body{
	margin:0;
	padding:0;
	background: url(bg.jpg) no-repeat center fixed; 
	-webkit-background-size: cover; /* pour anciens Chrome et Safari */
	background-size: cover; /* version standardisée */
	font-size:20px;
	font-family:arial;
	
}

 a{
	color:#fff;
	text-decoration:none;
 }

 a:hover{
	color:#212163;
	
 }
 
 h1{
	color:#212163;
 }
 
 .bienvenue{
	padding:20px;
	background-color: #fff;
	border-radius: 5px;
	font-size:16px;
/*
	border: 1px solid red;
*/
	text-align:center;
	width:50%;
/*
	height:100px;
*/
	margin-top:25px;
	margin-left:25%;
	margin-right:25%;
}
 
 .positionbouton{
	display: flex; 
	justify-content: center;
	align-items: center;
 }
 
 .bouton{
	margin:50px;
	display: block;
	background-color: #FF8600;
	border-radius: 10px;
	border: 4px double #FF8600;
	color: #ffffff;
	text-align: center;
	font-size: 20px;
	padding: 10px;
	width: 200px;
	cursor: pointer;
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	-o-transition: all 0.5s;
	transition: all 0.5s;
}
.bouton:hover{
	background-color: #ffffff;
	border: 2px solid #FF8600;
	box-shadow: 10px 5px 5px #FF8600;
	color: #212163;
	text-align: center;
	font-size: 22px;
}