Introduction
W3.CSS is a free, lightweight CSS framework by W3Schools. No JavaScript needed!
Add it to any page: <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
Responsive Grid
<div class="w3-row-padding">
<div class="w3-third">Column 1</div>
<div class="w3-third">Column 2</div>
<div class="w3-third">Column 3</div>
</div>Common Classes
w3-container — padding 16pxw3-card-4 — card with shadoww3-button — buttonw3-round — roundedw3-animate-* — animationsw3-responsive — responsive table