Cleanup CSS

_includes/header.html

@@ -1,7 +1,7 @@
 <nav class="navbar navbar-default navbar-fixed-top" role="navigation">
     <div class="container">
         <div class="navbar-header">
-            <a class="navbar-brand" href="https://chaospott.de">
+            <a class="navbar-brand" href="/">
                 chaospott
             </a>
             <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".navbar-collapse">