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[Subject] One female-presenting young adult performer with long blonde hair, natural glam makeup, and hoop earrings, captured mid-song while playing acoustic guitar and singing into a microphone. She wears a black fitted top with geometric cutout pattern in white/skin-reveal sections. Expression is focused and emotive, mouth slightly open in vocal delivery.

[Props/objects] Black microphone on stand in foreground-left, acoustic guitar body and fretboard visible at bottom, stage bokeh lights behind subject. Meme-style lower text overlay reads "A GOOD" (white and green) with a thumbs-up emoji below.

[Environment] Performance setting resembling studio stage or intimate live session. Background contains bright circular warm-white lights with radial glow, heavily blurred for depth.

[Composition/Camera] Vertical 9:16 style crop (portrait short-form format). Chest-up framing with guitar occupying lower section. Subject centered slightly right, microphone angled diagonally from lower left.

[Lighting] Warm stage key on face with soft highlights; strong backlight practicals create halo/bokeh effect. Moderate contrast, clean skin tones, concert-thumbnail aesthetic.

[Style/Rendering] Social-video thumbnail style combining live music portrait and bold caption sticker text. High clarity on face, shallow depth of field background.

[Detail constraints] Keep one singer with guitar and mic, bright bokeh stage lights, black patterned top, and lower caption "A GOOD" with thumbs-up icon. Preserve short-form vertical composition and performance mood.

Negative prompt: full concert crowd shot, no instrument, piano instead of guitar, dark silhouette only, flat office lighting, casual selfie, heavy noise, cartoon/anime style, no text overlay, watermark logos, distorted hands/fingers.

Suggested parameters:
- Aspect ratio: 9:16 vertical (or similar portrait reel format)
- Lens/focal length: 50-85mm portrait stage feel
- Depth of field: shallow, strong background bokeh lights
- Steps: 22-32
- CFG / guidance: 5.0-6.3
- Sampler: DPM++ 2M Karras
- Seed suggestion: 118522904

Delta prompt strategy (10 drift risks + corrective micro-prompts):
1) Instrument missing -> "acoustic guitar visible in lower frame"
2) Mic disappears -> "black vocal microphone on stand at left foreground"
3) Lighting turns flat -> "bright circular stage bokeh lights behind subject"
4) Wardrobe changes -> "black fitted top with geometric cutout pattern"
5) Expression wrong -> "mid-song expression, lips parted as singing"
6) Framing too wide -> "tight chest-up vertical short-form composition"
7) Caption missing -> "lower text overlay: A GOOD with thumbs-up emoji"
8) Hair style drift -> "long loose blonde hair side-parted"
9) Scene changes to studio office -> "live performance/stage session backdrop"
10) Style loses thumbnail energy -> "high-contrast social music clip thumbnail look"