body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f7fb;
}

.page {
  text-align: center;
  padding: 30px 15px;
}

h1 {
  margin-bottom: 8px;
  color: #222;
}

.subtitle {
  color: #666;
  margin-bottom: 25px;
}

.chat-container {
  width: 420px;
  max-width: 95%;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

.chat-header {
  background: #007bff;
  color: white;
  padding: 15px;
  font-size: 20px;
  font-weight: bold;
}

.chat-box {
  height: 400px;
  overflow-y: auto;
  padding: 15px;
  background: #fafafa;
  text-align: left;
}

.message {
  max-width: 80%;
  padding: 10px 14px;
  margin: 10px 0;
  border-radius: 10px;
  line-height: 1.4;
}

.user {
  background: #d1e7dd;
  margin-left: auto;
  text-align: right;
}

.bot {
  background: #e9ecef;
  margin-right: auto;
}

.chat-input-area {
  display: flex;
  border-top: 1px solid #ddd;
}

.chat-input-area input {
  flex: 1;
  padding: 12px;
  border: none;
  outline: none;
  font-size: 15px;
}

.chat-input-area button {
  border: none;
  background: #007bff;
  color: white;
  padding: 12px 20px;
  cursor: pointer;
  font-size: 15px;
}

.chat-input-area button:hover {
  background: #0056b3;
}