body, html {
	height: 100%;
	width: 100%;
	margin: 0;
	padding: 0;
	background: url(./bg_acier.jpg);
	color: #fff;
}

h3 {
	padding-left: 5px;
	color: black;
	text-decoration: underline;
	font-size: 180%;
}

p {
	padding: 5px;
}

div#titre {
	position: absolute;
	height: 15%;
	width: 70%;
	top: 0;
	left: 15%;
	padding: 2% 0 0 0;
	text-align: center;
	font-size: 120%;
	line-height: 15%;
}

div#titre h1 {
	color: gray;
}

div#contenu_principal {
	position: absolute;
	height: 70%;
	width: 70%;
	top: 15%;
	left: 15%;
	padding: 0;
	margin: 0;
	border: medium solid black;
	border-top: none;
}

div#contenu {
	position: absolute;
	height: 100%;
	width: 100%;
	background-color: #d3d3d3;
	color: #000;
	overflow: auto;
}

div#contenu p {
	padding: 0 15px 0 15px;
}

div#contenu p#introduction {
	padding-top: 35px;
}

div#contenu p#validation {
	text-align: right;
}

div#contenu p#validation a img {
	border: none;
}

div#contenu p.invisible {
	display:none;
}

div#navigation {
	position: absolute;
	height: 25px;
	width: 70.2%;
	top: 15%;
	left: 15%;
}

ul#menu
{
	height: 25px ;
	margin: 0 ;
	padding: 0 ;
	background-color: gray;
	list-style-type: none ;
	border-top: medium solid black;
	border-left: medium solid black;
}

ul#menu li
{
	float: left ;
	text-align: center ;
}

ul#menu li a
{
	width: 125px ;
	line-height: 25px ;
	font-size: 1.2em ;
	font-weight: bold ;
	letter-spacing: 2px ;
	color: white;
	display: block ;
	text-decoration: none ;
	border-right: 2px solid black;
}

ul#menu li a:hover
{
	color: white;
	background-color: black;
}

div#pied {
	position: absolute;
	height: 15%;
	width: 70%;
	bottom: 0;
	left: 15%;
	text-align: center;
	overflow: auto;
}


div#hautg {
	position: absolute;
	height: 15%;
	width: 15%;
	top: 0;
	left: 0;
}

div#hautd {
	position: absolute;
	height: 15%;
	width: 15%;
	top: 0;
	right: 0;
}

div#basg {
	position: absolute;
	height: 15%;
	width: 15%;
	bottom: 0;
	left: 0;
}

div#basd {
	position: absolute;
	height: 15%;
	width: 15%;
	bottom: 0;
	right: 0;
}