discourse/app/assets/stylesheets/common/components/user-stream-item.scss

// Common styles for "user-stream-item" component
.user-stream {
  // DEPRECATED:
  // The ".item" class should be removed because it's too generic.
  // Once ".item" has been removed, ".user-stream-item" can replace
  // ".user-stream" as the top-level selector on this file as all other
  // selectors below are its children
  .item,
  .user-stream-item {
    background-color: $secondary;
    border-bottom: 1px solid $primary-low;

    &.moderator-action {
      background-color: $highlight-medium;
    }

    &.deleted {
      opacity: 0.8;
      background-color: dark-light-diff(
        rgba($danger, 0.7),
        $secondary,
        50%,
        -10%
      );
    }

    &.hidden {
      display: block;
      opacity: 0.4;
    }
  }

  .type,
  span.name {
    color: $primary;
  }

  .time,
  .delete-info {
    display: block;
    float: right;
    color: lighten($primary, 40%);
    font-size: $font-down-2;
  }

  .delete-info i {
    font-size: $font-0;
  }

  .expand-item,
  .collapse-item {
    float: right;
    margin-right: 0.5em;
    line-height: $line-height-small;
    color: lighten($primary, 40%);
  }

  .avatar-link {
    float: left;
    margin-right: 4px;
  }

  .title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
  }

  .name {
    font-size: $font-0;
    max-width: 400px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .edit-reason {
    background-color: dark-light-choose(
      $highlight-medium,
      scale-color($highlight, $lightness: -50%)
    );
    padding: 3px 5px 5px 5px;
  }

  .remove-bookmark {
    float: right;
    margin-top: -4px;
  }

  .notification {
    li {
      display: inline-block;
    }

    p {
      display: inline-block;
      span {
        color: $primary;
      }
    }

    .time {
      display: inline-block;
      margin-left: 10px;
      float: none;
    }

    // common/base/header.scss
    .fa,
    .icon {
      color: dark-light-choose($primary-medium, $secondary-medium);
      font-size: $font-up-4;
    }
  }

  .excerpt {
    margin: 5px 0;
    font-size: $font-0;
    word-wrap: break-word;
    color: $primary;

    details.disabled {
      color: $primary-medium;
    }
  }

  .group-member-info {
    display: flex;
  }
}

.user-stream .child-actions, /* DEPRECATED: '.user-stream .child-actions' selector*/
.user-stream-item-actions {
  margin-top: 8px;

  .avatar-link {
    float: none;
    margin-right: 3px;
  }

  .fa {
    width: 15px;
    display: inline-block;
    color: $primary;
  }
}