How to use bootstrap for netsuite online form template?

I'm working on creating a brief survey for customer orders following the guides @ suiteanswers - https://netsuite.custhelp.com/app/an...tail/a_id/9418

I'm at the part of actually making the online form template and noticed that it doesn't seem to be possible to use the bootstrap framework for these templates. Am I doing something wrong or are there any workarounds? For example, when you use <nlcustrecord2> for a custom field on your custom record, is there any way to style that with the bootstrap framework (or any framework)?

I should note, i'm basically looking for a way to make our forms look nicer.  For example, <nlcustrecord2> is a list / select tag.  There doesn't seem to be any way to control how big it is, font size, width, etc...