public static function register_admin_styles() {
		$suffix = ( is_rtl() ? '-rtl' : '' ) . self::$suffix;

		wp_register_style( 'pum-admin-general', self::$css_url . 'pum-admin-general' . $suffix . '.css', array( 'dashicons', 'wp-color-picker' ), Popup_Maker::$VER );
		wp_register_style( 'pum-admin-batch', self::$css_url . 'pum-admin-batch' . $suffix . '.css', array( 'pum-admin-general' ), Popup_Maker::$VER );
		wp_register_style( 'pum-admin-popup-editor', self::$css_url . 'pum-admin-popup-editor' . $suffix . '.css', array( 'pum-admin-general' ), Popup_Maker::$VER );
		wp_register_style( 'pum-admin-theme-editor', self::$css_url . 'pum-admin-theme-editor' . $suffix . '.css', array( 'pum-admin-general' ), Popup_Maker::$VER );
		wp_register_style( 'pum-admin-extensions-page', self::$css_url . 'pum-admin-extensions-page' . $suffix . '.css', array( 'pum-admin-general' ), Popup_Maker::$VER );
		wp_register_style( 'pum-admin-settings-page', self::$css_url . 'pum-admin-settings-page' . $suffix . '.css', array( 'pum-admin-general' ), Popup_Maker::$VER );
		wp_register_style( 'pum-admin-support-page', self::$css_url . 'pum-admin-support-page' . $suffix . '.css', array( 'pum-admin-general' ), Popup_Maker::$VER );
		wp_register_style( 'pum-admin-shortcode-ui', self::$css_url . 'pum-admin-shortcode-ui' . $suffix . '.css', array( 'pum-admin-general' ), Popup_Maker::$VER );

		// @deprecated handle. Currently loads empty file and admin-general as dependency.
		wp_register_style( 'popup-maker-admin', self::$css_url . 'pum-admin-deprecated' . $suffix . '.css', array( 'pum-admin-general' ), Popup_Maker::$VER );

		if ( PUM_Utils_Upgrades::instance()->has_uncomplete_upgrades() ) {
			wp_enqueue_style( 'pum-admin-batch' );
		}

		if ( pum_is_popup_editor() ) {
			wp_enqueue_style( 'pum-admin-popup-editor' );
		}

		if ( pum_is_popup_theme_editor() ) {
			PUM_Site_Assets::register_styles();
			wp_enqueue_style( 'pum-admin-theme-editor' );
		}

		if ( pum_is_extensions_page() ) {
			wp_enqueue_style( 'pum-admin-extensions-page' );
		}

		if ( pum_is_settings_page() ) {
			wp_enqueue_style( 'pum-admin-settings-page' );
		}

		if ( pum_is_support_page() ) {
			wp_enqueue_style( 'pum-admin-support-page' );
		}
	}