Japanese Ghost Mascot Style Guide

Prompt

{"type":"Japanese character introduction / mascot style guide poster","canvas":"landscape 4:3 poster on warm off-white paper, clean editorial layout, rounded rectangular panels with thin navy outlines, flat vector illustration, minimal cute mascot design, navy typography and line art, accent yellow blocks","title":{"text":"{argument name=\"main title\" default=\"おばけキャラクター紹介\"}","position":"top left","style":"large bold dark navy Japanese sans serif"},"subtitle":{"text":"{argument name=\"subtitle text\" default=\"『気づいたら、街が本でできてたんです。』より\"}","position":"under title","style":"smaller dark navy Japanese text"},"character":{"name":"{argument name=\"character name\" default=\"small ghost mascot\"}","appearance":"simple white cloth-like ghost with rounded dome head, soft wavy hem, tiny oval navy eyes, no mouth, soft friendly silhouette, small dangling legs or feet depending on pose","line_style":"thick smooth dark navy outline, minimal interior folds","personality":"gentle, curious, slightly shy, book-loving neighborhood spirit"},"layout":{"sections":[{"title":"メインビジュアル","position":"left center","count":1,"content":"large main ghost seated and reading, two small oval eyes, white body with navy outline, feet visible in front, small folds in cloth hem","label_style":"small navy pill label with white Japanese text"},{"title":"参考ビジュアル","position":"top right","count":1,"content":"framed reference illustration showing the ghost walking or sitting along a bright yellow street or bookshelf-like path while holding and reading a blue book; includes a potted plant and simplified architectural/bookstore details","frame":"rounded navy rectangle"},{"title":"基本ポーズ","position":"middle right","count":4,"labels":["すわって読む","ただずむ","のぞく","のんびり歩く"],"content":"four separate navy line drawings of the ghost mascot: 1 seated reading with feet out, 2 standing still with two small legs, 3 peeking from behind a vertical wall edge, 4 leisurely walking with small feet"},{"title":"キャラクターの特徴","position":"bottom left","count":5,"labels":["白い布のような形","小さな目","やわらかい輪郭","のんびりした存在","街にひそむ小さな発見"],"content":"feature list in Japanese with five bullet points"},{"title":"カラー","position":"bottom center","count":3,"labels":["アウトライン ネイビー","ボディ オフホワイト","アクセント イエロー"],"content":"three color swatches: dark navy, off-white, bright yellow","colors":{"outline":"{argument name=\"outline color\" default=\"deep navy\"}"...