discourse/app/assets/stylesheets/common/base/share_link.scss

// styles that apply to the "share" popup when sharing a link to a post or topic

#share-link {
  position: absolute;
  left: 20px;
  z-index: z("dropdown");
  box-shadow: shadow("card");
  background-color: $secondary;
  padding: 6px 10px 10px 10px;
  width: 300px;
  display: none;
  &.visible {
    display: block;
  }
  input[type=text] {
    width: 96%;
  }
  .share-for-touch .overflow-ellipsis {
    clear: both;
  }
  .share-for-touch {
    margin: 14px 0;
  }
  h3 {
    font-size: $font-0;
  }
  .copy-text {
    display: inline-block;
    position: absolute;
    margin: 5px 5px 5px 15px;
    color: $success;
    opacity: 1;
    transition: opacity 0.25s;
    font-size: $font-0;
    &:not(.success) {
      opacity: 0;
    }
  }
  .social-link {
    margin-left: 2px;
    margin-right: 8px;
    float: left;
    font-size: $font-up-4;
  }
  .reply-as-new-topic {
    float: left;
    line-height: $line-height-large;
    margin-left: 8px;
    margin-top: .5em;
    .fa {
      margin-right: 5px;
    }
  }
  .link {
    margin-right: 2px;
    float: right;
    font-size: $font-up-3;
    a {
      color: dark-light-choose($primary-medium, $secondary-medium);
    }
  }

  h3 {
    margin: 5px 0;
    float: left;
  }

  .date {
    float: right;
    margin: 5px;
    color: dark-light-choose($primary-medium, $secondary-medium);
  }

  input[type=text] {
    font-size: $font-up-1;
    margin-bottom: 10px;
  }
}

.discourse-no-touch #share-link .share-for-touch {
  display: none;
}

.discourse-touch #share-link input[type=text] {
  display: none;
}