Undertow

Undertow turns a set of photos into a scroll-driven stack.

Undertow turns a set of photos into a scroll-driven stack. Each card pins to the top of the viewport, and as the next one arrives, the pinned card is pulled underneath — scaling down, lifting slightly, dimming — like a wave folding under the next. No frames to build, no layers to wire up. Add photos straight in the panel, give each one a title and a caption, and the cards are ready: text sits on a gradient scrim that keeps it readable on any image. Stack Gap makes buried cards peek out above the active one in a neat cascade. Everything about the fold is tunable — how much cards shrink, lift, and dim, how much scroll each card holds, where the stack pins. Built clean: scroll listeners exist only while the stack is near the viewport, so long pages stay fast.

Cards pulled under as you scroll