YouTube channel banner, cinematic 16:9 aspect ratio, 2560 x 1440 pixels. Deep black gradient background (#0D0D0D to #1A1A1A) with subtle, dark geometric textures. Centered as the primary icon is a massive, intricate mechanical vault door made of matte black steel and polished gold gears. A warm, golden light glows from behind the vault, creating a sharp rim light and light rays. Below the icon, the text "Story" is in bold white serif font, and "Vault" is in premium gold metallic serif font. The tagline "A hidden vault of secrets and stories" is centered underneath in a clean, minimalist white sans-serif font. High-end luxury aesthetic, 8k resolution, photorealistic lighting, mystery and storytelling atmosphere.