What is the difference between adaptive and responsive design?

Adaptive design involves using predefined layouts (breakpoints) for specific screen sizes. Responsive design flexibly adapts to the screen size using relative units, flexible grids, and media queries.

Feature	Adaptive Design	Responsive Design
Approach	Set of fixed layouts	Fluid, flexible
Breakpoints	Fixed, predefined	Flexible, content-dependent
Units	Pixels (px)	Relative (%, em, rem, vw, vh)
Layout	Changes abruptly at breakpoints	Scales smoothly and reflows
Usage	For optimization on specific devices	For smooth scaling on any device