diff --git a/docs/conf.py b/docs/conf.py
index 46cc708..8b9ae44 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -17,6 +17,7 @@
 version = release
 
 extensions = [
+    "sphinx_design",
     "sphinx.ext.autodoc",
     "sphinx.ext.autosummary",
     "sphinx.ext.napoleon",
diff --git a/docs/index.rst b/docs/index.rst
index 58ac706..21c8e69 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -42,23 +42,24 @@ Tustison et al. (2026). *Deep Computational Anatomy via Latent-Aligned Normalizi
 .. dropdown:: BibTeX
 
    .. code-block:: bibtex
+
       @article {Tustison2026.05.05.723039,
-	author = {Tustison, Nicholas J. and Avants, Brian B. and Cook, Philip A. and Gee, James C. and Stone, James R.},
-	title = {Deep Computational Anatomy via Latent-Aligned Multiview Normalizing Flows},
-	elocation-id = {2026.05.05.723039},
-	year = {2026},
-	doi = {10.64898/2026.05.05.723039},
+        author = {Tustison, Nicholas J. and Avants, Brian B. and Cook, Philip A. and Gee, James C. and Stone, James R.},
+        title = {Deep Computational Anatomy via Latent-Aligned Multiview Normalizing Flows},
+        elocation-id = {2026.05.05.723039},
+        year = {2026},
+        doi = {10.64898/2026.05.05.723039},
         URL = {https://www.biorxiv.org/content/early/2026/05/11/2026.05.05.723039},
-	eprint = {https://www.biorxiv.org/content/early/2026/05/11/2026.05.05.723039.full.pdf},
-	journal = {bioRxiv}
+        eprint = {https://www.biorxiv.org/content/early/2026/05/11/2026.05.05.723039.full.pdf},
+        journal = {bioRxiv}
       }
 
-Stimper et al. (2023). *normflows: A PyTorch Package for Normalizing
-Flows*. Journal of Open Source Software, 8(86), 5361.
+Stimper et al. (2023). *normflows: A PyTorch Package for Normalizing Flows*. Journal of Open Source Software, 8(86), 5361.
 
 .. dropdown:: BibTeX
 
    .. code-block:: bibtex
+
       @article{Stimper2023,
         doi = {10.21105/joss.05361},
         url = {https://doi.org/10.21105/joss.05361},
diff --git a/pyproject.toml b/pyproject.toml
index 1c0cd07..04abfae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,6 +34,7 @@ test = ["pytest>=8.0", "pytest-cov>=4.1", "hypothesis>=6.0", "matplotlib"]
 dev  = ["black>=24.0", "ruff>=0.6.0", "mypy>=1.8", "pre-commit>=3.6", "build>=1.2.1", "twine>=5.0"]
 docs = [
   "sphinx>=7.2",
+  "sphinx-design>=0.6",
   "sphinx-rtd-theme>=2.0",
 ]