:root {
  --paper: #efece3;
  --paper-2: #f7f5ef;
  --paper-3: #e6e2d6;
  --ink: #191813;
  --ink-2: #4a4740;
  --ink-3: #68645a;
  --rule: #d2cdbe;
  --rule-soft: #e2ddd0;
  --rule-strong: #837e72;
  --mark: #1d3ec4;
  --mark-soft: #dfe4f7;
  --warn: #a8331f;
  --good: #2b6b4f;
  --rail: 216px;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, -apple-system, sans-serif;
  color-scheme: light;
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--rule-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule-soft) 1px, transparent 1px);
  background-size: 24px 24px;
  font: 16px/1.7 var(--sans);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.3; margin: 0; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.45rem, 4vw, 1.9rem); }
h2 { font-size: 1.1rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 0.9em; }
a { color: var(--mark); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: #14309d; }
code { font: 0.88em/1.6 var(--mono); background: var(--paper-3); padding: 0.08em 0.32em; }
:focus-visible { outline: 2px solid var(--mark); outline-offset: 2px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: -9999px; top: 6px; z-index: 30;
  background: var(--ink); color: var(--paper); padding: 9px 14px;
}
.skip:focus { left: 12px; }
.tag {
  font: 500 0.7rem/1 var(--mono);
  letter-spacing: 0.14em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 16px;
  height: 44px; padding: 0 16px;
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
}
.wordmark { display: inline-flex; align-items: baseline; gap: 8px; text-decoration: none; color: var(--ink); }
.wordmark b { font: 500 0.78rem/1 var(--mono); letter-spacing: 0.16em; color: var(--mark); }
.wordmark span { font-size: 0.9rem; font-weight: 600; white-space: nowrap; }
.topbar nav { display: flex; gap: 14px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.topbar nav::-webkit-scrollbar { display: none; }
.topbar nav a { font-size: 0.82rem; color: var(--ink-2); text-decoration: none; white-space: nowrap; }
.topbar nav a:hover { color: var(--ink); text-decoration: underline; }
.search { position: relative; flex: none; }
.search__open {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 8px; border: 1px solid var(--rule-strong); border-radius: 0;
  background: var(--paper); color: var(--ink-2); cursor: pointer;
  line-height: 1;
}
.search__open:hover { color: var(--mark); border-color: var(--mark); }
.search__open[aria-expanded="true"] { color: var(--mark); border-color: var(--mark); }
.search__key {
  font: 500 0.68rem/1 var(--mono); color: var(--ink-3);
  border: 1px solid var(--rule); padding: 2px 4px; display: none;
}
.search__panel {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 30;
  width: min(92vw, 420px);
  background: var(--paper-2); border: 1px solid var(--ink);
  padding: 12px;
}
.search__input {
  width: 100%; padding: 8px 10px; border-radius: 0;
  border: 1px solid var(--rule-strong); background: var(--paper);
  color: var(--ink); font: 0.92rem/1.3 var(--sans);
}
.search__status {
  margin: 8px 0 0; font-size: 0.76rem; color: var(--ink-3); line-height: 1.6;
}
.search__status a { color: var(--mark); }
.search__results { list-style: none; margin: 8px 0 0; padding: 0; max-height: 52vh; overflow-y: auto; }
.search__results li { border-top: 1px solid var(--rule-soft); }
.search__results a {
  display: grid; gap: 2px; padding: 8px 6px;
  text-decoration: none; color: var(--ink);
}
.search__results a:hover,
.search__results a[aria-selected="true"] { background: var(--paper-3); }
.search__group { font: 500 0.66rem/1 var(--mono); letter-spacing: 0.1em; color: var(--ink-3); }
.search__name { font-size: 0.9rem; font-weight: 600; }
.search__note {
  font-size: 0.78rem; color: var(--ink-2); line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.search__results mark { background: var(--mark-soft); color: var(--ink); font-weight: 600; }
.search__hint {
  margin: 10px 0 0; padding-top: 8px; border-top: 1px solid var(--rule);
  font: 0.68rem/1 var(--mono); color: var(--ink-3); display: none;
}
