body
{
text-align: center;
width: 90%;
margin: auto;
margin-top: 20px;
margin-bottom: 20px;
}

#menu
{
float: center;
width: 80%;
margin: auto;
margin-top: 0%;
}

table
{
margin : auto;
width: 70%;
}



#corps
{
margin-left: 240px;
margin-bottom: 20px;
padding: 5px;
}

a
{
text-decoration:none;  
}



#back
{
width: 90%;
margin-top: 15%;
margin: auto; 
height: 10%;
text-align: center;
}