.menu {
    background-color: orange;
}
.menu ul { 
    display: flex;
    justify-content: center;
    list-style-type: none;
    padding-left: 0;
}

.menu li {
    border-right: solid 1px white;
}

.menu li:first-child{
    border-left: solid 1px white;
}

.menu a{
    font-family: arial;
    font-weight: bold;
    color: white;
    text-decoration: none;
    text-transform: uppercase;
    padding: 1rem 2rem;
    display: block;
}

.menu a:hover{
   background: rgba(0,0,0,.1);
}