.header {
	height: 30px;
	width: 800px;
}
.contenu {
	height: 600px;
	width: 547px;
	float: left;
}
.enveloppe {
	margin-right: auto;
	margin-left: auto;
	height: 600px;
	width: 800px;
}
.menu {
	margin-top: 20px;
}

.right {
	height: 470px;
	width: 240px;
	float: left;
}