DIFFER.css

/* 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}

/* play. */

.pastel {
  --tape-bluv: lightskyblue;
  --tape-luvu: turquoise;
  --tape-play: moccasin;
}

.pepper {
  --tape-bluv: deepskyblue;
}

.pacify {
  --tape-play: hotpink;
}

.saliva {
  --tape-luvu: chartreuse;
}

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

:focus {
  --tape-filter: hue-rotate(-18deg);
  outline-color: thick outset;
  border-radius: 0 9%;
  box-shadow: 0 0 0 3vmax magenta;
}

.hype {
  --tape-remix: linear-gradient(.2turn, thistle, skyblue, deepskyblue, skyblue, mediumorchid); 
  font-family: sans-serif;
  font-size: max(3ch, 2vmax + 3vmin);
  line-height: 1.618;
}

.nah {
  display: contents;
}

.byte {
  display: block;
  margin: auto;
  margin-block-end: 1em;
}

.duende {
  margin: auto;
  display: flex;
  flex-flow: wrap;
}

.tickle {
  writing-mode: vertical-lr;
}

.calm { font: inherit }
.bold { font-weight: bold }
.hella { font-size: 1.618em }
.exhale { margin-bottom: 1rem }

span,
a {
  display: inline-flex;
  flex-flow: column;
  transition: 500ms filter;
}

:link { box-sizing: border-box; padding: 2vmax }
:visited { touch-action: manipulation }
:nth-child(odd) { text-decoration-style: dotted }
:focus { text-decoration-style: dashed } 
:hover { text-decoration-style: wavy }

.pad {
  box-sizing: border-box;
  padding: 1em;
}