Stop the Specificity Arms Race: Why You Need Cascade Layers Picture this: you are working on a massive project, and you need to change the color of a primary button. You write a clean class, but it does not work. You check the DevTools and see that some legacy “global.css” or a third-party library is using a selector like #sidebar .nav-item .active > a . To beat it, you either write an even longer selector or throw in the “nuclear option” — !important . We have all been there, and frankly, it is exhausting. Specificity has always been the “final boss” of CSS. It is the reason why CSS architectures like BEM were invented — to keep everything flat and predictable. But in 2026, we do not have to fight the cascade anymore. We can control it. Enter Cascade Layers (@layer) . How We Suffered Before: The Era of Specificity Hacks Before @layer became a standard, we managed specificity through sheer discipline or ugly workarounds.…