diff --git a/assets/css/custom.css b/assets/css/custom.css
index 757549e..a18467c 100644
--- a/assets/css/custom.css
+++ b/assets/css/custom.css
@@ -738,6 +738,9 @@ a.byline-author:hover, a.journal-author:hover { color: var(--accent); }
 .wiki-nav li a.is-current { color: var(--color-text-primary); font-weight: 600; border-left-color: var(--accent); }
 
 .wiki-page { min-width: 0; }
+/* Header sitzt in der Inhaltsspalte → fluchtet mit dem Text; Oberkante mit der
+   Seitenleiste gleichziehen (section-header bringt sonst margin-top mit). */
+.wiki-page .section-header { margin-top: 0; }
 .wiki-index { margin-top: var(--spacing-md); }
 .wiki-group { margin-bottom: var(--spacing-md); }
 .wiki-group h2 { font-family: var(--font-family-serif); font-size: 1.1rem; margin: 0 0 0.4em; }
diff --git a/layouts/wiki/list.html b/layouts/wiki/list.html
index 9467845..cd46a23 100644
--- a/layouts/wiki/list.html
+++ b/layouts/wiki/list.html
@@ -1,12 +1,11 @@
 {{ define "main" }}
-  <header class="section-header">
-    <h1 class="section-title">{{ .Title }}</h1>
-  </header>
-
   <div class="wiki">
     <aside class="wiki-side">{{ partial "wiki-nav.html" . }}</aside>
 
     <div class="wiki-page">
+      <header class="section-header">
+        <h1 class="section-title">{{ .Title }}</h1>
+      </header>
       <div class="single-content">{{ .Content }}</div>
 
       {{ $pages := where site.RegularPages "Section" "wiki" }}
diff --git a/layouts/wiki/single.html b/layouts/wiki/single.html
index 1be4d19..8d083d6 100644
--- a/layouts/wiki/single.html
+++ b/layouts/wiki/single.html
@@ -1,14 +1,14 @@
 {{ define "main" }}
-  <header class="section-header">
-    <p class="section-rubric">{{ with .Params.group }}{{ . }}{{ else }}Wiki{{ end }}</p>
-    <h1 class="section-title">{{ .Title }}</h1>
-    {{ with .Params.summary }}<p class="section-description">{{ . }}</p>{{ end }}
-  </header>
-
   <div class="wiki">
     <aside class="wiki-side">{{ partial "wiki-nav.html" . }}</aside>
 
     <div class="wiki-page">
+      <header class="section-header">
+        <p class="section-rubric">{{ with .Params.group }}{{ . }}{{ else }}Wiki{{ end }}</p>
+        <h1 class="section-title">{{ .Title }}</h1>
+        {{ with .Params.summary }}<p class="section-description">{{ . }}</p>{{ end }}
+      </header>
+
       {{ $hasToC := .Params.toc | default false }}
       {{ $headers := findRE "<h[2-6]" .Content }}
       {{ if and $hasToC (ge (len $headers) 2) }}