Guys...there is a plugin in the plugin repo by Matt Becket which is a blank plugin with css overridden so that you can use it for building a theme.
search plugin repo for 'skeleton' and you'll find it.
Edit the views/default/plugin_name/css.php file in that download, upload to your site via FTP or whatever, go to admin and hit 'upgrade' and then 'flush caches' and then take a look at your site.
thank you all. i'll try just now (sorry for my horrible english)
info@elgg.org
Security issues should be reported to security@elgg.org!
©2014 the Elgg Foundation
Elgg is a registered trademark of Thematic Networks.
Cover image by Raül Utrera is used under Creative Commons license.
Icons by Flaticon and FontAwesome.