Casual Mirror Selfie of a Young Woman in an Elevator

A [young woman] in her early 20s taking a casual mirror selfie in an [elevator]. She has [black] short straight bob hair with thin bangs, natural and slightly disheveled. Her expression is relaxed and candid, with aloof, calm eyes looking at her phone screen. She wears Korean casual street style makeup with a pale matte base and subtle pink lip tint. She is slim but curvy, with a narrow exposed waist and full chest. She wears a [pale yellow/cream] short-sleeve cropped t-shirt with a deep U-neck, ribbed texture, and tight fit, which is slightly sheer, faintly revealing a dark undergarment. She also wears [dark wash indigo] baggy low-rise jeans with prominent contrast white stitching. Accessories include a delicate thin gold/silver necklace, white wired earphones, and a black shoulder bag strap. The pose is a casual mirror selfie stance, standing centered, holding a black smartphone in her right hand. The background is a metallic silver ribbed stainless steel elevator interior with button panels and handrails. Lighting is cool, flat overhead fluorescent light, creating soft specular highlights. The image has a slight digital noise, unpolished everyday mobile capture feel, 3:4 vertical aspect ratio, and deep depth of field. Vibe: chill, bored but stylish, Y2K casual, Gen Z OOTD, high authenticity. Must keep wired earphones, sheer top effect showing dark bra, exposed midriff, elevator background. Negative prompt: professional lighting, studio setup, bokeh, blurry background, heavy makeup, perfectly styled hair, CGI, overexposed.