CSS Flexbox is a layout module that makes it easier to create flexible and responsive layouts in CSS. It provides a simple and powerful way to align elements within a container and distribute space between them.To use flexbox, you need to set the display property of an element to "flex". You can do this by adding the following rule to your CSS:.container { display: flex;}The flex container will now have two main axes: the main axis and the cross axis. By default, the main axis runs horizontally and the cross axis runs vertically. You can change this by setting the flex-direction property:.con...