Goal: Create a polished Japanese proposal-style idea sheet for a casual mobile puzzle game where players collect 3 matching pies to clear them, titled {argument name="headline text" default="パイを3つ集めて消す カジュアルゲーム 4テーマ案"}. The sheet should look like a cheerful game design concept board, with cute UI mockups and explanatory diagrams.
Canvas: Wide landscape 16:9 presentation sheet, warm cream background, thin rounded border, tiny sparkles and dessert decorations. Use a soft pastel kawaii illustration style with clean vector-like edges, subtle shadows, glossy game UI highlights, and high readability.
Layout: Divide the canvas into exactly 4 large rounded theme panels arranged in a 2×2 grid. Each panel has a numbered badge, a Japanese theme title banner, a smartphone gameplay mockup on the left, and instruction/example cards on the right. Add a bottom strip with exactly 4 short feature notes and icons.
Main title: At the top center, show a small pie icon followed by the large headline. Emphasize the number “4” in pink and add a small heart at the end.
Panel count and themes: Use exactly 4 theme concepts.
1. Pink dessert cafe theme titled {argument name="theme 1 title" default="ストロベリースイーツカフェ"}, with strawberry shortcakes, berry tarts, whipped cream, pink trays, and a cute bunny cafe mascot.
2. Yellow picnic theme titled {argument name="theme 2 title" default="アニマルピクニック"}, with a red-checkered picnic cloth, wicker basket tray, small animal friends, fruit pies, and sunny outdoor greenery.
3. Green fantasy woodland theme titled {argument name="theme 3 title" default="フェアリーフォレストベーカリー"}, with a magical forest bakery, mushrooms, lanterns, fairy-like character, berry pies, wooden tray, vines, leaves, and warm glowing lights.
4. Blue ocean dessert theme titled {argument name="theme 4 title" default="オーシャンデザートパーティー"}, with underwater pastel scenery, coral, shells, sea creatures, shell-shaped desserts, and a shell-decorated tray.
Smartphone mockups: Each of the 4 panels must include exactly 1 vertical phone screen on the left, for a total of 4 phones. Every phone shows a cute match-3-like pie collection game screen with a top HUD showing “Lv.15”, score “2,480”, and a pause button. In each game board, show many individual pies on a themed background, plus a bottom deck/tray with empty slots and a white hand cursor tapping or dragging a pie. Include a small yellow arrow indicating movement toward the tray.
Instruction cards: In each of the 4 panels, include a top explanation card headed “遊び方” with exactly 3 illustrated steps from left to right: tap a pie and put it into the deck, collect 3 of the same pie to clear them, and if the deck becomes full it is GAME OVER. Below it, include exactly 2 smaller example cards: one green/positive card labeled “3つそろえて消える例” showing 3 matching pies clearing with sparkles, and one red/warning card labeled “デッキがいっぱいの例” showing a full tray and the text “GAME OVER” with an exclamation warning icon.
Bottom strip: Add exactly 4 feature notes separated across the bottom, each with one icon: a hand icon with “かんたん操作 / タップだけのシンプル操作！”, a lightbulb icon with “3つそろえる爽快感！ / そろえるとパッと消えて気持ちいい♪”, a heart icon with “かわいいパイがいっぱい！ / 見ているだけで癒される4つの世界♪”, and a warning icon with “デッキが満杯になる前に / うまくそろえてハイスコアを目指そう！”.
Visual constraints: Keep all Japanese text crisp and legible, use rounded friendly fonts, maintain a consistent proposal-board layout, avoid photorealism, avoid dark or gritty styling, avoid extra panels, avoid extra phones, and do not add watermarks or logos.
