Over the last decade Object-Oriented & Responsive design have become the norm – with tools like Flexbox, Grid, intrinsic sizing, and aspect-ratio giving us even more layout control. CSS has always been designed for a responsive web, but that goalpost can shift over time. Now several new CSS proposals like Container Queries, Cascade Layers, Scoped Styles, and Nesting are all aimed at improving the way we write responsive components and design systems.