Act as a presentation designer. Create a visual style guide for a {{number_of_slides}}-slide deck presenting {{presentation_topic}} to {{audience}}, built in {{slide_software}}. Define: the overall visual idea in one sentence; a type system with two fonts that are free or built in, with sizes for titles, body text, and captions; a color palette with roles for background, text, accent, and data highlight; six reusable layouts, such as title, section divider, big number, comparison, chart, and image with caption; rules for charts, icons, and photos; and a maximum amount of text per slide. Keep everything readable from the back of a room and on a shared screen, with accessible contrast. Finish with a before-and-after example of turning a text-heavy slide into a visual one.