festa/styles/globals.css

html {
    padding: 0;
    margin: 0;
}

* {
    box-sizing: border-box;
}

@media (prefers-color-scheme: light) {
    body {
        background-color: white;
        color: black;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: black;
        color: white;
    }
}