discourse/plugins/chat/assets/stylesheets/common/chat-message-thread-indicator.scss

.chat-message-thread-indicator {
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  grid-area: threadindicator;
  max-width: 1000px;
  background-color: var(--primary-very-low);
  margin: 4px 0 -2px calc(var(--message-left-width) - 0.25rem);
  padding-block: 0.5rem;
  padding-inline: 0.5rem;
  border-radius: 8px;
  color: var(--primary);

  > * {
    pointer-events: none;
  }

  &:visited,
  &:hover {
    color: var(--primary);
  }

  .touch & {
    &.-active {
      box-shadow: var(--shadow-dropdown);
    }
  }

  .no-touch & {
    &:hover {
      box-shadow: var(--shadow-dropdown);
    }
  }

  &__participants {
    flex-shrink: 0;
    align-self: flex-start;
  }

  &__last-reply-avatar {
    align-self: flex-start;
    .chat-user-avatar {
      width: auto !important;
    }
  }

  &__last-reply-metadata {
    display: flex;
    align-items: flex-end;
    gap: 0.25rem;
    color: var(--primary-medium);

    .separator {
      font-size: var(--font-down-1);
    }
  }

  &__last-reply-container {
    display: inline-flex;
    align-items: flex-end;
    font-size: var(--font-down-1);
    min-width: 0;

    .relative-date {
      @include ellipsis;
    }
  }

  &__last-reply-user {
    font-weight: bold;
    color: var(--secondary-low);
  }

  &__last-reply-username {
    font-weight: bold;
    color: var(--secondary-low);
  }

  &__last-reply-excerpt {
    @include ellipsis;
    line-height: 1.8rem;
  }

  &__body {
    overflow: hidden;
    white-space: nowrap;
    flex-shrink: 1;
  }

  &:hover {
    .chat-message-thread-indicator__replies-count {
      text-decoration: underline;
    }
  }

  &__replies-count {
    @include ellipsis;
    color: var(--tertiary);
    font-size: var(--font-down-1);
  }
}