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

html.composer-open {
  #main-outlet {
    padding-bottom: var(--composer-height);
    transition: padding-bottom 250ms ease;
  }
}
#reply-control {
  position: fixed;
  display: flex;
  flex-direction: column;
  bottom: 0;
  height: 0;
  right: 0;
  left: 0;
  margin-left: auto;
  margin-right: auto;
  max-width: $reply-area-max-width;
  width: 100%;

  &.hide-preview {
    max-width: 740px;
  }

  .with-form-template {
    .toggle-preview,
    #mobile-file-upload,
    .submit-panel .mobile-preview {
      display: none;
    }
    .d-editor-preview-wrapper {
      display: none;
      flex: 0;
    }
  }

  @media screen and (max-width: 1200px) {
    min-width: 0;
  }
  z-index: z("composer", "content");
  transition: height 250ms ease, background 250ms ease, transform 250ms ease,
    max-width 250ms ease, padding-bottom 250ms ease;
  background-color: var(--secondary);
  box-shadow: var(--shadow-composer);

  .reply-area {
    display: flex;
    flex-direction: column;

    &.with-form-template {
      max-height: 100%;
      box-sizing: border-box;
    }
  }

  .saving-text,
  .draft-text {
    display: none;
    padding-left: 8px;

    .spinner {
      margin-left: 8px;
      border-color: var(--secondary);
      border-right-color: transparent;
    }
    .d-icon {
      color: var(--secondary);
    }
  }

  &.open {
    height: var(--composer-height);
  }

  &.closed {
    height: 0 !important;
  }

  &.draft,
  &.saving {
    height: 40px !important;
    align-items: center;
    background: var(--tertiary);
    color: var(--secondary);
    flex-direction: row;
    justify-content: space-between;

    .composer-controls {
      display: flex;
      gap: 8px;
      padding-right: 8px;

      .toggle-toolbar {
        display: none;
      }

      .d-icon {
        color: var(--secondary);
      }
    }
  }

  &.draft {
    cursor: pointer;
    display: flex;
    .draft-text {
      display: block;
    }
    .grippie,
    .saving-text {
      display: none;
    }
  }

  &.saving .saving-text {
    display: flex;
  }

  .reply-to {
    color: var(--primary-high);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: flex-end;

    .reply-details {
      flex: 1;
      display: flex;
      align-items: center;
      min-width: 0;
      white-space: nowrap;

      .d-icon {
        color: var(--primary-medium);
      }
    }
    .composer-action-title {
      display: flex;
      align-items: center;
      width: auto;
      max-width: 100%;
      min-width: 0; // allows shrinking when needed

      .action-title {
        display: flex;
        align-items: center;
        line-height: normal;
        min-width: 0;

        .topic-link,
        .user-link,
        .post-link {
          margin-right: 8px;
          @include ellipsis;
        }
      }

      .username {
        margin-right: 5px;
        max-width: 100px;
        @include ellipsis;
        @media screen and (max-width: 500px) {
          display: none;
        }
      }

      .d-icon {
        margin-right: 8px;
      }

      img.avatar {
        margin-right: 3px;
      }
    }

    .composer-controls {
      display: flex;
      gap: 8px;
      margin-left: 8px;
    }
  }

  .whisper,
  .display-edit-reason {
    font-style: italic;
  }

  .whisper {
    margin: 0 0.25em;
  }

  .unlist {
    margin-left: 0.25em;
  }

  .display-edit-reason {
    display: inline-flex;
    a {
      display: inline-flex;
    }
    .d-icon {
      padding: 0.3em 0.5em;
      color: var(--tertiary);
    }
  }

  #edit-reason {
    margin: 0 4px;
  }

  .user-selector,
  .title-and-category {
    display: flex;
    width: 100%;
    align-items: center;
    position: relative;
  }

