:root {
  color-scheme: light dark;
}
body {
  color: light-dark(black, white);
  background-color: light-dark(skyblue, black);
}

a:link { color: light-dark(blue,lightskyblue);}
a:visited { color: light-dark(blue,lightskyblue);}
a:hover { color: light-dark(blue,lightskyblue);}
a:active { color: light-dark(blue,lightskyblue);}

th {  color: light-dark(black,white);}
td { color: light-dark(black,white);}
tr {  color: light-dark(black,white);}
table {  color: light-dark(black,white);}
table:border {  color: light-dark(black,white);}