* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 20px;
  font-family: sans-serif;
  color: #333;
  background: #f0f2f5;
}

.account-box {
  width: 100%;
  max-width: 420px;
  margin: 40px auto;
  padding: 25px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.account-box h1 {
  margin-top: 0;
  text-align: center;
}

.account-box label {
  display: block;
  margin-top: 14px;
  font-weight: bold;
}

.account-box input {
  width: 100%;
  margin-top: 5px;
  padding: 10px;
  border: 1px solid #bbb;
  border-radius: 4px;
  font-size: 1rem;
}

.account-box button {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  color: #fff;
  background: #007bff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
}

.account-box a {
  color: #0056b3;
}

.error-message {
  padding: 10px;
  color: #842029;
  background: #f8d7da;
  border-radius: 4px;
}