Create a brand-new Korean customer appreciation event square coupon poster.
Accurately present the text “고객감사제”“사전입장권”“예약 고객 전용”“2026.08.19-08.26”.
Use cobalt blue, coral orange, mint green, cream white, and plum purple.
Place a large task-style admission ticket diagonally on a stacked square background.
Korean titles and coupon labels must be bold and clear.
Add soft geometric paper art shapes, stars, and subtle three-dimensional effects.
Do not include store names, brands, logos, website URLs, QR codes, watermarks, or tiny text.
Output a high-quality static PNG.
