/* the coin: two faces back to back, flipped in 3d */
.stage {
  perspective: 900px;
  padding: 48px 0 24px;
}

.coin {
  --coin-size: min(44vw, 170px);
  position: relative;
  width: var(--coin-size);
  height: var(--coin-size);
  transform-style: preserve-3d;
}

.face {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  border-radius: 50%;
  backface-visibility: hidden;
  background: radial-gradient(circle at 35% 30%, #f4dc8a, #c9a23a 60%, #9a7a22);
  box-shadow: inset 0 0 0 6px #b08a2c, inset 0 0 0 9px #e6c76a, 0 14px 30px rgb(0 0 0 / 0.25);
  color: #4a3a0c;
}

.tails {
  transform: rotateY(180deg);
}

.face-letter {
  font: 800 calc(var(--coin-size) * 0.42) / 1 var(--font);
}

.face-word {
  font: 700 0.7rem/1 var(--mono);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

/* resting positions */
.coin.shows-heads { transform: rotateY(0deg); }
.coin.shows-tails { transform: rotateY(180deg); }

/* the toss: up, five-and-a-bit turns, and back down on the right face */
.coin.is-flipping-heads { animation: toss-heads 1.6s cubic-bezier(0.3, 0.7, 0.4, 1) forwards; }
.coin.is-flipping-tails { animation: toss-tails 1.6s cubic-bezier(0.3, 0.7, 0.4, 1) forwards; }

@keyframes toss-heads {
  0% { transform: translateY(0) rotateY(0deg); }
  45% { transform: translateY(-90px) rotateY(900deg); }
  100% { transform: translateY(0) rotateY(1800deg); }
}

@keyframes toss-tails {
  0% { transform: translateY(0) rotateY(0deg); }
  45% { transform: translateY(-90px) rotateY(990deg); }
  100% { transform: translateY(0) rotateY(1980deg); }
}

.flip-button {
  margin-top: 16px;
  padding: 8px 20px;
}

.tasks {
  display: grid;
  gap: 6px;
  min-height: 1em;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.85rem;
  text-align: left;
}

.tasks li::before {
  content: "…";
  display: inline-block;
  width: 2ch;
  color: var(--muted);
}

.tasks li.is-done::before {
  content: "✓";
}

/* the report reads like a printed document */
.report {
  width: 100%;
  margin-top: 24px;
  position: relative;
  padding: 24px 20px;
  text-align: left;
  animation: report-in 300ms ease-out;
}

/* sits in the top corner of the report like it was stamped by hand */
.report-stamp {
  position: absolute;
  top: 22px;
  right: 18px;
}

.report-kicker {
  margin: 0;
  color: var(--muted);
  font: 0.75rem var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.report h2 {
  margin: 4px 0 20px;
  font-size: clamp(1.5rem, 6vw, 2rem);
}

.report h2:focus {
  outline: none; /* focus is moved here for screen readers */
}

.report h3 {
  margin: 20px 0 8px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
}

.figures div {
  padding: 8px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
}

.figures dt {
  color: var(--muted);
  font-size: 0.75rem;
}

.figures dd {
  margin: 2px 0 0;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.conclusion {
  margin: 0;
}

.fine-print {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

@keyframes report-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 420px) {
  .figures {
    grid-template-columns: 1fr;
  }
}