How can I center an embedded button on both desktop and mobile?

[SyaireeStudios]

I have an embedded button that I added to my site and I want to center it on desktop and mobile

<div data-fillout-id="a8rL2T2QBTus" data-fillout-embed-type="slider" data-fillout-button-text="Logo Design Form" data-fillout-button-color="#000000" data-fillout-slider-direction="right" data-fillout-inherit-parameters></div><script src="https://server.fillout.com/embed/v1/"></script>

[stefansweb2020 · Accepted solution]

<div style="text-align: center; margin: 0 auto;" data-fillout-id="a8rL2T2QBTus" data-fillout-embed-type="slider" data-fillout-button-text="Logo Design Form" data-fillout-button-color="#000000" data-fillout-slider-direction="right" data-fillout-inherit-parameters></div><script src="https://server.fillout.com/embed/v1/"></script>

[SyaireeStudios]

Is there a code to change the font to avenir next light ?