JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Form Designer Tool guide: http://www.jotform.com/help/300-Form-Designer-Tutorial-Let-s-create-fantastic-forms-
CSS Tutorial on W3Schools: http://www.w3schools.com/css/
Customize your Form using custom CSS code: http://www.jotform.com/help/75-Customize-your-Form-using-Custom-CSS-Codes
I made a quick look at your form and this is the the changes that I was able to make with reference to the website you shared: https://form.jotform.com/53205024999964?. It is possible but may take some time for you to have all design to be implemented. Please do visit the links for the Form Designer Tool and CSS I shared above.
I hope that helps.