@media (min-width: 1024px) {
  body {
    width: 900px;
    margin-right: auto;
    margin-left: auto;
  }
}

#body_page {
  width: 900px;
  margin-right: auto;
  margin-left: auto;
  border: none;
  /*margin: 8px auto 15px;*/
  /*overflow: visible ! important;*/
  position: absolute;
  min-width: 15px;
  min-height: 15px;
}

#colonne_gauche {
  border:  none;
  padding: 0px;
  width: 25%;
  float: left;
  position: relative;
}

#colonne_droite {
  border:  none;
  padding: 0px;
  position: relative;
  float: right;
  width: 75%;
}