help with Google search form input field formatting

Hi. I am trying to get a Google custom search form to look good. Here is the development page:

http://test2.ebwebwork.com/

The google custom search form does not display properly, because my existing stylesheet seems to be modifying the search form's appearance.

Because I got this search form from Google, using the Google custom search tool generator, I have only some script to work with:

<!-- SearchBox -->
<div class="SearchBox">
<script>
  (function() {
    var cx = '001382591411870128679:i7bnazymn94';
    var gcse = document.createElement('script');
    gcse.type = 'text/javascript';
    gcse.async = true;
    gcse.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') +
        '//www.google.com/cse/cse.js?cx=' + cx;
    var s = document.getElementsByTagName('script')[0];
    s.parentNode.insertBefore(gcse, s);
  })();
</script>

<gcse:searchbox-only></gcse:searchbox-only>
<!-- /SearchBox -->
</div>

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I can't apply CSS custom styling to that Google script.

Any ideas how I can make this search form look better, or remove the effects of my current style sheet on the search form? (I don't want to remove any parts of the existing style sheet; I need them for the rest of my web site.)

Thank you for any advice.

Eric