body {
  background: #123;
}

img.logo {
  float: left;
  border: medium solid black;
}

div.content {
  margin-left: 10%;
  margin-right: 10%;
  border: thick solid black;
  padding: 3em;
  padding-top: 1em;
  background-color: #333;
  color: #cca;
}

a {
  color: #79a;
  text-decoration: none;
  font-weight: bold;
  font-variant: small-caps;
}

a:hover {
  color: white;
}

table {
  width: 630px;
  margin: 5em;
  margin-left: auto;
  margin-right: auto;
}

td {
  width: 210px;
  margin: 0;
  border: 0;
  padding: 0;
}

table a {
  display: block;
  margin: 3px;
  border: thin solid #cca;
  padding: 0.5em;
  padding-top: 1em;
  padding-bottom: 1em;
  background: #123;
  color: #cca;
  text-align: center;
}

table a:hover {
  background: black;
  color: #cca;
}

pre code {
  display: block;
  border: thin solid #cca;
  padding: 1em;
  background-color: black;
}