@media print {
  /* Keep PDF output clean and predictable. */
  .reveal {
    font-size: 26px;
  }

  /* Avoid clipped code blocks and reduce visual noise. */
  pre code {
    max-height: none !important;
    overflow: visible !important;
  }

  /* Hide UI affordances that sometimes leak into print in some browsers. */
  .reveal .controls,
  .reveal .progress {
    display: none !important;
  }
}