#container 
{ 
	margin-left: auto; margin-right: auto;
	width:90%; 
}

html { 
  margin:0;
  padding:0;
  background: url(lycee.jpg) no-repeat center fixed; 
  -webkit-background-size: cover; /* pour anciens Chrome et Safari */
  background-size: cover; /* version standardisée */
}

body
{
   margin: 0;
   font-size: 1.1em;
   
}

#bloc_page
{
	width: 80%;
	margin: 0 auto auto auto;
	background-color: rgba(200,150,140,0.6);
}

header nav
{
	
	font-size : 2em;
    background-color: rgba(155,231,125,0.4);
    text-align: center;
}

header nav ul
{
    list-style-type: none;
    margin: 0px;
}

header nav li
{
    display: inline-block;
    margin-right: 20px;
}

nav a { text-decoration: none; opacity: 1; }
nav a:link { color: black; }	
nav a:visited { color: darkred; }
nav a:hover { color: red; }

article
{
    padding: 10px 10px 10px 10px;
    color : white;
    text-align: justify;
}