@media (min-width: 700px) {
  .search__key { display: inline-block; }
  .search__hint { display: block; }
}
.search { display: none; }
.has-search .search { display: block; }
.shell { display: block; }
.rail {
  border-bottom: 1px solid var(--rule);
  background: var(--paper-2);
  padding: 10px 16px;
  overflow-x: auto;
  scrollbar-width: none;
}
.rail::-webkit-scrollbar { display: none; }
.rail { display: flex; gap: 16px; align-items: center; }
.rail__group { flex: none; }
.rail__label {
  display: block; white-space: nowrap; text-decoration: none;
  color: var(--ink-2); letter-spacing: 0.08em;
}
.rail__label:hover { color: var(--mark); }
.rail ul { display: none; list-style: none; margin: 0; padding: 0; }
.rail a { font-size: 0.8rem; color: var(--ink-2); text-decoration: none; white-space: nowrap; }
.rail a:hover { color: var(--ink); }
.rail a[aria-current] { color: var(--mark); font-weight: 600; }
.rail__more { color: var(--ink-3) !important; font-style: italic; }
.stage { padding: 20px 16px 48px; }
@media (min-width: 1000px) {
  .shell { display: grid; grid-template-columns: var(--rail) minmax(0, 1fr); align-items: start; }
  .rail {
    position: sticky; top: 44px;
    height: calc(100vh - 44px);
    overflow-y: auto; overflow-x: hidden;
    border-bottom: 0; border-right: 1px solid var(--rule);
    padding: 20px 0 40px;
  }
  .rail { display: block; }
  .rail__group { padding: 0 18px; margin-bottom: 18px; }
  .rail__group + .rail__group {
    border-top: 1px solid var(--rule);
    padding-top: 16px;
  }
  .rail a.rail__label {
    display: block; margin-bottom: 9px;
    color: var(--ink); font-weight: 600; font-size: 0.85rem;
  }
  .rail a.rail__label:hover { color: var(--mark); }
  .rail ul { display: block; }
  .rail li { margin: 0 -18px; }
  .rail a {
    display: block; padding: 4px 18px; border-left: 2px solid transparent; line-height: 1.45;
    overflow: hidden; text-overflow: ellipsis;
  }
  .rail a:hover { background: var(--paper-3); }
  .rail a[aria-current] { border-left-color: var(--mark); background: var(--paper-3); }
  .stage { padding: 28px 32px 64px; max-width: 1180px; }
}
.crumbs { margin-bottom: 12px; }
.crumbs ol {
  display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none;
  font: 0.72rem/1.5 var(--mono); color: var(--ink-3);
}
.crumbs li + li::before { content: "/"; margin-right: 6px; color: var(--rule); }
.crumbs a { color: var(--ink-3); text-decoration: none; }
.crumbs a:hover { color: var(--mark); }
.pagehead { border-bottom: 2px solid var(--ink); padding-bottom: 14px; margin-bottom: 20px; }
.pagehead .tag { display: block; margin-bottom: 8px; }
.lead { color: var(--ink-2); margin: 8px 0 0; max-width: 62ch; }
.pagehead__meta { font: 0.74rem/1.5 var(--mono); color: var(--ink-3); margin-top: 10px; }
.band { display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px; margin: 34px 0 12px; }
.band::after { content: ""; flex: 1; height: 1px; background: var(--rule); }
.band h2 { font-size: 0.95rem; font-weight: 600; flex: none; max-width: 100%; }
.band h2 a { color: inherit; text-decoration: none; }
.band h2 a:hover { color: var(--mark); text-decoration: underline; }
.band p { margin: 0; font-size: 0.8rem; color: var(--ink-3); }
.empty { color: var(--ink-3); font-size: 0.9rem; }
.index { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.index li { border-bottom: 1px solid var(--rule-soft); }
.index__name { font-weight: 600; font-size: 0.95rem; }
.index__note { color: var(--ink-2); font-size: 0.84rem; line-height: 1.55; }
.index__meta { font: 0.72rem/1.5 var(--mono); color: var(--ink-3); }
.index__all a { display: block; padding: 11px 4px; font-size: 0.84rem;
  font-weight: 600; color: var(--mark); text-decoration: none; }
.index__all a:hover { background: var(--paper-2); text-decoration: underline; }
.index li.row { position: relative; display: grid; gap: 2px 20px; padding: 11px 4px; }
.index li.row:hover { background: var(--paper-2); }
.index a.index__name { color: var(--ink); text-decoration: none; }
.index a.index__name::after { content: ""; position: absolute; inset: 0; }
