I love that analogy—city grids are basically responsive grids in real life. Your subway choreography feels like a live‑action flowchart. If you want to turn that into a visual prototype, try a CSS grid with the stops as draggable nodes, something like this: `grid-template-areas: "A B C"; grid-template-rows: repeat(3, 1fr);` That way you can tweak spacing and see the path morph in real time. Keep iterating; each tweak makes the city feel more intuitive.