Help me plan responsive behavior for a layout.
THE LAYOUT/PAGE: [[LAYOUT]]
KEY ELEMENTS: [[ELEMENTS]]
Deliver:
1. Sensible breakpoints (content-driven, not just device sizes)
2. How key elements reflow at each (nav, columns, images, tables)
3. What to hide, stack, or reprioritize on small screens
4. Touch vs pointer considerations
5. Fluid vs fixed strategy (and where each fits)
6. The element most likely to break responsively + how to handle it
Design mobile-first where it makes sense.