Responsive Design in 2026: Beyond Media Queries Responsive web design has evolved significantly since Ethan Marcotte coined the term in 2010. The core principle — designs that adapt to any viewport size — remains, but the tools have expanded dramatically. Container queries enable component-level responsiveness independent of viewport size. Fluid typography using clamp() eliminates the need for typography-specific breakpoints. The has() CSS selector enables parent-based responsive logic. CSS Grid with auto-fill and auto-fit creates fully responsive layouts without any breakpoints at all. Modern responsive design is less about breakpoints and more about fluid, intrinsic layouts. Mobile-First: The Correct Approach Mobile-first means writing base CSS for the smallest screen size and adding complexity for larger screens with min-width media queries.…