hand-drawn 2D explainer cartoon illustration, thick clean black outlines, simplified readable forms, flat cel-style colors, soft minimal shading, expressive human characters, clean educational YouTube illustration, simple depth, clear focal hierarchy, no photorealism, no 3D rendering. Centered hero composition on a clean white background. Single 2D cartoon miner in blue-gray uniform wiping sweat from his expressive face with a towel, standing next to a dark rock wall segment with heat waves, occupying the central 50% of the frame. Generous white negative space on both sides. Simple digital heat gauge showing 140°F, bright cartoon colors, soft minimal shadows, no photorealism, no 3D, no text.
