section {
	color: whitesmoke;
}

#conteneur
{
	margin: auto;
    max-width: 1000px;
	display: flex;
	flex-wrap: wrap;
	justify-content: space-around;
}

.grp1, .grp2 ,.grp3{
	width: 362px;
	padding: 15px;
}
 #conteneur img {
	 border-radius: 10px;
     box-shadow: 8px 8px 10px black;
 }
 
 img {
	 background-color: white;
 }
 
iframe {
	width: 400px;
	height: 300px; 
	frameborder: 0; 
	border: 0;
}