<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<body>
<h1 style="font-size:10vw;">Responsive Header</h1>
<p style="font-size:5vw;">Text text text text text text text
text text text text text text text text text text text text
text text text text text text</p>
</body>
</html>