My POWR app is cut off on my BigCommerce site

Some BigCommerce themes use a fixed height for the main content area. This keeps the page from adjusting to the height of a dynamic element, such as our apps. The solution is to override the fixed height for the main content container class with an "auto" height.
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To do that, go to Storefront Design > Design Options > Styles > custom.css in your Bigcommerce admin.

In that file, add the following bit of code (you can add it to the last line so you can easily find it again later):

.equalize {height: auto !important;}

This should fix the issue and your whole App should appear correctly on your site.

 Example of cut off app: