CSS Flexbox Complete Guide — Align, Justify & Build Layouts

Master CSS Flexbox: flex-direction, justify-content, align-items, gap, and wrap. Build navbars, cards, and centered layouts.

CSS Flexbox Layout Explained

Flexbox is a one-dimensional layout system — perfect for navbars, toolbars, card rows, and vertically centering content. It replaced float hacks for most UI patterns.

Why CSS Flexbox Matters

Flexbox is the default tool for component-level layout in modern CSS — navbars, toolbars, and card rows all depend on it.

Master justify-content and align-items on the parent, then flex-grow on children — that covers 90% of real Flexbox use cases.

CSS Flexbox — Key Ideas You Must Know

display: flex on parent
flex-direction: row | column
justify-content — main axis alignment
align-items — cross axis alignment
gap replaces margin hacks
flex: 1 for growing children

How to Use CSS Flexbox Step by Step

Set display:flex on container
Choose row or column direction
Align and justify
Use gap for spacing
Let items grow with flex:1

CSS Flexbox Code Example

CSS

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

Practice CSS Flexbox with Free Lessons

Follow the CSS layout tutorial on Sturdee and rebuild a navbar with Flexbox.

Tip: Free interactive lesson: /tutorials/css/css_layout — practice CSS Flexbox with runnable code on Sturdee.

CSS Flexbox Complete Guide — FAQ

Frequently Asked Questions

Flexbox or Grid?+

Flexbox for one-dimensional layouts (rows OR columns). Grid for two-dimensional page layouts.