Overleaf/services/web/frontend/stylesheets/app/editor/review-panel.less

@rp-base-font-size: 12px;
@rp-small-font-size: 10px;
@rp-icon-large-size: 18px;

@rp-bg-blue: #dadfed;
@rp-bg-dim-blue: #fafafa;
@rp-highlight-blue: #8a96b5;

@rp-border-grey: #d9d9d9;

@rp-green: #2c8e30;
@rp-green-on-dark: rgba(37, 107, 41, 0.5);
@rp-red: #c5060b;
@rp-yellow: #f3b111;
@rp-yellow-on-dark: rgba(194, 93, 11, 0.5);
@rp-grey: #aaaaaa;

@rp-type-blue: #6b7797;
@rp-type-darkgrey: #3f3f3f;

@rp-entry-ribbon-width: 4px;
@rp-entry-arrow-width: 6px;
@rp-semibold-weight: 600;
@review-panel-width: 230px;
@review-off-width: 22px;

@rp-toolbar-height: 32px;

@rp-entry-animation-speed: 0.3s;

.rp-button() {
  display: block; // IE doesn't do flex with inline items.
  background-color: @rp-highlight-blue;
  color: #fff;
  text-align: center;
  line-height: 1.3;
  user-select: none;
  border: 0;

  &:hover,
  &:focus {
    outline: 0;
    background-color: darken(@rp-highlight-blue, 5%);
    text-decoration: none;
    color: #fff;
  }

  &[disabled] {
    background-color: tint(@rp-highlight-blue, 50%);

    &:hover,
    &:focus {
      background-color: tint(@rp-highlight-blue, 50%);
    }
  }
}

.rp-collapse-arrow() {
  display: inline-block;
  transform: rotateZ(0deg);
  transition: transform 0.15s ease;
  &-on {
    transform: rotateZ(-90deg);
  }
}

#review-panel {
  display: block;
  .rp-size-expanded & {
    display: flex;
    flex-direction: column;
    width: @review-panel-width;
    overflow: visible;
    border-left-width: 1px;
  }
  .rp-size-mini & {
    width: @review-off-width;
    z-index: 6;
    border-left-width: 1px;
  }

  position: absolute;
  top: 32px;
  bottom: 0px;
  right: 0px;
  background-color: @rp-bg-blue;
  border-left: solid 0px @rp-border-grey;
  font-size: @rp-base-font-size;
  color: @rp-type-blue;
  z-index: 6;
}

.loading-panel {
  .rp-size-expanded & {
    right: @review-panel-width;
  }
}

.review-panel-toolbar {
  display: none;
  .rp-size-expanded & {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5px;
  }

  .rp-unsupported & {
    display: none;
  }

  position: relative;
  border-bottom: 1px solid @rp-border-grey;
  background-color: @rp-bg-dim-blue;
  text-align: center;
  z-index: 3;
  flex-basis: 32px;
  flex-shrink: 0;
}
.review-panel-toolbar-label {
  cursor: pointer;
  text-align: right;
  flex-grow: 1;
}
.review-panel-toolbar-icon-on {
  margin-right: 5px;
  color: @red;
}
.review-panel-toolbar-label-disabled {
  cursor: auto;
  margin-right: 5px;
}
.review-panel-toolbar-spinner {
  margin-left: 5px;
}
.rp-tc-state {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  overflow: hidden;
  list-style: none;
  padding: 0 5px;
  margin: 0;
  border-bottom: 1px solid @rp-border-grey;
  background-color: @rp-bg-dim-blue;
  text-align: left;
}
.rp-tc-state-collapse {
  .rp-collapse-arrow;
  margin-left: 5px;
}
.rp-tc-state-item {
  display: flex;
  align-items: center;
  padding: 3px 0;
  &:last-of-type {
    padding-bottom: 5px;
  }
}
.rp-tc-state-separator {
  border-bottom: 1px solid @rp-border-grey;
}
.rp-tc-state-item-everyone {
  border-bottom: 1px solid @rp-border-grey;
  color: @red;
}
.rp-tc-state-item-name {
  flex-grow: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: @rp-semibold-weight;
}
.rp-tc-state-item-name-disabled {
  opacity: 0.35;
}
.rp-tc-state-item-guests {
  color: @blue;
}

.rp-entry-list {
  display: none;
  width: 100%;

