body {
  background-color: white;
  color: blue;
  display: grid;
  grid-template-columns: 25% 75%;
  grid-template-rows: minmax(min-content, 20%) minmax(max-content, 1fr);
}

div#header {
  grid-column: 1 / 3;
  grid-row: 1 / 2;
}

div#navigation {
  grid-column: 1 / 2;
  grid-row: 2 / 3;
  overflow: auto;
  margin-right: 2ex;
}

div#navigation p {
  font-size: 115%;
  font-weight: bold;
  font-style: italic;
}

div#inhalt {
  grid-column: 2 / 3;
  grid-row: 2 / 3;
}

div.seifenblase {
  color: green;
}