html {
	background-color:black;
	height: 100%;
	padding: 0px;
	margin: 0px;
}
body {
	height: 100%;
	min-height: 100%;
	padding: 0px;
	margin: 0px;
}
div , button{
	margin: 0px;
	padding: 0px;
}
.dropdown {
	width:100%;
}
.boutonmenuprincipal {
	width: 100%;
	height: 100%;
	background-color: #e83737;
	color: white;
	border: none;
	cursor: pointer;
	padding:20px;
	font-size: 30px;
}
.boutonmenuprincipal:hover {
	background-color: #ff4444;
}
.dropdown {
	position: relative;
	display: inline-block;
}
.dropdown-child {
	display: none;
	background-color: #f28c8c;
	min-width: 50px;
}
.dropdown-child a {
	color: white;
	height: 20%;
	padding: 20px;
	text-decoration: none;
	display: block;
}
.dropdown:hover .dropdown-child {
	display: block;
}