  .rp-size-expanded &,
  .rp-size-mini & {
    display: block;
  }

  .rp-unsupported & {
    display: none;
  }

  .rp-state-current-file & {
    position: absolute;
    top: 0;
    bottom: 0;
    padding-bottom: 52px;
    overflow-y: hidden;
  }

  .rp-state-current-file.rp-size-mini .rp-collapsed-displaying-entry & {
    overflow-y: visible;
  }

  .rp-state-overview & {
    flex-grow: 2;
    overflow-y: auto;
  }
}

.rp-entry-list-inner {
  position: relative;
}

.rp-entry-indicator {
  display: none;
  z-index: 2; // above .review-panel-toggler
  .rp-size-mini & {
    display: block;
  }
  .rp-size-mini &-add-comment {
    display: none;
  }
  position: absolute;
  left: 2px;
  right: 2px;
  text-align: center;
  background-color: @rp-highlight-blue;
  border-radius: 3px;
  color: #fff;
  cursor: pointer;
  transition: top @rp-entry-animation-speed, left 0.1s, right 0.1s;
  .no-animate & {
    transition: none;
  }

  &-focused {
    left: 0px;
    right: 4px;
    z-index: 1;
  }
}

.rp-entry-wrapper {
  &:hover .rp-entry-insert,
  &:hover .rp-entry-delete,
  &:hover .rp-entry-aggregate,
  &:hover .rp-entry-comment {
    display: block;
  }

  &.rp-entry-hidden {
    display: none;
  }
}

.rp-entry {
  .rp-state-current-file & {
    position: absolute;
    width: @review-panel-width;
  }
  .rp-state-current-file-mini & {
    display: none;
    left: @review-off-width + @rp-entry-arrow-width;
    box-shadow: 0 0 10px 5px rgba(0, 0, 0, 0.2);
    z-index: 1;

    &::before {
      content: '';
      position: absolute;
      top: -(@review-off-width + @rp-entry-arrow-width);
      right: -(@review-off-width + @rp-entry-arrow-width);
      bottom: -(@review-off-width + @rp-entry-arrow-width);
      left: -(2 * @rp-entry-arrow-width + 2);
      z-index: -1;
    }
    &::after {
      .triangle(
        left,
        @rp-entry-arrow-width,
        @rp-entry-arrow-width * 1.5,
        inherit
      );
      top: (@review-off-width / 2) - @rp-entry-arrow-width;
      left: -(@rp-entry-ribbon-width + @rp-entry-arrow-width);
      content: '';
    }
  }
  .rp-state-current-file-mini.rp-layout-left & {
    left: auto;
    right: @review-off-width + @rp-entry-arrow-width;
    border-left-width: 0;
    border-right-width: @rp-entry-ribbon-width;
    border-right-style: solid;

    &::before {
      left: -(@review-off-width + @rp-entry-arrow-width);
      right: -(2 * @rp-entry-arrow-width + 2);
    }
    &::after {
      .triangle(
        right,
        @rp-entry-arrow-width,
        @rp-entry-arrow-width * 1.5,
        inherit
      );
      right: -(@rp-entry-ribbon-width + @rp-entry-arrow-width);
      left: auto;
    }
  }
  .rp-state-current-file-expanded & {
    visibility: hidden;
    left: 5px;
    right: 5px;
    width: auto;

    &-focused {
      left: -2px;
      right: 12px;
      z-index: 1;
    }

    &-add-comment {
      right: auto;

      &.rp-entry-adding-comment {
        right: 5px;
      }
    }
    &-bulk-actions {
      right: auto;
    }
  }
  .rp-state-overview & {
    border-radius: 0;
    border-bottom: solid 1px @rp-border-grey;
    cursor: pointer;
  }
  .resolved-comments-dropdown & {
    position: static;
    margin-bottom: 5px;
  }

  border-left: solid @rp-entry-ribbon-width transparent;
  border-radius: 3px;
  background-color: #fff;
  transition: top @rp-entry-animation-speed, left 0.1s, right 0.1s;
  .no-animate & {
    transition: none;
  }

  &-insert,
  &-aggregate {
    border-color: @rp-green;
  }

  &-delete {
    border-color: @rp-red;
  }

  &-comment {
    border-color: @rp-yellow;
  }

  &-comment-resolving {
    top: 4px;
    left: 6px;
    opacity: 0;
    z-index: 3;
    transform: scale(0.1);
    transform-origin: 0 0;
    transition: top 0.35s ease-out, left 0.35s ease-out,
      transform 0.35s ease-out, opacity 0.35s ease-out 0.2s;
  }

