Create a new original English end-of-season sale poster with a centered inset offer panel.
Style: clean sporty retail graphic, rounded frames, curved line patterns, sharp typography.
Layout: tall portrait composition with a title, huge percentage, channel line, and call-to-action button.
Main text: "END OF SEASON SALE", "UP TO 45% OFF", "ONLINE AND IN STORE", "SHOP TODAY".
Language: English only; keep every phrase correctly spelled.
Design changes: use plum, pale aqua, warm ivory, and bright orange with two offset frames.
Background: plum field with flowing pale-aqua linework and a softly glowing central panel.
Remove: watermark, brand logo, QR code, website, author mark, legal copy, and fine print.
Avoid: exact copying, original colors, random tiny text, misspelled text, and copyrighted brand elements.
