Removing empty space

[haredo]

How to remove or reduce this empty space - picture arrached?

Da,
Locate this:
includes/templates/classic/css/stylesheet.css

Find this:
#headerWrapper, #contentMainWrapper, #logoWrapper, #cartBoxListWrapper, #ezPageBoxList, #cartBoxListWrapper ul, #ezPageBoxList ul, #popupAdditionalImage, #popupImage {
margin: 0em;
padding: 0em;
}

Change to this:
#headerWrapper, #logoWrapper, #cartBoxListWrapper, #ezPageBoxList, #cartBoxListWrapper ul, #ezPageBoxList ul, #popupAdditionalImage, #popupImage {
margin: 0em;
padding: 0em;
}

#contentMainWrapper {
margin-top: -2em;
}