How to add CSS from a Theme Component?

[iaeiou]

@iaeiou

A second drawback of the actual implementation is that the CSS is injected each time the Shortcode is used. (if the Shortcode is called 5 times on the same page, the CSS is injected 5 times too!).
Any hint to improve that?

This should be avoid with this method :

{{- if not ($.Page.Scratch.Get "noticecount") -}}
    <style type="text/css">.notice{padding:18px;}</style>
{{- end -}}
{{- $.Page.Scratch.Add "noticecount" 1 -}}