A colossal tree-city megacity grown within a massive world-spanning organism spanning kilometers, towering arboreal skyscrapers with integrated photosynthesis membranes glowing soft emerald, suspended canopy-district platforms with floating aerial garden terraces between massive organic branch formations, sleek bio-hovercraft gliding through golden sunlight between luminous leaf platforms, tiny botanists dwarfed by mountain-sized cathedral-trunks navigating between illuminated research levels, deep forest green and electric gold palette with soft dappled light filtering through infinite canopy layers, epic upward composition from forest floor traveling upward through massive root elevators emphasizes impossible bio-architectural engineering scale, photorealistic, cinematic depth of field