body {
  background: #f0f2f5;
  font-family: 'Helvetica Neue', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.chat-container {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  width: 350px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
  text-align: center;
}

h1 {
  margin: 0;
  font-size: 24px;
}

.subtitle {
  font-size: 14px;
  color: #666;
  margin-bottom: 16px;
}

.chat-box {
  background: #f7f9fb;
  border-radius: 12px;
  height: 250px;
  overflow-y: auto;
  padding: 10px;
  margin-bottom: 12px;
  text-align: left;
}

.message {
  margin: 6px 0;
  padding: 8px 12px;
  border-radius: 12px;
  max-width: 80%;
}

.message.bot {
  background: #e0e0e0;
  align-self: flex-start;
}

.message.user {
  background: #d2e9ff;
  align-self: flex-end;
  text-align: right;
  margin-left: auto;
}

.input-row {
  display: flex;
  gap: 8px;
}

input[type="text"] {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ccc;
}

button {
  background-color: #2979ff;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
}

button:hover {
  background-color: #1565c0;
}