.conteneur{width: 830;margin:auto}

.header{width:800px;height:150px;background:#093844;margin:auto;}


.conteneur2{width:800px;height:150px;background:#093844; margin:auto}


menu{width:166px;height:39px;background:#f9f89b;float:left;margin:15px 0px 15px 0px;}

.conteneur2{display:flex;width:880px;}

.colonne_gauche{width:550px;height:500px;background:#80a894;margin-right:30px;}


.colonne_droite{width:250px;height:500px;background:#52736b;}

.footer{width:700px;height:100px;background:#532736;margin:15px auto 0px auto;}