body {
  font-family: sans-serif;
  text-align: center;
  background-size: cover;
  background-position: center;
  padding: 2rem;
  color: #fff;
}

#emojiBank .emoji {
  font-size: 2rem;
  margin: 0.5rem;
  cursor: grab;
}

#dropTray {
  border: 2px dashed #fff;
  padding: 1rem;
  min-height: 3rem;
  font-size: 1.5rem;
  background: rgba(255,255,255,0.2);
  margin-bottom: 1rem;
}

button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  margin: 0.5rem;
  cursor: pointer;
}