body {
  font-family: Arial, sans-serif;
  background: #f1f1f1;
  padding: 20px;
}

.login-container, .dashboard {
  max-width: 400px;
  margin: auto;
  padding: 20px;
  background: white;
  box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
  border-radius: 8px;
}

h2 {
  text-align: center;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  box-sizing: border-box;
}

button {
  width: 100%;
  background-color: #007BFF;
  color: white;
  padding: 12px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}

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