/* Replace only this filled blue triangle with a thin red downward chevron. */
#campaign-reason #route-warning-down {
  width: 80px;
  height: 22px;
  border: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 80 22'%3E%3Cpath d='M1 2 L40 20 L79 2' fill='none' stroke='%23ff0000' stroke-width='2'/%3E%3C/svg%3E") center / contain no-repeat;
}