  &-comment-resolved {
    border-color: @rp-grey;
    background-color: #efefef;
  }

  &-add-comment {
    background-color: transparent;
    right: auto;
    border-left-width: 0;

    &.rp-entry-adding-comment {
      background-color: #fff;
      right: 5px;
      border-left-width: 3px;
      border-left-color: @rp-yellow;
    }
  }

  &-bulk-actions {
    background-color: transparent;
    right: auto;
    border-left-width: 0;
  }
}
.rp-entry-body {
  display: flex;
  align-items: center;
  padding: 4px 5px;
}
.rp-entry-action-icon {
  font-size: @rp-icon-large-size;
  padding: 0 3px;
  line-height: 0;

  .rp-state-overview & {
    display: none;
  }
}

.rp-entry-details {
  line-height: 1.4;
  margin-left: 5px;
  // We need to set any low-enough flex base size (0px), making it growable (1) and non-shrinkable (0).
  // This is needed to ensure that IE makes the element fill the available space.
  flex: 1 0 1px;
  overflow-x: auto;

  .rp-state-overview & {
    margin-left: 0;
  }
}

.rp-entry-metadata {
  font-size: @rp-small-font-size;
}
.rp-entry-user {
  font-weight: @rp-semibold-weight;
  font-style: normal;
}
.rp-comment-actions {
  a {
    color: @rp-type-blue;
  }
}

.rp-content-highlight {
  color: @rp-type-darkgrey;
  font-weight: @rp-semibold-weight;
  text-decoration: none;

  del& {
    text-decoration: line-through;
  }
}

.rp-entry-actions {
  display: flex;

  .rp-state-overview .rp-entry-list & {
    display: none;
  }
}
.rp-entry-button {
  .rp-button();
  flex: 1 1 50%;
  border-right: solid 1px #fff;
  padding: 2px 0;

  &:last-child {
    border-bottom-right-radius: 3px;
    border-right-width: 0;
  }

  .rp-state-current-file-mini.rp-layout-left & {
    &:first-child {
      border-bottom-left-radius: 3px;
    }
    &:last-child {
      border-bottom-right-radius: 0;
    }
  }
}

.rp-comment {
  margin: 2px 5px;
  padding-bottom: 3px;
  line-height: 1.4;
  border-bottom: solid 1px @rp-border-grey;

  &:last-child {
    margin-bottom: 2px;
    border-bottom-width: 0;
  }

  .rp-state-overview .rp-entry-list & {
    margin: 4px 5px;

    &:first-child {
      margin-top: 0;
      padding-top: 4px;
    }
  }
}
.rp-comment-content {
  margin: 0;
  color: @rp-type-darkgrey;
  overflow-x: auto; // Long words, like links can overflow without this.
  white-space: pre-wrap;
}

.rp-comment-resolver {
  color: @rp-type-blue;
}
.rp-comment-resolver-content {
  font-style: italic;
  margin: 0;
}

.rp-comment-reply {
  padding: 0 5px;
}

.rp-add-comment-btn,
.rp-bulk-actions-btn {
  .rp-button();
  display: inline-block;
  padding: 5px 10px;
  border-radius: 3px;

  .rp-in-editor-widgets & {
    display: block;
    white-space: nowrap;
    border-radius: 0;

    &:last-child {
      border-bottom-left-radius: 3px;
    }
  }
}

.rp-bulk-actions-btn {
  border-radius: 0;
  &:first-child {
    border-top-left-radius: 3px;
    border-bottom-left-radius: 3px;
  }
  &:last-child {
    border-top-right-radius: 3px;
    border-bottom-right-radius: 3px;
    margin-left: 1px;
  }
}

.rp-new-comment {
  padding: 5px;
}

.rp-comment-input {
  width: 100%;
  font-size: @rp-base-font-size;
  padding: 2px 5px;
  border-radius: 3px;
  border: solid 1px @rp-border-grey;
  resize: vertical;
  color: @rp-type-darkgrey;
  background-color: #fff;
  margin-top: 3px;
  overflow-x: hidden;
  min-height: 3em;
  max-height: 400px;
}

