Create an illustration of a high school girl with long black hair working out in a sports gym. She is wearing a stylish athletic outfit, consisting of a fitted tank top and shorts, with sneakers. The gym environment includes various equipment such as treadmills, weights, and exercise machines. She is in the middle of a workout, showing determination and focus. The background is lively with other gym-goers and bright, modern decor, capturing the energy and atmosphere of the gym --ar 2:3 --niji 5 --s 270