Dashboard not working

Hi there

I did a website for a client of mine about a year ago. It’s still on a tempsite because the copy is not finalised. But now I want to put an ‘Under construction’ page on in case someone finds the site, but my dashboard has no css on, so it appears as just a list of all the items on the dashboard, but there is no functionality. The website itself works, but not the dashboard! How can I fix this?

The page I need help with: [log in to see the link]