diff --git a/sphinx-doc/source/_static/custom.css b/sphinx-doc/source/_static/custom.css
index 6f26a66da..42c9b6954 100644
--- a/sphinx-doc/source/_static/custom.css
+++ b/sphinx-doc/source/_static/custom.css
@@ -1,19 +1,35 @@
+body {
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+}
+
+a {
+    text-decoration: none;
+    color: #f06700;
+}
+
+a:hover {
+    color: #46a3ba;
+    text-decoration: underline;
+}
+
+ul ul {
+    display: none;
+}
+
+ul .toctree-l1 {
+    margin: 25px;
+    padding: 0;
+}
+
+ul .toctree-l1 a {
+    padding: 2px 15px;
+    display: block;
+}
+
+ul li:first-child {
+    border: none;
+}
+
 .wy-side-nav-search {
     background-color: #ff6e00;
 }
-/* 
-.news-banner{
-    margin-bottom: 24px; 
-    color: black;
-}
-.news-banner-title{
-    background-color: #6E8BA0;
-    font-weight: bold;
-    padding-left: 12px;
-    margin: 0;
-}
-.news-banner-content{
-    background-color: #E4E5E7;
-    padding-left: 12px;
-    margin: 0;
-} */
\ No newline at end of file
diff --git a/sphinx-doc/source/_static/ifm3d.js b/sphinx-doc/source/_static/ifm3d.js
new file mode 100644
index 000000000..25f2c2e96
--- /dev/null
+++ b/sphinx-doc/source/_static/ifm3d.js
@@ -0,0 +1,12 @@
+$(function() {
+    $('ul li a').click(function(e) {
+
+        if ($(this).siblings().length > 0) {
+            e.preventDefault();
+            $('ul ul').hide();
+            $(this).parents('ul').show();
+            $(this).next('ul').toggle();
+        }
+        console.log($(this).siblings().length);
+    });
+});
\ No newline at end of file
diff --git a/sphinx-doc/source/conf.py b/sphinx-doc/source/conf.py
index 00e9daee3..edc76f656 100644
--- a/sphinx-doc/source/conf.py
+++ b/sphinx-doc/source/conf.py
@@ -91,6 +91,9 @@
 html_css_files = [
     'custom.css',
 ]
+html_js_files = [
+    'ifm3d.js',
+]
 
 myst_enable_extensions = [
     "colon_fence",
@@ -116,4 +119,4 @@
     "ifm3d_gh_url" : "https://github.com/ifm/ifm3d",
     "ifm3d_main_branch":  "o3r/main-next", # The most up to date branch on ifm3d
     "ifm3d_latest_tag_url": "https://github.com/ifm/ifm3d/tags",
-}
\ No newline at end of file
+}