tack2us/app/assets/stylesheets/pastes.css.scss

// Place all the styles related to the pastes controller here.
// They will automatically be included in application.css.
// You can use Sass (SCSS) here: http://sass-lang.com/
.paste {
  .line-numbers {
    float: left;
    padding: 10px;
    margin: 1px 10px 0 0;
    border-right: 1px solid;

    line-height: 1.5;

    font-size: 12px;
    font-family: Menlo, Monaco, Consolas, "Courier New", monospace;

    text-align: right;
  }
  pre {
    margin: 0;
    padding: 10px;
    .code {
      margin: 0;
      font-size: 12px;
    }
  }
}