Upgrade to Hugo 0.16x and zen theme v7.1.0

- Bump themes/zen from v5.7.0 to v7.1.0 (vanilla CSS, no libsass).
- Move layouts to Hugo's new template structure (_default -> root,
  index.html -> home.html, shortcodes -> _shortcodes).
- Replace deprecated language API in templates (Locale, Direction, Name)
  and sync base templates and mobile menu with theme v7.
- Config: languageName/languageCode -> label/locale; move copyright to
  the top-level key the v7 footer reads.
- Port _custom.scss to assets/css/_custom.css and map page/body
  backgrounds to v7's --color-body-bg/--color-page-bg.
- CI: build with hugomods/hugo:0.165.0.

layouts/_partials/mobilemenu.html

@@ -8,7 +8,7 @@
       <rect width="80" height="12" x="10" y="70" rx="5"></rect>
     </svg>
   </button>
-  <div class="mobile-nav__sheet link-inverted link-nav" id="sheet" aria-hidden="true">
+  <div class="mobile-nav__sheet link-nav" id="sheet" data-theme="dark" aria-hidden="true">
     <div class="mobile-nav__region">{{ if hugo.IsMultilingual }}{{ partial "language-selector.html" . }}{{ end }}</div>
     <nav class="mobile-nav__main-menu" aria-label="{{ i18n "menu_title" }}">
     <ul class="mobile-nav__navbar">

layouts/_shortcodes/lang.html

@@ -6,11 +6,11 @@
   {{- $label := cond (eq $code "de") "DE" (cond (eq $code "en") "EN" (cond (eq $code "deen") "DE/EN" "")) -}}
   {{- $title := "" -}}
   {{- if eq $code "deen" -}}
-      {{- $title = cond (eq .Site.Language.Lang "de") "Diese Tour wird zweisprachig stattfinden (Deutsch und Englisch)" "This tour will be bilingual (German and English)" -}}
+      {{- $title = cond (eq .Site.Language.Name "de") "Diese Tour wird zweisprachig stattfinden (Deutsch und Englisch)" "This tour will be bilingual (German and English)" -}}
   {{- else if eq $code "de" -}}
-      {{- $title = cond (eq .Site.Language.Lang "de") "Diese Tour wird auf Deutsch stattfinden" "This tour will be held in German" -}}
+      {{- $title = cond (eq .Site.Language.Name "de") "Diese Tour wird auf Deutsch stattfinden" "This tour will be held in German" -}}
   {{- else if eq $code "en" -}}
-      {{- $title = cond (eq .Site.Language.Lang "de") "Diese Tour wird auf Englisch stattfinden" "This tour will be held in English" -}}
+      {{- $title = cond (eq .Site.Language.Name "de") "Diese Tour wird auf Englisch stattfinden" "This tour will be held in English" -}}
   {{- end -}}
   <abbr style="font-size: .65em; vertical-align: super;" title="{{ $title }}">{{ $label }}</abbr>
 {{- end -}}

layouts/baseof.html

@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html class="nojs" lang="{{ site.LanguageCode | default site.Language.Lang }}" dir="{{ site.Language.LanguageDirection | default "ltr" }}">
+<html class="nojs" lang="{{ site.Language.Locale | default site.Language.Name }}" dir="{{ site.Language.Direction | default "ltr" }}"{{ with $.Param "colorScheme" }} data-theme="{{ . }}"{{ end }}>
 <head>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width">
@@ -15,7 +15,7 @@
 {{ block "head" . }}{{ end }}
 </head>
 
-<body class="{{ if .IsPage }}single-page{{ else }}list-page{{ end }}{{ if .IsHome }} front{{ end }}{{ with $.Param "bodyclass" }} {{ . }}{{ end }}">
+<body class="{{ if .IsPage }}single-page{{ else }}list-page{{ end }}{{ if .IsHome }} front{{ end }}{{ with .Section }} section-page--{{ . | urlize }}{{ end }}{{ with $.Param "bodyclass" }} {{ . }}{{ end }}">
 <div class="page layout__page{{ if $.Param "sidebar" }} layout__sidebar-second{{ end }}">
 <header class="header layout__header">
 {{ if $.Param "logo" | default true -}}
@@ -41,14 +41,7 @@
 {{ if $.Param "sidebar" }}{{ partial "sidebar.html" . }}{{ end -}}
 
 <footer class="footer layout__footer mt--l">
-{{ if templates.Exists "partials/footer.html" -}}
 {{ partial "footer.html" . }}
-{{ else -}}
-{{ if $.Param "feedlinks" }}{{ partial "feedlinks.html" . }}{{ end -}}
-<p>{{ with $.Param "copyright" }}{{ . | markdownify }}{{ else }}<span>© {{ site.Title }}</span>{{ end }}</p>
-{{ with $.Param "footer" }}<p>{{ . | markdownify }}</p>{{ end }}
-{{ if $.Param "poweredby" }}<p>Powered by <a href="https://gohugo.io/">Hugo</a> and the <a href="https://github.com/frjo/hugo-theme-zen">Zen theme</a>.</p>{{ end }}
-{{ end -}}
 </footer>
 
 {{ if $.Param "cookieconsent" }}{{ partialCached "cookieconsent.html" . }}{{ end -}}

layouts/home-baseof.html

@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html class="nojs" lang="{{ site.LanguageCode | default site.Language.Lang }}" dir="{{ site.Language.LanguageDirection | default "ltr" }}">
+<html class="nojs" lang="{{ site.Language.Locale | default site.Language.Name }}" dir="{{ site.Language.Direction | default "ltr" }}"{{ with $.Param "colorScheme" }} data-theme="{{ . }}"{{ end }}>
 <head>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width">
@@ -15,7 +15,7 @@
 {{ block "head" . }}{{ end }}
 </head>
 
-<body class="{{ if .IsPage }}single-page{{ else }}list-page{{ end }}{{ if .IsHome }} front{{ end }}{{ with $.Param "bodyclass" }} {{ . }}{{ end }}">
+<body class="{{ if .IsPage }}single-page{{ else }}list-page{{ end }}{{ if .IsHome }} front{{ end }}{{ with .Section }} section-page--{{ . | urlize }}{{ end }}{{ with $.Param "bodyclass" }} {{ . }}{{ end }}">
 <div class="page layout__page{{ if $.Param "sidebar" }} layout__sidebar-second{{ end }}">
 <header class="header layout__header">
 {{ if $.Param "logo" | default true -}}
@@ -43,14 +43,7 @@
 {{ if $.Param "sidebar" }}{{ partial "sidebar.html" . }}{{ end -}}
 
 <footer class="footer layout__footer mt--l">
-{{ if templates.Exists "partials/footer.html" -}}
 {{ partial "footer.html" . }}
-{{ else -}}
-{{ if $.Param "feedlinks" }}{{ partial "feedlinks.html" . }}{{ end -}}
-<p>{{ with $.Param "copyright" }}{{ . | markdownify }}{{ else }}<span>© {{ site.Title }}</span>{{ end }}</p>
-{{ with $.Param "footer" }}<p>{{ . | markdownify }}</p>{{ end }}
-{{ if $.Param "poweredby" }}<p>Powered by <a href="https://gohugo.io/">Hugo</a> and the <a href="https://github.com/frjo/hugo-theme-zen">Zen theme</a>.</p>{{ end }}
-{{ end -}}
 </footer>
 
 {{ if $.Param "cookieconsent" }}{{ partialCached "cookieconsent.html" . }}{{ end -}}