docs: fuse index

docs/source/index.rst

@@ -3,8 +3,53 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-Lightning-Graphcore documentation
-=================================
+Accelerator: IPU training
+=========================
+
+.. raw:: html
+
+    <div class="display-card-container">
+        <div class="row">
+
+.. Add callout items below this line
+
+.. displayitem::
+   :header: Prepare your code (Optional)
+   :description: Prepare your code to run on any hardware
+   :col_css: col-md-6
+   :button_link: prepare.html
+   :height: 150
+   :tag: basic
+
+.. displayitem::
+   :header: Basic
+   :description: Learn the basics of single and multi-IPU training.
+   :col_css: col-md-6
+   :button_link: basic.html
+   :height: 150
+   :tag: basic
+
+.. displayitem::
+   :header: Intermediate
+   :description: Tune model performance with mix-precision settings and the performance analyser.
+   :col_css: col-md-6
+   :button_link: intermediate.html
+   :height: 150
+   :tag: intermediate
+
+.. displayitem::
+   :header: Advanced
+   :description: Learn advanced techniques to customize IPU training for massive models.
+   :col_css: col-md-6
+   :button_link: advanced.html
+   :height: 150
+   :tag: advanced
+
+.. raw:: html
+
+        </div>
+    </div>
+
 .. toctree::
    :maxdepth: 1
    :name: start