Create a new original coupon or sale design: high-impact seasonal sale poster with dimensional display lettering, layered paper shapes, confetti, and a clear central offer.
Style: clean commercial graphic, polished and print-ready, with harmonious charcoal, electric cyan, and tangerine.
Layout: Square promotional composition with a strong centered hierarchy and balanced margins.
Main text exactly: "KHUYẾN MÃI ĐẶC BIỆT", "GIẢM 40%", "ĐẾN 31.08.2026".
Language: Vietnamese; keep that language and script only, preserve its natural typographic hierarchy, and do not translate.
Design changes: use a different dominant palette, rearrange icons and patterns, and redesign borders, corners, perforations, shadows, gradients, and decorative angles.
Background: Use a newly colored commercial backdrop with no copied texture or decoration.
Remove every brand, store or platform name, logo, watermark, website, QR code, author mark, barcode, and any note beginning with "*".
Avoid exact copying, original colors, copyrighted elements, random text, tiny unreadable legal text, misspellings, fake logos, and scannable codes.
