Clean Flat Vector Avatar

Create a clean, front-facing vector avatar of a young man in a contemporary flat illustration style. The portrait is perfectly centered and cropped from the upper chest upward, with the subject filling most of the square frame. Use bold geometric forms, smooth color transitions, crisp edges, and a balanced, symmetrical composition. Facial features should be simplified yet expressive, with clear eyes, subtle shadows, and natural skin tones. He has hair_style, a facial_hair, and wears round black eyeglasses with a plain black crew-neck T-shirt. Place him against a background with no patterns or objects. Maintain a polished digital avatar aesthetic inspired by modern vector artwork, featuring vibrant colors, sharp lines, minimal detail, and absolutely no photorealistic textures. High-resolution, 1:1 aspect ratio, suitable for a professional profile image.