I’m not very sure about the problem. However; in the past, I’ve faced a similar problem where I lost the look and feel of the site. If this is a custom developed theme, I request you to check with index.php file and see if everything is working fine.
Ex: index.php works with the code flowing like <?php header();…, and something like that and check if you’ve not missed any tags in header.php file if you’ve called them.
Please do check if this theme is working by installing wordpress on wamp server as per your preferences. If it does work fine, check with the theme on the site now and hope it should be working fine. If possible, provide the url so that something can be better described.
There might be a case, where your style url is http://www.site.com/style.css and you might be calling http://www.site.com/style2.css accidentally. Hope this helps and look forward to hear from you soon.
