diff --git a/functions.php b/functions.php
index 968a1b1..0a6fed4 100644
--- a/functions.php
+++ b/functions.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * Aldine functions and definitions
+ * Aldine functions and hooks
  *
  * @link https://developer.wordpress.org/themes/basics/theme-functions/
  *
@@ -21,7 +21,6 @@ if ( ! class_exists( 'PressbooksMix\\Assets' ) ) {
 	}
 	require_once $composer;
 }
-use PressbooksMix\Assets;
 
 $includes = [
 	'actions',
@@ -39,161 +38,12 @@ require get_template_directory() . '/inc/intervention.php';
 
 add_action( 'admin_init', '\\Aldine\\Activation\\create_default_content' );
 add_action( 'admin_bar_init', '\\Aldine\\Actions\\remove_admin_bar_callback' );
+add_action( 'after_setup_theme', '\\Aldine\\Actions\\setup' );
+add_action( 'after_setup_theme', '\\Aldine\\Actions\\content_width', 0 );
 add_action( 'wp_head', '\\Aldine\\Actions\\output_custom_colors' );
 add_filter( 'body_class', '\\Aldine\\Filters\\body_classes' );
 add_filter( 'excerpt_more', '\\Aldine\\Filters\\excerpt_more' );
-
-if ( ! function_exists( 'pressbooks_aldine_setup' ) ) :
-	/**
-	 * Sets up theme defaults and registers support for various WordPress features.
-	 *
-	 * Note that this function is hooked into the after_setup_theme hook, which
-	 * runs before the init hook. The init hook is too late for some features, such
-	 * as indicating support for post thumbnails.
-	 */
-	function pressbooks_aldine_setup() {
-		$assets = new Assets( 'pressbooks-aldine', 'theme' );
-		$assets->setSrcDirectory( 'assets' )->setDistDirectory( 'dist' );
-
-		/*
-		 * Make theme available for translation.
-		 * Translations can be filed in the /languages/ directory.
-		 */
-		load_theme_textdomain( 'aldine', get_template_directory() . '/languages' );
-
-		/*
-		 * Let WordPress manage the document title.
-		 * By adding theme support, we declare that this theme does not use a
-		 * hard-coded <title> tag in the document head, and expect WordPress to
-		 * provide it for us.
-		 */
-		add_theme_support( 'title-tag' );
-
-		/*
-		 * Enable support for Post Thumbnails on posts and pages.
-		 *
-		 * @link https://developer.wordpress.org/themes/functionality/featured-images-post-thumbnails/
-		 */
-		add_theme_support( 'post-thumbnails' );
-
-		// This theme uses wp_nav_menu() in one location.
-		register_nav_menus( [
-			'network-footer-menu' => __( 'Network Footer Menu', 'pressbooks-aldine' ),
-		] );
-
-		/*
-		 * Switch default core markup for search form, comment form, and comments
-		 * to output valid HTML5.
-		 */
-		add_theme_support( 'html5', [
-			'search-form',
-			'comment-form',
-			'comment-list',
-			'gallery',
-			'caption',
-		] );
-
-		// Set up the WordPress core custom header feature.
-		add_theme_support( 'custom-header', [
-			'default-image' => $assets->getPath( 'images/header.jpg' ),
-			'width' => 1920,
-			'height' => 884,
-			'default-text-color' => '#000',
-		] );
-
-		// Add theme support for selective refresh for widgets.
-		add_theme_support( 'customize-selective-refresh-widgets' );
-
-		/**
-		 * Add support for core custom logo.
-		 *
-		 * @link https://codex.wordpress.org/Theme_Logo
-		 */
-		add_theme_support( 'custom-logo', [
-			'height' => 40,
-			'width' => 265,
-			'flex-width' => true,
-			'flex-height' => true,
-		] );
-
-		// Add editor style.
-		add_editor_style( $assets->getPath( 'styles/editor.css' ) );
-	}
-endif;
-add_action( 'after_setup_theme', 'pressbooks_aldine_setup' );
-
-/**
- * Set the content width in pixels, based on the theme's design and stylesheet.
- *
- * Priority 0 to make it available to lower priority callbacks.
- *
- * @global int $content_width
- */
-function pressbooks_aldine_content_width() {
-	$GLOBALS['content_width'] = apply_filters( 'pressbooks_aldine_content_width', 640 );
-}
-add_action( 'after_setup_theme', 'pressbooks_aldine_content_width', 0 );
-
-/**
- * Register widget area.
