Friendly Gym Portrait

Studio headshot of a man endurance coach, age 38; fair 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: non-branded black fitted athletic tee. Expression: kind, confident smile. Skin: evenly refined, natural texture. 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.