pre[class*="language-"].line-numbers { position: relative; padding-left: 3.8em; counter-reset: linenumber; } pre[class*="language-"].line-numbers > code { position: relative; white-space: inherit; } .line-numbers .line-numbers-rows { position: absolute; pointer-events: none; top: 0; font-size: 100%; left: -3.8em; width: 3em; /* works for line-numbers below 1000 lines */ letter-spacing: -1px; border-right: 1px solid #999; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; } .line-numbers-rows > span { pointer-events: none; display: block; counter-increment: linenumber; } .line-numbers-rows > span:before { content: counter(linenumber); color: #999; display: block; padding-right: 0.8em; text-align: right; }