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

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

.wmd-emoji-button:before {
  content:  "\f118";
}

.emoji-modal {
  z-index: 10000;
  position: fixed;
  margin-left: -195px;
  margin-top: -100px;
  left: 50%;
  top: 50%;
  background-color: #dadada;
}

.emoji-page td {
  border: 1px solid transparent;
  background-color: white;
}

.emoji-page a {
  padding: 8px;
  display: block;
  border-radius: 20px;
}

.emoji-page a:hover {
  background-color: rgb(210, 236, 252);
}

.emoji-table-wrapper {
  min-width: 442px;
  min-height: 185px;
  background-color: white;
}

.emoji-modal-wrapper {
  z-index: 9999;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0.8;
  background-color: black;
}

.emoji-modal .toolbar {
  margin: 8px 0 5px;
}

.emoji-modal .toolbar li {
  display: inline;
  padding-right: 1px;
}

.emoji-modal .toolbar li a {
  padding: 8px;
  background-color: #dadada;
}

.emoji-modal .toolbar li a.selected {
  background-color: #fff;
}

.emoji-modal .info {
  height: 30px;
  margin-left: 8px;
  margin-top: 15px;
  margin-bottom: 0px;
}

.emoji-modal .info span {
  margin-left: 5px;
  font-weight: bold;
}

.emoji-modal .info {
  float: left;
}
.emoji-modal .nav {
  float: right;
  margin-top: 15px;
}

.emoji-modal .nav span {
  color: #aaa;
  margin-right: 10px;
}

.emoji-modal .nav a {
  color: #333;
}