body {
  font-family: 'Vazir', sans-serif;
  background-color: #f2f2f2;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.login-container {
  background-color: #fff;
  padding: 30px 25px;
  border-radius: 12px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.08);
  width: 100%;
  max-width: 380px;
  box-sizing: border-box;
}

h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

form {
  display: flex;
  flex-direction: column;
}

input[type="text"],
input[type="password"] {
  padding: 12px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 15px;
}

button {
  padding: 12px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #45a049;
}

.register-link {
  margin-top: 15px;
  text-align: center;
}

.register-link a {
  color: #007BFF;
  text-decoration: none;
}

.register-link a:hover {
  text-decoration: underline;
}

.error {
  color: red;
  text-align: center;
  margin-bottom: 15px;
  font-size: 14px;
}

@media (max-width: 500px) {
  .login-container {
    padding: 20px 15px;
    border-radius: 8px;
  }

  input[type="text"],
  input[type="password"],
  button {
    font-size: 14px;
    padding: 10px;
  }

  h2 {
    font-size: 20px;
  }
}