Modifying embedded form fonts, HoneyBook

I would like to modify the font on this embedded form, but I'm not sure how to go about it. I have the font added to my css and the embed code is on the page. I'd like to target the large text headings, which appear to be .text-huge. 

This is the embed code from the HoneyBook form: 

<div class="hb-p-63dd7c8ad07356000873e879-2"></div><img height="1" width="1" style="display:none" src="https://www.honeybook.com/p.png?pid=63dd7c8ad07356000873e879">
<script>
  (function(h,b,s,n,i,p,e,t) {
    h._HB_ = h._HB_ || {};h._HB_.pid = i;;;;
    t=b.createElement(s);t.type="text/javascript";t.async=!0;t.src=n;
    e=b.getElementsByTagName(s)[0];e.parentNode.insertBefore(t,e);
})(window,document,"script","https://widget.honeybook.com/assets_users_production/websiteplacements/placement-controller.min.js","63dd7c8ad07356000873e879");
</script>

Ok, thank you! I saw where another designer used embedded code from Mailer Lite and isolated the object in the form field and changed the font via CSS code. I was so hoping to do that with this form.