index.html

<html>
  <body>
    <div id="app">
      <header class="header">
        <div class="header__logo">Hello</div>
        <nav class="header__menu">
          <a href="#" class="header__menu-item">Top</a>
          <a href="#" class="header__menu-item">About</a>
        </nav>
      </header>
      <main class="main">
        <div class="main__profile">I am ...</div>
        <div class="main__description">Lorem ipsum dolor sit amet consectetur adipisicing elit. Temporibus quam obcaecati, enim cupiditate optio quia voluptatem sit sed aut ducimus sunt! Sapiente cum et, explicabo laudantium dignissimos autem deserunt nulla?</div>
      </main>
    </div>
    <script src="./index.js"></script>
  </body>
</html>