body
{	background-color: rgb(50,50,50);
	font-family:  Comic Sans MS,Arial, Times, sans-serif;
}

h1
{
	text-align: center;
	width: 500px;
	margin: 40px auto;
	/* pour l'esthétique */
	font-family: "Viner Hand ITC", "Comic Sans MS",Arial, Times, sans-serif;
	color: #000000;
	height: 45px;
	padding: 10px;
	background-image: url("degrade.png");
	background-repeat: repeat-x;
	
}

.accueil
{
	Width:450px;
	margin:auto;
}
.accueil a:visited
{
	color:rgb(121,127,127);
}


.nav
{
	color:white;
	width:20%;
	display:inline-block;
	vertical-align:top;
	margin-top:50px;
	
}
.nav  a
{
	color:rgb(210,210,210);;	
	font-size:large;
	font-style:italic;
	text-decoration:underline;
}

.nav a:visited
{	
	color: rgb(130,130,130);
	
}
.nav a:hover
{
	color:yellow;
	font-style:italic;
	text-decoration:underline;
}



 
ul
{
	list-style:none;
}







.section
{	
	margin-top:50px;
	width:25%;
	display: inline-block;
	vertical-align:top;
}

.section p
{
	color:white;
	text-align:center;
}	



.section a 
{
	display: inline-block;
	border:2px solid black;
	line-height:1px;
}
.section a:hover
{
	border:2px solid rgb(127,127,127);
	transform: scale(1.1,1.1);
}

.section2
{
	color:white;
	margin-top:50px;
	width:25%;
	display: inline-block;
	

}



.centre_accueil
{
	margin-top:50px;	
	width:78%;
	height:500px;
	display:inline-block;
	vertical-align:top;
	position:relative;
	text-align:center;

	
}

.centre_accueil p
{
	color:white;
	font-size:x-large;
	margin-top:-60px;
}	
.centre
{	
	margin-top:50px;	
	width:53%;
	height:500px;
	display:inline-block;
	vertical-align:top;
	position:relative;
	
	
}

.centre img
{
	
	position: absolute;
	border: 2px solid rgb(100,100,100);
	margin: auto;
	top:20px;
	bottom:0;
	left:0;
	right:0;
}
.centre p
{
	text-align:center;
	color:white;
	font-size:large;
	margin-top:-50px;
	margin bottom:20px;
}
<!--.centre_or
{	
	margin-top:50px;
	width:53%;
	height:500px;
	display:inline-block;
	vertical-align:top;
	position:relative;
}
.centre_or p
{
	padding-left:15%;	
	text-align:left;
	text-indent:30px;
	font-size:large;
}-->