body {
  background-color: #212529;
  text-align: center;
  margin-top: 1em;
}
.btn {
  width: 125px;
  height: 125px;
  margin-top: 1em;
}
.btn-custom {
  border: 1px solid #cecece;
  background-color: aliceblue;
  transition: border 100ms;
  transition-timing-function: ease-in-out;
}
.btn-custom:hover {
  border: 2px solid blueviolet;
}
.emoji {
  margin: 0;
  font-size: 2em;
}
.list-group-item {
  min-width: 350px;
}