nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #000000;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
  }
  
 nav li {
    float: left;
  }
  
nav li a {
    display: block;
    color: rgb(0, 0, 0);
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    cursor: pointer;
  }
  
 nav li a:hover:not(.active) {
    background-color: #111;
  }
  
 nav .active {
    background-color: #fbff00;
  }