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

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

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

.list-controls {
  .nav {
    float: left;
    margin-bottom: 10px;
  }

  .btn {
    float: right;
    margin-left: 8px;
    margin-bottom: 9px;
    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-thumbtack {
    color: dark-light-choose($primary-medium, $secondary-medium);
  }
  .d-icon-thumbtack.unpinned {
    color: dark-light-choose($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);
    }
  }

  button.bulk-select {
    padding: 0;
  }

  td.bulk-select {
    padding: 10px;
    width: 30px;
    + .main-link {
      padding-left: 0;
    }
  }

  .badge-notification {
    position: relative;
    top: -2px;
    &.new-topic {
      top: -1px;
      padding-left: 5px;
    }
  }

  $td-posters-height: 29px; // min-height of td with avatar glow
  $td-posters-more-lh: $td-posters-height - 4;

  .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;
      }

      &.posters-more-count {
        cursor: default;
        color: dark-light-choose($primary-medium, $secondary-medium);
        line-height: $td-posters-more-lh;
        font-size: $font-down-1;
      }
    }
  }
  td.posters {
    height: $td-posters-height;
  }
  .posters a:first-child .avatar.latest:not(.single) {
    box-shadow: 0 0 3px 1px desaturate($tertiary-medium, 35%);
    border: 2px solid desaturate($tertiary-medium, 40%);
    position: relative;
    top: -2px;
    left: -2px;
  }

  .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-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-container {
  @supports (position: sticky) {
    @media screen and (min-width: 1250px) {
      position: sticky;
      position: -webkit-sticky;
    }
  }
}

#bulk-select {
  position: fixed;
  right: 20px;
  top: 130px;
  background-color: $secondary;
  z-index: z("dropdown");
  @supports (position: sticky) {
    @media screen and (min-width: 1250px) {
      body:not(.search-page) & {
        position: absolute;
        right: -60px;
        top: 0;
      }
    }
  }
}

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

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

.category-navigation {
  clear: both;
}

.category-logo.aspect-image {
  float: left;
  margin: 0.25em 1em 0.5em 0;

  img {
    width: auto;
    max-height: 150px;
  }
}

@supports (--custom: property) {
  .category-logo.aspect-image {
    --max-height: 150px;
    max-height: var(--max-height);
    max-width: 60%;
    height: auto;
    width: calc(var(--max-height) * var(--aspect-ratio));

    img {
      width: 100%;
      height: inherit;
      max-width: initial;
      max-height: initial;
    }
  }
}

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

@include breakpoint(medium) {
  // 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;
    }
    .d-icon {
      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;
    }
    // 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;
        }
      }
    }
  }
}