#content.source {
  white-space: pre;
}

#content {
  position: relative;
  max-width: 210mm;
  min-height: 297mm;
  padding: 10mm;
  border: thin solid black;
}

a {
  font-weight: bold;
  color: forestgreen;
  text-decoration-color: darkred;
}

@scope (.markdown) {
  h1::before {
    color: gray;
    content: '# ';
  }
  h2::before {
    color: gray;
    content: '## ';
  }
  h3::before {
    color: gray;
    content: '### ';
  }
  h4::before {
    color: gray;
    content: '#### ';
  }
}