div.documentheader-a { background-color: transparent; }
div.documentheader-b { padding-top: 10vh; padding-bottom: 10vh; text-align: right }
div.documentheader-c
{
  margin-left: 50%; margin-right: 10%; padding: 3ex; padding-left: 2em; padding-right: 2em;
  background-color: #fffa; text-align: left;
}
@media only screen and (max-width: 850px)
{
  div.documentheader-c { margin-left: 1em; margin-right: 1em }
}