Create a brand-new Korean-language summer promotion square poster for advertising and marketing.
Accurately present the text “썸머 할인행사”“30% 할인쿠폰”“행사기간 무료배송”“2026.08.01-08.31”.
Use cobalt blue, orange, light aqua, cream white, and black.
Use large 30% coupons, courier box icons, and celebratory confetti as the main elements.
Clearly divide the layout into sections, with bold and easy-to-read Korean fonts.
Do not use small print in legal-size font; keep the square frame clean.
Do not include brands, logos, URLs, QR codes, or watermarks.
Output a high-completion static PNG.
