@media (prefers-color-scheme: light) {
  body {
    background-color: white;
    color: black;
  }

  a {
    color: blue;
    text-decoration: underline;
    padding-left: 5px;
    padding-right: 5px;
    min-width: 20px;
  }

  a:hover {
    color: #07F;
  }
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #303030;
    color: white;
  }

  a {
    color: #5DB0D7;
    text-decoration: underline;
    padding-left: 5px;
    padding-right: 5px;
    min-width: 20px;
  }

  a:hover {
    color: #82CAFA;  // light sky
  }
}