diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
new file mode 100644
index 00000000..4e5be0a7
--- /dev/null
+++ b/.github/workflows/deploy-docs.yml
@@ -0,0 +1,17 @@
+name: "Deploy docs to GitHub Pages"
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+      - uses: atirut-w/mkdocs-deploy@master
+        with:
+          docs-dir: docs
+          extra-packages: mkdocs-material
diff --git a/docs/calling-convention.md b/docs/calling-convention.md
new file mode 100644
index 00000000..b4ee1bbb
--- /dev/null
+++ b/docs/calling-convention.md
@@ -0,0 +1,5 @@
+# Calling Convention
+!!! warning
+    Calling convention may change during development. This document is a work in progress.
+!!! todo
+    TODO: Document calling convention.
diff --git a/docs/index.md b/docs/index.md
new file mode 100644
index 00000000..bfc65b90
--- /dev/null
+++ b/docs/index.md
@@ -0,0 +1,5 @@
+# ZDK
+C compiler and libraries for Z80 development.
+
+!!! note
+    This documentation is a work in progress. If anything's missing, feel free to open an issue or a pull request. Be sure to watch out for duplicate issues and pull requests, though!
diff --git a/mkdocs.yml b/mkdocs.yml
new file mode 100644
index 00000000..12d92bfd
--- /dev/null
+++ b/mkdocs.yml
@@ -0,0 +1,22 @@
+site_name: ZDK Documentation
+site_url: https://atirut-w.github.io/zdk
+
+repo_url: https://github.com/atirut-w/zdk/
+repo_name: atirut-w/zdk
+edit_uri: edit/main/docs/
+
+theme:
+  name: material
+  palette:
+    - media: "(prefers-color-scheme)"
+    - media: "(prefers-color-scheme: light)"
+      scheme: "default"
+      primary: "blue grey"
+      accent: "grey"
+    - media: "(prefers-color-scheme: dark)"
+      scheme: "slate"
+      primary: "black"
+      accent: "grey"
+
+markdown_extensions:
+  - admonition