Modern CSS gives developers two powerful layout systems: Flexbox and CSS Grid. Both make building layouts easier, but they solve different problems. Many beginners try to pick one over the other — when in reality, professional developers use both together. In this guide, you will learn what Flexbox and CSS Grid are, the key differences between them, when to use each one, and how to combine them for real-world projects. What is CSS Flexbox? Flexbox (Flexible Box Layout) is a one-dimensional layout system. It works along a single axis — either a row or a column — making it perfect for aligning items in one direction at a time. Flexbox is best when you need to align, distribute, or space items inside a container without worrying about the other axis.…