
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <title>Document</title>
</head>
<body>
    <header>Header</header>
    <nav>Navigation</nav>
    <main>
        <div class="contenido">Section 1</div>
        <div class="contenido">Section 2</div>
        <div class="contenido">Section 3</div>
    </main>
    <footer>Footer</footer>
</body>
</html>