discourse/plugins/chat/assets/stylesheets/mobile/chat-channel-row.scss

:root {
  --channel-list-avatar-size: 43px;
}
.chat-channel-row {
  margin: 0;
  border-radius: 0;
  border-bottom: 1px solid var(--primary-low);
  transition: height 0.25s ease-in-out, opacity 0.25s ease-out;
  transform-origin: top center;
  will-change: height, opacity, left;
  position: relative;
  height: 4em;

  &.-fade-out {
    .chat-channel-row__content {
      background-color: var(--danger-low);
    }

    height: 0 !important;
    overflow: hidden;
    opacity: 0.5 !important;
  }

  &__content {
    padding-inline: 1.5rem;
    padding-block: 0.5rem;
    z-index: 2;
    box-sizing: border-box;
    transition: border-radius 0.25s ease-in-out;
    //for sliding delete animation
    background: var(--primary-very-low);
    height: 100%;

    &.-animate-reset {
      transition: margin-right 0.15s ease-out;
      margin-right: 0px !important;
    }
    &:not(.-animate-reset) {
      border-top-right-radius: 0.25rem;
      border-bottom-right-radius: 0.25rem;
    }
  }

  &__info {
    .is-category & {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-grow: 1;
    }
    .is-dm & {
      display: grid;
      grid-template-areas:
        "name metadata"
        "msg msg";
      width: 100%;
      align-items: center;
      &:has(.chat-channel-unread-indicator) {
        grid-template-areas:
          "name metadata"
          "msg metadata";
      }
    }
  }

  &__action-btn {
    z-index: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    position: absolute;
    top: 0px;
    bottom: 0px;
    right: 0px;
    left: 0px;
    background: var(--danger);
    color: var(--primary-very-low);

    .d-icon {
      transform-origin: 50% 50%;
      transform-box: fill-box;
      transition: scale 0.2s ease-out;
      margin-inline: 0 1.5rem;
    }

    &.-not-at-threshold {
      .d-icon {
        scale: 0.7;
      }
    }

    &.-at-threshold {
      .d-icon {
        scale: 1.5;
      }
    }
  }

  .chat-channel {
    &__user-info,
    &__channel-info {
      grid-area: name;
    }
    &__metadata {
      grid-area: metadata;
      .chat-channel-unread-indicator {
        font-size: var(--font-down-2);
        margin-top: 0.25rem;
      }
    }
    &__metadata-date {
      font-size: var(--font-down-2);
    }
    &__last-message {
      @include ellipsis;
      grid-area: msg;
      font-size: var(--font-down-1-rem);
      color: var(--primary-high);
    }
  }

  .chat-channel-icon {
    &.--users-count {
      font-size: var(--font-up-2);
    }
  }
}