Scrolling Blur

Soft-masked backdrop blur across the frame. Peak sits at the pinned edge; the curve softens into content so it reads as motion design, not a CSS hack.

Panel: Shape Edge / U / ∩ · Position Top or Bottom · Strength 2–10 (start ~8) · Mode Always On / Follow Scroll / Off · Settle idle delay (Follow Scroll only).

Place fixed over the breakpoint, size to the chrome band. Follow Scroll is Safari-safe. Reduced-motion gets weaker static blur. pointer-events none. No deps.