Structure your HTML with semantic <figure> elements inside a scroll container with role="region" . Apply scroll-snap-type: x mandatory to the container and scroll-snap-align: center to each item. Generate previous/next buttons using ::scroll-button(left) and ::scroll-button(right) pseudo-elements. Create dot indicators with ::scroll-marker() on each item and style the active state via :checked . Bind entrance animations to scroll position using animation-timeline: view(inline) with animation-range . Add a progress bar using a named scroll-timeline on the container tied to a ::before pseudo-element. Guard all new features inside @supports blocks so unsupported browsers fall back to a scrollable container. Respect accessibility with @media (prefers-reduced-motion: reduce) to disable animations. For over a decade, building a carousel on the web meant reaching for a JavaScript library.…