.topnav {
  background-color: #99e4ff;
  overflow: hidden;
  width: 100%;
}
.topnav a {
  float: left;
  display: inline-block;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  color: #000000;
  text-align: center;
  padding-left: 12px;
  padding-right: 14px;
  padding-top: 6px;
  padding-bottom:6px;
  text-decoration: none;
  background-color: #99e4ff;
}
.topnav a.active {
   color: #000000;
   background-color: #99e4ff;
}
.topnav a.hover {
  background-color: lime;
  border-bottom: 2px solid #ffffff;
  padding-bottom: 5px;
}
.topnav .icon {
  display: none;
} 

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