first-person perspective, gamer character, (20yo), intense focus expression, short brown hair, casual gaming headset, graphic t-shirt, jeans, sitting on gaming chair, keyboard and mouse in action, computer monitors, dynamic room lighting, indoor gaming setup, posters on wall, FPS game on screen, Counter-Strike: Global Offensive, changing field of view (FOV) in-game settings, ambient room light, detailed gaming rig, high contrast, sharp textures, vibrant colors, wide-angle lens effect.