{{ define "main" -}}
<h1>404: Page not found</h1>
<p class="lead">
    Sorry, that page is not available. 
</p>
<p class="lead">
    I have recently re-organized this site, so some bookmarks might no longer work.
    But all the old content is still there (plus a lot of new material). 
    Please check the main menu and you should find what you are looking for.
</p>
{{- end }}