a {
    text-decoration: none;
    display: inline-block;
    padding: 8px 16px;
    margin-top: 5px;
    margin-left: 30px;
  }
  
  a:hover {
    background-color: #ddd;
    color: black;
  }
  
  .previous {
    /* background-color: #b1b1b1; */
    color: black;
  }
  
  .round {
    border-radius: 50%;
  }