body {
  font-family: Arial, Helvetica, sans-serif;
  max-width: 860px;
  margin: 0 auto;
  padding: 1.5em 2em;
  background: #fafaf8;
  color: #222;
}

a, a:visited {
  color: #555;
}

a:hover {
  text-decoration: underline;
  color: #028fa9;
}

h1 {
  border-bottom: 3px solid #1a5276;
  padding-bottom: 0.3em;
}

h2 {
  margin-top: 2em;
  color: #333;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5em;
}

th {
  background: #444;
  color: #fff;
  text-align: left;
  padding: 0.4em 0.8em;
}

td {
  padding: 0.35em 0.8em;
  border-bottom: 1px solid #ddd;
}

code, pre {
  background: #f4f4f0;
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-size: 1.1em;
  line-height: 1.5em;
}

pre {
  padding: 1em;
  overflow-x: auto;
}

footer {
  display: block;
  margin-top: 1em;
  padding-bottom: 2em;
}

.nav {
  margin-bottom: 1.5em;
  font-size: 0.9em;
}

.nav a, footer a,
.nav a:visited, footer a:visited {
  color: #1a5276;
}

.nav a:hover, footer a:hover {
  color: #028fa9;
}

.aufgabe {
  background: #fff;
  border: 1px solid #ddd;
  border-left: 5px solid #1a5276;
  padding: 1em 1.5em;
  margin: 1.5em 0;
}

.hinweis {
  background: #fdf6e3;
  border: 1px solid #f0c040;
  border-left: 5px solid #f0c040;
  padding: 0.8em 1.2em;
  margin: 1em 0;
}

.lernziel {
  background: #eaf4fb;
  border: 1px solid #aed6f1;
  border-left: 5px solid #2980b9;
  padding: 0.8em 1.2em;
  margin: 1em 0;
}

.achtung {
  background: #fdedec;
  border: 1px solid #f1948a;
  border-left: 5px solid #e61b03;
  padding: 0.8em 1.2em;
  margin: 1em 0;
}

.warnung {
  background: #fef3e2;
  border: 1px solid #e8a838;
  border-left: 5px solid #ed9502;
  padding: 0.8em 1.2em;
  margin: 1em 0;
}

.referenz {
  font-size: 0.9em;
  color: #555;
}

table.shortcuts {
  border-collapse: collapse;
  width: 100%;
  margin-top: 1em;
}

table.shortcuts th, table.shortcuts td {
  fonts-size: .9em;
  color: #000;
  padding: .2em .3em;
  border: 1px solid #999;
  background: rgba(255, 255, 255, .75);
}

table.shortcuts td {
  font-family: monospace;
  font-weight: bold;
}

table.shortcuts td:first-child,
table.shortcuts td small {
  font-family: Arial, Helvetica, sans-serif;
  font-weight: normal;
}

table.shortcuts td small {
  display: block;
  margin-top: .3em;
  margin-bottom: .3em;
}