body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
  color: #333;
}

header {
  text-align: center;
  padding: 20px;
  background-color: #4CAF50;
  color: white;
}

header h1 {
  margin: 0;
}

main {
  display: flex;
  justify-content: center;
  margin: 20px;
}

#chat-container {
  width: 90%;
  max-width: 600px;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

#chat-window {
  height: 400px;
  overflow-y: auto;
  padding: 10px;
  border-bottom: 1px solid #ddd;
}

#chat-window .user-message {
  text-align: right;
  margin: 5px 0;
}

#chat-window .bot-message {
  text-align: left;
  margin: 5px 0;
}

#chat-input {
  display: flex;
  padding: 10px;
}

#user-input {
  flex: 1;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

#send-btn {
  padding: 10px 15px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin-left: 10px;
}

#send-btn:hover {
  background-color: #45a049;
}