body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

.chat-container {
  max-width: 400px;
  margin: 50px auto;
  padding: 20px;
  border: 1px solid #ccc;
}

.chat-window {
  height: 300px;
  overflow-y: scroll;
  border: 1px solid #ccc;
  padding: 10px;
  margin-bottom: 10px;
}

.message {
  margin-bottom: 10px;
  padding: 5px 10px;
  border-radius: 5px;
}

.sent {
  background-color: #dcf8c6;
  text-align: right;
}

.received {
  background-color: #e2e2e2;
  text-align: left;
}