Forms - Customize text fields

I am trying to customize the form towards the bottom of the page so that the city, country, and state fields are aligned horizontally instead of vertically similar to how the first and last name fields are aligned. Any help would be greatly appreciated!

Here is the link to the webpage https://www.nxtus.io/enterpriseseries

You are a legend, mate! Works perfectly. I didn't know you could select which item in the form you want using "nth-child(#)". That will come in handy. Thank you!