:root {
  color-scheme: light dark;
  --paper: #f6f3ee;
  --card: #fffdfa;
  --ink: #1d1a16;
  --ink-soft: #6b6457;
  --rule: #e2dbd0;
  --accent: #9a4f1c;
  --match: #f5e7d6;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #191714;
    --card: #221f1b;
    --ink: #f2ede4;
    --ink-soft: #a79d8d;
    --rule: #342f28;
    --accent: #e6a06a;
    --match: #3a2f22;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font:
    16px/1.5 ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2.5rem 1rem 4rem;
}

.masthead h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.masthead p {
  margin: 0.25rem 0 0;
  color: var(--ink-soft);
}

.label {
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.convert {
  margin-top: 2rem;
  padding: 1.25rem;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

#measurement {
  width: 100%;
  padding: 0.75rem 0.875rem;
  font:
    600 1.75rem/1.2 ui-monospace,
    "SF Mono",
    Menlo,
    Consolas,
    monospace;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

#measurement:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.hint {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  color: var(--ink-soft);
}

.result {
  display: block;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  min-height: 3rem;
}

.result-empty,
.result-error {
  color: var(--ink-soft);
  font-size: 0.9375rem;
}

.decimal {
  font:
    700 2.25rem/1.1 ui-monospace,
    "SF Mono",
    Menlo,
    Consolas,
    monospace;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.units {
  margin-left: 0.375rem;
  color: var(--ink-soft);
}

.aside {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.9375rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.chart {
  margin-top: 2.5rem;
}

.chart-head h2 {
  margin: 0;
  font-size: 1.125rem;
}

.chart-head .hint {
  margin-top: 0.125rem;
}

.jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin: 0.875rem 0;
}

.jump button {
  padding: 0.3125rem 0.625rem;
  font:
    600 0.875rem/1 ui-monospace,
    Menlo,
    monospace;
  color: var(--ink-soft);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 999px;
  cursor: pointer;
}

.jump button:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.table-wrap {
  max-height: 24rem;
  overflow: auto;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  padding: 0.625rem 1rem;
  text-align: left;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  background: var(--card);
  border-bottom: 1px solid var(--rule);
}

tbody th[scope="colgroup"] {
  position: sticky;
  top: 2.0625rem;
  z-index: 1;
  padding: 0.375rem 1rem;
  text-align: left;
  font:
    600 0.8125rem/1.4 ui-monospace,
    Menlo,
    monospace;
  color: var(--accent);
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}

tbody td {
  padding: 0.4375rem 1rem;
  border-bottom: 1px solid var(--rule);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9375rem;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr.match td {
  background: var(--match);
  font-weight: 700;
}

.footer {
  margin-top: 2.5rem;
  font-size: 0.75rem;
  color: var(--ink-soft);
  font-family: ui-monospace, Menlo, monospace;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}