.tableauprincipale{
border: solid #ff9000 1pt;
border-top-style: none;
}
.encadre2{
border-top: 1px;
border-top-color: red;
border-top-style: dotted;
border-bottom: 1px;
border-bottom-color: red;
border-bottom-style: dotted;
}
.cellule3{
border-bottom: 1px;
border-bottom-color: red;
border-bottom-style: dotted;
}
.tableau2{
border: solid white 1pt;
border-right-style: none;
border-left-style: none;
}