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

img.emoji {
  width: 20px;
  height: 20px;
  vertical-align: middle;
}

img.emoji.only-emoji {
  width: 32px;
  height: 32px;
  margin: 0.5em 0;
}

a,
.md-table,
.poll {
  img.emoji.only-emoji {
    width: 20px;
    height: 20px;
    margin: 0;
  }
}

small img.emoji,
sub img.emoji,
sup img.emoji {
  height: 1.1em;
  width: 1.1em;
}

.emoji-picker {
  background-clip: padding-box;
  z-index: z("modal", "content");
  position: fixed;
  display: none;
  flex-direction: row;
  height: 320px;
  color: var(--primary);
  background-color: var(--secondary);
  border: 1px solid var(--primary-low);

  img.emoji {
    // custom emojis might import images of various sizes
    // we don't want the picker to be difformed
    width: 20px !important;
    height: 20px !important;
  }
}

.emoji-picker .categories-column {
  display: flex;
  flex-direction: column;
  flex: 1 0 0px;
  align-items: center;
  justify-content: space-between;
  border-right: 1px solid var(--primary-low);
  min-width: 36px;
  overflow-y: auto;
  padding: 0.5em;
}

.emoji-picker .category-icon {
  display: block;
  margin: 4px auto;
  -webkit-filter: grayscale(100%);
  filter: grayscale(100%);

  button.emoji {
    margin: 0;
    padding: 0;
  }
}

.emoji-picker .category-icon.current,
.emoji-picker .category-icon:hover {
  -webkit-filter: grayscale(0%);
  filter: grayscale(0%);
}

.emoji-picker .main-column {
  display: flex;
  flex-direction: column;
  flex: 20;
}

.emoji-picker .list {
  overflow-y: scroll;
  -webkit-overflow-scrolling: touch;
  padding: 0;
  flex: 1 0 0px;
  flex-direction: column;
}

.emoji-picker .section-header {
  padding: 8px;
  margin-top: 2px;
  margin-bottom: 0px;
  padding-bottom: 0px;
  justify-content: space-between;
  display: flex;
  align-items: center;
  font-weight: bold;
}

.emoji-picker .section-header .title {
  color: var(--primary);
}

.emoji-picker .section-header .clear-recent .fa {
  margin: 0;
  padding: 0;
  color: var(--primary-medium);

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

.emoji-picker .section-group {
  flex-wrap: wrap;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 4px;
}

.emoji-picker .footer {
  align-items: center;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--primary-low);
}

.emoji-picker .info {
  @include ellipsis;
  padding-left: 8px;
  font-weight: 700;
  max-width: 125px;
}

.emoji-picker .diversity-picker {
  display: flex;
  justify-content: flex-end;
  padding: 8px;
}

.emoji-picker .diversity-picker .diversity-scale {
  width: 20px;
  height: 20px;
  margin-left: 5px;
  border: 0;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.emoji-picker .diversity-picker .diversity-scale.default {
  background: #ffcc4d;
}
.emoji-picker .diversity-picker .diversity-scale.light {
  background: #f7dece;
}
.emoji-picker .diversity-picker .diversity-scale.medium-light {
  background: #f3d2a2;
}
.emoji-picker .diversity-picker .diversity-scale.medium {
  background: #d5ab88;
}
.emoji-picker .diversity-picker .diversity-scale.medium-dark {
  background: #af7e57;
}
.emoji-picker .diversity-picker .diversity-scale.dark {
  background: #7c533e;
}

.emoji-picker .diversity-picker .diversity-scale.selected .d-icon {
  display: block;
}

.emoji-picker .diversity-picker .d-icon {
  display: none;
}

.emoji-picker .diversity-picker .d-icon {
  color: #fff;
  font-size: $font-0;
  filter: drop-shadow(0.5px 1.5px 0 rgba(0, 0, 0, 0.3));
}

.emoji-picker button.emoji {
  background: transparent;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: 0;
  background-size: 20px 20px;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  height: 20px;
  border: 0;
  vertical-align: top;
  width: 20px;
  outline: none;
  padding: 3px;
  margin: 2px;
}

.emoji-picker .section-group button.emoji:hover,
.emoji-picker .results button.emoji:hover {
  display: inline-block;
  vertical-align: top;
  border-radius: 2px;
  background-color: var(--tertiary-low);
}

.emoji-picker-modal.fadeIn {
  z-index: z("modal", "overlay");
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0.8;
  background-color: black;
}

.emoji-picker .filter {
  background-color: none;
  border-bottom: 1px solid var(--primary-low);
  padding: 5px;
  display: flex;
  position: relative;
  align-items: center;

  input[type="text"] {
    width: auto !important;
  }
}

.emoji-picker .filter .d-icon-search {
  color: var(--primary-medium);
  font-size: $font-up-1;
  margin-left: 5px;
  margin-right: 5px;
}

.emoji-picker .filter input {
  height: 24px;
  margin: 0;
  flex: 1 0 0px;
  border: none;
  box-shadow: none;
  padding-right: 24px;
  outline: none;
  color: var(--primary);
  background: var(--secondary);

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

.emoji-picker .filter input::-ms-clear {
  display: none;
}

.emoji-picker .results {
  display: none;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  padding: 4px;
  flex: 1 0 0px;
}

.emoji-picker .filter .clear-filter {
  position: absolute;
  right: 5px;
  top: 12px;
  border: 0;
  background: none;
  color: var(--primary-high);
  outline: none;
  display: none;

  &:hover {
    color: var(--primary);
  }
}