Loading
Building web pages that look good on any screen size — from a phone to a widescreen monitor — like water that fills whatever container you pour it into.
A design approach that uses fluid grids, flexible images, and media queries to adapt layouts to the viewport. Mobile-first means writing base styles for small screens and layering enhancements for larger ones.
Responsive design encompasses viewport-relative units (vw, vh, dvh), media queries (width, prefers-color-scheme, prefers-reduced-motion), container queries (@container), and content-visibility for rendering optimization. Modern implementations combine intrinsic sizing (min(), max(), clamp()) with CSS Grid auto-fit/auto-fill to minimize breakpoint-dependent code.