30일 운동 챌린지 릴스 표지

Original prompt

[Input]
- language: Korean
- output_size: 1024x1536

[Purpose]
Instagram Reels cover image for a 30-day fitness challenge, designed as a bold vertical social-media thumbnail with a realistic gym-editorial scene, tracker-driven layout, and clear Korean headline.

[Composition]
- Main subject placement: {모델 자세·표정} occupies the central 45–55% of the frame, with the tracker graphics and Reels-style labels framing the body so the pose reads instantly at small size.
- Background treatment: dark charcoal matte gym setting with visible rubber-floor texture, subtle chalk marks, faint wall panel seams, soft vignette, and realistic fitness-studio depth.
- Spacing and framing: build a strong top header zone for {릴스 카피}, a mid-body hero zone, and a lower utility zone for progress, rep-count, save/share cues, and challenge CTA.
- Add believable Reels cover details: small handle text “@dailyfit_30”, compact date label “2026.05 START”, mini caption “저장하고 같이하기”, and tiny social micro-icons near the lower edge.
- Keep all design elements vertical, punchy, and squarely optimized for Reels cover readability.

[3. CORE STRUCTURE]
1. Header zone (top 18–22%): place {릴스 카피} in large, high-contrast Korean typography, centered or slightly upper-left aligned, with tight stacking if needed for emphasis. Add a small eyebrow label above it: “30일 운동 챌린지” and a compact badge “DAY 01/30”.
2. Hero zone (middle 45–55%): render {모델 자세·표정} as the focal point with realistic activewear fabric texture, natural skin detail, workout tension, grounded contact shadow, and directional rim light against the dark gym background.
3. Challenge system zone: integrate {비주얼·소품} as a visible progress tracker beside or below the subject, with 30 small check boxes, daily labels, workout icons, and several checked lime marks arranged in a crisp vertical grid.
4. Social-thumbnail information layer: include 2–3 short Korean hook blurbs around the tracker, such as “하루 12분”, “장비 없이”, “초보 가능”, plus a small lower CTA strip reading “오늘부터 시작 • 저장 필수”.
5. Concept reinforcement: make the composition clearly communicate {챌린지 종류} and {컨셉·테마} through the tracker, repetition cues, workout props, sweat-detail realism, and fitness-focused visual hierarchy.
6. Accent treatment: use lime-green highlight strokes, check marks, circular day stickers, arrow markers, tiny emoji-like energy symbols, and small timing/repetition details to create a high-energy challenge aesthetic.
7. Final readability pass: ensure the headline, day marker, tracker, handle, and CTA remain legible at mobile thumbnail size, with layering that supports the workout pose.

[4. STYLE RULES]
- Typography: use Pretendard ExtraBold or Noto Sans KR Black for the headline, with condensed tracking and size tuned for thumbnail readability; use Pretendard Medium for tracker labels, handle text, date label, and micro captions.
- Color palette: dark charcoal #1F2227, lime green #B7FF3C, white #F7F7F5, plus muted gray #8C9198 for secondary text; adapt {컬러 톤} while preserving the neon-fitness contrast.
- Border/shadow: apply a soft drop shadow with 0–4px x-offset, 8–12px y-offset, 18% opacity; use thin lime-green outline accents on key challenge elements, small rounded-label containers, progress badges, and CTA strips.
- Realistic props and surface details: include believable gym accessories suggested by {비주얼·소품}, such as a rolled mat, resistance band, dumbbell edge, towel, water bottle, chalk smudges, or shoe-floor contact marks, integrated as supporting details.
- Layout rhythm: combine oversized headline typography, tracker blocks, sticker-like badges, diagonal motion arrows, and lower social UI cues to make the cover feel like a real published Reels thumbnail.

[5. VISUAL STYLE]
- Camera / lens: crisp digital fitness-poster look, equivalent to a 50mm lens at f/2.8 for a balanced subject-to-text composition, with sharp subject clarity and shallow background separation.
- Lighting: studio softbox key light from upper-left at 45°, gentle fill from front-right, and a faint rim light to separate the body from the dark background; add realistic specular highlights on fabric, shoes, skin, and props.
- Color grade: dark graphite base with neon-lime accents and neutral white type, slightly desaturated shadows to preserve a modern gym editorial feel.
- Texture rendering: show rubber floor grain, activewear weave, subtle sweat sheen, paper-sticker label edges, and digital overlay crispness for a believable hybrid of photo and graphic design.

[6. MOOD]
High-energy fitness editorial — the look of a modern K-pop workout challenge thumbnail crossed with a premium training-campaign layout, with motivating Reels-cover urgency and realistic gym atmosphere.

[7. CRITICAL]
- Korean text accuracy: the image must correctly show the exact Korean challenge copy from {릴스 카피}.
- Include readable Korean micro text: “30일 운동 챌린지”, “DAY 01/30”, “하루 12분”, “장비 없이”, “초보 가능”, “오늘부터 시작”, “저장하고 같이하기”, and “2026.05 START”.
- The challenge tracker must visually read as a 30-day system with 30 distinct check slots or daily markers.
- Body proportions must remain anatomically correct, with natural workout pose alignment and no extra limbs or distorted joints.
- {챌린지 종류}, {컨셉·테마}, {모델 자세·표정}, {릴스 카피}, {비주얼·소품}, {컬러 톤}, {비율} must all be represented clearly in the final layout.

[8. 🚫 PROHIBITED]
- Fake official seals / certifications
- Broken Korean characters
- Distorted human anatomy or extra fingers/limbs
- Celebrity composites or unauthorized likeness