docs: Update theme

docs/conf.py

@@ -88,7 +88,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = 'en'
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used:
@@ -129,15 +129,20 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'nature'
+html_theme = 'sphinx_rtd_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
-#html_theme_options = {}
+html_theme_options = {
+    'collapse_navigation': True,
+    'sticky_navigation': True,
+}
 
 # Add any paths that contain custom themes here, relative to this directory.
-#html_theme_path = []
+html_theme_path = []
+if os.environ.get('SPHINXTHEMEPATH'):
+    html_theme_path.append(os.environ['SPHINXTHEMEPATH'])
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
@@ -148,7 +153,7 @@
 
 # The name of an image file (relative to this directory) to place at the top
 # of the sidebar.
-html_logo = "_static/fileseq_vertical.png"
+html_logo = "_static/fileseq_small.png"
 
 # The name of an image file (within the static path) to use as favicon of the
 # docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32

requirements.txt

@@ -4,3 +4,7 @@ typing-extensions
 pytest
 pylint
 flake8
+
+# docs
+sphinx
+sphinx-rtd-theme