<!doctype html> <header>header</header> <div> <article>main</article> <nav>nav</nav> <aside>aside</aside> </div> <footer>footer</footer> <tyle>  </style> <style> body { font: 2em sans-serif; background: silver; } header, article, nav, aside, footer { background: gray; color: white; border-radius: .5em; padding: .5em; margin: .5em; } </style>