discourse/app/assets/stylesheets/desktop/topic-list.scss

  // --------------------------------------------------
  // Topic lists
  // --------------------------------------------------

  // List controls
  // --------------------------------------------------

  .list-controls {
    .nav {
      float: left;
      margin-bottom: 18px;
    }

    .btn {
      float: right;
      margin-left: 8px;
      margin-bottom: 10px;
      font-size: $font-up-1;
      font-weight: normal;
    }

    .search .btn {
      float: none;
    }

    a.badge-category {
      padding: 3px 12px;
      font-size: $font-up-1;
    }

  }

  // Base list
  // --------------------------------------------------

  .topic-list-icons {
    .d-icon-thumb-tack { color: dark-light-choose($primary-medium, $secondary-medium); }
    .d-icon-thumb-tack.unpinned { color: dark-light-choose($primary-medium, $secondary-medium); }
    a.title {color: $primary;}
    .d-icon-bookmark { color: dark-light-choose($primary-medium, $secondary-medium); }
  }

  .topic-list {
    @extend .topic-list-icons;

    margin: 0 0 10px;
    th,
    td {
      padding: 12px 5px;
      &:first-of-type {
        padding-left: 10px;
      }
      &:last-of-type {
        padding-right: 10px;
      }
    }
    th {
      button .d-icon {color: dark-light-choose($primary-medium, $secondary-medium); }
    }

    > tbody > tr {
      &.highlighted {
        animation: background-fade-highlight 2.5s ease-out;
      }
    }
    button.bulk-select {
      padding: 0;
    }

    td.bulk-select {
      padding: 10px;
      + .main-link {
        padding-left: 0;
      }
    }
    
    .badge-notification {
      position: relative;
      top: -2px;
      &.new-topic {
        top: -1px;
        padding-left: 5px;
      }
    }

    .posters {
    // we know there are up to 5 avatars of fixed size
    // will be overridden by media width queries on narrow displays to 1 avatar's width
    width: 146px;    
      > a {
        float: left;
        margin-right: 4px;
        &:last-of-type {
          margin-right: 0;
        }
      }
    }
    td.posters {
      height: 29px; // min-height of td with avatar glow
    }
    .posters a:first-child .avatar.latest:not(.single) {
      box-shadow: 0 0 3px 1px desaturate($tertiary-medium, 35%);
      border: 2px solid desaturate($tertiary-medium, 40%);
      position: relative;
      top: -2px;
      left: -2px;
    }


    .sortable {
      cursor: pointer;
      &:hover {
        background-color: $primary-low;
      }
      @include unselectable;
    }
    .likes {
      width: 65px;
    }
    .views {
      width: 65px;
    }
    .posts {
      width: 65px;
    }

    .post-actions {
      clear: both;
      width: auto;
      color: dark-light-choose($primary-medium, $secondary-medium);
      text-align: left;
      font-size: $font-down-1;
      margin-top: 5px;
      .fa {
        margin-right: 2px;
      }
      a {
        color: dark-light-choose($primary-medium, $secondary-medium);
        margin-right: 3px;
        line-height: $line-height-large;
      }
    }
    .activity {
      width: 60px;
      &:lang(zh_CN) {
        width: 80px;
      }
      span {
        cursor: pointer;
      }
    }
    .age {
      width: 60px;
    }
    .with-year {
      white-space: nowrap;
    }
  }

  .topic-list.categories {
    a.title {
      color: $tertiary;
    }

    th.posts {
      position: relative;
    }
    th.stats {
      width: 90px;
    }
    td.latest {
      vertical-align: top;
      padding: 0 8px 8px;
    }
    .last-user-info {
      font-size: $font-down-1;
    }
    .has-description {
      td.category {
        padding-top: 15px;
      }
    }
    .category{
      h3 {
        display: inline-block;
        font-size: $font-up-2;
        i {
          margin-right: 5px;
        }
        a[href] {
          color: $primary;
        }
      }
      .subcategories {
        margin-top: 10px;
      }
      .category-description {
        margin-top: 10px;
      }
      .clear-badge {
        color: $primary;
      }
    }

    .featured-topic {
      margin: 10px 0 0;
      /* topic status glyphs */
      i {
        color: dark-light-choose($primary-medium, $secondary-medium) !important;
        font-size: 0.929em;
      }
      a.last-posted-at, a.last-posted-at:visited {
        color: dark-light-choose($primary-medium, $secondary-medium);
        font-size: $font-down-1;
      }
      .badge {
        font-size: $font-down-1;
        top: -1px;
      }
    }
  }

  .topic-list-bottom {
    margin: 20px 0;
  }

  // Misc. stuff
  // --------------------------------------------------

  #list-area .top-lists h2 {
    cursor: pointer;
    margin: 5px 0 10px;
  }

  #list-area {
    h2 {
      margin: 20px 0 10px;
    }
    .show-more.has-topics {
      top: 0;
      .alert {
        padding: 12px 35px 12px 14px;
      }
    }
  }

  #bulk-select {
    position: fixed;
    right: 20px;
    top: 130px;
    padding: 5px;
    background-color: $secondary;
    z-index: z("dropdown");
  }

  button.dismiss-read {
    float: right;
    margin-bottom: 5px;
    margin-left: 10px;
  }

  .tags-admin-menu {
    .dropdown-menu {
      right: 0;
      top: 30px;
      bottom: auto;
      left: auto;
    }
  }

  .category-heading {
    clear: both;
    p {
      line-height: $line-height-large;
      font-size: $font-up-3;
    }
  }

  .category-navigation {
    clear: both;
  }

  .category-logo {
    max-height: 150px;
    float: left;
    margin-bottom: 15px;
    margin-right: 15px;
  }

  /* Tablet (portrait) ----------- */

  @media all
  and (max-width : 850px) {

    // slightly smaller font, tighten spacing on nav pills
    .nav-pills {
      > li > a {
        font-size: $font-0;
        padding: 7px 10px;
        }
    }

    // new topic just a "+" no text
    button#create-topic {
      span {
        display: none;
      }
      i {
        margin-right: 0;
      }
    }

    .topic-list {

      // tighter table header spacing
    th:first-of-type {
      padding: 12px 5px;
      }
    // smaller table cell spacing
    th, td {
        padding: 10px;
        font-size: $font-0;
      }
      .category {
        min-width: 0;
        padding: 0;
        }
      // suppress views column
      th.views {
        display: none;
      }
      td.views {
        display: none;
      }
      // reduce width for more title space
      .posts {
        width: 50px;
      }
      .posters {
        width: 30px;  
        text-align: center;      
      }
      // show only the first poster
      td.posters {
        a:not(.latest) {
          display: none;
          }
        a.latest {
          width: 100%;
          img {
            margin: 0 auto;
          }
        }
      }
    }
  }