diff --git a/docs/_static/theme-basic.zip b/docs/_static/theme-basic.zip
deleted file mode 100644
index d1e4754a..00000000
Binary files a/docs/_static/theme-basic.zip and /dev/null differ
diff --git a/docs/themes.rst b/docs/themes.rst
index fa4c9d37..c17d0fbd 100644
--- a/docs/themes.rst
+++ b/docs/themes.rst
@@ -589,38 +589,12 @@ using the ``{% extends %}`` directive as in the following example:
 Example
 -------
 
-With this system, it is possible to create a theme with just two files.
+With this system, it is possible to create a theme with just one file.
 
-base.html
-"""""""""
+main.css
+""""""""
 
-The first file is the ``templates/base.html`` template:
-
-.. code-block:: html+jinja
-
-    {% extends "!simple/base.html" %}
-
-    {% block head %}
-    {{ super() }}
-       <link rel="stylesheet" type="text/css" href="{{ SITEURL }}/theme/css/style.css" />
-    {% endblock %}
-
-1. On the first line, we extend the ``base.html`` template from the ``simple``
-   theme, so we don't have to rewrite the entire file.
-2. On the third line, we open the ``head`` block which has already been defined
-   in the ``simple`` theme.
-3. On the fourth line, the function ``super()`` keeps the content previously
-   inserted in the ``head`` block.
-4. On the fifth line, we append a stylesheet to the page.
-5. On the last line, we close the ``head`` block.
-
-This file will be extended by all the other templates, so the stylesheet will
-be linked from all pages.
-
-style.css
-"""""""""
-
-The second file is the ``static/css/style.css`` CSS stylesheet:
+The file is ``static/css/main.css`` (the default ``CSS_FILE``):
 
 .. code-block:: css
 
@@ -663,10 +637,32 @@ The second file is the ``static/css/style.css`` CSS stylesheet:
         margin-top : 1em ;
     }
 
-Download
-""""""""
+Custom templates
+""""""""""""""""
 
-You can download this example theme :download:`here <_static/theme-basic.zip>`.
+If you want to customise the templates as well, you can extend them. For
+example, to add a custom footer, create a ``templates/base.html``:
+
+.. code-block:: html+jinja
+
+    {% extends "!simple/base.html" %}
+
+    {% block footer %}
+        <p>Custom footer</p>
+    {{ super() }}
+    {% endblock %}
+
+1. On the first line, we extend the ``base.html`` template from the ``simple``
+   theme, so we don't have to rewrite the entire file.
+2. On the third line, we open the ``footer`` block which has already been
+   defined in the ``simple`` theme.
+3. On the fourth line, we insert the extra footer content.
+4. On the fifth line, the function ``super()`` keeps the content previously
+   inserted in the ``head`` block.
+5. On the last line, we close the ``footer`` block.
+
+This file will be extended by all the other templates, so the custom footer
+will appear on all pages.
 
 
 .. Links
diff --git a/pelican/tests/test_theme.py b/pelican/tests/test_theme.py
index 4e47eb2a..7012b2e4 100644
--- a/pelican/tests/test_theme.py
+++ b/pelican/tests/test_theme.py
@@ -218,5 +218,42 @@ class TestTemplateInheritance(LoggedTestCase):
             content,
         )
 
+    def test_css_only_theme(self):
+        """A theme with only a static/css/main.css file (no templates)
+        should work by falling back to the simple theme's templates."""
+
+        css_only_theme = mkdtemp(prefix="pelican_test_css_only_theme.")
+        css_dir = os.path.join(css_only_theme, "static", "css")
+        os.makedirs(css_dir)
+        with open(os.path.join(css_dir, "main.css"), "w") as f:
+            f.write("body { margin: 0; }")
+
+        try:
+            settings = read_settings(
+                path=None,
+                override={
+                    "THEME": css_only_theme,
+                    "PATH": CONTENT_DIR,
+                    "OUTPUT_PATH": self.temp_output,
+                    "CACHE_PATH": self.temp_cache,
+                    "SITEURL": "http://example.com",
+                },
+            )
+
+            pelican = Pelican(settings=settings)
+            mute(True)(pelican.run)()
+
+            with open(os.path.join(self.temp_output, "test-md-file.html")) as f:
+                content = f.read()
+
+            self.assertIn(
+                'href="http://example.com/theme/css/main.css"',
+                content,
+            )
+            self.assertIn("Proudly powered by", content)
+        finally:
+            rmtree(css_only_theme)
+
+
 if __name__ == "__main__":
     unittest.main()