@media (color) {
  :root {
    background: #404;
    color: salmon;
  }

  ::selection {
    background: gainsboro;
    color: #404;
  }

  :link { color: turquoise }
  :visited { color: thistle }
}

@media (color) and (prefers-contrast: more) {
  :root { color: peachpuff }
  :link { color: aquamarine }
  :visited { color: pink }
}

html { font: 2em sans-serif }
body { margin: 1em }
h1 { font-weight: 400 }

:focus {
  outline-style: dashed;
  outline-width: thick;
}