.rp-icon-delete {
  display: inline-block;
  line-height: 1;
  font-style: normal;
  font-size: 0.8em;
  text-decoration: line-through;
  font-weight: @rp-semibold-weight;
  &::before {
    content: 'Ab';
  }
}

.rp-resolved-comment {
  border-left: solid @rp-entry-ribbon-width @rp-yellow;
  border-radius: 3px;
  background-color: #fff;
  margin-bottom: 5px;
}
.rp-resolved-comment-context {
  background-color: lighten(@rp-yellow, 35%);
  padding: 4px 5px;
}
.rp-resolved-comment-context-file {
  font-weight: @rp-semibold-weight;
}

.rp-resolved-comment-context-quote {
  color: #000;
  font-family: @font-family-monospace;
  margin: 0;
}

.rp-entry-callout {
  transition: top @rp-entry-animation-speed, height @rp-entry-animation-speed;
  .rp-state-current-file & {
    position: absolute;
    border-top: 1px solid grey;
    border-right: 1px dashed grey;
    &::after {
      content: '';
      position: absolute;
      top: -1px;
      left: 3px;
      bottom: 0;
      border-bottom: 1px solid grey;
    }
  }
  .rp-state-current-file-expanded & {
    width: 3px;
    &::after {
      width: 3px;
    }
  }
  .rp-state-current-file-mini & {
    width: 1px;
    &::after {
      width: 1px;
    }
  }

  .rp-state-overview & {
    display: none;
  }

  .rp-state-current-file &-inverted {
    border-top: none;
    border-bottom: 1px solid grey;
    &::after {
      top: 0px;
      bottom: -1px;
      border-top: 1px solid grey;
      border-bottom: none;
    }
  }

  .rp-state-current-file &-insert {
    border-color: @rp-green;
    &::after {
      border-color: @rp-green;
    }
  }

  .rp-state-current-file &-delete {
    border-color: @rp-red;
    &::after {
      border-color: @rp-red;
    }
  }

  .rp-state-current-file &-comment {
    border-color: @rp-yellow;
    &::after {
      border-color: @rp-yellow;
    }
  }

  .rp-size-mini &-add-comment {
    display: none;
  }
}

.rp-overview-file-header {
  padding: 2px 5px;
  border-top: solid 1px @rp-border-grey;
  border-bottom: solid 1px @rp-border-grey;
  background-color: @rp-bg-dim-blue;
  margin-top: 10px;
  font-weight: @rp-semibold-weight;
  text-align: center;
  cursor: pointer;
}

.rp-overview-file-num-entries {
  font-weight: normal;
  font-size: 0.9em;
}
.rp-overview-file-header-collapse {
  .rp-collapse-arrow;
  float: left;
}
.rp-overview-file-entries {
  overflow: hidden;
}

.rp-comment-wrapper {
  transition: 0.35s opacity ease-out 0.2s;

  &-resolving {
    opacity: 0;
  }
}

.rp-loading,
.rp-empty {
  text-align: center;
  padding: 5px;
}

.rp-nav {
  display: none;
  flex-shrink: 0;
  .rp-size-expanded & {
    display: flex;
  }

  .rp-unsupported & {
    display: none;
  }

  .rp-state-current-file & {
    position: absolute;
    bottom: 0;
  }
  width: 100%;
  font-size: @rp-icon-large-size;
  text-align: center;
  background-color: @rp-bg-dim-blue;
  border-top: solid 1px @rp-border-grey;
  z-index: 2;
}
.rp-nav-item {
  display: block;
  color: lighten(@rp-type-blue, 25%);
  flex: 0 0 50%;
  border-top: solid 3px transparent;
  padding-bottom: 2px;

  &:hover,
  &:focus {
    text-decoration: none;
    color: @rp-type-blue;
  }

  &-active {
    color: @rp-type-blue;
    border-top: solid 3px @rp-highlight-blue;
  }
}
.rp-nav-label {
  display: block;
  font-size: @rp-base-font-size;
}

#editor {
  .rp-size-mini & {
    right: @review-off-width;
    .ace-editor-body {
      overflow: visible;
      .ace_scrollbar-v {
        right: -@review-off-width;
      }
    }
  }

  .rp-size-expanded & {
    right: @review-panel-width;
    left: 0px;
    width: auto;
  }

  .rp-state-current-file-expanded & {
    .ace-editor-body {
      overflow: visible;
      .ace_scrollbar-v {
        right: -@review-panel-width;
      }
    }
  }
}

