.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg) repeat;
  text-align: center;
}

.site-header img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.inhaltsverzeichnis {
  font-size: 26px;
  font-weight: bold;
  margin: 8px 0;
}