body {
  font-family: Arial, sans-serif;
  padding: 20px;
}

.container {
  max-width: 400px;
  margin: 0 auto;
  background: #f4f4f4;
  padding: 20px;
  border-radius: 8px;
}

input, button, textarea {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
}

button {
  background: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #45a049;
}

.error {
  color: red;
  font-size: 12px;
}

h2 {
  text-align: center;
}