:root {
  --paper: #f5f1e4;
  --surface: #fbf8ef;
  --ink: #1f3b2d;
  --text: #24302a;
  --muted: #5d6b62;
  --line: #d9d2bd;
  --accent: #2f6b4f;
  --gold: #a57a2c;
  --highlight: #ece2c2;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f1713;
    --surface: #16221c;
    --ink: #e4dcc4;
    --text: #dcd8cc;
    --muted: #9aa79f;
    --line: #2b3b32;
    --accent: #84c3a0;
    --gold: #d6b06a;
    --highlight: #2a3a2a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font: 16px/1.5 var(--sans);
}

.masthead {
  text-align: center;
  padding: 40px 16px 8px;
}

.eyebrow {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 4px 0 0;
  font: 700 clamp(2.4rem, 7vw, 4.2rem)/1.05 var(--serif);
  color: var(--ink);
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 20px;
}

.hero {
  text-align: center;
  padding: 20px 16px 24px;
  border-block: 3px double var(--ink);
}

.label {
  margin: 0;
  font: 500 0.9rem/1.4 var(--sans);
  color: var(--muted);
}

.debt-amount {
  margin: 6px 0 16px;
  font: 700 clamp(1.6rem, 6.4vw, 3.4rem)/1.1 var(--serif);
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.toggle {
  display: inline-flex;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 3px;
  gap: 3px;
}

.toggle button {
  font: 500 0.85rem var(--sans);
  color: var(--ink);
  background: transparent;
  border: 0;
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
}

.toggle button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.toggle button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.toggle-small button { font-size: 0.8rem; padding: 5px 12px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px clamp(16px, 4vw, 32px);
}

.card h2 {
  margin: 0;
  font: 700 1.5rem/1.2 var(--serif);
  color: var(--ink);
}

.explain {
  margin: 6px 0 0;
  color: var(--muted);
}

.per-household {
  max-width: 38rem;
  margin: -6px auto 16px;
}

.answer {
  margin: 10px 0 0;
  color: var(--ink);
  font-family: var(--serif);
}

.figure {
  font-size: clamp(3rem, 12vw, 5.5rem);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.unit { font-size: clamp(1.5rem, 5vw, 2.2rem); }

.coins {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 20px;
}

.coin { display: block; width: 48px; height: 48px; }

.coin-partial {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  outline: 1.5px dashed var(--line);
  outline-offset: -1px;
}

.coin-partial img {
  clip-path: inset(0 calc((1 - var(--fraction)) * 100%) 0 0);
}

.payout {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.payout-row {
  display: grid;
  grid-template-columns: 120px 3.5rem 1fr auto;
  align-items: center;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.payout-row .coin { width: 120px; height: 120px; }

.payout-count {
  font: 700 1.6rem var(--serif);
  color: var(--ink);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.payout-who { display: grid; }
.payout-name { font-weight: 600; }
.payout-each { font-size: 0.85rem; color: var(--muted); }

.payout-total {
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  text-align: right;
}

.payout-change { border-bottom: 0; }


.summary {
  margin: 14px 0 0;
  font: 600 1.05rem/1.4 var(--serif);
  color: var(--ink);
}

.denoms {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 8px;
}

.denom {
  position: relative;
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: center;
  gap: 10px;
  padding: 6px 10px 6px 6px;
  border-radius: 10px;
}

.denom .coin { width: 80px; height: 80px; }
.denom.used { background: var(--highlight); }
.denom-text { display: grid; min-width: 0; }
.denom-rank { font: 700 0.78rem var(--serif); color: var(--gold); font-variant-numeric: tabular-nums; }
.denom-name { font-weight: 600; font-size: 0.92rem; overflow-wrap: anywhere; }
.denom-value { font-size: 0.85rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.denom-rate { font-size: 0.8rem; color: var(--accent); font-variant-numeric: tabular-nums; }

.denom-count {
  position: absolute;
  top: 4px;
  right: 8px;
  font: 700 0.85rem var(--serif);
  color: var(--gold);
}

footer {
  max-width: 920px;
  margin: 8px auto 40px;
  padding: 0 16px;
  font-size: 0.85rem;
  color: var(--muted);
}

footer a { color: var(--accent); }

@media (max-width: 560px) {
  .coin, .coin-partial { width: 36px; height: 36px; }
  .coins { gap: 4px; }
  .payout-row { grid-template-columns: 80px 2.8rem 1fr; gap: 10px; }
  .payout-count { font-size: 1.25rem; white-space: nowrap; }
  .payout-row .coin { width: 80px; height: 80px; }
  .payout-total { grid-column: 3; text-align: left; font-size: 0.9rem; }
  .denoms { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
  .denom { grid-template-columns: 56px 1fr; gap: 8px; padding: 6px; }
  .denom .coin { width: 56px; height: 56px; }
  .denom-name { font-size: 0.82rem; }
  .denom-value { font-size: 0.78rem; }
}