diff --git a/src/scwidgets/__init__.py b/src/scwidgets/__init__.py
index 5ffd191..0e22094 100644
--- a/src/scwidgets/__init__.py
+++ b/src/scwidgets/__init__.py
@@ -1,16 +1,12 @@
 __version__ = "0.1.0-dev0"
 __authors__ = "the scicode-widgets developer team"
 
-from ._css_style import CssStyle, get_css_style
 from .check import *  # noqa: F403
 from .code import *  # noqa: F403
 from .cue import *  # noqa: F403
 from .exercise import *  # noqa: F403
 
 __all__ = [  # noqa: F405
-    # css_style
-    "CssStyle",
-    "get_css_style",
     # cue
     "CueWidget",
     "CheckCueBox",
diff --git a/src/scwidgets/check/_widget_check_registry.py b/src/scwidgets/check/_widget_check_registry.py
index 9969078..e0c4b0b 100644
--- a/src/scwidgets/check/_widget_check_registry.py
+++ b/src/scwidgets/check/_widget_check_registry.py
@@ -7,8 +7,8 @@
 
 from ipywidgets import Button, HBox, Layout, Output, VBox, Widget
 
-from .._css_style import CssStyle
 from .._utils import Formatter
+from ..css_style import CssStyle
 from ._check import Check, CheckResult
 
 
diff --git a/src/scwidgets/_css_style.py b/src/scwidgets/css_style.py
similarity index 100%
rename from src/scwidgets/_css_style.py
rename to src/scwidgets/css_style.py
diff --git a/src/scwidgets/exercise/_widget_code_exercise.py b/src/scwidgets/exercise/_widget_code_exercise.py
index 30fb37f..7ca9995 100644
--- a/src/scwidgets/exercise/_widget_code_exercise.py
+++ b/src/scwidgets/exercise/_widget_code_exercise.py
@@ -12,11 +12,11 @@
 from widget_code_input import WidgetCodeInput
 from widget_code_input.utils import CodeValidationError
 
-from .._css_style import CssStyle
 from .._utils import Formatter
 from ..check import Check, CheckableWidget, CheckRegistry, CheckResult
 from ..code._widget_code_input import CodeInput
 from ..code._widget_parameter_panel import ParameterPanel
+from ..css_style import CssStyle
 from ..cue import (
     CheckCueBox,
     CheckResetCueButton,
diff --git a/src/scwidgets/exercise/_widget_exercise_registry.py b/src/scwidgets/exercise/_widget_exercise_registry.py
index 2fae42b..faa6410 100644
--- a/src/scwidgets/exercise/_widget_exercise_registry.py
+++ b/src/scwidgets/exercise/_widget_exercise_registry.py
@@ -11,8 +11,8 @@
 from IPython.display import display
 from ipywidgets import Button, Dropdown, HBox, Label, Layout, Output, Text, VBox
 
-from .._css_style import CssStyle
 from .._utils import Formatter
+from ..css_style import CssStyle
 
 
 class ExerciseWidget:
diff --git a/src/scwidgets/exercise/_widget_text_exercise.py b/src/scwidgets/exercise/_widget_text_exercise.py
index 6e0b41a..ddac8c5 100644
--- a/src/scwidgets/exercise/_widget_text_exercise.py
+++ b/src/scwidgets/exercise/_widget_text_exercise.py
@@ -2,8 +2,8 @@
 
 from ipywidgets import HTML, HBox, HTMLMath, Layout, Output, Textarea, VBox
 
-from .._css_style import CssStyle
 from .._utils import Formatter
+from ..css_style import CssStyle
 from ..cue import SaveCueBox, SaveResetCueButton
 from ._widget_exercise_registry import ExerciseRegistry, ExerciseWidget
 
diff --git a/tests/notebooks/widgets_cue.py b/tests/notebooks/widgets_cue.py
index f0e7e18..51ee111 100644
--- a/tests/notebooks/widgets_cue.py
+++ b/tests/notebooks/widgets_cue.py
@@ -16,10 +16,10 @@
 # +
 from ipywidgets import Text, VBox
 
-import scwidgets
+from scwidgets.css_style import get_css_style
 from scwidgets.cue import CheckCueBox, CueBox, ResetCueButton, SaveCueBox, UpdateCueBox
 
-scwidgets.get_css_style()
+get_css_style()
 # -
 
 # Test 1: