body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #f9f9fb;
  color: #222;
  text-align: center;
  margin-top: 50px;
}

h1 {
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0;
}

.subtitle {
  font-weight: 400;
  color: #777;
  margin-bottom: 30px;
}

#chatbox {
  width: 80%;
  max-width: 600px;
  margin: 0 auto;
  height: 400px;
  overflow-y: auto;
  border: 1px solid #ccc;
  border-radius: 10px;
  padding: 15px;
  background: white;
}

.message {
  margin: 5px 0;
  line-height: 1.4;
}

.user {
  text-align: right;
  color: #007aff;
}

.bot {
  text-align: left;
  color: #34c759;
}

input, button {
  padding: 10px;
  margin-top: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 16px;
}

button {
  background-color: #007aff;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: #0059c1;
}