Is there an \"invisible\" tag in HTML (4) that I can use to make CSS distinctions
tag.myclass tag.mysubclass h1 { }
without having
If you want to group elements use a div or a span tag as a wrapper element. Apply your id or class to this, and style it accordingly.
EDIT
There isn't an 'invisible' tag - but margins and padding can be easily reset 'margin: 0; padding: 0;'