@media (min-width: 720px) {
  .index li.row { grid-template-columns: minmax(0, 15rem) minmax(0, 1fr) minmax(0, 11rem); align-items: baseline; }
  .index__meta { text-align: right; }
}
.pagehead__act { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0 0; }
.pagehead__act .btn { flex: 1 1 auto; }
@media (min-width: 600px) { .pagehead__act .btn { flex: 0 0 auto; } }
.hot {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 1px;
  background: var(--rule); border: 1px solid var(--rule);
}
.hot__card { background: var(--paper-2); }
.hot__card a {
  display: flex; flex-direction: column; gap: 4px;
  height: 100%; padding: 14px; text-decoration: none; color: var(--ink);
}
.hot__card a:hover { background: var(--paper); }
.hot__q { font-weight: 600; font-size: 0.95rem; }
.hot__a {
  display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap;
  font: 600 1.9rem/1 var(--mono); font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em; color: var(--mark); margin-top: 4px;
  overflow-wrap: anywhere;
}
.hot__a small { font: 400 0.8rem/1 var(--sans); color: var(--ink-3); }
.hot__label { font: 500 0.68rem/1.4 var(--mono); letter-spacing: 0.1em; color: var(--ink-3); }
.hot__note { color: var(--ink-2); font-size: 0.8rem; line-height: 1.55; }
.hot__go { margin-top: auto; padding-top: 8px; font-size: 0.8rem; font-weight: 600; color: var(--mark); }
@media (min-width: 600px) { .hot { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1000px) { .hot { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.why { margin: 0; display: grid; gap: 14px 24px; }
.why dt { font-weight: 600; font-size: 0.92rem; border-left: 2px solid var(--mark); padding-left: 9px; }
.why dd { margin: 4px 0 0 11px; color: var(--ink-2); font-size: 0.85rem; line-height: 1.6; }
@media (min-width: 720px) { .why { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.calc {
  display: flex; flex-direction: column;
  border: 1px solid var(--rule); border-top: 2px solid var(--ink);
  background: var(--paper-2);
}
.result { order: -1; }
.calc__form { display: grid; gap: 0; margin: 0; }
.field {
  display: grid; gap: 5px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--rule-soft);
}
.field__label {
  display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
  font-size: 0.84rem; font-weight: 600;
}
.field__unit { font: 0.72rem/1 var(--mono); color: var(--ink-3); }
.field__row { display: grid; gap: 4px; }
.field__help { color: var(--ink-3); font-size: 0.76rem; line-height: 1.55; margin: 0; }
.calc__group {
  margin: 0; padding: 14px 16px 6px;
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.04em;
  color: var(--mark);
  border-bottom: 1px solid var(--rule-soft);
}
.field__num, select {
  width: 100%; padding: 8px 10px;
  font: 600 1rem/1.25 var(--mono); font-variant-numeric: tabular-nums;
  color: var(--ink); background: var(--paper);
  border: 1px solid var(--rule-strong); border-radius: 0;
  appearance: none;
}
select {
  font-family: var(--sans); font-size: 0.9rem; font-weight: 400;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-2) 50%),
                    linear-gradient(135deg, var(--ink-2) 50%, transparent 50%);
  background-position: calc(100% - 16px) 52%, calc(100% - 11px) 52%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 32px;
}
.field__num:focus, select:focus { border-color: var(--mark); }
.field__num::-webkit-outer-spin-button,
.field__num::-webkit-inner-spin-button { appearance: none; margin: 0; }
.field__num { -moz-appearance: textfield; }
.field__range { width: 100%; height: 20px; appearance: none; background: transparent; cursor: pointer; }
.field__range::-webkit-slider-runnable-track { height: 2px; background: var(--rule-strong); }
.field__range::-moz-range-track { height: 2px; background: var(--rule-strong); }
.field__range::-webkit-slider-thumb {
  appearance: none; width: 14px; height: 14px; margin-top: -6px;
  background: var(--mark); border: 0; border-radius: 0;
}
.field__range::-moz-range-thumb {
  width: 14px; height: 14px; background: var(--mark); border: 0; border-radius: 0;
