html {
    background-color: wheat;
    color: black;
}

@media screen and (prefers-color-scheme: dark) {
    html {
	background-color: black;
	color: wheat;
    }
}

@media print {
    html {
	background-color: white;
	color: black;
    }
    a::after {
	content: " [" attr(href) "]";
    }
}