.vcenter { 
  position: absolute;
  top: 50%;
  font-size: 12px;
  height: 560px; /* 36em */
  margin-top: -280px; /* -18em; */
  text-align: center;
  width: 100%;
  /* border: 1px solid yellow; */
}
table.page { 
  font-size: 12px;  
}