.footer {
    overflow: hidden;
    background-color: #333;
    margin-top: 25px;
}

.footer a {
    color: #f2f2f2;
    text-align: center;
    text-decoration: none;
    font-size: 17px;
    margin-left: auto;
    margin-right: auto;
    width: 40%;
    text-align: center;
    display: block;
  }

/* Style the search box inside the navigation bar */
.footer input[type=text] {
    padding: 6px;
    border: 3px solid black;
    margin-left: auto;
    margin-right: auto;
    font-size: 17px;
    width: 40%;
    display: block;
}

/* When the screen is less than 600px wide, stack the links and the search field vertically instead of horizontally */
@media screen and (max-width: 600px) {
    .footer a, .footer input[type=text] {
      float: none;
      display: block;
      text-align: left;
      width: 100%;
      margin: 0;
      padding: 14px;
    }
    .footer input[type=text] {
      border: 1px solid #ccc;
    }
  }