ul {
position: fixed;
top: 0;
width: 100%;
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #333;
}

li {
float: left;
border-right: 2px solid #bbb;
}

li a {
display: block;
color: white;
text-align: center;
padding: 5px 9px;
text-decoration: none;
}

li a:hover:not(.active) {
background-color: #111;
color: white;
}