body {
  font-family: Arial, sans-serif;
  background: #111;
  color: #fff;
  padding: 20px;
}

input, button {
  padding: 10px;
  margin: 5px;
  border-radius: 5px;
  border: none;
}

button {
  background: #4caf50;
  color: white;
  cursor: pointer;
}

#chat {
  margin-top: 10px;
  max-height: 300px;
  overflow-y: auto;
}

.msg {
  padding: 6px;
  margin-bottom: 4px;
  background: #222;
  border-radius: 4px;
}

.box {
  margin-bottom: 10px;
}