A minor thing are custom fields of type TEXTAREA miss the id value and only have their name set. Type INPUT have:
  id="<%- item.slug %>"
in addition to name field which enable jQuery modifications like:
  $('#myslug').css(...);
Also EMAIL and SELECT miss the id value. A workaround is to use the name, like:
  $('[name="myslug"]').css(...);
but having consistent name and id on the custom fields would be nice and clean.