.exocadre{
	background-color:#cccccc;
	border:2px solid;
	background-image: url("../img/einstein.png");
	background-repeat:no-repeat
	
	}
	
.exotitre{
	margin-left:100px;
	padding:4px;
	height:50px;
	font-weight:bold;
	font-size:24px;
	color:red;
	line-height: 50px;
	vertical-align: middle;
	}
	
.exocadrein{
	margin-left:100px;
	
	background-color:white;
	padding:10px;
	}

.numerotation{
	color:red;
	font-weight: bold;
	}
	
.logo-correction{
	float:right;
	max-height:40px
	}
	
.modal-content{
  margin-top:80px;
  }
 
  /* les fractions */
.fraction {
  display: inline-block;
  position: relative;
  vertical-align: middle; 
  letter-spacing: 0.001em;
  text-align: center;
  font-size: 18px;
  }
.fraction > span { 
  display: block; 
  padding: 0.1em; 
  }
.fraction span.fdn {border-top: thin solid black;}
.fraction span.bar {display: none;}