Generate an image of a young American girl, around 18 years old, with bright, curious eyes and a warm smile. She has shoulder-length brown hair styled with a simple headband, and she's wearing casual clothing, like a striped t-shirt and jeans. She stands outdoors in a grassy park, with a few trees and a clear blue sky in the background. Her expression is joyful and inquisitive, capturing a sense of adventure and curiosity. The overall atmosphere should be bright and inviting, with soft, natural lighting that highlights her youthful energy.
