A high school girl with long black hair and green eyes, wearing a navy blue sports bra and triangular bloomers, running a marathon on a gym treadmill, acquarello style, painterly, anime illustration blending soft oil-like textures with luminous watercolor light, cute, 1girl, highly detailed, clean composition, subtle thick line, no text, no watermark, sharp eyelids, low contrast shading, matte skin, glossy hair, watercolor painting, beautiful ribbon watercolor painting, (masterpiece:1.4), (best quality:1.3), (ultra highres:1.2), (finely detailed), (perfect anatomy), (delicate hands:1.2), (beautiful lighting), BBB style, masterpiece, best quality, best aesthetic.
