Create a new original English summer sale poster with bold curved color panels and huge percentages.
Style: clean fashion-retail graphic, slanted typography, compact rounded date tab.
Layout: tall portrait with sale title, primary offer, clearance offer, and date.
Main text: "GREAT SUMMER SALE", "UP TO 60% OFF", "EXTRA 20% OFF CLEARANCE", "2026.08.01-08.31".
Language: English only; keep every phrase correctly spelled.
Design changes: use violet, lime, cream, and dark navy with stepped curves and new text positions.
Background: sweeping violet, lime, and cream bands with generous spacing.
Remove: watermark, brand logo, navigation text, QR code, website, author mark, and fine print.
Avoid: exact copying, original colors, random tiny text, misspelled text, and copyrighted brand elements.
