diff --git i/doc/basic-bootstrap/layout.html w/doc/basic-bootstrap/layout.html
index 5519c4b5..c6794102 100644
--- i/doc/basic-bootstrap/layout.html
+++ w/doc/basic-bootstrap/layout.html
@@ -102,7 +102,7 @@
 {%- endmacro %}
 
 {%- macro css() %}
-    <link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />
+    <link rel="stylesheet" href="{{ pathto('_static/' + styles[-1], 1) }}" type="text/css" />
     <link rel="stylesheet" href="{{ pathto('_static/pygments.css', 1) }}" type="text/css" />
     {%- for cssfile in css_files %}
     <link rel="stylesheet" href="{{ pathto(cssfile, 1) }}" type="text/css" />