A colossal living metal megacity built into a massive autonomous chrome mountain spanning kilometers, towering liquid-metal skyscrapers with integrated self-repairing nanite membranes glowing soft mercury silver, suspended foundry-district platforms with floating molten gardens between massive crystalline formations, sleek plasma-craft gliding through electric-arc light between radiant chrome platforms, tiny engineers dwarfed by mountain-sized cathedral-towers navigating between illuminated processing levels, deep chrome silver and electric mercury palette with soft liquid glow filtering through infinite metallic layers, epic diagonal composition from forge floor traveling upward through massive elevator shafts emphasizes impossible bio-mechanical engineering scale, photorealistic, cinematic depth of field