body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 400px;
    margin: 100px auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

h2 {
    text-align: center;
    color: #333;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #555;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

button[type="submit"] {
    width: 100%;
    padding: 10px;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.error {
    color: red;
    margin-top: 5px;
    text-align: center;
}