Something like `border-t-[1px] border-t-[var(--border-color)]` doesn't show any result. `border-t-2` shows `border-top-width: 2px;` though. <img width="489" alt="image" src="https://github.com/user-attachments/assets/fbae0eb9-c3d4-4b88-aeed-37f6f901ef67">