nav ul {
  background-color: #ddd;
  border: 1px solid #999;
  border-radius: 0.5rem;
  list-style-type: none;
  margin: 0;
  overflow: hidden;
  padding: 0;
}

nav li {
  float: left;
}

nav li a {
  color: black;
  display: block;
  padding: 16px;
  text-align: center;
  text-decoration: none;
}

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

nav .active {
  background-color: #cbb1ff;
}