Responsive Layout Builder Instructions When building responsive layouts: 1. Identify the layout pattern (grid, sidebar, cards, etc.) 2. Start mobile-first 3. Use appropriate CSS technique (Grid vs Flexbox) 4. Add breakpoints for larger screens 5. Test across viewports Breakpoints Common Layout Patterns 1. Holy Grail Layout 2. Responsive Card Grid 3. Sidebar Layout 4. Hero Section 5. Masonry Grid 6. Sticky Header Container Queries (Modern) Flexbox vs Grid Decision | Use Flexbox | Use Grid | |-------------|----------| | Navigation bars | Page layouts | | Card content alignment | Card grids | |…