Mobile sticky Add to cart problem

My Mobile sticky Add to cart not in right place please fix it How to edit this ?
-https://prnt.sc/-vh5lCqaSWO0
Both single and variable product page same problem

https://riversonybd.com/product/buy-1-get-1-attar-combo/
https://riversonybd.com/product/buy-1-get-1-attar-56ml-total/
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I share my site access

Hi,

This issue is caused by custom CSS code related to add to cart button. Check the video (https://gyazo.com/96be15a6cad16ab6dd7c6f64141b7201). Try to remove this (https://prnt.sc/ujNEaluzGJwH) custom code and check again.

Kind Regards

[Author]

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