Flexbox

Flexbox (Flexible Box Layout) is a one-dimensional CSS layout method designed for arranging items in rows or columns. It excels at distributing space between items, aligning content both horizontally and vertically, and handling dynamic or unknown sizes. Flexbox is perfect for navigation menus, card layouts, centering content, and any situation requiring flexible item arrangement.

To create a navigation bar where items are evenly spaced and vertically centered, apply display: flex to the container, then use justify-content: space-between to distribute items horizontally and align-items: center to center them vertically. For a card that should fill remaining space in a row, simply add flex: 1 to that element.