body {
  margin: 0;
  /*font-family: Arial, Helvetica, sans-serif;*/
   font-family: Calibri;
}

.topnav {
  position: relative;
  overflow: hidden;
  background-color: black;
    /*max-width: 904px;*/
    text-align: center;
     font-size: 1.1em;
}

.topnav a {
  float: left;
  color: white;
  text-align: center;
  padding: 25px 16px 25px;
  text-decoration: none;
  
   /*max-width: 904px;*/
}

.topnav a:hover {
  background-color: #4FBDD2;
  color: black;
}

.topnav a.active {
  background-color: #4FBDD2;
  color: white;
}

.topnav-centered a {
    float: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size:1.5em;
}

.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;
  }
}