I'd like to theme a date combo field on a node edit form to be side by side, rather than stacked vertically, as shown below. Dates are popups, if that makes a difference.
I'm working with the admin theme Seven, which I've sub-themed, in order to override theme functions or CSS as needed. What is the approach should I take for this kind of customization? Moving the "to" label isn't strictly necessary, but would be nice if possible.
Also wondering if there is some good reason why the to and from fields are arranged this way?
Edit: instructions for creating a subtheme are here: https://drupal.org/node/225125 This is an easy way to customize an Admin theme if needed.