.navbar {
overflow: hidden;
background-color: #333;
}

.navbar a {
float: left;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}

.navbar a:hover {
background-color:#ddd;
color: black;
}


.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}