diff --git a/eis_projekt.html b/eis_projekt.html
index 715e2cd..7de4b75 100644
--- a/eis_projekt.html
+++ b/eis_projekt.html
@@ -20,6 +20,8 @@
       <li><a href="kontakt.html">Kontakt</a></li>
       <li><a href="impressum.html">Impressum</a></li>
     </ul>
+
+    <button id="dark-mode-toggle">Dark Mode</button>
   </nav>
 
   <div class="page">
diff --git a/impressum.html b/impressum.html
index 7914f99..47b43dc 100644
--- a/impressum.html
+++ b/impressum.html
@@ -20,6 +20,8 @@
       <li><a href="kontakt.html">Kontakt</a></li>
       <li><a href="impressum.html" class="active">Impressum</a></li>
     </ul>
+
+    <button id="dark-mode-toggle">Dark Mode</button>
   </nav>
 
   <div class="page">
diff --git a/kontakt.html b/kontakt.html
index 536ee5f..8f3aa89 100644
--- a/kontakt.html
+++ b/kontakt.html
@@ -20,6 +20,8 @@
       <li><a href="kontakt.html" class="active">Kontakt</a></li>
       <li><a href="impressum.html">Impressum</a></li>
     </ul>
+
+    <button id="dark-mode-toggle">Dark Mode</button>
   </nav>
 
   <div class="page">
diff --git a/notenrechner.html b/notenrechner.html
index 19882f6..b442098 100644
--- a/notenrechner.html
+++ b/notenrechner.html
@@ -19,6 +19,8 @@
       <li><a href="kontakt.html">Kontakt</a></li>
       <li><a href="impressum.html">Impressum</a></li>
     </ul>
+
+    <button id="dark-mode-toggle">Dark Mode</button>
   </nav>
 
   <div class="page">
diff --git a/textanalyse.html b/textanalyse.html
index 3dc7f29..2d3be24 100644
--- a/textanalyse.html
+++ b/textanalyse.html
@@ -19,6 +19,8 @@
       <li><a href="kontakt.html">Kontakt</a></li>
       <li><a href="impressum.html">Impressum</a></li>
     </ul>
+
+    <button id="dark-mode-toggle">Dark Mode</button>
   </nav>
 
   <div class="page">
diff --git a/ueber_mich.html b/ueber_mich.html
index 4b75e2c..5078b88 100644
--- a/ueber_mich.html
+++ b/ueber_mich.html
@@ -19,6 +19,8 @@
       <li><a href="kontakt.html">Kontakt</a></li>
       <li><a href="impressum.html">Impressum</a></li>
     </ul>
+
+    <button id="dark-mode-toggle">Dark Mode</button>
   </nav>
 
   <div class="page">