Extension styling

src/components/Frame.tsx

@@ -1,9 +1,15 @@
 import type { ReactNode } from 'react';
 
+import './Frame.css';
+
 export interface FrameProps {
   children?: ReactNode;
 }
 
 export function Frame(props: FrameProps) {
-  return <div style={{ width: 300, height: 300 }}>{props.children}</div>;
+  return (
+    <div className="frame" style={{ width: 300, height: 300 }}>
+      {props.children}
+    </div>
+  );
 }