body {
 
  
  background-image: url("starfield.jpg");
  font-family: "Open Sans", sans-serif;
  padding: 5px 25px;
  font-size: 18px;
  margin: 0;
  color: #444;
}

h1 {
  
  font-family: verdana;
  font-size: 32px;
  color: white;

}

p {
	color: grey;
}

h2 {
  text-align: center;
  font-family: a;
  font-size: 18px;
  text-align: align-center;
}

h3 {
  text-align: left;
  color: white;
  font-family: verdana;
  font-size: 30px;
  
}
div#titre{
  float:left;
  margin-bottom: auto;
  width:500px;
}
div#contenu1 {
  float:left;
  width:300px;
  height:100px;
  background-color:gainsboro;
  border: 1px solid black;
  border-color: black;
 
}

div#contenu2 {
  
  float:left;
  width:300px;
  height:100px;
  background-color:gainsboro;
  border: 1px solid black;
}

div#contenu3 { 
  
  float:left;
  width:300px;
  height:100px;
  background-color:gainsboro;
  border: 1px solid black;
}

div#container {
  
  width:1200px;
  height:100px;
  margin-top: 0px;
}

div#contenu4 {
  float:left;
  width:300px;
  height:200px;
  background-color:gainsboro;
  border: 1px solid black;
  border-color: black;
}

div#contenu5 {

  float:left;
  width:300px;
  height:200px;
  background-color:gainsboro;
  border: 1px solid black;
}

div#contenu6 { 

  float:left;
  width:300px;
  height:200px;
  background-color:gainsboro;
  border: 1px solid black;
}
div#imagier{
  margin-left: 600px;
  width:1200px;
  height:100px;
}
img.center
{
  display: block;
  margin-left: 0px;
  margin-right: auto 
}

div#intervalle { 

  float:left;
  width: 900px;
  height: 200px;
  background-color:gainsboro;
  border: 1px solid black;
}

div#partition { 

  float:left;
  width:673;
  height:90;
  background-color:gainsboro;
  border: 1px solid black;
}


#info-holder {
  width: 300px;
  height: 300px;   /* augmente la taille visible */
  background: #111;
  color: #fff;
  padding: 10px;
  font-family: monospace;
  font-size: 14px;
  overflow-y: auto; /* indispensable si le contenu dépasse */
}