A roundup covering CSS stacking contexts, the browser top layer, and how dialogs and popovers interact with it — including a gotcha where a popover becomes inert behind a modal dialog. Also covers CSS @layer cascade layers: how they override specificity, how unlayered styles beat layered ones, and how to integrate cascade layers into existing projects. Additional links cover clip-path animations, border-shape, and 100 ways to center an element in CSS.
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