Introduce and compare modern CSS solutions including BEM, CSS modules, CSS-in-JS with styled-components, and Atomic CSS. Learn the trade-offs, benefits, and when to use each approach.
CSS fixed position is not always relative to viewport. It becomes relative to the closest ancestor with transform, perspective, filter, will-change, contain, or backdrop-filter properties set.
Learn about physical pixels, CSS pixels, device pixel ratio, and why understanding them matters for responsive design and accessibility. A comprehensive guide to building better web experiences.