Chatwoot/app/javascript/dashboard/assets/scss/widgets/_conv-header.scss

// Conversation header - Light BG
.conv-header {
  @include padding($space-small $space-normal);
  @include background-white;
  @include flex;
  @include flex-align($x: justify, $y: middle);
  @include border-normal-bottom;
  // Resolve Button
  .button {
    @include margin(0);
    @include flex;
  }

  .multiselect-box {
    @include flex;
    @include flex-align($x: justify, $y: middle);
    @include margin(0 $space-small);
    @include border-light;
    border-radius: $space-smaller;
    margin-right: $space-normal;

    &:before {
      line-height: 3.8rem;
      font-size: $font-size-default;
      padding-left: $space-slab;
      padding-right: $space-smaller;
      color: $medium-gray;
    }

    .multiselect {
      margin: 0;

      .multiselect__tags {
        border: 0;
      }
    }
  }

  // User thumbnail and text
  .user {
    @include flex;
    @include flex-align($x: center, $y: middle);

    .user--name {
      @include margin(0);
      font-size: $font-size-medium;
    }

    .user--profile__meta {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      justify-content: center;
      margin-left: $space-slab;
    }

    .user--profile__button {
      color: $color-woot;
      font-size: $font-size-mini;
      margin-top: $space-micro;
      cursor: pointer;
    }
  }
}

.button.resolve--button {
  > .icon {
    padding-right: $space-small;
    font-size: $font-size-default;
  }

  .spinner {
    padding: 0 $space-one;
    margin-right: $space-smaller;

    &:before {
      border-top-color: $color-white;
    }
  }
}