static-site-generator/style/style.css

:root {
    color-scheme: light dark;

    --light-bg: ghostwhite;
    --light-color: darkslategray;
    --light-code: tomato;

    --dark-bg: darkslategray;
    --dark-color: ghostwhite;
    --dark-code: gold;
}

* {
    background-color: light-dark(var(--light-bg), var(--dark-bg));
    color: light-dark(var(--light-color), var(--dark-color));
}

code {
    color: light-dark(var(--light-code), var(--dark-code));
}