body, html {
  height: 100%;
  width: 100%;
  border: 0;
  margin: 0;
  padding: 0;
  background-color: #D4F297;
}

#centp {
  position: absolute;
  top: 50%;
  left: 50%;
  border-width: 0;
  margin-width: 0;
  padding-width: 0;
  font-size: 1.3em;
}