body {
  font-family: Arial, sans-serif;
  background: #f4f6f8;
}

.container {
  width: 400px;
  margin: 50px auto;
}

.card {
  background: #fff;
  padding: 15px;
  margin-bottom: 20px;
  border-radius: 8px;
}

input {
  width: 100%;
  padding: 8px;
  margin: 10px 0;
}

button {
  width: 100%;
  padding: 8px;
  background: #007bff;
  color: white;
  border: none;
  cursor: pointer;
}

.error {
  color: red;
  text-align: center;
}