Hi Richmond what you need to do is add the class button2 along with the class button like this.
<span class="button-wrapper button button-2">
<a href="#">Button 2</a>
You then would use the following CSS
In the above code
The reason why we would set the max-width to none is because otherwise it would only go to a max width 1064px as stated in the class button-wrapper.
I would also recommend unless other elements other then the span element is the class button-wrapper to remove span in front of the class button-wrapper because it will search for every span that has a class called button-wrapper which slows down the loading time.
If you need any further help please leave me know.