diff --git a/pygal/css/__init__.py b/pygal/css/__init__.py
new file mode 100644
index 0000000..fa709d1
--- /dev/null
+++ b/pygal/css/__init__.py
@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+# This file is part of pygal
+#
+# A python svg graph plotting library
+# Copyright © 2012-2018 Kozea
+#
+# This library is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with pygal. If not, see <http://www.gnu.org/licenses/>.
+
+"""CSS package containing all needed styles"""
+
+from pygal.css.base import CSS as CSS_BASE
+from pygal.css.graph import CSS as CSS_GRAPH
+from pygal.css.style import CSS as CSS_STYLE
+
+__all__ = ('CSS_BASE', 'CSS_GRAPH', 'CSS_STYLE',)
diff --git a/pygal/css/base.css b/pygal/css/base.py
similarity index 70%
rename from pygal/css/base.css
rename to pygal/css/base.py
index 01f5d5b..6b7c01f 100644
--- a/pygal/css/base.css
+++ b/pygal/css/base.py
@@ -1,4 +1,25 @@
-/*
+# -*- coding: utf-8 -*-
+# This file is part of pygal
+#
+# A python svg graph plotting library
+# Copyright © 2012-2018 Kozea
+#
+# This library is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with pygal. If not, see <http://www.gnu.org/licenses/>.
+
+"""Base styles"""
+
+CSS = """/*
  * This file is part of pygal
  *
  * A python svg graph plotting library
@@ -67,3 +88,4 @@
   font-family: {{ style.no_data_font_family }};
   font-size: {{ style.no_data_font_size }}px;
 }
+"""
diff --git a/pygal/css/graph.css b/pygal/css/graph.py
similarity index 77%
rename from pygal/css/graph.css
rename to pygal/css/graph.py
index a638fb7..08c6205 100644
--- a/pygal/css/graph.css
+++ b/pygal/css/graph.py
@@ -1,4 +1,25 @@
-/*
+# -*- coding: utf-8 -*-
+# This file is part of pygal
+#
+# A python svg graph plotting library
+# Copyright © 2012-2018 Kozea
+#
+# This library is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with pygal. If not, see <http://www.gnu.org/licenses/>.
+
+"""Graph styles"""
+
+CSS = """/*
  * This file is part of pygal
  *
  * A python svg graph plotting library
@@ -150,3 +171,4 @@
   stroke: {{ style.background }};
   stroke-width: 2px;
 }
+"""
diff --git a/pygal/css/style.css b/pygal/css/style.py
similarity index 81%
rename from pygal/css/style.css
rename to pygal/css/style.py
index cd01f06..57d78ec 100644
--- a/pygal/css/style.css
+++ b/pygal/css/style.py
@@ -1,4 +1,25 @@
-/*
+# -*- coding: utf-8 -*-
+# This file is part of pygal
+#
+# A python svg graph plotting library
+# Copyright © 2012-2018 Kozea
+#
+# This library is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with pygal. If not, see <http://www.gnu.org/licenses/>.
+
+"""Styles"""
+
+CSS = """/*
  * This file is part of pygal
  *
  * A python svg graph plotting library
@@ -172,3 +193,4 @@
 {{ colors }}
 
 {{ strokes }}
+"""