app/assets/stylesheets/articles.css.scss

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Maintainability
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// Place all the styles related to the articles controller here.
// They will automatically be included in application.css.
// You can use Sass (SCSS) here: http://sass-lang.com/

.article-table {
  colgroup:first-child {
    width: 40%;
  }
  colgroup:last-child {
    width: 60%;
  }
}

.article-title-underline {
  border-color: #ddd;
  margin: 0;
}

.article-detail-area {
  line-height: 2em;
}

.comment-info {
  &.list-group-item-heading {
    margin-bottom: 1.5em;
  }

  &.dropdown {
    float: left;
  }

  &.date-time {
    text-align: right;
  }
}

.form-editor {
  position: relative;

  .toggle-markdown-help {
    cursor: pointer;
    position: absolute;
    top: 28px;
    right: 0;

    &:before {
      padding-right: 5px;
      vertical-align: middle;
    }
  }

  .modal-markdown-help {
    .modal-body {
      overflow: auto;

      table {
        th {
          padding: 10px;
          text-align: center;
        }

        td {
          padding: 10px;
        }
      }
    }
  }
}