Create a brand-new Korean celebration promotion vertical poster.
Accurately present the text “축하해 스무살”“CELEBRATION SALE”“25% OFF”“2026.08.18-08.25”.
Use cobalt blue, coral orange, mint green, cream white, and plum purple.
Include a single rose, layered celebration cards, and a large promotional ribbon.
Balance Korean and English typography—bold, sturdy, and optimized for mobile reading.
Add restrained paper shreds and elegant shadows.
Do not feature any brand names, social media icons, logos, website URLs, QR codes, watermarks, or tiny text.
Output a high-quality static PNG image.
