body.light-mode {
    background-color: white;
    color: black;
}
body.dark-mode {
    background-color: black;
    color: white;
}

.form-container {
    max-width: 600px;
    margin: auto;
    padding: 30px;
    background-color: #f8f9fa;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}