body {
  background-image: url('http://dechav.free.fr/_images/fond.jpg');
  font-family: "Verdana", "Times", serif;
  font-size: 0.9em;
  color: DarkBlue;
}

h1 {
  text-align: center;
}

.centre {
  text-align: center;
}

.moyen {
  font-size: 0.8em;
}

.petit {
  font-size: 0.65em;
}