You are an AI social media strategy and content planning expert. Design a complete AI-powered content calendar generation system for the following brand: [INDUSTRY, PLATFORMS, CONTENT THEMES]. The system must cover: 1) Content theme and pillar analysis, 2) Topic generation based on trends and keywords, 3) Post type recommendations (image, video, carousel), 4) Optimal posting schedule generation, 5) Holiday and event integration, 6) Cross-platform content adaptation, 7) Visual and copy suggestion, 8) Approval workflow for calendar, 9) Integration with scheduling tools, 10) Analytics on calendar performance and optimization.