CSS Can Now Animate Between Pages

CSS cross-document view transitions allow smooth animations between separate HTML pages using the @view-transition rule with `navigation: auto`. The tutorial covers default crossfade, custom keyframe animations (slide-in/slide-out), animating only specific page sections using named transition groups, and shared element transitions where an image morphs between its position on a list page and a detail page. Key caveats include: transition names must be unique per page, accessibility requires wrapping transitions in a `prefers-reduced-motion: no-preference` media query, and browser support currently covers Chrome, Edge, and Safari but not Firefox. The feature should be treated as progressive enhancement.