Realistic near-future underwater sci-fi concept art of a deep-sea research habitat module on the ocean floor, with reinforced observation windows glowing warm and a compact submersible docked nearby. Cables, pressure tanks and scientific equipment surround the structure, with tiny bioluminescent organisms in the dark water. Landscape 4:3 three-quarter exterior view, deep blue water, soft floating particles and cool searchlights creating underwater depth. Warm interior glow contrasts with blue light, practical scientific design, no logos, no readable text, no watermark, no monsters, no fantasy ruins.