td{
text-align: center;
	border: groove;
	width: 70px;
	font-size: 17px;
}

th{
text-align: center;
	border-left: groove;
	width: 70px;
	background-color:#616161;
	color: white;
	font-weight: normal;
	font-size: 20px;
}


table tr:nth-child(odd){
  background-color:#D3E0FF;
}
table{
	border-collapse: collapse;
	padding: 5px;
	border-color: #FF1B22;
	border: medium solid black;

}

.forme{
	width :800px;
max-width:100%;
height: auto;
}

p {
	margin: 2px;
	
}
#Retour{
	font-size: 15px;
	text-align: center;
	padding: 5px;
	
}

table tr:hover
{
	font-weight: bolder;
}
.fraction {
    display: inline-block;
    vertical-align: middle; 
    margin: 0 0.2em 0.4ex;
    text-align: center;
}
.fraction > span {
    display: block;
    padding-top: 0.15em;
}
.fraction span.fdn {border-top: thin solid black;}
.fraction span.bar {display: none;}