#editor-rich-text {
  .rp-size-expanded & {
    right: @review-panel-width;
  }
}

.rp-toggle {
  display: inline-block;
  vertical-align: middle;
  padding-left: 5px;
}
.rp-toggle-hidden-input {
  display: none;

  + .rp-toggle-btn {
    display: block;
    width: 3.5em;
    height: 1.75em;
    position: relative;
    outline: 0;
    margin: 0;
    font-weight: normal;
    cursor: pointer;
    user-select: none;
    padding: 1px;
    background-color: @rp-highlight-blue;
    border: 1px solid #fff;
    border-radius: 0.875em;
    transition: background 0.15s ease, border-color 0.15s ease;

    &::before {
      content: '';
      display: block;
      width: 50%;
      height: 100%;
      position: relative;
      left: 0;
      background-color: #fff;
      border-radius: 0.875em;
      transition: background-color 0.15s ease, color 0.15s ease, left 0.15s ease;
    }
  }

  &:checked + .rp-toggle-btn {
    background-color: @red;
    border-color: #fff;

    &::before {
      left: 50%;
      background-color: #fff;
    }
  }

  &:disabled + .rp-toggle-btn {
    cursor: default;
    opacity: 0.35;
  }
}

.rp-unsupported-msg-wrapper {
  display: none;
  .rp-size-expanded.rp-unsupported & {
    display: block;
  }

  height: 100%;

  .rp-unsupported-msg {
    display: flex;
    width: @review-panel-width - 40px;
    height: 100%;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 0 auto;
    text-align: center;

    .rp-unsupported-msg-title {
      font-size: 1.3em;
      margin-top: 13px;
    }
  }
}

.ace-editor-wrapper {
  .track-changes-marker-callout {
    border-radius: 0;
    position: absolute;
    .rp-state-overview &,
    .rp-loading-threads & {
      display: none;
    }
  }
  .track-changes-added-marker-callout {
    border-bottom: 1px dashed @rp-green;
    z-index: 1;
  }
  .track-changes-comment-marker-callout {
    border-bottom: 1px dashed @rp-yellow;
  }
  .track-changes-deleted-marker-callout {
    border-bottom: 1px dashed @rp-red;
  }

  .track-changes-marker {
    border-radius: 0;
    position: absolute;
    .rp-loading-threads & {
      display: none;
    }
    z-index: 6; // Appear above text selection
  }

  .track-changes-comment-marker {
    background-color: @rp-yellow;
    opacity: 0.3;
  }
  .track-changes-added-marker {
    background-color: @rp-green;
    opacity: 0.3;
  }
  .track-changes-deleted-marker {
    border-left: 2px dotted @rp-red;
    margin-left: -1px;
  }

  .ace_dark {
    .track-changes-comment-marker {
      background-color: @rp-yellow-on-dark;
    }
    .track-changes-added-marker {
      background-color: @rp-green-on-dark;
    }
  }
}

.cm-editor-wrapper {
  @rp-yellow-for-cm: fade(
    @rp-yellow,
    40%
  ); // Get the RGBA colour with transparency
  @rp-green-for-cm: fade(
    @rp-green,
    40%
  ); // Get the RGBA colour with transparency

  .track-changes-marker {
    border-radius: 0;
  }

  .track-changes-added-marker {
    // Uses rgba so not to affect the opacity of the text - doesn't layer like ace
    background-color: @rp-green-for-cm;
    color: black;
  }

  .track-changes-deleted-marker {
    border-left: 2px dotted #c5060b;
    // Commented out styles for callout to be reimplemented later
    // border-bottom: 1px dashed #c5060b;
    // width: 100%;
  }

  .track-changes-comment-marker {
    // Uses rgba so not to affect the opacity of the text - doesn't layer like ace
    background-color: @rp-yellow-for-cm;
    color: black;
  }

  .track-changes-added-marker.track-changes-comment-marker {
    background-color: mix(@rp-yellow-for-cm, @rp-green-for-cm);
  }
}

.review-icon {
  display: inline-block;
  background: url('../../../../public/img/ol-icons/review-icon-dark-theme.svg')
    top/30px no-repeat;
  width: 30px;

