Cinematic Mirror Selfie Portrait with Locked Face Identity

Face identity locked exactly as the reference image, do not change facial structure, eyes, eyebrows, nose, lips, skin tone, face shape, or natural expression. Cinematic ultra-realistic 8K portrait of a young woman taking a mirror selfie indoors. She wears a cute pink top with multiple red heart patterns and light yellow denim jeans. Her hair is tied in a messy bun with a few soft strands framing her face. Soft natural lighting, clean minimal background, warm skin tones, subtle makeup, gentle smile, crisp mirror reflection, high-detail fabric texture, photorealistic atmosphere. Add "SyntheSarah" as a small watermark at the bottom-left corner, Petit Formal Script font, thin elegant cursive strokes, soft white color rgba(FFFFFF), 1px letter-spacing, subtle premium handwritten signature style, slight transparency, minimal and refined, no background on text, blends naturally into the image.