html {
  font-family: fantasy;
  font-size: max(3ch, 3vmax + 3vmin);
}

body {
  align-items: center;
  display: flex;
  flex-flow: column;
  margin: 0;
  overflow-wrap: anywhere;
  min-height: 100vh;
  border: thick groove orchid;
}

h1 {
  font-size: 2.618em;
    text-shadow:
    3vw 3vh 1pt hotpink,
    3vw 5vh 1pt #ec0,
    3vw 3vh 1pt hotpink,
    -3vw 3vh 1pt hotpink;
}

pre {
  font-size: 1.618em;
  text-shadow:
    -3vw -21vh 1pt #ec0,
    3vw 3vh 1pt hotpink,
    3vw -5vh 1pt #ec0,
    3vw -3vh 1pt hotpink,
    -3vw 3vh 1pt hotpink;
}

body > * {
  box-sizing: border-box;
  display: flex;
  flex-flow: column;
  justify-content: center;
  margin: 0;
  min-height: 100vh;
}

:any-link {
  text-decoration-style: double;
}

:focus {
  outline: thick dotted;
}