CSS Grid

CSS Grid is a powerful layout system for designing web pages with rows and columns.

Example: 

<!DOCTYPE html>
<html>
<head>
    <style>
        .grid-container {
            display: grid;
            grid-template-columns: auto auto auto;
            gap: 10px;
            background-color: lightgray;
            padding: 10px;
        }
        .grid-item {
            background-color: blue;
            color: white;
            padding: 20px;
            text-align: center;
        }
    </style>
</head>
<body>
    <div class="grid-container">
        <div class="grid-item">1</div>
        <div class="grid-item">2</div>
        <div class="grid-item">3</div>
    </div>
</body>
</html>