Style & Environment: Minimal infographic in the "RepresentAI" style on a solid light gray background (#F0F0F0). High-contrast, clean, professional, and skimmable. Ensure there are no yellow or off-white tints in the background.

Typography: Use bold, black, sans-serif headings for all titles and labels. Include a single line of summary text at the very bottom in a smaller, clean font.

Layout & Elements: Four equal-width rounded-corner cards side by side, each with a coloured header and three listed items below. Use thin black lines for borders. The composition must be perfectly centered and symmetrical.

Visual Content: Card 1 header "Structure" with items: Semantic HTML, Single H1 per page, Internal links. Card 2 header "Metadata" with items: Meta title + description, Canonical URL, Open Graph + Twitter Cards. Card 3 header "Machine Readability" with items: noscript fallback, robots.txt, sitemap.xml. Card 4 header "Signals" with items: JSON-LD schema, llms.txt, Alt text + hreflang. Title text: "The Twelve Fixes Every AI-Built App Needs."

Color & Accents: Use the RepresentAI brand purple (#5B4B9E) as the single accent colour for all four card header backgrounds.

Takeaway Line: "Twelve items, four categories, one prompt."

Dimensions: 800x533 for Inline Image
