body {
  font-family: Arial, sans-serif;
  max-width: 400px;
  margin: 40px auto;
}

form {
  border: 1px solid #ccc;
  padding: 16px;
  margin-bottom: 20px;
}

input, button {
  width: 100%;
  padding: 8px;
  margin: 6px 0;
}

button {
  cursor: pointer;
}