body {
  background-color: white;
  color: black;
}
table {
  border-collapse: collapse;
}
pre {
  padding: 1em;
  border-style: ridge;
  background: #EEEEEE;
}
h1 {
  padding: 0.1em 0.5em;
  border-style: solid;
  border-top-width: 0.1em;
  border-bottom-width: 0.1em;
  border-right-width: 2em;
  border-left-width: 2em;
}
h2 {
  padding: 0.1em 0.5em;
  border-style: solid;
  border-color: gray;
  border-top-width: 0.1em;
  border-bottom-width: 0.1em;
  border-right-width: 1em;
  border-left-width: 1em;
}