.center {
	display: block;
	margin-left: auto;
	margin-right: auto;
}
body{color:white;
	background: linear-gradient(-90deg, #191b1c, #474949);
	font-family: arial;
}
li,a, button{
	font-weight: 500;
	font-size: 16px;
	color: white;
	text-decoration: none;
	list-style-type: none;
}
button{
	padding: 9px 25px;
	background-color: rgba(0,136,169,1);
	border: none;
	border-radius: 50px;
	cursor:pointer;
	transition: all 0.3s ease 0s;
}
button:hover {
	background-color: rgba(0,136,169,0.8);
}
header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 30px 10%;
}
.signature{
	cursor: pointer;
}
.links{
	list-style: none;
}
.links li{
	display: inline-block;
	padding: 0px 20px;
}
.links li a{
	transition: all 0.3s ease 0s;
}
.links li a:hover{
	color: #0088a9;
}
article{
margin-left:10%;
}