CSS Development Guidelines Core Principles - Write semantic HTML to improve accessibility and SEO - Use CSS for styling, avoiding inline styles - Ensure responsive design using media queries and flexible layouts - Prioritize external stylesheets over inline or embedded styles Layout Techniques Flexbox - Use Flexbox for one-dimensional layouts (rows or columns) - Leverage and for alignment - Use for responsive wrapping behavior - Prefer property over margins for consistent spacing Grid - Use CSS Grid for two-dimensional layouts - Define grid templates with and - Use for named template areas -…