Design a whimsical logo of a horse playing golf. The horse should be standing upright, holding a golf club in its front hooves, about to swing at a golf ball. Its expression should be playful and determined. The scene can include a putting green with a flag in the distance, giving a sense of a golf course. Use smooth lines, minimalistic design elements, and vibrant colors that evoke the joy of a sunny day on the course. The logo should feel fun and dynamic, with a cartoonish, light-hearted style.