<!DOCTYPE html>
<html lang="es">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width">
<title>font-family</title>
<style>
h1 {
font-family: sans-serif
}
p {
font-family: serif
}
</style>
</head>
<body>
<h1>font-family sans-serif</h1>
<p>font-family serif.</p>
</body>
</html>