Positioning text in tabs [on hold]

I'm currently building a practice website and need some help with positioning text. I am choosing tabs one by one as shown in the image to get to the tab that interests me marked with the arrow.When I put the text css style in correct position, the other styles of other tabs get all messed up. How it could not affect other tabs and simply change the position of the text in that tab?

Thanks a lot

http://ift.tt/1pJfKaK

The css class is as follows

input.paypalBuyBig
{
    background: none repeat scroll 0 0 transparent;
    border: none;
    color: ".$textoYovipAmarillo.";
    cursor: pointer;
    font-size: 20px;
    font-weight: bold;
    margin-left: -217px;
    margin-top: 49px;
    position:absolute;
}