another section from the build; an interactive 4-step timeline. The showpiece is the shader image transition; one custom fragment shader, no library, using luminance as depth so dark areas fill first and the photo develops into place. Some of the hidden infrastructure pieces; 1) grid-template-rows animation for the expanding steps (no height hacks, no measuring) 2)@motiondev running all interactions 3) Everything sleeps when off-screen - maintaining site speed and reserving GPU for better performance across the rest of the sections