:root {
  --paper: #f3efe6;
  --ink: #1c1916;
  --muted: #5e584e;
  --line: #ddd4c6;
  --copper: #8d4318;
  --ok: #14663a;
  --bad: #8d221c;
  --fill: #e8e2d6;
  --ok-bg: #e4f2ea;
  --bad-bg: #f8e7e4;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.45;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 36px 24px 72px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  column-gap: 56px;
  row-gap: 28px;
}

.lede { grid-column: 1; }

.kicker {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
}

.tools { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px; }
.tools a {
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  color: inherit;
  font-size: 14px;
}
.tools a[aria-current="page"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.tools select {
  font: inherit;
  font-size: 14px;
  color: inherit;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
}

.wrap.hub { display: block; max-width: 760px; }

.tool-row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
}

.tool-row strong {
  font-family: Georgia, "Iowan Old Style", Palatino, serif;
  font-size: 22px;
  font-weight: 500;
}

.tool-row span { color: var(--muted); font-size: 14px; text-align: right; }

h1 {
  margin: 0;
  font-family: Georgia, "Iowan Old Style", Palatino, serif;
  font-size: 44px;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

h2 {
  margin: 0 0 6px;
  font-family: Georgia, "Iowan Old Style", Palatino, serif;
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.intro { margin: 12px 0 0; color: var(--muted); max-width: 46rem; }

.presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

button, .choice label {
  font: inherit;
  color: inherit;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
}

button:hover, .choice label:hover { border-color: var(--ink); }

button:focus-visible, input:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

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

.result {
  grid-column: 2;
  grid-row: 1 / span 3;
  position: sticky;
  top: 20px;
  align-self: start;
  padding-top: 4px;
  border-top: 3px solid var(--copper);
}

.result.is-bad { border-top-color: var(--bad); }

.status {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ok);
}

.result.is-bad .status { color: var(--bad); }

.hero {
  margin: 4px 0 0;
  font-family: Georgia, "Iowan Old Style", Palatino, serif;
  font-size: 72px;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--copper);
}

.result.is-bad .hero { color: var(--bad); }

.hero .unit { font-size: 0.4em; letter-spacing: 0; }

.meter-label { margin: 8px 0; color: var(--muted); font-size: 14px; min-height: 1.2em; }

.meter {
  height: 6px;
  background: var(--fill);
  border-radius: 999px;
  overflow: hidden;
}

.meter span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--copper);
}

.result.is-bad .meter span { background: var(--bad); }

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
  margin: 20px 0 0;
}

.facts dt { font-size: 12px; color: var(--muted); }
.facts dd {
  margin: 2px 0 0;
  font-variant-numeric: tabular-nums;
  font-size: 18px;
}

.formula {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.form { grid-column: 1; display: grid; gap: 18px; }

fieldset { border: 0; margin: 0; padding: 0; }
legend { padding: 0; margin-bottom: 8px; font-size: 13px; color: var(--muted); }

.choice { display: flex; flex-wrap: wrap; gap: 8px; }

.choice input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.choice input:checked + label {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.choice input:focus-visible + label {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.fields {
  display: grid;
  grid-template-columns: minmax(0, 240px) minmax(0, 240px);
  gap: 16px 28px;
}

.field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 8px;
  align-items: end;
  max-width: 240px;
}
.field > span:first-child { grid-column: 1 / -1; font-size: 13px; color: var(--muted); }
.field input {
  width: 100%;
  font: inherit;
  font-size: 22px;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--ink);
  border-radius: 0;
  padding: 4px 0 6px;
}
.suffix { font-size: 13px; color: var(--muted); padding-bottom: 8px; }

.quick { display: flex; flex-wrap: wrap; gap: 8px; }
.quick button { font-size: 13px; padding: 4px 10px; }

.section-field { margin-top: 12px; max-width: 220px; }
.hint { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

.table-block { grid-column: 1 / -1; margin-top: 12px; }
.table-scroll { overflow-x: auto; margin-top: 14px; }

table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-size: 12px; font-weight: 500; color: var(--muted); }
td:nth-child(n + 2), th:nth-child(n + 2) { text-align: right; }

tbody button {
  border: 0;
  border-radius: 0;
  padding: 0;
  background: none;
  font-variant-numeric: tabular-nums;
  text-align: left;
}
tbody button:hover { color: var(--copper); }

tr.is-selected td { background: var(--fill); }
tr.is-min td:first-child { box-shadow: inset 3px 0 0 var(--copper); }
tr.is-bad td:last-child { color: var(--bad); }
tr.is-ok td:last-child { color: var(--ok); }

.note {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  max-width: 46rem;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 800px) {
  .wrap { grid-template-columns: 1fr; padding: 24px 16px 48px; }
  .lede, .result, .form, .table-block, .note { grid-column: 1; grid-row: auto; }
  .result { position: static; order: 2; }
  .lede { order: 1; }
  .form { order: 3; }
  .table-block { order: 4; }
  .note { order: 5; }
  h1 { font-size: 36px; }
  .hero { font-size: 60px; }
  .fields { grid-template-columns: 1fr; }
}

@media print {
  .result { position: static; }
  button, .choice label { border-color: #bbb; }
}