Center text on a website.

Hello, I am using the plugin 'Slider Revolution' on a website running Wordpress. The website is using the "Nomad" Wordpress theme with the "Slider Revolution" plugin. The only issue I am having, that I haven't been able to diagnose (I am not a coding expert), is that the text on the slider is not centered on all browser sizes. It is centered on a ~17" screen, but on a significantly larger or smaller screen, the text is not centered. I would post the website but last time I did that, some very rude people (not necessarily you!) called the business number trying to get hired. NOT COOL. So please contact me for the website URL before you place your bid (and DO NOT contact the business directly - we won't hire you if that is the case, with all due respect). The phone line is for our CUSTOMERS. So, the project: Center text on Slider Revolution plugin. There are three sliders and it is off on all three. I have the "Text-Align: Center" option set, and have also tried "Text-Align: Inherent". It should be simple for somebody who knows what they are doing. Also, highly-rated/trustworthy freelancers may be paid in any major cryptocurrency either half or full up front at my discretion. Thank you for your interest and your bid! Budget: <$30-$50 for full project completion.