Add missing Styles import

sandbox/align.py

@@ -1,6 +1,7 @@
 from rich.text import Text
 
 from textual.app import App, ComposeResult
+from textual.css.styles import Styles
 from textual.widget import Widget
 from textual.widgets import Static
 

sandbox/basic.py

@@ -3,6 +3,7 @@ from rich.syntax import Syntax
 from rich.text import Text
 
 from textual.app import App
+from textual.css.styles import Styles
 from textual.widget import Widget
 from textual.widgets import Static
 

sandbox/dev_sandbox.py

@@ -2,6 +2,7 @@ from rich.console import RenderableType
 from rich.panel import Panel
 
 from textual.app import App
+from textual.css.styles import Styles
 from textual.widget import Widget
 
 

sandbox/tabs.py

@@ -6,6 +6,7 @@ from rich.rule import Rule
 
 from textual import events
 from textual.app import App
+from textual.css.styles import Styles
 from textual.widget import Widget
 from textual.widgets.tabs import Tabs, Tab