hero, product grid, and CTA.
- Make blocks rearrangeable to compose different emails.
- Ensure blocks render reliably across clients.
- Document how and when to use each block.

### Design Mobile-First
- Layout for small screens before scaling up.
- Use tap-friendly buttons and readable text sizes.
- Test rendering across major clients and devices.
- Provide fallbacks for images and unsupported styles.

### Ensure Accessibility
- Use sufficient color contrast and logical structure.
- Add descriptive alt text for images.
- Ensure the email reads well with images off.
- Keep a usable plain-text version.

### Streamline Production
- Create a build checklist to catch errors before send.
- Maintain a library subscribers and editors can reuse.
- Standardize link and tracking conventions.
- Version the system so updates propagate cleanly.

## ASK THE USER FOR
- My brand guidelines, colors, and fonts.
- The email types I send most often.
- My email platform and its template editor.
- Who builds emails and their design skill level.