#bloc_transparent{
				background: white;
				width: 80%;
				margin: auto;
				margin-top: 40px;
				margin-bottom: 40px;
				text-align: center;
				}

/* .nav { */
/*  /* Couleur de fond de la barre de navigation */ */
/*   background-color: #DCDBD1; */
/*   border-color: #DCDBD1; */
/* } */

/* /* Couleur des titres affichés dans la barre */ */
/* .nav .nav-brand { */
/*  color: black; */
/* } */

 		
 		div.a {
  width: 450px;
  height:600px;
  background-color: yellow;
  -ms-transform: rotate(90deg); /* IE 9 */
  -webkit-transform: rotate(90deg); /* Safari 3-8 */
  transform: rotate(90deg);
}

/* 	style="width:450px;height:600px;" */

		.navbar-brand {
		  display: inline-block;
		  padding-top: 0rem;
		  padding-bottom: 0rem;
		  margin-right: 0rem;
		  font-size: 1rem;
		  line-height: inherit;
		  white-space: nowrap;
		  background-color: #DCDBD1;
  		  color: #495057;
  		  width:20px;
		}

		.nav {
		  border-bottom: 1px solid #dee2e6;
		  background-color: #DCDBD1;
		  color: #6c757d;
		}

		.nav-item {
		  margin-bottom: -1px;
		  background-color: #DCDBD1;
		  color: #495057;
		}
		
		.nav-link {
		  border: 1px solid transparent;
		  border-top-left-radius: 0.25rem;
		  border-top-right-radius: 0.25rem;
		  color: #495057;
		}
		
		.nav-link:hover, .nav-tabs .nav-link:focus {
		  border-color: #e9ecef #e9ecef #dee2e6;
		  background-color: #f2f2ee;
		   color: #495057;
		}
		
		.nav-link.disabled {
		  color: #6c757d;
		  background-color: transparent;
		  border-color: transparent;
		   color: #495057;
		}
		
		.nav-link.active,
		.nav-item.show .nav-link {
		   color: #495057;
		  background-color: #f2f2ee;
		  border-color: #dee2e6 #dee2e6 #fff;
		}
		
		.nav-link.active {
		  color: #495057;
		  background-color: #f2f2ee;
		}

		.dropdown-menu {
		  margin-top: -1px;
		  border-top-left-radius: 0;
		  border-top-right-radius: 0;
		  color: #495057;
		  background-color: #DCDBD1;
		}
		
		.dropdown-item:hover, .dropdown-item:focus {
		  color: #495057;
		  text-decoration: none;
		  background-color: #f2f2ee;
		}
		
		.bg-light {
		  background-color: #DCDBD1;
		  color: #495057;
		  background-color: #DCDBD1;
		}

		.navbar-collapse {
		  -ms-flex-preferred-size: 100%;
		  flex-basis: 100%;
		  -ms-flex-positive: 1;
		  flex-grow: 1;
		  -ms-flex-align: center;
		  align-items: center;
		  background-color: #DCDBD1;
		  color: #495057;
		}