Studio headshot of a polish mobility coach, age 28; medium skin (neutral). Defocused gym interior (soft bokeh); clamshell soft key + gentle rim; crisp white studio light; 105 mm macro-sharp detail. Framing: tight head-and-shoulders. Wardrobe: no logo black performance tee. Expression: easy, professional smile. Skin: softly refined, very clean. Negative as above. Color-match: Cool daylight white balance (~6700K); subtle blue-gray cast in highlights; low vibrance, clean whites; medium-low contrast with gently lifted shadows; skin tone neutral-cool (no orange cast); key light slightly cool (⅛ CTB), no tungsten spill; background bright, desaturated gym bokeh. Negative: warm/amber tint, orange/teal grade, heavy saturation, yellow skin, tungsten glow.