Magical Christmas Sleigh Night Poster

Professional Christmas greeting poster, vertical, storybook gouache illustration. [Colors] midnight indigo #1E2A63 fading to periwinkle #6C7FC4, moonlit lavender #C3CCE8 snow, warm amber #E39A3C window light, deep pine #2C5B4A. [Layout] wide painterly script wordmark across the top, a cloud-framed oval opening into a snowy valley, cabin at left, sleigh at right, caption block and QR code at the bottom. [Typography] fluid brush-script headline, small condensed sans for the closing line and date. [Subject] Santa standing in a red sleigh piled with wrapped boxes, a reindeer trotting ahead in reins, snow-laden cabin, full moon, distant peaks. [Lighting & mood] cool moonlit night with warm window glow, calm and magical. [Details] visible brush texture, soft falling snow, reflected light on a small pond. Text: "MERRY CHRISTMAS", "DEC 25".