Stop assigning CSS to a.cta_button by id
The CTA buttons $('a.cta_button') have CSS applied via the id attribute, which includes a UID. CSS precedence rules leave COS template designers with no option but to restyle CTA buttons individually on every site where they're used, an increasing necessity because the CTA buttons do not include responsive CSS of their own.
Please change your stylesheet to move the a.cta_button's id to the class attribute, and refer to that class for your css instead of the button's id. This will allow COS designers to include reusable, responsive CTA buttons in their templates.
Troy Davis commented
Sorry, I should have typed "Please change your __CTA tag generator__ to move the a.cta_button's id to the class attribute, and refer to that class for your css instead of the anchor's id."