An extreme close-up shot of the whiteboard diagram. The node shows '10A' written next to the incoming arrow, and '6A' and '4A' written next to the two outgoing arrows. A man's calloused finger is positioned right on the '10A' label. The background is a clean, slightly reflective white surface with faint ghosting from previous erasures. High contrast black and white palette.
Character appearance reference (MUST match exactly):
- Leo: A mid-30s man with short-cropped dark hair, light stubble, and sharp, intelligent eyes. He has an athletic, sturdy build suited for manual labor. He is wearing a heavy-duty dark navy-blue work shirt with the sleeves rolled up to the elbows, revealing strong forearms. A leather tool belt is strapped to his waist with various pliers and screwdrivers visible. His expression is calm and authoritative. He is standing in a modern industrial workshop with steel beams, copper piping, and warm overhead lighting. The background is slightly out of focus with various electrical components.
