body {
  font-family: system-ui, sans-serif;
  color: #000;
  margin: 2em auto;
  max-width: 1000px;
  line-height: 1.6;
}
th {text-align:left;
	vertical-align:top;
}
h1 {
  font-size: 2em;
  margin-top: 1.5em;
  border-bottom: 2px solid #ccc;
  padding-bottom: 0.2em;
  text-align: center;
}

h2 {
  font-size: 1.5em;
  margin-top: 0.8em;
  color: #444;
}
h3 {
  font-size: 1.2em;
  margin-top: 0.8em;
  color: #444;
}

p {
  margin: 0em 0;
  padding: 0em 0;
}

div {
  margin: 5px 3px 5px 5px;
  padding: 5px 3px 5px 23px;
}
button {
  margin: 0px 0px 0px 0px;
  padding: 0px 15px 0px 15px;
}
.zelle{margin: 0px 5px 0px 5px;}

b {
  font-weight: bold;
  color: #000;
}

figure {
  margin: 1.5em 0;
  text-align: center;
}

figcaption {
  font-size: 0.9em;
}

video {
  display: block;
  margin: 1.5em auto;
}

.math {
  font-family: serif;
  font-size: 1.1em;
}

blockquote {
  margin: 1.5em 0;
  padding: 0.5em 1em;
  font-style: italic;
  color: #555;
}