}
.calc__reset { margin: 0; padding: 9px 16px; }
.linkbtn {
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--ink-3); font: inherit; font-size: 0.76rem;
  text-decoration: underline; text-underline-offset: 3px;
}
.linkbtn:hover { color: var(--ink); }
.result { padding: 16px; border-bottom: 1px solid var(--rule-soft); }
.result__label {
  font: 500 0.72rem/1 var(--mono); letter-spacing: 0.12em; color: var(--ink-3);
  margin: 0 0 6px; text-transform: uppercase;
}
.result__main {
  display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
  font: 600 clamp(2.4rem, 9vw, 3.2rem)/1 var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em; margin: 0;
  overflow-wrap: anywhere;
  padding-bottom: 12px; border-bottom: 2px solid var(--ink);
}
.result__unit { font: 400 0.9rem/1 var(--sans); color: var(--ink-3); }
.result__note { color: var(--ink-3); font-size: 0.76rem; margin: 8px 0 0; }
.result__grid { margin: 12px 0 0; }
.result__grid div {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 7px 0; border-bottom: 1px solid var(--rule-soft);
}
.result__grid dt { color: var(--ink-2); font-size: 0.82rem; }
.result__grid dd {
  margin: 0; font: 600 1rem/1.2 var(--mono); font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere; text-align: right;
}
.result__grid dd small { font: 400 0.7rem/1 var(--sans); color: var(--ink-3); margin-left: 3px; }
[data-out].is-negative { color: var(--warn); }
.verdict {
  margin: 14px 0 0; padding: 10px 0 10px 12px;
  border-left: 3px solid var(--rule);
  font-size: 0.86rem; line-height: 1.6; color: var(--ink-2);
  min-height: calc(1.6em * 3 + 20px);
}
.verdict[data-level="good"] { border-left-color: var(--good); color: #23503d; }
.verdict[data-level="warn"] { border-left-color: #b07a12; color: #6d4c08; }
.verdict[data-level="bad"] { border-left-color: var(--warn); color: #8a2a19; }
.result__share {
  visibility: hidden;
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px;
  margin: 10px 0 0;
}
.result__share[data-ready] { visibility: visible; }
.result__share-note { font-size: 0.72rem; color: var(--ink-3); line-height: 1.5; }
.result__cta { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--rule); }
.result__cta-text { font-size: 0.84rem; color: var(--ink-2); margin: 0 0 10px; }
.result__cta small { display: block; color: var(--ink-3); font-size: 0.7rem; margin-top: 7px; }
.btn {
  display: block; text-align: center; padding: 11px 18px;
  background: var(--ink); color: var(--paper);
  font-weight: 600; font-size: 0.92rem; text-decoration: none;
  border: 1px solid var(--ink);
}
.btn:hover { background: var(--mark); border-color: var(--mark); color: #fff; }
.btn--quiet { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn--quiet:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.house-note {
  margin: 10px 0 0; color: var(--ink-3); font-size: 0.76rem;
  border-left: 2px solid var(--rule); padding-left: 10px;
}
@media (min-width: 900px) {
  .calc { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); }
  .calc__form { border-right: 1px solid var(--rule); }
  .result { order: 0; border-bottom: 0; position: sticky; top: 60px; align-self: start; }
}
.result__table { margin: 14px 0 0; }
.result__table-head {
  font: 500 0.7rem/1 var(--mono); letter-spacing: 0.12em; color: var(--ink-3);
  margin: 0 0 6px; text-transform: uppercase;
}
.tablewrap { overflow-x: auto; }
.result__table table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.result__table th {
  text-align: left; color: var(--ink-3); font: 500 0.7rem/1.4 var(--mono);
  padding: 5px 8px 5px 0; border-bottom: 1px solid var(--ink); white-space: nowrap;
}
.result__table td {
  padding: 6px 8px 6px 0; border-bottom: 1px solid var(--rule-soft);
  font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap;
  color: var(--ink-2);
}
.result__table td:first-child { font-family: var(--sans); }
.result__table tr:last-child td { border-bottom: 0; }
.result__table tr[data-mark] td { background: var(--mark-soft); color: var(--ink); font-weight: 600; }
