discourse/plugins/chat/assets/stylesheets/common/chat-drawer.scss

body.composer-open .chat-drawer-outlet-container {
  bottom: 11px; // prevent height of grippie from obscuring ...is typing indicator
}

.chat-drawer-outlet-container {
  font-family: "Lato", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  // higher than timeline, lower than composer, lower than user card (bump up below)
  z-index: z("usercard");
  position: fixed;
  right: var(--composer-right, 20px);
  left: 0;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  pointer-events: none !important;
  bottom: 0;

  > * {
    pointer-events: auto;
  }

  .no-channel-title {
    font-weight: bold;
    margin-left: 0.5rem;
  }

  &.composer-draft-collapsed {
    bottom: 40px;
  }

  box-sizing: border-box;
  max-height: 90vh;
  padding-bottom: var(--composer-height, 0);
  transition: all 100ms ease-in;
  transition-property: bottom, padding-bottom;

  .channels-list {
    .chat-channel-row {
      height: 3.6em;
      padding: 0 0.5rem;
      margin: 0 0 0 0.5rem;

      &:not(:last-of-type) {
        border-bottom: 1px solid var(--primary-low);
      }
    }
  }
}

.chat-drawer {
  align-self: flex-end;

  .chat-drawer-container {
    background: var(--secondary);
    border: 1px solid var(--primary-low);
    border-bottom: 0;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    box-shadow: 0px 0px 4px rgba(0, 0, 0, 0.125);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
  }

  &.is-expanded {
    .chat-drawer-container {
      max-height: $float-height;
      height: calc(85vh - var(--composer-height, 0px));
    }
  }

  .chat-live-pane {
    height: 100%;
  }
}

.chat-drawer-header__left-actions {
  display: flex;
  height: 100%;
}

.chat-drawer-header__right-actions {
  display: flex;
  height: 100%;
  margin-left: auto;
}

.chat-drawer-header__top-line {
  height: 2.5rem;
  display: flex;
  align-items: center;
}

.chat-drawer-header__bottom-line {
  height: 1.5rem;
  display: flex;
  align-items: start;
}

.chat-drawer-header__title {
  @include ellipsis;
  display: flex;
  flex-direction: column;
  width: 100%;
  font-weight: 700;
  padding: 0 0.5rem 0 1rem;
  cursor: pointer;

  .chat-channel-title {
    padding: 0;
  }
}

.chat-drawer-header {
  box-sizing: border-box;
  border-bottom: solid 1px var(--primary-low);
  border-radius: 8px 8px 0 0;
  background: var(--primary-very-low);
  width: 100%;
  display: flex;
  align-items: flex-start;

  .btn {
    height: 100%;
  }

  .chat-channel-title {
    font-weight: 700;
    width: 100%;

    .chat-name,
    .chat-drawer-name,
    .category-chat-name,
    .dm-usernames {
      color: var(--primary);
    }
    .category-chat-badge,
    .chat-drawer-badge {
      display: flex;
      justify-content: center;
      align-content: center;
      .d-icon:not(.d-icon-lock) {
        width: 1.25em;
        height: 1.25em;
      }
    }
    .category-chat-private .d-icon {
      background-color: var(--primary-very-low);
    }
    .badge-wrapper.bullet {
      margin-right: 0px;
    }
    .dm-usernames {
      max-width: 100%;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .d-icon:not(.d-icon-hashtag) {
      color: var(--primary-high);
    }
    .category-hashtag {
      padding: 2px 4px;
    }
  }

  &__close-btn,
  &__return-to-channels-btn,
  &__full-screen-btn,
  &__expand-btn {
    max-height: 2.5rem;
    height: 100%;
    min-width: 40px;
    width: 40px;
    display: flex;
    justify-content: center;
    align-items: center;

    .d-icon {
      color: var(--primary-low-mid);
    }

    &:visited {
      .d-icon {
        color: var(--primary-low-mid);
      }
    }

    &:focus {
      outline: none;
      background: none;

      .d-icon {
        background: none;
        color: var(--primary-low-mid);
      }
    }

    &:hover {
      .d-icon {
        color: var(--primary-high);
      }
    }
  }
}

.chat-drawer-content {
  box-sizing: border-box;
  height: 100%;
  min-height: 1px;
  padding-bottom: 0.25em;

  .channels-list .chat-channel-divider {
    padding: 1.5rem 0.5rem 1rem 1rem;
    color: var(--quaternary);
  }
}