*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
ul{
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: rgb(0, 0, 0);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
}

li{
    float: left;
    border-right: 1px solid white;
    cursor: pointer;
}

li:hover{
    background-color: rgba(39, 39, 39);
}

li:last-child{
    border-right: none;
}
li a{
    display: block;
    color: white;
    text-decoration: none;
    padding: 1rem;
    text-align: center;
}