body {
  max-height: auto;
}
#main-area {
  border: solid 1px gray;
}
#shuffle-area {
  text-align: center;;
}
textarea {
  margin: 2%;
  width: 96%;
  height: 15rem;
  font-size: 1rem;
  resize: vertical;
}
button {
  display: block;
  margin: 0 auto 24px auto;
}
#num-teams {
  width: 3rem;
  line-height: 1rem;
  font-size: 1rem;
  margin-bottom: 8px;
}