Cinematic mechanical phoenix takeoff in Three.js

[Note: the creator shared a partial prompt. Wording below is theirs.] GOAL: Create an exceptionally detailed, cinematic, fully animated 3D experience in Three.js called MECHANICAL_PHOENIX. MOTION: GOAL Build a premium cinematic 3D scene focused on a single giant mechanical phoenix as the hero object. The phoenix should feel majestic, intricate, and visually unforgettable — a fusion of mythological elegance and advanced mechanical engineering. It should begin in a dormant or poised state, gradually come alive, unfold its wings, activate internal mechanisms, and then perform a dramatic, graceful takeoff. The full sequence must last approximately 15 seconds and should play automatically when the page loads. The result should feel like a high-end CGI reveal created in real-time 3D, not a simple demo. CORE CONCEPT A giant mechanical phoenix stands on a pedestal, platform, cliff, or dark ceremonial structure in a dramatic environment. At first it appears still, but subtle internal signs of life begin to appear: glowing eyes, moving gears, shifting plates, internal light, and tiny mechanical motions. Its body awakens, its metallic feathers begin to separate and articulate, the wings unfold in a complex layered movement, and the phoenix powers up. After a brief moment of full visual activation, it spreads its wings, pushes off, and rises into the air in a beautiful cinematic takeoff. This is not a combat scene or a full game. It is a cinematic object showcase with sophisticated animation and strong visual storytelling. MAIN FOCUS The project should focus on: - a single highly detailed 3D object - complex mechanical articulation - premium materials and reflections - layered metallic feathers - elegant wing animation - graceful camera choreography - strong lighting and atmosphere - a clear 15-second cinematic sequence PHOENIX DESIGN The phoenix must be highly detailed and visually rich. It should look like a true mechanical creature, not a simple robot bird. Include: - a beautifully sculpted phoenix silhouette - an elegant long neck - a detailed head and beak - glowing eyes - articulated metallic feathers - layered wing structures - exposed gears, pistons, joints, rods, and internal mechanisms - segmented tail feathers - mechanical legs and claws - subtle glowing internal energy core or illuminated internal sections The design should combine beauty and engineering sophistication. The feathers are extremely important. Each wing should be made of multiple layers of metallic feather-like panels or articulated pieces. They should unfold in a visually satisfying sequence. Avoid rigid flat wings or a simple bird shape with no layered structure. Use premium materials such as brushed gold, bronze, dark steel, polished metal, carbon-like detail, and glowing internal accents. The phoenix should feel expensive, elegant, and carefully art-directed. ENVIRONMENT Place the mechanical phoenix in a dramatic but not overly distracting setting. Good options include: - a dark ceremonial platform above clouds - a futuristic ped