.toptop {
  position: fixed;
  width: 100%;
  z-index: 1200;
}
.topnav {
  overflow: hidden;
  background-color: rgba(253, 251, 251, .85);
  width: 100%;
  z-index: 1200;
}

.topnav a {
  float: left;
  display: block;
  color: #000000;
  text-align: center;
  padding: 8px 8px 2px;
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
}

.active {
  background-color: #4CAF50;
  color: white;
}

.topnav .icon {
  display: none;
}

.dropdown {
  float: left;
  overflow: hidden;
}
.dropdown .dropbtn {
  font-size: 16px;    
  border: none;
  outline: none;
  color: #000000;
  padding: 8px 8px;
  background-color: inherit;
  font-family: inherit;
  font-weight: 700;
  margin: 0;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: rgba(253, 251, 251, .85);
  min-width: 140px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1200;
}

.dropdown-content a {
  float: none;
  color: black;
  padding: 8px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.topnav a:hover, .dropdown:hover .dropbtn {
  background-color: #ddd;
  color: black;
}

.dropdown-content a:hover {
  background-color: #ddd;
  color: black;
}

.dropdown:hover .dropdown-content {
  display: block;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child), .dropdown .dropbtn {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  .topnav.responsive .dropdown {
    float: none;
  }
  .topnav.responsive .dropdown-content {position: relative;}
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
  }
}