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[Subject] One young adult woman in her 20s with a slim build and fair skin, taking a mirror selfie while seated or standing close to an ornate dressing table inside a historic bedroom. She has sleek dark blonde to light brown hair parted in the center and styled into a smooth low bun. Her expression is soft, self-assured, and faintly smiling, with clear skin, subtle polished makeup, and pearl or gemstone earrings. She holds a modern light-colored smartphone in her right hand at chest height, angled toward the mirror. She wears a rich emerald-green medieval or Renaissance-inspired gown with a structured square neckline, fitted bodice, and dramatic flowing sleeves. The gown is heavily decorated with intricate gold embroidery and trim around the neckline, front panel, waist, and sleeve edges.

[Clothing & materials] Luxurious velvet-like green gown with ornate gold threadwork, brocade-style embroidery, and historical silhouette details. The fabric appears heavy and richly textured. Jewelry is minimal but refined, likely pearl-like earrings. No visible modern casual clothing. The only modern intrusion is the smartphone.

[Props/objects] A large wooden mirror frame borders the scene. On the dressing table below are period-style objects: candle holders with lit taper candles, a hand mirror or brush, small ornate boxes, bottles, and grooming tools. In the background there is a lit stone fireplace on the left, medieval-style tapestry wall hangings, dark wood-paneled walls, a four-poster bed with draped canopy curtains, and leaded-glass windows on the right. The smartphone is clearly visible in the subject's hand, creating the time-travel contrast.

[Environment] Historic castle or manor bedroom with dark wood interiors, stone fireplace, warm firelight, candlelight, tapestry wall art, and antique furnishings. The room feels old-world, atmospheric, and immersive, with layered textures and warm amber tones offset by the green gown.

[Composition/Camera] Vertical portrait orientation captured through a mirror. Subject occupies the central lower half, reflected from the waist or chest up. The mirror frame encloses the composition, while the room extends outward behind her. The phone partially covers one side of the torso area but not the face. The composition balances subject, candles, and architectural details, creating a richly layered interior scene.

[Lighting] Mixed warm practical lighting from fireplace and candles plus soft natural window light from the right side. Overall tone is warm and intimate, with gentle highlights on the face, gown embroidery, and polished wood surfaces. Contrast is moderate; the room remains dim but readable. No flash.

[Style/Rendering] Real photo with cinematic heritage-lifestyle styling. The mood is elegant, immersive, and slightly ironic because of the smartphone inside a period setting. Texture fidelity is important: velvet gown, carved wood, tapestry weave, fire glow, candle flame, and aged stone all need to feel convincing. Palette is emerald green, gold, warm amber, dark brown wood, cream candlelight, and muted stone neutrals.

[Detail constraints] Keep exactly one woman in an emerald medieval-style gown taking a mirror selfie in a historic room with a fireplace, candles, tapestry, and canopy bed. Preserve the visible smartphone, gold embroidery, wood-paneled surroundings, and warm period atmosphere. Do not add extra people, electric lamps, modern furniture, or remove the historical room details.

Negative prompt: outdoor garden, plain studio backdrop, multiple women, fantasy armor, crown, exaggerated cosplay makeup, neon lighting, modern bedroom, casual dress, no phone, empty background, bright flash, sci-fi elements, overly dark shadows, cartoon style, modern hotel interior

Suggested parameters: aspect ratio 4:5 portrait; lens 35-50mm equivalent; moderate depth of field; 30-40 steps; CFG 6.5-8; sampler DPM++ 2M Karras or equivalent; style strength low to medium-low; seed suggestion 286471539

Delta prompt strategy:
1. Smartphone disappears -> "modern light-colored smartphone visible in mirror selfie hand"
2. Gown loses richness -> "emerald velvet medieval gown with dense gold embroidery and square neckline"
3. Historical room becomes generic -> "wood-paneled castle bedroom with tapestry, canopy bed, and lit fireplace"
4. Mirror framing is weak -> "scene seen through large wooden-framed mirror"
5. Lighting becomes flat -> "warm firelight and candlelight mixed with soft window light"
6. Hair gets loose -> "sleek center-parted low bun, polished historical styling"
7. Atmosphere loses depth -> "layered antique objects on vanity, candles in foreground, room details behind subject"
8. Mood becomes costume-party -> "elegant heritage realism with subtle modern time-travel contrast"
9. Colors shift too much -> "emerald green, gold embroidery, amber firelight, dark wood palette"
10. Face gets obscured -> "phone held to side enough to keep face fully visible in mirror"