#colonne_droite {
  width:400px;
  text-align:justify;
  float:right;
}

#colonne_droite hr {
  border:1px solid #cc0000;
}

.title_colonne {
  background-color:#cc0000;
  color:#ffffff;
  padding:10px;
}
.title_colonne h1 {
  text-align:left;
  font-size:1.1em;
  margin:0px;
}

.bloc {
  padding:0px 10px 10px 10px;
  border:1px solid #cc0000;
}

#colonne_gauche {
  width:500px;
  float:left;
}

#colonne_gauche a img{
  margin:5px;
}