.n-code-block-lines code{counter-reset:step;counter-increment:step calc(var(--start,1) - 1)}.n-code-block-lines code .line:before{content:counter(step);counter-increment:step;text-align:right;color:#a3a3a380;width:2.5rem;margin-right:.5rem;padding-right:.5rem;display:inline-block}