.grTitre {
	color:red;
	text-align: center;
	margin-top: 50px;
	margin-bottom: 50px;
}
body {
	background-image:url(imagecss/virus-d-886933.jpg);
	background-attachment: fixed;
}
div {
	background-color:rgba(149, 182 ,214 ,0.6 );
	border-radius: 10px;
	box-shadow: 6px 6px 35px teal;
	text-shadow: 2px 2px 4px yellow;
	color:white;
	text-align:justify;
	margin-left:15%;
	margin-right:15%;
	padding-left:35px;
	padding-right:35px;
}
a:hover {
	color:red;
}
a {
	font-size: 22px;
}
footer {
	background-color:rgba(149, 182 ,214, 0.6);
	border-radius: 10px;
	box-shadow: 6px 6px 35px teal;
	text-shadow: 2px 2px 4px yellow;
	color:white;
	text-align:center;
}
h1 {
	text-align:center;
}
h2 {
	font-size: 40px;
}
h3 {
	font-size: 30px;
}
p {
	font-size:22px;
}