{{- $ratio := (split (.Get "ratio") ":") -}}
{{- $enlarge := .Get "enlarge" -}}
{{- $footnoteAbove := .Get "footnote-above" -}}
{{- $columnsClass := "book-columns flex flex-wrap" -}}
{{- if $enlarge -}}
  {{- $columnsClass = printf "%s enlarge-%s" $columnsClass $enlarge -}}
{{- end -}}
{{- if $footnoteAbove -}}
  {{- $columnsClass = printf "%s footnote-above" $columnsClass -}}
{{- end -}}
<div class="{{ $columnsClass }}{{ with .Get "class" }} {{ . }}{{ end }}">
{{ range $index, $content := split .InnerDeindent "<--->" }}
  {{- $grow := default 1 (index $ratio $index) -}}
  <div class="flex-even markdown-inner" style="flex-grow: {{ $grow }};">
    {{ $content | safeHTML }}
  </div>
{{ end }}
</div>