#join, #invite {
  display: none;
}

#join.on, #invite.on {
  display: block;
}

#leave {
  display: none;
}

#login.on #join {
  display: none;
}

#login.on #leave {
  display: inline;
}

#players {
  min-height: 4em;
  border: 1px solid #ccc;
}

#players .message {
  display: block;
  text-align: center;
  margin: 1em;
  color: #555;
}

#players .message:empty {
  display: none;
}

#players .list {
  list-style: none;
  margin: 0;
  padding-left: 0;
}