body {
  font-family: Arial, sans-serif;
  background: #f2f2f2;
  margin: 0;
  padding: 0;
}
.chat-container {
  width: 90%;
  max-width: 600px;
  margin: 40px auto;
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
#chat-box {
  height: 300px;
  overflow-y: auto;
  border: 1px solid #ccc;
  padding: 10px;
  margin-bottom: 15px;
}
.input-area {
  display: flex;
  gap: 10px;
}
input[type="text"] {
  flex: 1;
  padding: 10px;
}
button {
  padding: 10px 15px;
  cursor: pointer;
}