nav ul{
  padding: 0px;
  margin: 0px;
  list-style-type: none;
  font-family: calibri, serif;
 
  
}
p
{
	background-color:rgba(255, 255, 255, 0.7);
}
nav li a{
	display : block ;
	 text-decoration : none ;
   color : white ;
   background-color : #333333 ;
   text-align:center;
}
nav li{
	 float:left;
  width : 230px;
  height : 40px;
  border-right : 1px solid;
  text-align  :center;
  line-height : 40px;
  margin:auto;
}


h1{
	text-align:center;
	font-size:50px;
	border-width:2px;
background-color:rgba(255, 255, 255, 0.7);
	border-radius : 7px;
	border-style:solid;
}


.bouton{
	width:50px;
	height:50px;
	
	
	
}

body{
	background: url("images/astro.jpg") fixed;
background-repeat:no-repeat;
}

.p2{text-align:center;
font-size:20px;
border:2px black solid;
margin-top:100px;
border-radius:10px;
}


.img3{	width:50%;
margin:auto;
	display:block;
	vertical-align:top;
}

.footer2{text-align:center;
	border:2px black solid;
	background-color:rgba(255, 255, 255, 0.7);
}

.p4{text-align:center;
font-size:20px;
border:2px black solid;
background-color:rgba(255, 255, 255, 0.7);
margin-top:50px;
}
.img4{	width:50%;
	margin:auto;
	display:block;
	margin-top:300px;
	vertical-align:top;
}

.p5{text-align:center;
font-size:20px;
border:2px black solid;
background-color:rgba(255, 255, 255, 0.7);
margin-top:50px;}

.p6{text-align:center;
font-size:20px;
border:2px black solid;
background-color:rgba(255, 255, 255, 0.7);
margin-top:50px;}

.img5{	width:20%;
	margin:auto;
	display:block;
	margin-top:20px;
	vertical-align:top;
}

.p7{
	text-align:center;
font-size:20px;

}
.div-text{
	
border:2px black solid;
background-color:rgba(255, 255, 255, 0.7);
margin-top:50px;
margin-left:200px;
margin-right:200px;
}

.img6{
	display:block;
	margin:auto;
}
.centre{
	width:960px;
	margin:auto;
}