{{- /*
  callout shortcode — wraps content in an ASW callout block.
  
  Usage:
    {{< callout note >}}
    Content here. Markdown is rendered.
    {{< /callout >}}
  
  First positional param: callout type.
  Valid types: note, warning, tip, info (maps to ASW data-callout attribute).
  Default: note
*/ -}}
{{- $type := .Get 0 | default "note" -}}
<aside data-callout="{{ $type }}">
  {{ .Inner | markdownify }}
</aside>