A solitary elongated rod-shaped bacterial cell. Floating motionless in a tiny, fluid-filled fracture of dense, dark rock completely enveloped by absolute darkness. Composition: close-up, macro close-up, featuring Centered single-focal framing with the microbe as the solitary hero element, emphasizing scale and profound isolation. Scientific details: Rod-shaped bacterial morphology with visible flagella resting idly; rough, crystalline mineral walls of surrounding quartz and pyrite grains enclosing the fluid pocket. Color palette: Deep obsidian black, Charcoal grey, Muted amber bioluminescence. The complete visual composition must sit comfortably inside the canvas with generous clean white/off-white negative space visible on the left, right, top, and bottom. Keep all important objects fully inside the safe frame. Nothing important may touch or cross any edge of the image. Do not crop the primary subject. Do not use edge-to-edge artwork. Do not fill the entire frame with background scenery. hand-drawn 2D explainer cartoon illustration, thick clean black outlines, simplified readable forms, flat cel-style colors, soft minimal shading, clean educational YouTube illustration, clear focal hierarchy, no photorealism, no 3D rendering, no typography, no text, no watermarks
