body, html {
  height: 100%;
  margin: 0;
}

.topnav {
    background-color: #333;
    overflow: hidden;
    position: fixed; /* Fix the menu at the top */
    top: 0;
    width: 100%; /* Ensure the menu spans the full width */
    z-index: 1000; /* Ensure the menu is on top of other elements */
}

.topnav a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
}

.topnav a:hover {
    background-color: #88ffed;
    color: black;
}

.topnav a.active {
    background-color: #00aea3;
    color: white;
}

.topnav .icon {
    display: none;
}

/* Media query for screens smaller than 600px */
@media screen and (max-width: 680px) {
  .topnav a {
    display: none;
  }
  .topnav a.icon {
    float: left;
    display: block;
  }
}

@media screen and (max-width: 680px) {
  .topnav.responsive {
    background-color: #333;
    overflow: hidden;
    position: fixed; /* Fix the menu at the top */
    top: 0;
    width: 100%; /* Ensure the menu spans the full width */
    z-index: 1000; /* Ensure the menu is on top of other elements */
  }
  .topnav.responsive .icon {
    position: absolute;
    left: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}