Responsive Design and Modern CSS

Create flexible layouts using CSS Flexbox including flex-direction, justify-content, and align-items

Build two-dimensional layouts using CSS Grid with grid-template-columns and grid-template-rows

Position elements using static, relative, absolute, and fixed positioning for specific use cases like overlays or fixed headers

Use relative units including em, rem, percentages, and viewport units for responsive sizing

Implement responsive design using media queries to adapt layouts for different screen sizes

Implement a mobile-first design approach by writing CSS for small screens first and progressively enhancing for larger screens

Style interactive elements using pseudo-classes including hover, focus, and active

Add decorative elements and icons using CSS pseudo-elements including ::before and ::after

Apply CSS transitions to create smooth animations on property changes