Design a lightweight building with a concrete shell floating on water. The structure is anchored by floating pontoons, creating stability while allowing it to gently sway with the water’s movement. The concrete exterior should have a sleek, modern aesthetic, blending strength and minimalism. The building features both interior and exterior spaces for relaxation and recreation, with open-air terraces and platforms that allow people to enjoy the water surroundings. The design integrates harmoniously with the aquatic environment, offering both functionality and a serene, natural experience.