A card back, in the style of [art nouveau], featuring [flowing curves], [romantic pastels], [soothing blue], and [stylized nature]. drawn all the way to the edges with no background visible. the card back should have a unique design, with elements of fluidity and movement, flat with no shadow, no script, while still maintaining a cohesive look and feel. the overall design should evoke a sense of [whimsy and wonder], beauty, and [timeless elegance], the final product should be high-quality, vector artwork, suitable for printing on the backs of standard playing cards.