Add missing Styles import

docs/examples/timers/clock.py

@@ -3,6 +3,7 @@ from datetime import datetime
 from rich.align import Align
 
 from textual.app import App
+from textual.css.styles import Styles
 from textual.widget import Widget
 
 

docs/examples/widgets/custom.py

@@ -1,6 +1,7 @@
 from rich.panel import Panel
 
 from textual.app import App
+from textual.css.styles import Styles
 from textual.reactive import Reactive
 from textual.widget import Widget