body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f6f8;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-container {
  width: 100%;
  max-width: 400px;
}

.login-card {
  background: white;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  display: flex;
  flex-direction: column;
}

.login-card h2 {
  text-align: center;
  margin-bottom: 20px;
}

input {
  margin-bottom: 15px;
  padding: 12px;
  border-radius: 6px;
  border: 1px solid #ddd;
  font-size: 16px;
}

button {
  padding: 12px;
  border: none;
  background: #0d6efd;
  color: white;
  font-size: 16px;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #0b5ed7;
}

#errorMessage {
  color: red;
  text-align: center;
  margin-top: 10px;
}