Notes from people shipping real products with Nexvyn UI.
We copied the dialog source into our repo and changed two tokens. It matched the rest of our product on the first try, in both themes.
Keyboard support is the part I usually rebuild by hand. Arrow keys, Escape and focus return already worked, so I spent the week on our actual product.
I am not a designer and our marketing site still looks calm. Dark mode came along for free because everything reads from tokens.