Anime Girl Under Summer Sky

Create a clean high-resolution anime illustration of a teenage girl standing outdoors under a vivid summer sky, viewed from a low angle behind her as she turns her head over her shoulder to look at the viewer. She has {argument name="hair color" default="dark brown"} hair in a high side ponytail tied with a {argument name="hair ribbon color" default="navy blue"} ribbon, long loose bangs, large soft purple-brown eyes, a small neutral mouth, and lightly blushing cheeks. She wears an oversized plain {argument name="shirt color" default="white"} short-sleeve T-shirt that drapes loosely over her body and reaches past the hips, with subtle folds and shaded fabric, plus short dark athletic shorts visible underneath. Her posture is casual and slightly shy, one hand tucked near the shirt hem or pocket area, shoulders turned away while her face looks back. Use a bright blue sky background with scattered fluffy white cumulus clouds, strong daylight, crisp cel-shaded anime rendering, soft gradients, delicate line art, and a wholesome slice-of-life mood. Composition: square 1:1 canvas, character centered and occupying most of the frame, low camera angle emphasizing sky, no text, no watermark, no extra characters.