starfish.css

a {
  display: inline-flex;
}

span { padding: .382rem }
span:first-child { padding-inline-end: 0 }
span:last-child { padding-inline-start: 0 }

ol {
  list-style: none;
  margin: 0 auto 1em;
  padding: 0;
}

li a {
  display: table;
  padding: 1ch 1ex;
}

@media not (prefers-contrast: less) {
  [class*="tape"] {
    --tape-filter: saturate(161%);
  }
}

nav a {
  box-shadow:
    10vw 10vh 3ex 1ex var(--tape-hex),
    20vw 20vh 3ex 1ex var(--tape-hex),
    30vw 30vh 3ex 1ex var(--tape-hex),
    0 0 3ex 1ex var(--tape-hex);
}

/* https://s9a.page/tape */
:root{--tape-filter:none;--tape-bluv:#11dff1;--tape-play:#fbbfff;--tape-loud:#eee833;--tape-luvu:#44f477;--tape-blaq:#0e0e0e;--tape-watt:#e0e0e0;--tape-hex:#e0e0e0;--tape-mix:transparent}.tape-watt{--tape-hex:var(--tape-watt)}.tape-luvu{--tape-hex:var(--tape-luvu)}.tape-loud{--tape-hex:var(--tape-loud)}.tape-play{--tape-hex:var(--tape-play)}.tape-bluv{--tape-hex:var(--tape-bluv)}.tape-flat{border-color:transparent}.tape-flap{border-color:currentColor}.tape-flow{--tape-remix:none}.tape-flow :not(.tape-skip){background-color:transparent;color:inherit}.tape-blaq,.tape-bluv,.tape-loud,.tape-luvu,.tape-play,.tape-watt{--tape-mix:var(--tape-hex);--tape-remix:none;color:var(--tape-blaq)!important;background-color:var(--tape-mix)!important;background-image:var(--tape-remix);filter:var(--tape-filter)}.tape-blaq{--tape-mix:var(--tape-blaq);color:var(--tape-hex)!important}.tape-erase,.tape-erase *{color:transparent!important}

:any-link {
  text-decoration: dotted underline;
}

:focus {
  outline: thick groove darkviolet;
}

::selection {
  color: var(--tape-loud);
  background: darkviolet;
}

:root {
  --tape-watt: powderblue;
  --tape-play: #e7f;
  --tape-loud: #ee1;
  --tape-luvu: skyblue;
  --tape-blaq: #318;
  --tape-bluv: orange;
}

.alive {
  --tape-remix: conic-gradient(
    var(--tape-luvu) 0%,
    var(--tape-luvu) 20%, 
    var(--tape-bluv) 20%,
    var(--tape-bluv) 40%,
    var(--tape-play) 40%,
    var(--tape-play) 60%,
    var(--tape-loud) 60%,
    var(--tape-loud) 80%,
    var(--tape-watt) 80%,
    var(--tape-watt) 100%
  );
}

h1 {
  contain: layout;
  display: flex;
  font-weight: inherit;
  font-size: 1.618rem;
  margin: 0;
  writing-mode: vertical-lr;
}

html {
  font-family: sans-serif;
  font-size: max(26px, 2vmax + 2vmin);
  line-height: 1.618;
}

body {
  margin: 0 auto 100vmin;
  overflow-wrap: anywhere;
}

main {
  display: flex;
  flex-flow: column;
}

nav {
  align-items: flex-start;
  contain: layout;
  justify-content: center;
  display: flex;
  flex-flow: column;
  margin: auto;
  margin-top: 61.8vh;
  min-height: 100vh;
  transform: rotate(288deg);
}

@media (orientation: portrait) {
  nav {
    transform: rotate(0deg);
  }
}