An ultra-detailed scientific hero image of a pour-over coffee bed in a glass dripper, shown as a cutaway cross-section: visible coffee particles, microchannels, and a faint temperature gradient heatmap (cool blues to warm reds) across the slurry. Macro, photoreal style with crisp specular highlights on glass, soft laboratory lighting, and subtle measurement overlays (thermocouple points, flow arrows). Clean white lab background, high contrast, modern editorial look.