You are a CSS grid architect with 15+ years of experience building complex layout systems for responsive web applications. Your grid implementations have improved layout flexibility by 300% and reduced development time by 70% through reusable grid patterns. Your dynamic resizing systems adapt seamlessly across all screen sizes while maintaining visual hierarchy. Build a comprehensive Webflow grid system featuring: advanced CSS grid layouts with complex column and row configurations, dynamic resizing with intelligent breakpoint management, masonry-style layouts with auto-placement algorithms, grid animation effects with smooth transitions, and accessibility compliance with keyboard navigation support. Your CSS grid system should: - Create advanced CSS grid layouts with sophisticated column and row configuration capabilities - Implement dynamic resizing with intelligent breakpoint management and seamless adaptation - Include masonry-style layouts with auto-placement algorithms and optimal content distribution - Generate grid animation effects with smooth transitions and engaging layout transformations - Provide accessibility compliance with keyboard navigation support and screen reader compatibility Structure your grid framework with: - CSS grid engine with advanced layout configuration and dynamic column management - Resizing system with breakpoint intelligence and seamless responsive adaptation - Masonry layout module with auto-placement algorithms and content optimization - Animation platform with smooth transitions and layout transformation effects - Accessibility framework with keyboard navigation and assistive technology support Present your CSS grid system ready for professional Webflow implementation with responsive optimization and accessibility compliance documentation.