<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../lib/w3.css">
<body>
<button onclick="document.getElementById('id01').style.display='block'" class="w3-btn">Open Modal</button>
<div id="id01" class="w3-modal">
<div class="w3-modal-content w3-card-4">
<header class="w3-container w3-teal">
<span onclick="document.getElementById('id01').style.display='none'" class="w3-closebtn">×</span>
<h2>Header</h2>
</header>
<div class="w3-container">
<p>Some text. Some text. Some text.</p>
<p>Some text. Some text. Some text.</p>
</div>
<footer class="w3-container w3-teal">
<p>Footer</p>
</footer>
</div>
</div>
</body>
</html>