/* Gesamte Seite */
body {
  margin: 0;
  font-family: sans-serif;
  background: #fdfdfd;
}

/* Top-Bar mit Zurück-Button */
#top-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: #222;
  color: white;
  padding: 12px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  text-align: center;
  transition: opacity 0.3s ease;
  opacity: 1;
}

/* Sichtbarkeit steuern */
#top-bar:not(.visible) {
  opacity: 0;
  pointer-events: none;
}

/* Link im Kasten */
.back-button {
  color: white;
  text-decoration: none;
  font-size: 16px;
}

/* PDF-Container */
.pdf-container {
  padding-top: 60px; /* Platz für den Top-Bar-Kasten */
  width: 100vw;
  height: 100vh;
  box-sizing: border-box;
}

.pdf-container embed {
  width: 100%;
  height: calc(100vh - 60px);
  border: none;
}

/* Mobile Optimierung */
@media (max-width: 600px) {
  .back-button {
    font-size: 14px;
  }

  #top-bar {
    padding: 10px;
  }

  .pdf-container {
    padding-top: 50px;
  }

  .pdf-container embed {
    height: calc(100vh - 50px);
  }
}