I'm looking at your current page and unfortunately, it seems your CRT code and your Krueger code are conflicting with each other. The CRT sets body::before to be fixed at top: 0; left: 0;, whereas the Krueger code sets the same pseudo-element to be fixed at bottom: -150px; right: -100px;.
As a very hacky workaround, you could try changing the code for Krueger to use nav::before. Because if I understand the code correctly, all you need for it to work is a visible element that appears only once on the page. Can't guarantee this will be bug-free though.
I'm looking at your current page and unfortunately, it seems your CRT code and your Krueger code are conflicting with each other. The CRT sets
body::beforeto be fixed attop: 0; left: 0;, whereas the Krueger code sets the same pseudo-element to be fixed atbottom: -150px; right: -100px;.As a very hacky workaround, you could try changing the code for Krueger to use
nav::before. Because if I understand the code correctly, all you need for it to work is a visible element that appears only once on the page. Can't guarantee this will be bug-free though.