<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Header Grid</title>
<style>
.header-grid {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: 10px;
background-color: #f8f9fa;
padding: 10px;
}
.header-item {
background-color: #007bff;
color: white;
padding: 10px;
text-align: center;
}
</style>
</head>
<body>
<div class="header-grid">
<div class="header-item">Column 1</div>
<div class="header-item">Column 2</div>
<div class="header-item">Column 3</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Header Grid with Bootstrap</title>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row bg-light p-3">
<div class="col bg-primary text-white text-center p-2">Column 1</div>
<div class="col bg-primary text-white text-center p-2">Column 2</div>
<div class="col bg-primary text-white text-center p-2">Column 3</div>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.5.4/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</body>
</html>