Whimsical Cartoon Mountain Inside a Lighthouse

Inside a tall seaside lighthouse, a brightly colored cartoon-style mountain diorama rises on a wooden pedestal. The mountains are softly rounded with friendly faces on the rocks, pine trees depicted as simple green triangles, and bold black outlines. The diorama uses flat, saturated colors and playful shading for a cheerful, children's-book aesthetic. The lantern-room windows frame a view of a sunlit sea with gentle waves and seagulls; warm sunset light pours over the scene, creating golden highlights on the lighthouse interior. Render in a three-quarter perspective from slightly below to emphasize the mountain diorama, with whimsical proportions and high-contrast colors.