::selection {
  text-shadow: 0 -1ex 0 hotpink;
  background: hotpink;
  color: black;
}

:root {
  color: #33d;
  background-color: burlywood;
  background-image: linear-gradient(.2turn, darkviolet 0%, darkviolet 12%, gold 12%);
}

:any-link {
  color: darkviolet;
}

:focus {
  outline: thick double;
  text-shadow:
    0 -1vmax 0,
    0 -1vmin 0;
}

u {
  color: blueviolet;
}

@media (prefers-reduced-motion: no-preference) {
  :any-link {
    transition: text-shadow 300ms ease-out;
  }
}