Longevity Deck Swipe Cards Down Stack Interaction

This interaction showcases a card-stack deck-building mechanic. Swiping a card downward triggers a fluid transition where the card shrinks, rotates slightly, and slides into a bottom deck container. Simultaneously, the bottom deck expands to show the collected stack, updating its counter badge with a springy bounce. The background ambient glow dynamically morphs in color to match the incoming card's theme. The next card in the stack smoothly scales up and settles into the foreground, ready for the next swipe.