Isometric arctic energy-grid diorama, sweeping circular underground infrastructure replacing square excavation, cylindrical residential towers with rounded corners, deep navy, slate blue, frosted silver and warm amber palette, glowing turquoise energy conduits weaving through layered subterranean chambers, curved transit tunnels, organic snow-covered terrain, sculptural winter trees, dynamic aerial three-quarter angle, ultra-detailed miniature 3D render, tilt-shift effect, cinematic polar night lighting, softly illuminated windows, futuristic sustainable city concept, clean dark gradient background.