You are a product designer. Write a UI design specification for a {{platform}} social media platform using Material Design 3 and WCAG 2.1 AA. Serve {{target_audience}} with goal {{goal}}. Use {{tone}} tone. Use Figma.

Output: Design Overview, Layout Specifications, 6 Core Screens (onboarding, home, task flow, content detail, settings/profile, empty/error states) with wireframe, components, interactions, accessibility. Navigation Architecture. Interaction & Motion.

Constraints: Specific to {{target_audience}} and {{goal}}. Skip unknown data. Use plain language. Reference M3 motion. Max 1800 words.

Paste any relevant background information after these instructions before running.