HTML Development Guidelines Core Principles - Write semantic HTML to improve accessibility and SEO - Use appropriate elements for their intended purpose - Ensure proper document structure and hierarchy - Prioritize accessibility by using ARIA roles and attributes when needed Semantic Elements Document Structure - Use for introductory content and navigation - Use for the primary content (one per page) - Use for footer content - Use for navigation sections - Use for tangentially related content Content Sections - Use for self-contained, distributable content - Use for thematic grouping of conte…