body {
  max-width:50rem;
  margin-left: auto;
  margin-right: auto;
  font-family: sans-serif;
}
/* avoid left-jump of page content when vertical scrollbar appears:
 *  * always show vertical scroll bar 
 * Thanks to stefanchrist.eu */
body { overflow-y: scroll; }
h1 {
  text-align: center;
}
h1 a {
  text-decoration: none;
  color: black;
}
table {
  border-collapse: collapse;
}
th {
  text-align: left;
  border-bottom-style: solid;
  border-bottom-width: 1pt;
  border-bottom-color: black;
  border-top-style: solid;
  border-top-width: 2pt;
  border-top-color: black;
}
.prettytable td {
  padding: 0.4rem 1rem 0.4rem 0;
}
.prettytable thead{
  background: #009970;
  color: white;
}
.prettytable tbody tr:nth-child(odd){
  background: #ffccda;
}
.prettytable tbody tr:last-child td {
  border-bottom-style: solid;
  border-width: 2pt;
}
.infotable td {
  padding: 0 1rem 0 0;
  border-bottom-style: none;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}
#hypplane img {
  float: right;
  max-height: 10rem;
  width: auto;
}
#portrait img{
  max-width: 100%;
  height: auto;
  padding-top: 0.5rem;
}
p a {
  text-decoration: none;
  color: black;
  font-weight: normal;
}
a {
  text-decoration: none;
  font-weight: bold;
  color: #009970;
}

.address a {
  text-decoration: none;
  color: black;
  font-weight: bold;
}
#toc ol li {
  display: inline;
  padding: 0 2rem;
  font-family: sans-serif;
  font-weight: bold;
  border-right-width: 1px;
  border-right-color: white;
  border-right-style: solid;
}
#toc .last {
  border-right-width: 0;
  border-right-style: none;
}
#toc {
  padding-bottom: 0.5rem;
}
#toc ol {
  padding: 0.25rem 0;
  background: #009970;
}
#toc a {
  text-decoration: none;
  color: white;
}
#toc {
  text-align: center;
  height: 1.5rem;
}