How to make it so that there is no stairs in the css triangle?

Question

css

Hello, I made a css triangle, but a 1px ladder is very noticeable on it, how to make it so that regardless of the scale, transparent calc(50% - 1px),1px is always 1 pixel

div:before {
      content: "";
      position: absolute;
      left: 0;
      top: 100%;

      width: 100%;
      height: 2.5vmin;

      background: linear-gradient(
        to right top,
        transparent calc(50% - 1px),
        #1e1e1e 50%
      );
    }