Responsive Design 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 accessibility by using ARIA roles and attributes - Design mobile-first, then enhance for larger screens Mobile-First Approach Strategy - Start with styles for the smallest viewport - Add complexity through progressive enhancement - Base styles work without media queries - Media queries add features for larger screens Benefits - Forces prioritization of essential content…