リングの中のひよこ

A simple diary planner transparent PNG asset of a duckling floating inside a small round swim ring, cute flat illustration, no text, cute flat illustration style, single isolated object, object only, centered, clean bold silhouette, smooth edges, clean edges, solid light gray background, generous empty margin around the object, no white outline, no sticker border, no cut edge, 1024x1024.
Background removal requirements: single isolated design element, centered composition, solid light gray background, flat uniform light gray backdrop, high contrast between the design and the background, smooth edges, generous empty margin around the design, flat planner PNG asset style.
Flatness requirements: flat vector illustration, no depth, completely flat, 2D only, no lighting direction, no realistic shading.
Shadow layer ban: no drop shadow, no cast shadow, no ambient occlusion, no contact shadow, no soft gray halo, no shadow under or around the asset.
Effect ban: no 3D effect, no bevel, no emboss, no paper lift, no raised edge, no glow.
Edge construction: object only, clean edges, no white outline, no sticker border, no cut edge, no separate border layer.
Avoid: no drop shadow, no cast shadow, no ambient occlusion, no reflection, no glow, no textured background, no gradient background, no photo realism, no mockup scene, no hand holding the asset, no white outline, no sticker border, no cut edge, no die-cut edge.