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In your jotform http://www.jotformpro.com/form/51332314672953
make the adjustment to the injected CSS code on the form and make it like this
background-color : #000000;
margin-top : -40px;
margin-bottom : -40px;
padding-top : 26px !important;
this will reduce the top-bottom margin on the form.
Hope this help. Let us know if you need further assistance.