Multiple CSS rules for body & HTML tags

That property can usually just be removed where it appears in your style.css, but that may create additional issues with your site.

A link to your blog and the active theme would help in providing more useful advice.

I have just adapted the Kubrick default theme.

Here is the link

My Portfolio

That is quite the adaptation … make sure you have a complete back-up of all your changes. They will likely be over-written with the next WordPress core update(s).

Ha ha, yes it is….I will, I have found that out the hard way!! Thank god for server back-ups.

Leave the overflow: hidden; it is good to be there. You have to get rid of any height: xy px; in your div that does not allow the content to go down, but hides it in it.