diff --git a/doc/conf.py b/doc/conf.py
index 0c65c642..e7249ff9 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -102,7 +102,13 @@ html_favicon = '../resources/icon.ico'
 
 html_logo = '../resources/icon-128x128.png'
 
+html_css_files = [
+    'center-rtd.css',
+]
+
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = []
+html_static_path = [
+    'css/center-rtd.css',
+]
diff --git a/doc/css/center-rtd.css b/doc/css/center-rtd.css
new file mode 100644
index 00000000..d992e36c
--- /dev/null
+++ b/doc/css/center-rtd.css
@@ -0,0 +1,17 @@
+@media screen and (min-width:1100px) {
+  .wy-nav-content-wrap {
+  margin-left: auto;
+ }
+ .wy-nav-content {
+  margin: auto;
+ }
+}
+
+@media screen and (max-width:1430px) {
+ .wy-nav-content-wrap {
+  margin-left: 300px;
+ }
+ .wy-nav-content {
+  margin: 0;
+ }
+}