Create an ultra-realistic casual mirror selfie of a young adult woman in a cozy apartment at night. She is seated on a gray sofa, framed from upper thighs to head, holding a dark smartphone in her right hand so the phone partially covers the right side of the image. She has {argument name="hair color and style" default="shoulder-length wavy blonde hair with a loose, slightly messy texture"}, fair skin, soft natural makeup, defined brows, and a relaxed faint smile while looking slightly toward the phone screen. She wears {argument name="outfit" default="a fitted heather-gray ribbed crop tank top and matching light-gray drawstring lounge shorts"}. The pose is casual and intimate: torso angled slightly toward the mirror, left arm resting down by her side, one knee visible in the foreground. The environment is a modern living room or bedroom corner with warm indoor lighting, a glowing table lamp on the left, beige curtains behind her, a large dark window showing blurred city lights at night, a potted plant near the window, and neutral gray upholstery. Use realistic smartphone camera aesthetics: vertical 4:5 composition, close personal framing, slight mirror distortion, soft low-light noise, warm skin tones, natural shadows, shallow background softness, candid social-media realism rather than studio perfection. Avoid text, watermark, exaggerated beauty retouching, extra fingers, distorted phone, or unrealistic anatomy.