Design a futuristic, modernist spherical house made of exposed concrete, inspired by mid-20th-century architecture. The house has a smooth concrete surface with minimalistic textures, large curved windows offering panoramic views, and clean, simple lines. The structure is located in a lush, temperate, humid environment with abundant vegetation: tall trees, ferns, and grass, all reflecting the regional climate. The sky is clear and bright, with a few light clouds, showcasing a sunny day. The house integrates organically with its surroundings, featuring a minimalist garden with concrete pathways, blending modern design with nature. The overall atmosphere is serene, with shadows cast by the sun on the curved surfaces of the concrete structure.