Add the page slug body class

function wpcode_snippet_add_slug_body_class( $classes ) {

	global $post;

	if ( isset( $post ) ) {

		$classes[] = $post->post_type . '-' . $post->post_name;

	}

	return $classes;

}

add_filter( 'body_class', 'wpcode_snippet_add_slug_body_class' );