nav table {
   border-spacing:2px;
   margin:auto;
   min-width:50%;		   
}		   
	
nav td {
  border:1xp solid black;
  background-color:steelblue;
  color:white;
  font-size:1.2rem;
  padding:12px;
  text-align:center;
}

nav a {
	color:white;
	text-decoration:none;	
}

.aktiv {
	background:darkgreen;
}

nav table td:hover, nav table td:focus { background: #b3defd;}