Respect base URL for nav logo; prefer logo.svg over favicon.svg

Reference the navbar brand image through relURL so it resolves
correctly when the site is served from a non-root base URL. Use
static/img/logo.svg when present, falling back to img/favicon.svg.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -1,3 +1,15 @@
 # hugo_bootstrap_theme
 
 Simple Bootstrap-based theme for Hugo.
+
+
+## Custom error page
+
+The theme has a custom 404 error page.
+
+If the site has an SVG image in `assets/svg/404.svg`,
+this image will be displayed instead of a generic 404
+code. Regardless of whether an SVG assets exists or not,
+English and German explanations of what's going on will
+be included on the page.
+

layouts/404.html

@@ -0,0 +1,47 @@
+{{ define "main" }}
+<div class="container">
+  <div class="row">
+    <div class="col mt-5 mb-5">
+      {{ with resources.Get "svg/404.svg" }}
+        {{ .Content | safeHTML }}
+      {{ else }}
+        <h1 class="display-1 mx-auto text-center">
+          404
+        </h1>
+      {{ end }}
+    </div>
+  </div>
+  <div class="row">
+    <div class="col-lg-6">
+      <div class="alert alert-danger mb-5" lang="en">
+        <h4 class="alert-heading">
+          Page not found
+        </h4>
+        <p>
+          The page you were trying to navigate to was not found on this
+          server.
+        </p>
+        <hr />
+        <p class="mb-0">
+          <a href="{{ .Site.BaseURL }}" class="alert-link">Back to the home page.</a>
+        </p>
+      </div>
+    </div>
+    <div class="col-lg-6">
+      <div class="alert alert-danger" lang="de">
+        <h4 class="alert-heading">
+          Seite nicht gefunden
+        </h4>
+        <p>
+          Die angeforderte Seite existiert nicht auf diesem Server.
+        </p>
+        <hr />
+        <p class="mb-0">
+          <a href="{{ .Site.BaseURL }}" class="alert-link">Zurück zur Homepage.</a>
+        </p>
+      </div>
+    </div>
+  </div>
+</div>
+{{ end }}
+

layouts/_partials/footer.html

@@ -2,7 +2,7 @@
   <div class="container py-4">
     <div class="row">
       <div class="col-md-6">
-        <p>&copy; {{ now.Year }} {{ .Site.Title }}</p>
+        <p>&copy; {{ now.Year }} {{ or (or .Params.Author .Site.Params.Author) .Site.Title }}</p>
       </div>
       <div class="col-md-6 text-md-end">
         <p>

layouts/_partials/header.html

@@ -1,7 +1,9 @@
 <nav class="navbar navbar-expand-lg navbar-light bg-light sticky-top">
   <div class="container"> <!-- Changed from container-fluid to container -->
     <a class="navbar-brand fw-bold" href="{{ .Site.BaseURL }}">
-      <img src="/img/favicon.svg" alt="{{ .Site.Title }}" title="{{ .Site.Title }}">
+      {{- $logo := "img/favicon.svg" -}}
+      {{- if os.FileExists "static/img/logo.svg" -}}{{- $logo = "img/logo.svg" -}}{{- end -}}
+      <img src="{{ $logo | relURL }}" alt="{{ .Site.Title }}" title="{{ .Site.Title }}">
     </a>
     
     <button class="navbar-toggler" type="button" data-bs-toggle="collapse" 

layouts/_partials/human_file_size.html

@@ -0,0 +1,7 @@
+{{/* Call this with a resource's content e.g., partial "human_file_size" .Content */}}
+{{- $bytes := len . -}}
+{{- $kb := div $bytes 1024 -}}
+{{- $mb := div $kb 1024 -}}
+{{- if ge $mb 1 -}}{{- $mb -}} MB
+{{- else if ge $kb 1 -}}{{- $kb -}} KB
+{{- else -}}{{- $bytes -}} B{{- end -}}

layouts/_partials/meta.html

@@ -1,27 +1,26 @@
 <meta charset="UTF-8">
-<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>{{ if .IsHome }}{{ .Site.Title }}{{ else }}{{ .Title }} - {{ .Site.Title }}{{ end }}</title>
 <meta name="description" content="{{ .Page.Params.description }}">
-<meta name="author" content="{{ .Site.Params.author }}">
-<meta name="generator" content="{{ hugo.Environment }}">
+<meta name="author" content="{{ or .Page.Params.author .Site.Params.author }}">
+<meta name="generator" content="gohugo.io; {{ hugo.Environment }}">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
 <link rel="icon" type="image/png" href="/img/favicon.png">
 
-<title>{{ if .IsHome }}{{ .Site.Title }}{{ else }}{{ .Title }} - {{ .Site.Title }}{{ end }}</title>
-
 <!-- Compile SCSS to CSS -->
-{{ with resources.Get "scss/main.scss" }}
-    {{ $opts := dict
-        "enableSourceMap" (not hugo.IsProduction)
-        "outputStyle" (cond hugo.IsProduction "compressed" "expanded")
-        "targetPath" "css/main.css"
-        "transpiler" "dartsass"
-    }}
-    {{ with . | toCSS $opts }}
-        {{ if hugo.IsProduction }}
-            {{ with . | fingerprint "sha512" }}
-                <link rel="stylesheet" href="{{ .RelPermalink }}" integrity="{{ .Data.Integrity }}" crossorigin="anonymous">
-            {{ end }}
-        {{ else }}
-            <link rel="stylesheet" href="{{ .RelPermalink }}">
-        {{ end }}
-    {{ end }}
-{{ end }}
+{{- with resources.Get "scss/main.scss" -}}
+  {{- $opts := dict
+    "enableSourceMap" (not hugo.IsProduction)
+    "outputStyle" (cond hugo.IsProduction "compressed" "expanded")
+    "targetPath" "css/main.css"
+    "transpiler" "dartsass"
+  -}}
+  {{- with . | toCSS $opts -}}
+    {{- if hugo.IsProduction -}}
+      {{- with . | fingerprint "sha512" -}}
+          <link rel="stylesheet" href="{{ .RelPermalink }}" integrity="{{ .Data.Integrity }}" crossorigin="anonymous">
+      {{- end -}}
+    {{- else -}}
+      <link rel="stylesheet" href="{{ .RelPermalink }}">
+    {{- end -}}
+  {{- end -}}
+{{- end -}}

layouts/_partials/scripts.html

@@ -11,4 +11,4 @@
   <script src="{{ $custom.RelPermalink }}" integrity="{{ $custom.Data.Integrity }}" crossorigin="anonymous"></script>
 {{ end }}
 
-{{ partial "scripts_extra.html "}}
+{{ partial "scripts_extra.html" . }}

layouts/_partials/scripts_extra.html

@@ -0,0 +1,2 @@
+<!-- extra scripts may go here -->
+

layouts/baseof.html

@@ -3,6 +3,7 @@
 <head>
     {{- partial "meta.html" . -}}
     {{- partial "head_extra.html" . -}}
+    {{- block "extra_head" . }}{{ end }}
 </head>
 <body>
     {{- partial "header.html" . -}}