body {
  font-family: Arial, sans-serif;
  background: #f0f0f0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.chat-container {
  width: 400px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-box {
  flex: 1;
  padding: 10px;
  overflow-y: auto;
  border-bottom: 1px solid #ddd;
}

.chat-box .user {
  text-align: right;
  color: blue;
  margin: 5px 0;
}

.chat-box .bot {
  text-align: left;
  color: green;
  margin: 5px 0;
}

.chat-box .error {
  color: red;
}

.input-area {
  display: flex;
}

#chatInput {
  flex: 1;
  padding: 10px;
  border: none;
  border-top: 1px solid #ddd;
}

#sendBtn {
  padding: 10px 20px;
  border: none;
  background: #28a745;
  color: white;
  cursor: pointer;
}

#sendBtn:hover {
  background: #218838;
}