Breakpoint: one layout change at 768px. Below it, everything stacks in one column, nav links move into ☰, and the request note collapses. Try next: "pick 3a and build it as a real responsive page"
Try next: "add a Bahasa Indonesia version of 2a" · "make 2c show all three devices at once" · "turn this flow into a clickable prototype"
Try next: "go with 1a but add the feature cards from 1b" · "show 1c at desktop width" · "write the Bahasa Indonesia copy"