close-up shot of a slice of layered ice cream cake on a gray plate, showcasing its stunning rainbow gradient layers. Starting from the bottom, capture a dark chocolate cookie crust layer, followed by distinct bands of ice cream in ascending shades: strawberry pink, vibrant purple, and finally a pure white vanilla layer on top. Each layer should be cleanly defined and appear perfectly frozen, with a smooth, creamy texture. The top should be decorated with a combination of garnishes: warm chocolate fudge drizzled dramatically down the sides, pieces of chocolate bars arranged artistically, and a generous scattering of colorful cosmic sprinkles in shades of pink, purple, blue, and silver. The chocolate drips should be caught mid-cascade, creating an appealing dimensional effect. Some of the ice cream layers should show a slight marbling effect where the colors naturally blend at their boundaries. The lighting should be focused to highlight the various textures and colors while maintaining the ice cream's fresh, just-cut appearance without melting. Small multicolored sprinkles should be scattered around the base of the slice on the plate. The overall composition should evoke both professional ice cream parlor quality and playful, cosmic-inspired whimsy. The background should be dark and moody to make the vibrant colors pop