To make customizations you will need to edit the style.css file. Use !important if you have trouble over-writing a rule. We cannot help with customizations so you will be on your own for these.
There is a table of contents at the top of the style.css file for edits.
That would require custom css. It shouldn't be very difficult if you are handy with CSS. Our style.css should walk you through all of the containers you need to edit.
