div.site-logo {
  text-align: center;
}
div.table-main {
  display: table;
  width: 100%;
  text-align: center;
}
div.table-row {
  display: table-row;
}
div.table-cell {
  display: table-cell;
  width: 25%;
  text-align: center;
  vertical-align: middle;
  padding: 10px;
}