[totaltec]

Kimba,
Try editing the CSS that I pointed out. In my example I had commented out the offending lines, but I had not provided code to override them. That is what you need to do.

Actually it sounds to me like you need to learn CSS in general before taking on this task.

I don't see your added CSS in the source code. I believe there is a box, "use custom CSS" that needs to be checked.

And in order for your CSS to take precedence over what already exists in the source code you must edit it and provide alternate instructions. You also might need to be more specific in order to override the existing CSS.

Here is an example. Try:

body table > thead > tr > th, table > tbody > tr > th,
table > tfoot > tr > th, table > thead > tr > td,
table > tbody > tr > td, table > tfoot > tr > td {
  border: 0;
}

body table > thead > tr > th, table > tbody > tr > th,
table > tfoot > tr > th, table > thead > tr > td,
table > tbody > tr > td, table > tfoot > tr > td {
  border-top: 0;
}