  .user-selector {
    margin-bottom: 8px;
  }

  .title-input {
    position: relative;
    display: flex;
    flex: 1 1 50%;

    input {
      flex-grow: 1;
    }
  }

  .with-tags {
    .title-input {
      flex: 1 1 100%;
    }

    .archetype-private_message & {
      // PMs don't have categories, so we need a wider tag input
      .mini-tag-chooser {
        width: 100%;
        max-width: 100%;
      }
    }
  }

  .category-input {
    position: relative;
    display: flex;
    flex: 1 0 40%;
    max-width: 40%;
    margin: 0 0 8px 8px;

    .category-chooser {
      display: flex;
      flex: 1 0 auto;
      max-width: 100%;
      width: auto;

      &.has-selection {
        .name {
          font-size: var(--font-up-1);
        }
      }

      .select-kit-header {
        color: var(--primary-high);
        white-space: nowrap;
        text-overflow: ellipsis;
      }

      .select-kit-body {
        max-width: 450px;
      }

      .selected-name {
        max-width: 100%;
        overflow: hidden;
        .name {
          display: flex;
          max-width: 100%;
          gap: 0 0.5em;
          .badge-category {
            overflow: hidden;
          }
          // This prevents the first category from being too-truncated at the expense of a long subcategory
          > span:last-of-type:not(:first-of-type) {
            flex-shrink: 10;
          }
        }
      }
    }
  }

  .with-tags.with-category {
    .title-and-category {
      flex-wrap: wrap;
    }

    .category-input {
      margin-left: 0;
      margin-bottom: 8px;
      min-width: 0; // allows flex to shrink
      flex-wrap: wrap;
      max-width: calc(50% - 4px);
    }
  }

  .add-warning {
    color: var(--primary-high);
    padding-left: 8px;
    margin-bottom: 0;
    display: flex;

    input {
      margin-right: 8px;
    }
  }

  #reply-title {
    margin-bottom: 8px;
    flex-basis: 50%;
    width: unset;

    &:focus {
      box-shadow: none;
    }
  }

  .category-input + .tags-input {
    margin-left: 8px;
    width: auto;
    max-width: calc(50% - 4px);
  }

  .tags-input {
    position: relative;
    margin: 0 0 8px 0px;
    flex-grow: 1;
    .mini-tag-chooser {
      z-index: z("composer", "dropdown");
      width: 100%;
      .select-kit-header {
        color: var(--primary-high);
      }
    }
  }

  .wmd-controls {
    position: relative;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-height: 0;
  }

  .submit-panel {
    align-items: center;
    display: flex;
    flex-shrink: 0;
    margin-top: 8px;
  }

  .save-or-cancel {
    align-items: center;
    display: flex;
    flex: 0 1 auto;
    margin-right: 1em;

    .btn-primary {
      flex: 0 0 auto;
    }

    .cancel {
      align-items: center;
      display: flex;
      margin-left: 1.25em;
      line-height: normal;
      color: var(--primary-high);
      transition: color 250ms;

      &:hover,
      &:focus {
        outline: none;
        color: var(--danger);
      }
    }

    .preview-template {
      margin-left: 0.5rem;
    }
  }

  #draft-status,
  #file-uploading {
    color: var(--primary-high);
    margin-right: 0.5em;
  }

  #file-uploading {
    display: flex;
    align-items: center;
    margin-right: auto;
    a {
      margin-left: 0.33em;
      color: var(--primary-high);
    }
    .spinner {
      margin-right: 0.33em;
    }
  }

  #draft-status {
    margin-left: auto;
    .d-icon-user-pen {
      color: var(--danger);
      font-size: 20px;
      vertical-align: -5.5px;
    }
    + .btn-mini-toggle {
      margin-left: 0;
    }
  }

  .composer-select-form-template {
    margin-bottom: 8px;
    width: 100%;

    .name,
    .formatted-selection,
    .d-icon {
      color: var(--primary-high);
    }
  }
}

