Expandable Card Pattern Build smooth expand/collapse animations using CSS grid-rows, avoiding height:auto animation issues. Why grid-rows? Traditional height animation requires explicit pixel values. The technique allows smooth animation to/from height: - + = collapsed (0 height) - = expanded (natural height) Core Implementation Key Elements 1. State Management 2. Header Click Handler 3. ChevronDown Rotation 4. Grid Container Animation Timing Recommendations | Duration | Use Case | |----------|----------| | | Small cards, quick feedback | | | Chevron rotation | | | Content expansion (recommen…