#topnav {
  margin: 0 auto !important;
  display: table;
}

#topnav > table{
  max-width: 1200px;
  height: 25px;
  padding: 0px;
  border-collapse: collapse;
  margin: 0 auto;
}

#topnav > table td{
  text-align: center;
  padding: 0px;
  border-spacing: 0px;
}