.highlight {
    padding-left: 16px !important;
}

.highlight pre {
    counter-reset: code-line;
}

.highlight pre .code-line {
    counter-increment: code-line;
}

.highlight pre .code-line::before {
    content: counter(code-line);

    display: inline-block;
    box-sizing: border-box;

    width: 2em;
    margin-right: 1em;
    padding-right: 0.8em;

    text-align: right;
    color: #65758b;

    border-right: 1px solid #343a40;

    user-select: none;
    pointer-events: none;
}