Love the new administrator template! I was wondering if anyone had the know how to take the administrator/login page and have that same look for the system/offline page.
To style the offline page copy this file
joomla-root/templates/system/offline.php
into the root of your template-folder (for example "rt_zephyr_j15")
and change it like you want to. (Probably you did that already)
I would say this is not really admin-template related.
It's more a matter of the content-theme you use ...
If you use Zephyr ... I would try to make it look like Zephyr and not as the admin-template ...