.book-menu input.toggle + label::after {
  font-family: "Roboto", system-ui, -apple-system, Segoe UI, Helvetica, Arial, sans-serif;
  font-weight: 700;
  font-variation-settings: normal;
  line-height: 2;
  display: inline-block;
  transform: scaleY(1.5);
  transform-origin: center;
}

/* RTL variant also uses Roboto for the arrow glyph */
body[dir="rtl"] .book-menu input.toggle + label::after {
  font-family: "Roboto", system-ui, -apple-system, Segoe UI, Helvetica, Arial, sans-serif;
}
 
/* Keep the scale when the arrow rotates open */
.book-menu input.toggle:checked + label::after {
  transform: rotate(90deg) scaleY(1.5);
}

/* RTL open state keeps scale with opposite rotation */
body[dir="rtl"] .book-menu input.toggle:checked + label::after {
  transform: rotate(-90deg) scaleY(1.5);
}