.topnav {
  background-color: #1e74ff;
  overflow: hidden;
    position: fixed;
    z-index: 100;
    width: 100%;
    
}

/* Style the links inside the navigation bar */
.topnav a {
    font-family: 'Roboto', sans-serif;
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
    z-index: 102;
    position: relative;
}


/* Change the color of links on hover */
.topnav a:hover {
  background-color: #ddd;
  color: black;
}
.topnav a:last-child:hover {
  background-color:#333;
  color: black;
}

/* Add an active class to highlight the current page */
.active {
  background-color: #4CAF50;
  color: white;
}

/* Hide the link that should open and close the topnav on small screens */
.topnav .icon {
  display: none;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
    
.topnav.responsive {position: fixed;}
  .topnav.responsive a.icon {
    position: fixed;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}