smiley.css

.smiley-button {
  background-color: inherit;
  border: none;
  display: block;
  overflow: hidden;
  margin: 0;
  padding: 0;
  width: 2em;
  height: 2em;
  font-size: 1em;
}
.smiley-button:hover {
  background: #d3d3d3;
}
.smiley-picker {
  background-color: white;
  width: 14em;
  height: 14em;
  display: block;
  border: 1px solid black;
  overflow: scroll;
}

.hidden {
  display: none;
}

.smiley {
  background: none;
  border: none;
  margin: 0;
  padding: 0;
  width: 2em;
  height: 2em;
  font-size: 2em;
  overflow: hidden;
}

.smiley:hover {
  background: #d3d3d3;
}