body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to bottom, #0072ce, #ffc72c);
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.chat-container {
  background: #fff;
  border-radius: 12px;
  width: 95%;
  max-width: 500px;
  height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

header {
  background: #0072ce;
  color: white;
  padding: 16px;
  border-radius: 12px 12px 0 0;
  text-align: center;
}

.chat-box {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  background: #f9f9f9;
}

.message {
  margin-bottom: 12px;
  line-height: 1.4;
}

.user {
  text-align: right;
  color: #0072ce;
}

.bot {
  text-align: left;
  color: #333;
}

form {
  display: flex;
  padding: 12px;
  border-top: 1px solid #ddd;
}

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

button {
  margin-left: 8px;
  background: #0072ce;
  color: white;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  background: #005fa3;
}