{
  "id": "basic_promo",
  "name": "Basic Promo (single CTA)",
  "description": "Single-column promotional email: logo, hero image, headline, body, one CTA button. Outlook-safe, bulletproof button, 600px responsive.",
  "max_bytes": 102400,
  "template_file": "METADATA/TEMPLATES/email/basic_promo.html",
  "slots": [
    {"name": "preheader",      "type": "text",  "required": true, "maxlen": 120, "hint": "Inbox preview line; complements the subject, not a repeat."},
    {"name": "logo",           "type": "image", "required": true, "hint": "Brand logo asset from the DAM (LOGOS/...)."},
    {"name": "hero",           "type": "image", "required": true, "hint": "Main hero/product image from the DAM (PRODUCTS/...)."},
    {"name": "hero_alt",       "type": "text",  "required": true, "maxlen": 120, "hint": "Alt text describing the hero image (accessibility + image-blocking)."},
    {"name": "headline",       "type": "text",  "required": true, "maxlen": 80,  "hint": "Punchy main headline."},
    {"name": "body",           "type": "text",  "required": true, "maxlen": 400, "hint": "One short on-brand paragraph leading to the CTA."},
    {"name": "cta_text",       "type": "text",  "required": true, "maxlen": 30,  "hint": "Button label, action verb."},
    {"name": "cta_url",        "type": "url",   "required": true, "hint": "Destination URL (https)."},
    {"name": "brand_color",    "type": "color", "required": true, "hint": "Primary brand hex for the button, e.g. #E2231A."},
    {"name": "footer_address", "type": "text",  "required": true, "maxlen": 200, "hint": "Legal sender name + physical address (CAN-SPAM / deliverability)."}
  ],
  "derived": ["brand_name", "unsubscribe_url", "view_in_browser_url"]
}