<ul data-eligibleForWebStory="true">CSS Flexbox is a layout module that efficiently aligns and distributes space among items in a container.Flex Container: The parent element with display: flex or inline-flex. Flex Items: Children of the flex container.Flex Container Properties include Flex Direction, Flex Wrap, Flex Flow, Justify Content, Align Items, Align Content, and Gap.Flex Direction defines main axis direction. Flex Wrap controls item wrapping. Flex Flow combines direction and wrapping.Justify Content aligns items on the main axis. Align Items aligns items on the cross axis. Align Content manages lines in multiple line containers.Gap sets gaps between items. Flex Items Properties include Order, Align Self, Flex Grow, and Flex Shrink.Order defines item order. Align Self overrides alignment. Flex Grow controls item growth. Flex Shrink manages item shrinking.Best practices include testing responsiveness, avoiding overusing grow/shrink, combining properties efficiently, and debugging with DevTools.Mastering Flexbox properties helps create flexible layouts. Properties like flex-direction, justify-content, order, and flex-grow are crucial.Web Story Eligibility: true