.topnav {
  position: relative;
  overflow: hidden;
  background-color: #333;
  border-radius: 15px;
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.75);
  padding: 5px;
  z-index: 99999999;
  font-family: "Lato", sans-serif;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 12px;
}

.topnav a:hover {
  border-radius: 15px;   
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  border-radius: 15px;  
  background-color: #F6670E;
  color: white;
}

.topnav-centered a {
  float: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.topnav-right {
  float: right;
}

/* Responsive navigation menu (for mobile devices) */
@media screen and (max-width: 600px) {
  .topnav a, .topnav-right {
    float: none;
    display: block;
  }
  
  .topnav-centered a {
    position: relative;
    top: 0;
    left: 0;
    transform: none;
  }
}