.dark {
    --background: #222;
    --backgroundf: #171717;
    --navbar: #111;
    --text: white;
    transition: 1s ease;
}
:root {
    --background: #f8f9fa;
    --backgroundf: #f8f9fa;
    --navbar: white;
    --text: black;
    transition: 1s ease;
}