You don't want tabs as indents. You want to use a text-indent in CSS. Forget the class para1. You do not need it. Use just <p> for the standard indented paragraphs. Here is some CSS that will do the job and do it well. Also get rid of the spans with span3 and get rid of the tabs.
CSS
Code:
p {
margin-top: 0;
margin-bottom: 0;
text-indent: 0;
}