Knowing Flexbox and Grid is important for modern web design. Float and table layout — outdated. MDN Flexbox and MDN Grid — complete guide.
Flexbox
One-dimensional layout. display: flex, justify-content, align-items, gap. Navigation menus. Card rows. Centering.
CSS Grid
Two-dimensional layout. display: grid, grid-template-columns, gap. Complex page layouts. Galleries. Dashboards.
Which to use?
Simple single-row layout → Flexbox. Complex two-dimensional layout → Grid. Often best to use both together!
Source: MDN Flexbox, CSS-Tricks Grid Guide
