body {
	font-family: Calibri, Arial, Helvetica, sans-serif;
}

header {
	background-image: url(https://static.blog4ever.com/2011/09/532876/fond-banniere_8935956.jpg);
	background-position: top;
}

nav li {
	margin-right: 40px;
}

nav a {
	font-size: 20px;
}

aside li {
	font-size: 16px;
}

#articles_show_contenu_article, .articles_index_contenu_article {
	font-size: 15px;
}