body{
	text-align:center;
	background-color:rgb(37,253,233);
	background-size:cover;
}
h1{
	color:rgb(11,22,22);
	text-decoration:underline;
	font-size:40px;
	font-style:italic;
	text-transform:uppercase;
	word-spacing:4px;
	text-shadow:1px 1px black;
	text-align :center;
}
table{margin: auto;}
td{text-align :center;}
ul{
	text-align:left; /*alligner le menu à droite*/
}
.menu{
	position:fixed;
}
.li:hover{
	color: red;
}
img{
	width:100px;
	height:100px;
	border:1px solid black;
}
.btn-suiv{
	float:right;
}
.btn-retour{
	float:center;
}
.btn-prec{
	float:left;
}