/* Scoped by data-slide: matches the deck's <section data-slide="closing">
   AND this slide opened on its own (<html data-slide="closing">). An
   unscoped `.inner.centered h1` here collided with appendix's identical
   selector — same specificity, so whichever loaded last won for both slides. */
[data-slide="closing"] h1 { max-width: 22ch; }
