ultra.css

* {
  box-sizing: border-box;
}

a {
  box-sizing: border-box;
  border-radius: 100%;
  display: inline-flex;
  margin: auto;
  padding: 1ch;
}

a:nth-child(odd) { text-decoration: 1ch wavy underline }
a:nth-child(even) { text-decoration: 1ch dotted overline }

nav > a {
  flex-basis: 39%;
  display: list-item;
  list-style: circle inside;
  margin-bottom: 1ch;
  min-height: 38vmin;
}

nav > :focus {
  list-style: disc inside;
}

::marker {
  display: inline-flex;
  font-size: 1.618em;
}

html {
  font-family: sans-serif;
  font-size: max(3ch, 2vmax + 3vmin);
  line-height: 1.618;
}

body {
  margin: auto;
  overflow-wrap: anywhere;
  padding: 1rem;
}

h1 {
  font-size: 2.618em;
  flex-basis: 62%;
  margin: auto;
  margin-inline: auto 0;
  margin-block: 38vh;
}

abbr {
  display: inline-flex;
  transform: rotate(3deg);
}

nav {
  align-items: space-between;
  display: flex;
  justify-content: center; 
  flex-flow: column wrap;
}

@media (orientation: landscape) {
  nav {
    flex-direction: row;
  }
}