- *
- * @link https://developer.wordpress.org/themes/functionality/sidebars/#registering-a-sidebar
- */
-function pressbooks_aldine_widgets_init() {
-	$config = [
-		'before_widget' => '<div class="widget %1$s %2$s">',
-		'after_widget'  => '</div>',
-		'before_title'  => '<h2>',
-		'after_title'   => '</h2>',
-	];
-	register_sidebar( [
-		'name'          => __( 'Front Page Content', 'pressbooks-aldine' ),
-		'description'   => __(
-			'Add content for your network&rsquo;s front page here. Currently, only text widgets are supported.',
-			'aldine'
-		),
-		'id'            => 'front-page-block',
-		'before_widget' => '<div class="block %1$s %2$s">',
-		'after_widget'  => '</div>',
-		'before_title'  => '<h2>',
-		'after_title'   => '</h2>',
-	] );
-	register_sidebar( [
-		'name'          => __( 'Network Footer Block 1', 'pressbooks-aldine' ),
-		'description'   => __(
-			'Add content for your network&rsquo;s customizeable footer here.
-            Currently, only text and image widgets are supported.
-            Content in this widget area will appear in the first row (on mobile) or the first column (on desktops).',
-			'aldine'
-		),
-		'id'            => 'network-footer-block-1',
-	] + $config );
-	register_sidebar( [
-		'name'          => __( 'Network Footer Block 2', 'pressbooks-aldine' ),
-		'description'   => __(
-			'Add content for your network&rsquo;s customizeable footer here.
-            Currently, only text and image widgets are supported.
-            Content in this widget area will appear in the second row (on mobile) or the middle column (on desktop).',
-			'aldine'
-		),
-		'id'            => 'network-footer-block-2',
-	] + $config );
-}
-add_action( 'widgets_init', 'pressbooks_aldine_widgets_init' );
-
-/**
- * Enqueue scripts and styles.
- */
-function pressbooks_aldine_scripts() {
-	$assets = new Assets( 'pressbooks-aldine', 'theme' );
-	$assets->setSrcDirectory( 'assets' )->setDistDirectory( 'dist' );
-
-	wp_enqueue_style( 'aldine/style', $assets->getPath( 'styles/aldine.css' ), false, null );
-	wp_enqueue_style( 'aldine/webfonts', 'https://fonts.googleapis.com/css?family=Karla:400,400i,700|Spectral:400,400i,600', false, null );
-	wp_enqueue_script( 'aldine/script', $assets->getPath( 'scripts/aldine.js' ), [ 'jquery' ], null, true );
-}
-add_action( 'wp_enqueue_scripts', 'pressbooks_aldine_scripts' );
-
+add_action( 'widgets_init', '\\Aldine\\Actions\\widgets_init' );
+add_action( 'wp_enqueue_scripts', '\\Aldine\\Actions\\enqueue_assets' );
 add_action( 'customize_register', '\\Aldine\\Customizer\\customize_register' );
 add_action( 'customize_preview_init', '\\Aldine\\Customizer\\customize_preview_js' );
-
diff --git a/header.php b/header.php
index 94ebf5f..73317f7 100644
--- a/header.php
+++ b/header.php
@@ -58,7 +58,7 @@
 						<?php switch_to_blog( 1 ); echo get_bloginfo( 'name', 'display' ); restore_current_blog(); ?>
 					</span> */ ?>
 				</a>
-				<h1><a href="<?php echo home_url('/' ); ?>"><?php echo get_bloginfo( 'name', 'display' ); ?></a></h1>
+				<h1><a href="<?php echo home_url( '/' ); ?>"><?php echo get_bloginfo( 'name', 'display' ); ?></a></h1>
 				<p><?php echo get_bloginfo( 'description', 'display' ); ?></p>
 			</div>
 			<div class="header__end-container">
diff --git a/inc/actions/namespace.php b/inc/actions/namespace.php
index a272d47..1b688de 100644
--- a/inc/actions/namespace.php
+++ b/inc/actions/namespace.php
@@ -6,6 +6,153 @@
 
 namespace Aldine\Actions;
 
+use PressbooksMix\Assets;
+
+/**
+ * Sets up theme defaults and registers support for various WordPress features.
+ *
+ * Note that this function is hooked into the after_setup_theme hook, which
+ * runs before the init hook. The init hook is too late for some features, such
+ * as indicating support for post thumbnails.
+ */
+function setup() {
+	$assets = new Assets( 'pressbooks-aldine', 'theme' );
+	$assets->setSrcDirectory( 'assets' )->setDistDirectory( 'dist' );
+
+	/*
+		* Make theme available for translation.
+		* Translations can be filed in the /languages/ directory.
+		*/
+	load_theme_textdomain( 'aldine', get_template_directory() . '/languages' );
+
+	/*
+		* Let WordPress manage the document title.
