/*code du header*/

header {
    margin: auto;
    height: 150px;
    background-color: black;
    ;}

.ruban {
    position: relative;
    top: 90px;
    margin: auto;
    width: 600px;   
}


.ruban a:link, .ribbon a:visited { 
  color:#FFFFFF;
  text-decoration:none;
  margin:0;
  float:left;
}

.ruban span {
  background:#991111;
  display:inline-block;
  line-height:3em;
  padding:0 3em;
  margin-top:0.5em;
  transition: background-color 0.5s, margin-top 0.5s;
}

.ruban a:hover span {
  background:#EE2222;
  margin-top:0;
}

/*code principal*/

#gauche {
    background-color:grey;
    margin-right: 410px;
    hyphens: auto;
    text-align: justified;
}

#droit {
    position: relative;
    width: 400px;
    float: right;
    bottom: 697px;
}

#droithaut {
    width: 400px;
    background-color: blue;
}

#droitbas {
    
    width: 400px;
    background-color: red;
}

footer {
    background-color: grenn;
    height: 80 px;
}

footer a {
    text-align: center;
}