.autocomplete {
  z-index: z("composer", "dropdown") + 1;
  position: absolute;
  max-width: 370px;
  min-width: 300px;
  background-color: var(--secondary);
  border: 1px solid var(--primary-low);
  box-shadow: var(--shadow-dropdown);
  border-radius: 8px;

  ul {
    list-style: none;
    padding: 0;
    margin: 0;

    li {
      &:first-of-type a {
        border-top-left-radius: 8px;
        border-top-right-radius: 8px;
      }
      &:last-of-type a {
        border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px;
      }
      a {
        @include ellipsis;
        align-items: center;
        color: var(--primary);
        display: flex;
        gap: 0.25em;
        padding: 0.3em 1em;

        @include hover {
          background-color: var(--d-hover);
          text-decoration: none;
        }

        &.selected {
          background-color: var(--d-selected);

          .username,
          .name,
          .emoji-shortname {
            font-weight: bold;
          }
        }

        .avatar {
          margin-right: 0.25em;
        }

        .name {
          display: contents;
          font-size: var(--font-down-1);
          color: var(--primary-high);
        }

        .user-status-message {
          display: flex;
          align-items: center;
          gap: 0.25em;

          .user-status-message-description {
            @include ellipsis;
            font-size: var(--font-down-2);
            color: var(--primary-high);
            margin: 0;
          }
        }

        .relative-date {
          font-size: var(--font-down-3);
        }
      }

      .d-icon-users {
        color: var(--primary-medium);
        padding: 0 2px;
      }
    }
  }

  &.ac-user {
    li a {
      padding: 0.5em 1em;
    }
    .emoji {
      height: 0.75em;
      width: 0.75em;
    }
  }

  &.ac-emoji {
    li:last-of-type a {
      color: var(--primary-high);
    }
    .emoji {
      margin-right: 0.25em;
    }
  }
}

div.ac-wrap.disabled {
  input {
    display: none;
  }
  .item a {
    display: none;
  }
}

div.ac-wrap div.item a.remove,
.remove-link {
  margin-left: 4px;
  font-size: var(--font-down-1);
  line-height: var(--line-height-small);
  padding: 1px 3.5px;
  border-radius: 12px;
  box-sizing: border-box;
  border: 1px solid var(--primary-low);
  &:hover {
    background-color: var(--danger-low);
    border: 1px solid var(--danger-medium);
    text-decoration: none;
    color: var(--danger);
  }
}

div.ac-wrap {
  max-height: 150px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  min-height: 30px;
  box-sizing: border-box;
  div.item {
    float: left;
    padding: 4px 10px;
    line-height: var(--line-height-large);
    span {
      display: inline-block;
      line-height: var(--line-height-medium);
    }
  }

  .ac-collapsed-button {
    float: left;
    border-radius: 20px;
    position: relative;
    top: -2px;
    margin-right: 10px;
  }

  input[type="text"] {
    float: left;
    &.fullwidth-input {
      width: 100%;
    }
  }
}

.md-table {
  overflow-y: auto;
  margin: 1em 0;
  .mobile-view & {
    table {
      width: 100%;
    }
  }
}

@keyframes transformer {
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

body.ios-safari-composer-hacks {
  #main-outlet,
  header,
  .grippie,
  html:not(.fullscreen-composer) & .toggle-fullscreen {
    display: none;
  }

  #reply-control {
    top: 0px;
    &.open {
      height: calc(var(--composer-vh, 1vh) * 100);
    }
  }
}

body:not(.ios-safari-composer-hacks) {
  #reply-control.open {
    --min-height: 255px;
    min-height: var(--min-height);
    max-height: calc(100vh - var(--header-offset, 4em));
    &.composer-action-reply {
      // we can let the reply composer get a little shorter
      min-height: calc(var(--min-height) - 4em);
    }
    padding-bottom: var(--composer-ipad-padding);
    box-sizing: border-box;
  }
}

.toggle-preview {
  margin-left: auto;
  transition: all 0.33s ease-out;

  &.active {
    transform: rotate(180deg);
  }

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

.draft-error {
  color: var(--danger);
}