I have had this issue with my site for a couple weeks now. I keep going back to my site to find that the styling has completely vanished. I thought this was a problem with the theme I was using and so changed it. The same thing has happened again. My wordpress is up to date and so are the plugins I have installed. I changed my login and password last night and re-assigned the theme. When I checked again today, the styling was gone once again!
Any help appreciated. The site is http://techchicltd.com