A festive cartoon illustration set against a solid red background. Santa Claus rides in a red and yellow sleigh pulled by a cheerful reindeer with a red nose. Santa wears his traditional red and white outfit with a hat and holds the reins. The sleigh contains a large green sack and a candy cane. The overall atmosphere is joyful, playful, and full of Christmas spirit. The composition is vertical and centered, optimized for mobile wallpaper.