2. Write the prompt like a spec. Real sizes, real colors, real timings. Mine says things like: the slide takes 480ms, easing cubic-bezier(0.2, 0.8, 0.2, 1), no bounce. Then I attach the Figma export of that exact state and write "match this pixel for pixel". That's how the calendar on the last slide got its hover: the cell lifts, a preview card shows cover, time, place and spots left, and Book sits right there.