please take a look at attached file.
You see left menu of Joomla 1.0. Several module styles like the orange and bright green ones. If module title is displayed it looks like (1) and (2). Nice.
If I unpublish the module title of these modules all looks like (4). So you need to add margin/padding to (4) and a border like you see in (1) and (2).
The same with (3). Here you need to add a margin/padding to the text even though the module title is displayed or not.
The structure is easy to understand and for somebody who is good in CSS it will only be a little small work.
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