/* Offline PDF download, styled to match the existing navigation. */
.toolbar .pdf-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 9px 15px;
  background: white;
  color: var(--ink);
  font: 600 14px var(--body);
  text-decoration: none;
}
@media (max-width: 650px) {
  .toolbar .pdf-download { font-size: 13px; padding: 9px 11px; }
}
/* Full offline backup: one landscape slide per page, including Q&A. */
@media print {
  .cover-student, .cover-student[hidden] { display: grid !important; }
  .slide[data-appendix=true] { display: flex !important; }
  .sr-only { display: none !important; }
}