Add grid on the front page

documentation/docs/index.md

@@ -5,6 +5,43 @@
 
 GeoModel is a **complete toolkit** to write and manage the **detector description** for High Energy Physics experiments.
 
+<div class="grid cards" markdown>
+
+-   :material-clock-fast:{ .lg .middle } __Set up in 5 minutes!__
+
+    ---
+
+    Install [`mkdocs-material`](#) with [`pip`](#) and get up
+    and running in minutes
+
+    [:octicons-arrow-right-24: Getting started](#)
+
+-   :fontawesome-brands-markdown:{ .lg .middle } __It's just Markdown__
+
+    ---
+
+    Focus on your content and generate a responsive and searchable static site
+
+    [:octicons-arrow-right-24: Reference](#)
+
+-   :material-format-font:{ .lg .middle } __Made to measure__
+
+    ---
+
+    Change the colors, fonts, language, icons, logo and more with a few lines
+
+    [:octicons-arrow-right-24: Customization](#)
+
+-   :material-scale-balance:{ .lg .middle } __Open Source, Apache 2.0__
+
+    ---
+
+    Material for MkDocs is licensed under Apache 2.0 and available on [GitLab](https://gitlab.cern.ch/GeoModelDev/GeoModel)
+
+    [:octicons-arrow-right-24: License](#)
+
+</div>
+
 
 ## Intro