CSS Flexbox makes it easy to create flexible, responsive layouts without using float or positioning. It works by defining a flex container that holds flex items. Flexbox is supported in all modern browsers.
CSS Flexbox Container
CSS Flex containers use the display: flex property to arrange items flexibly. Important properties include flex-direction to set the layout direction and justify-content to control alignment. For perfect centering, use both justify-content: center and align-items: center.
CSS Flexbox Items
Flex items are the child elements of a flex container and their behavior can be changed using properties like order, flex-grow, and align-self. The order property changes the visual order of the items, while flex-grow controls how much an item expands. The align-self property allows individual items to have different alignments from the rest.