/* Default Light Mode Styles */
body {
    background-color: #ffffff;
    color: #000000;
    font-family: Arial, sans-serif;
    transition: background-color 0.5s, color 0.5s;
}

header {
    background-color: #f1f1f1;
    padding: 10px;
    text-align: center;
}

button {
    padding: 10px 20px;
    margin-top: 10px;
    cursor: pointer;
}

/* Dark Mode Styles */
body.dark-mode {
    background-color: #333333;
    color: #ffffff;
}

header.dark-mode {
    background-color: #444444;
}

button.dark-mode {
    background-color: #555555;
    color: #ffffff;
}