Add styles

src/routes/editor/index.js

@@ -1,16 +1,21 @@
 import {h} from 'preact'
 import {Link} from 'preact-router/match'
 
+import style from './style.css'
+
 const Editor = ({markdown, setMarkdown}) => (
   <section>
     <textarea
+      class={ style.textarea }
       onInput={ ({target}) => setMarkdown(target.value) }>
         { markdown }
     </textarea>
 
-    <Link href='/preview'>
-      Preview
-    </Link>
-	</section>)
+    <nav>
+      <Link href='/preview'>
+        Preview
+      </Link>
+    </nav>
+  </section>)
 
 export default Editor