.boite1{width: 800px;height: 150px; background-color: #093844;margin-bottom: 15px;margin-left: auto; margin-right: auto}
.boite2{width:830px;margin-left: auto;margin-right: auto;display:flex;}
.boite3{width:700px;height:100px;background:#532736;margin:auto}
.big-boite{width:830px;margin-left: auto;margin-right: auto;}
.menu{width: 830px;display: flex;margin-left: auto;margin-right: auto;}