Predefinição:Wikipédia/Tutorial/style.css

.menu {
	list-style:none; 
	border:1px solid #c0c0c0; 
	float:left;
}
.menu li {
	white-space: nowrap;
	background: #575859;
	border: 1px solid #464748;
	border-radius: 1px;
	padding: 3px 3px;
	display: inline-block;
	margin: 3px;
	cursor: pointer;
	font-size: 100%;
	line-height: 1.42857143em;
	color: #FFFFFF;
	opacity: 1;
	font-weight: bold;
}
.menu li a:hover {
	background: #7B7B7D;
	border: 1px solid #464748;
    color: #FFFFFF;
    opacity: 1;
    border-radius: 1px;
	padding: 3px 3px;
	display: inline-block;
    transition: 0.3s;
}