{{ warnf "Expand shortcode is deprecated. Use 'details' instead." }}
<div class="book-expand">
  <label>
    <div class="book-expand-head flex justify-between">
      <span>{{ default (i18n "Expand") (.Get 0) }}</span>
      <span>{{ default "↕" (.Get 1) }}</span>
    </div>
    <input type="checkbox" class="hidden" />
    <div class="book-expand-content markdown-inner">
      {{ .Inner | markdownify }}
    </div>
  </label>
</div>