.topnav {
  overflow: hidden;
<!--- background-color: white;--->
}

.topnav a {
  float: left;
  display: block;
  color: blue;
  text-align: center;
  padding: 0.25vw;
  text-decoration: none;
  font-size: 15px;
  background-color:#BDD2FF
}

.active {
  background-color: #04AA6D;
  color: white;
  font-size:15px 
}
.single { 
  background-color: blue;
  
}

.topnav .icon {
  display: none;
  color:black;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 15px;    
  border: none;
  outline: none;
  color: blue;
  padding: 0.25vw;
  background-color: #BDD2FF;
  font-family: inherit;
  margin: 0;
}


.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.topnav a:hover, .dropdown:hover .dropbtn {
  background-color: #555;
  color: white;
}

.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;
  }
}