/* D2 diagrams are inlined as SVG by mdbook-d2, so the mdbook theme variables on cascade into them. d2 tags every colored element with a theme-slot class (fill-N1, stroke-B1, ...) alongside a presentation attribute, and remapping the slots here repaints the diagrams without touching any d2 fence. The leading `svg` is load-bearing. d2 also emits its own `