+		* By adding theme support, we declare that this theme does not use a
+		* hard-coded <title> tag in the document head, and expect WordPress to
+		* provide it for us.
+		*/
+	add_theme_support( 'title-tag' );
+
+	/*
+		* Enable support for Post Thumbnails on posts and pages.
+		*
+		* @link https://developer.wordpress.org/themes/functionality/featured-images-post-thumbnails/
+		*/
+	add_theme_support( 'post-thumbnails' );
+
+	// This theme uses wp_nav_menu() in one location.
+	register_nav_menus( [
+		'network-footer-menu' => __( 'Network Footer Menu', 'pressbooks-aldine' ),
+	] );
+
+	/*
+		* Switch default core markup for search form, comment form, and comments
+		* to output valid HTML5.
+		*/
+	add_theme_support( 'html5', [
+		'search-form',
+		'comment-form',
+		'comment-list',
+		'gallery',
+		'caption',
+	] );
+
+	// Set up the WordPress core custom header feature.
+	add_theme_support( 'custom-header', [
+		'default-image' => $assets->getPath( 'images/header.jpg' ),
+		'width' => 1920,
+		'height' => 884,
+		'default-text-color' => '#000',
+	] );
+
+	// Add theme support for selective refresh for widgets.
+	add_theme_support( 'customize-selective-refresh-widgets' );
+
+	/**
+	 * Add support for core custom logo.
+	 *
+	 * @link https://codex.wordpress.org/Theme_Logo
+	 */
+	add_theme_support( 'custom-logo', [
+		'height' => 40,
+		'width' => 265,
+		'flex-width' => true,
+		'flex-height' => true,
+	] );
+
+	// Add editor style.
+	add_editor_style( $assets->getPath( 'styles/editor.css' ) );
+}
+
+/**
+ * Register widget area.
+ *
+ * @link https://developer.wordpress.org/themes/functionality/sidebars/#registering-a-sidebar
+ */
+function widgets_init() {
+	$config = [
+		'before_widget' => '<div class="widget %1$s %2$s">',
+		'after_widget'  => '</div>',
+		'before_title'  => '<h2>',
+		'after_title'   => '</h2>',
+	];
+	register_sidebar( [
+		'name'          => __( 'Front Page Content', 'pressbooks-aldine' ),
+		'description'   => __(
+			'Add content for your network&rsquo;s front page here. Currently, only text widgets are supported.',
+			'aldine'
+		),
+		'id'            => 'front-page-block',
+		'before_widget' => '<div class="block %1$s %2$s">',
+		'after_widget'  => '</div>',
+		'before_title'  => '<h2>',
+		'after_title'   => '</h2>',
+	] );
+	register_sidebar( [
+		'name'          => __( 'Network Footer Block 1', 'pressbooks-aldine' ),
+		'description'   => __(
+			'Add content for your network&rsquo;s customizeable footer here.
+            Currently, only text and image widgets are supported.
+            Content in this widget area will appear in the first row (on mobile) or the first column (on desktops).',
+			'aldine'
+		),
+		'id'            => 'network-footer-block-1',
+	] + $config );
+	register_sidebar( [
+		'name'          => __( 'Network Footer Block 2', 'pressbooks-aldine' ),
+		'description'   => __(
+			'Add content for your network&rsquo;s customizeable footer here.
+            Currently, only text and image widgets are supported.
+            Content in this widget area will appear in the second row (on mobile) or the middle column (on desktop).',
+			'aldine'
+		),
+		'id'            => 'network-footer-block-2',
+	] + $config );
+}
+
+/**
+ * Enqueue scripts and styles.
+ */
+function enqueue_assets() {
+	$assets = new Assets( 'pressbooks-aldine', 'theme' );
+	$assets->setSrcDirectory( 'assets' )->setDistDirectory( 'dist' );
+
+	wp_enqueue_style( 'aldine/style', $assets->getPath( 'styles/aldine.css' ), false, null );
+	wp_enqueue_style( 'aldine/webfonts', 'https://fonts.googleapis.com/css?family=Karla:400,400i,700|Spectral:400,400i,600', false, null );
+	wp_enqueue_script( 'aldine/script', $assets->getPath( 'scripts/aldine.js' ), [ 'jquery' ], null, true );
+}
+
+/**
+ * Set the content width in pixels, based on the theme's design and stylesheet.
+ *
+ * Priority 0 to make it available to lower priority callbacks.
+ *
+ * @global int $content_width
+ */
+function content_width() {
+	$GLOBALS['content_width'] = apply_filters( 'pressbooks_aldine_content_width', 640 );
+}
+
 /**
  * Output custom colors as CSS variables.
  *