Note: The only reference doc I can find under agents/demandgen/deckee is titled "Rangle" and contains only the heading "# RANGLE MARP DECK" (no body content retrievable). Proceeding with Rangle.io brand defaults: colors — Rangle reddish/coral primary (#FF4F00 / coral), dark charcoal (#1A1A1A), white, accent purple/teal. Clean, modern, lots of whitespace, monospace for code. Tutorial tone, dev audience, ~32 slides.