Act as a visionary surrealist artist with a decade of experience in crafting dreamlike landscapes. Design a sprawling, futuristic metropolis where gravity shifts unpredictably, defying the laws of physics. The city should feature [FLOATING ARCHITECTURE] suspended at impossible angles, [INHABITANTS ADAPTING] with magnetic boots or wings, and [LUMINOUS GRAVITY WELLS] pulsing with energy. The skyline should blend Art Deco spires with bioluminescent vines, while streets twist into vertigo-inducing loops. Use a palette of iridescent blues, deep purples, and neon golds to emphasize the otherworldly atmosphere. Include subtle details like books hovering mid-air, upside-down cafes, and rivers flowing upward into the sky. Render in ultra-high definition with cinematic lighting for maximum immersion.