Responsive Paradigms Mobile, tablet, and desktop are fundamentally different interaction contexts. The input method, screen real estate, viewing distance, and session intent all differ. Responsive design is not the same layout at different widths — it is a different design decision at each breakpoint. The Three Paradigms Mobile (< 768px) - Input: Touch — fingers, not a cursor. Tap targets ≥ 44×44px. - Navigation: Bottom tab bar (thumb reachable) or hamburger drawer. Top navigation is hard to reach. - Session: Often interrupted, task-focused, shorter. Show the most important thing first. - Con…