Design issues need to be reviewed by a designer. If your organization has a designer or someone who is familiar with CSS, HTML and JavaScript, you may consult with them. Below are a few documents which can assist in the matter.

How to edit, modify or design Cascading Style Sheets (CSS)

How to add JavaScript, jQuery, CSS, HTML or any custom code to NetCommunity sites

NetCommunity Design Guide

Customer Support cannot write, edit or fix design behaviors. Blackbaud has a designated Professional Services team who can assist with design. Please contact your account manager to arrange for Professional Services.