enqueue stylesheet properly

.wp-env.json

@@ -1,4 +1,4 @@
 {
   "core": null,
-  "theme": [ "." ]
-}
+  "themes": [ "." ]
+}

functions.php

@@ -4,5 +4,7 @@ add_action('init', 'custom_stylesheet');
  
 function custom_stylesheet() {
     wp_register_style( 'custom-styles', get_template_directory_uri() . '/style.css' );
+    wp_enqueue_style( 'custom-styles' );
 }
-wp_enqueue_style( 'custom-styles' );
+
+add_action( 'wp_enqueue_scripts', 'custom_stylesheet' );