Create an original square English giveaway poster with a soft green background, gift bag, small product cards, a centered white offer panel, and a lime button. Text: “WEEKLY GIVEAWAY”, “MYSTERY FREE GIFT”, “Value $29”, “SHOP NOW”. Keep green, cream, black, and lime tones with two small stars and sparse dots only. No logo, watermark, QR code, website, non-English text, or random tiny text.