{{ if .Parent }}
  {{- $group := printf "grid-%s" (.Parent.Get 0) }}
  {{- $class := default "" (.Get "class") }}
  {{- $size := default "regular" (.Get "size" | lower) }}
  {{- $icon := default "" (.Get "icon") }}
  {{- $title := default "" (.Get "title") }}

  {{- if not (in (slice "regular" "large") $size) }}
    {{- $size = "regular" }}
  {{- end }}

  {{ if not (.Parent.Scratch.Get $group) }}
    {{ .Parent.Scratch.Set $group slice }}
  {{ end }}

  {{ .Parent.Scratch.Add $group (dict "Class" $class "Size" $size "Icon" $icon "Title" $title "Content" .Inner) }}
{{ else }}
  {{ errorf "%q: 'box' shortcode must be inside 'boxes' shortcode" .Page.Path }}
{{ end }}