プロンプト
A vertical column of moon phases descending the cover in pale indigo and white, quiet astronomical rhythm. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be Japanese only; render the quoted title and author name in correct, complete Japanese characters. Book cover with title "月の満ち欠け" and author name "望月暁" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build one compelling genre-appropriate key image on a single strong subject in a single scene — never a collage of competing motifs. Follow the 2026 trade-cover direction: oversized structural title typography treated as part of the artwork and placed where the chosen style directs — top, side, vertical, or integrated into the artwork, not always a top banner; a high-contrast palette; an author name placed deliberately and secondary to the title; short correctly rendered title text in the requested language enclosed in quotation marks; and a silhouette that stays readable at 100-pixel thumbnail size in a two-second scroll, all with trim-safe breathing room.
Style-specific direction:
Style: art-house minimalist editorial book cover blending Japanese wabi-sabi restraint with Swiss-grid graphic precision; a flat poster-like symbolic design rather than a scene illustration.
Subject: preserve the requested concept, reduced to one strong graphic motif — concentric ripples, an ensō brush circle, contour lines, a single botanical or celestial form — rendered with clean geometric precision.
Composition: portrait front-cover layout with asymmetric balance; the motif anchors the grid while typography lives beside or through it as a compositional element, never a centered top banner.
Lighting or Color: flat even illumination; a minimal palette of deep indigo, white, and charcoal with one restrained accent, on a textured washi-like paper grain.
Typography: render the exact quoted title once as confident display lettering placed vertically or asymmetrically and the exact quoted author once in small quiet type; keep both crisp and correctly spelled.
Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, photographic scene, spine, pages, back cover, perspective, mockup, badge, logo, watermark, or duplicated text.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page edges, back cover, perspective view, angled cover, tabletop, pedestal, hands holding a book, room scene, drop shadow around the cover, misspelled title, crowded typography, weak focal point, busy collage of competing motifs, washed-out low contrast, text too close to edges, unrelated imagery, garbled author name, misspelled or duplicated title, misspelled author, photographic scene, centered top-banner typography, cluttered composition, gradient mush, mockup, spine, watermark
