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 explorer in red hazmat suit wiping heat sweat condensation off his helmet visor, standing in soft pink geothermal steam haze, occupying central 50% of frame. Generous white negative space on both sides, expressive human face inside helmet, flat cel colors, soft minimal shadows, no photorealism, no 3D, no text.
