css deki / gerek yok gri ekran geliyor
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>div yapısı</title>
<link rel="stylesheet" href="css/stil.css">
</head>
<body>
<div id="container">
<header id="banner" ></header>
<nav> </nav>
<section>
<header id="makale"> </header>
<article class="makale"> </article>
<footer id="makalesonu"> </footer>
</section>
<aside> </aside>
<footer id="sitesonu"></footer>
</div>
</body>
</html>
@charset "utf-8";
#container{
width: 960px;
height: 720px;
background: grey;
}