Celestial Compass in Underground Watercolor Tunnels

Watercolor painting of a celestial compass carved into the damp wall of ancient underground tunnels. Soft washes of blue, indigo, and moss green with warm gold highlights. A glowing compass rose centers the scene, its needles pointing to constellations that drift along the tunnel arches. Rough stone walls are damp, with dripping water and faint bioluminescent moss. A thin beam of pale light from a distant skylight washes over the compass, creating shimmering reflections in pooled water on the floor. Perspective recedes into a series of arches, giving depth and mystery. Style is watercolor with wet-on-wet textures, soft edges, and visible paper texture, dreamlike and otherworldly; atmosphere moody and silent.