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

.container {
    max-width: 400px;
    margin: 80px auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

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

label {
    display: block;
    margin-bottom: 8px;
}

input {
    width: 100%;
    padding: 10px;
    margin-bottom: 16px;
    box-sizing: border-box;
}

input[type="submit"] {
    background-color: #4caf50;
    color: white;
    cursor: pointer;
}

input[type="submit"]:hover {
    background-color: #45a049;
}

.error {
    color: red;
}