ul {
  list-style-type:none;
  margin: 0 auto;
  text-align:center;
  display: table;
  padding: 0;
  overflow: hidden;
  background-color: #000;
  font-family: Arial;
  font-size: 0.833vw;
  color: white;
}

li {
  display:inline;
  border-right:1px solid #bbb;
    border-bottom: 3px solid black;
}

li:last-child {
  border-right: none;
    border-bottom: 3px solid black;
}

li a {
  display:inline-block;
  text-align:center;
  padding: 14px 16px;
  text-decoration: none;
  border-bottom: 3px solid black;
  color: white;
}

li a:hover:not(.active) {
  border-bottom: 3px solid yellow;
    color: white;
}

.active {
  border-bottom: 3px solid yellow;
    color: white;
}