  &::before {
    content: '\00a0'; // Non-breakable space. A non-breakable character here makes this icon work like font-awesome.
  }
}

button when (@is-overleaf-light = true) {
  .review-icon {
    background: url('../../../../public/img/ol-icons/review-icon-light-theme.svg')
      top/30px no-repeat;
  }

  &.active,
  &:active {
    .review-icon {
      background: url('../../../../public/img/ol-icons/review-icon-dark-theme.svg')
        top/30px no-repeat;
    }
  }
}

.resolved-comments-toggle {
  font-size: 14px;
  color: lighten(@rp-type-blue, 25%);
  border: solid 1px @rp-border-grey;
  border-radius: 3px;
  padding: 0 4px;
  display: block;
  height: 22px;
  width: 22px;
  line-height: 1.4;

  &:hover,
  &:focus {
    text-decoration: none;
    color: @rp-type-blue;
  }
}

.resolved-comments-backdrop {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;

  &-visible {
    display: block;
  }
}

.resolved-comments-dropdown {
  display: none;
  position: absolute;
  width: 300px;
  left: -150px;
  max-height: ~'calc(100vh - 100px)';
  margin-top: @rp-entry-arrow-width * 1.5;
  margin-left: 1em;
  background-color: @rp-bg-blue;
  text-align: left;
  align-items: stretch;
  justify-content: center;
  border-radius: 3px;
  box-shadow: 0 0 20px 10px rgba(0, 0, 0, 0.3);
  z-index: 1;

  &::before {
    content: '';
    .triangle(
      top,
      @rp-entry-arrow-width * 3,
      @rp-entry-arrow-width * 1.5,
      @rp-bg-blue
    );
    top: -@rp-entry-ribbon-width * 2;
    left: 50%;
    margin-left: -@rp-entry-arrow-width * 0.75;
  }

  &-open {
    display: flex;
  }
}
.resolved-comments-scroller {
  flex: 0 0 auto; // Can't use 100% in the flex-basis key here, IE won't account for padding.
  width: 100%; // We need to set the width explicitly, as flex-basis won't work.
  max-height: ~'calc(100vh - 100px)'; // We also need to explicitly set the max-height, IE won't compute the flex-determined height.
  padding: 5px;
  overflow-y: auto;
}

.rp-collapse-toggle {
  color: @rp-type-blue;
  font-weight: @rp-semibold-weight;

  &:hover,
  &:focus {
    color: darken(@rp-type-blue, 5%);
    text-decoration: none;
  }
}

.rp-in-editor-widgets {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 11px;
  z-index: 2;

  .rp-size-mini & {
    right: @review-off-width;
  }
  .rp-size-expanded &,
  .rp-unsupported & {
    display: none;
  }
}
.rp-track-changes-indicator {
  display: block;
  padding: 5px 10px;
  background-color: rgba(240, 240, 240, 0.9);
  color: @rp-type-blue;
  text-align: center;
  border-bottom-left-radius: 3px;
  white-space: nowrap;

  &.rp-track-changes-indicator-on-dark {
    background-color: rgba(88, 88, 88, 0.8);
    color: #fff;

    &:hover,
    &:focus {
      background-color: rgba(88, 88, 88, 1);
      color: #fff;
    }
  }

  &:hover,
  &:focus {
    outline: 0;
    text-decoration: none;
    background-color: rgba(240, 240, 240, 1);
    color: @rp-type-blue;
  }
}

.review-panel-toggler {
  display: none;
  position: absolute;
  top: 0;
  bottom: 0;
  width: 10px;
  opacity: 0.5;
  color: @rp-highlight-blue;
  z-index: 1;
  background-color: transparent;
  transition: background 0.1s;

  .rp-size-mini &,
  .rp-size-expanded & {
    display: block;
  }

  .rp-unsupported & {
    display: none;
  }

  .rp-size-expanded & {
    &::after {
      content: '\f105';
    }
  }

  &:hover,
  &:focus {
    color: @rp-highlight-blue;
    background-color: #fff;
  }

  &::after {
    content: '\f104';
    font-family: FontAwesome;
    line-height: 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
    display: block;
    position: absolute;
    top: 50%;
    width: 100%;
    text-align: center;
    margin-top: -0.5em;
  }
}
// Helper class for elements which aren't treated as flex-items by IE10, e.g:
// * inline items;
// * unknown elements (elements which aren't standard DOM elements, such as custom element directives)
.rp-flex-block {
  display: block;
}