<html lang="fr">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="2.css"/>
<title></title>
</head>
<body>
<nav class="menu">
<article class="menu__item">Élément 1</article>
<article class="menu__item">Élément 2</article>
<article class="menu__item">Élément 3</article>
<article class="menu__item">Élément 4</article>
</nav>
<main class="main">
<section class="main__content">Le contenu principal</section>
<aside class="main__complement">
<section class="main__sub-content">Sous-contenu principal</section>
<aside class="main__sub-complement">Sous-contenu secondaire</aside>
</aside>
</main>
</body>
</html>