gitlab-org--gitlab-foss/app/assets/stylesheets/generic/highlight.scss

.highlighted-data {
  border: none;
  box-shadow: none;
  margin: 0px;
  padding: 0px;
  table-layout: fixed;

  pre {
    border: none;
    border-radius: 0;
    font-family: $monospace_font;
    font-size: 12px !important;
    line-height: 16px !important;
    margin: 0;

    code {
      white-space: pre;
      word-wrap: normal;
    }
  }

  .hljs {
    padding: 0;
  }

  .line-numbers {
    padding: 10px;
    text-align: right;
    float: left;
    width: 60px;

    a {
      font-family: $monospace_font;
      display: block;
      font-size: 12px !important;
      line-height: 16px !important;

      i {
        display: none;
      }

      &:hover i {
        display: inline;
      }
    }
  }

  .highlight {
    overflow: auto;
    overflow-y: hidden;

    pre {
      white-space: pre;
      word-wrap: normal;

      .line {
        padding: 0 10px;
      }
    }
  }
}