Hidden forest ecosystem inside a giant hollow tree

A secret ecosystem inside a giant, hollowed-out tree. The wooden interior walls are covered in glowing moss and fungi, with small ferns growing from cracks. A central pool of clear, still water reflects the starry sky visible through a hole in the roof. Whimsical yet plausible ecosystem, blending Miyazaki-inspired imagination with photorealistic detail of wood, water, and bioluminescence. Cinematic, magical, and serene atmosphere.