Negotiating an offer, is it too late? (Tulsa)

It is the first offer in 14 months and I do not want to mess it up. This is my first time dealing with any of this. The hiring manager was friendly and open. What wording worked?

Most employers expect a short conversation. Mine did not even blink.

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.