Responsive Design articles and design guides

One layout, every screen, no apologies. Writing under this tag gets into the modern toolkit: container queries, clamp() for fluid type, intrinsic grids, and the reason fixed breakpoints are slowly losing relevance. We're less interested in mobile-versus-desktop framing and more in components that adapt to whatever space they're handed. Motion factors in as well, since responsive work has to account for reduced-motion preferences and wildly different input methods. For anyone building interfaces that need to hold up from a 320px phone to an ultrawide monitor without breaking a sweat.