.result__table tr[data-level="good"] td:last-child { color: var(--good); }
.result__table tr[data-level="bad"] td:last-child { color: var(--warn); }
.result__table tr[data-level="warn"] td:last-child { color: #8a5e0a; }
.result__chart { margin: 16px 0 0; }
.result__chart figcaption {
  font: 500 0.7rem/1 var(--mono); letter-spacing: 0.12em; color: var(--ink-3);
  margin-bottom: 7px; text-transform: uppercase;
}
.result__chart canvas { display: block; width: 100%; background: var(--paper); border: 1px solid var(--rule); }
.result__chart-note { color: var(--ink-3); font-size: 0.72rem; margin: 6px 0 0; line-height: 1.55; }
.prose { max-width: 68ch; }
.prose h2 {
  margin: 32px 0 10px; padding-top: 10px;
  border-top: 1px solid var(--rule);
  font-size: 1.05rem;
}
.prose p, .prose li { color: #2c2a24; }
.prose ul, .prose ol { padding-left: 1.15em; margin: 0 0 0.9em; }
.prose li { margin-bottom: 0.35em; }
.prose .note {
  color: var(--ink-2); font-size: 0.86rem;
  border-left: 3px solid var(--rule); padding: 2px 0 2px 12px;
}
.formula {
  background: var(--paper-2); border: 1px solid var(--rule);
  border-left: 3px solid var(--mark);
  padding: 12px 14px; overflow-x: auto; margin: 0 0 1em;
}
.formula code {
  background: none; padding: 0; color: var(--ink);
  font-size: 0.82rem; line-height: 1.85; white-space: pre;
}
.assumptions { color: var(--ink-2); font-size: 0.88rem; }
.formula__more { font-size: 0.8rem; color: var(--ink-2); margin: -0.4em 0 1.6em; }
.fx { max-width: 68ch; padding-bottom: 18px; margin-bottom: 18px; border-bottom: 1px solid var(--rule-soft); }
.fx h3 { margin-bottom: 2px; }
.fx h3 a { color: var(--ink); text-decoration: none; }
.fx h3 a:hover { color: var(--mark); text-decoration: underline; }
.fx__lead { color: var(--ink-2); font-size: 0.86rem; margin: 0 0 10px; }
.fx__vars,
.fx__eg {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px;
  margin: 0 0 6px; font-size: 0.82rem; color: var(--ink-2);
}
.fx__vars .tag,
.fx__eg .tag { flex: none; }
.fx__vars b { font-weight: 600; color: var(--ink); }
.fx__vars small,
.fx__eg small { color: var(--ink-3); }
.fx__vars span { color: var(--ink-3); }
.fx__eg b { font: 600 1rem/1 var(--mono); font-variant-numeric: tabular-nums; color: var(--mark); }
.fx__go { margin: 8px 0 0; font-size: 0.82rem; }
.example { margin: 0 0 1em; border-top: 1px solid var(--rule); }
.example div {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 8px 0; border-bottom: 1px solid var(--rule-soft);
}
.example dt { color: var(--ink-2); font-size: 0.86rem; }
.example dd {
  margin: 0; font: 600 1rem/1.2 var(--mono); font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere; text-align: right; color: var(--ink);
}
.example dd small { font: 400 0.72rem/1 var(--sans); color: var(--ink-3); margin-left: 4px; }
.figure { margin: 18px 0; }
.figure img { display: block; width: 100%; height: auto; border: 1px solid var(--rule); }
.figure figcaption { margin-top: 8px; font-size: 0.8rem; line-height: 1.6; color: var(--ink-3); }
.myth { border-top: 1px solid var(--rule-soft); padding: 10px 0; margin: 0; }
.myth p { margin: 0; font-size: 0.88rem; display: flex; gap: 10px; }
.myth p + p { margin-top: 5px; }
.myth__wrong { color: var(--ink-3); }
.myth__right { color: #2c2a24; }
.myth span { flex: none; width: 4.2rem; font: 500 0.68rem/1.6 var(--mono); letter-spacing: 0.06em; }
.myth__wrong span { color: var(--warn); }
.myth__right span { color: var(--good); }
.faq details { border-bottom: 1px solid var(--rule-soft); }
.faq summary {
  cursor: pointer; padding: 11px 0; font-weight: 600; font-size: 0.9rem; list-style: none;
  display: flex; justify-content: space-between; gap: 12px; align-items: baseline;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--mark); font: 400 1.1rem/1 var(--mono); flex: none; }
.faq details[open] summary::after { content: "\2212"; }
.faq__a { padding: 0 0 12px; color: #2c2a24; font-size: 0.92rem; }
.faq__a p:last-child { margin-bottom: 0; }
.sources { font-size: 0.84rem; color: var(--ink-2); }
.sources span { color: var(--ink-3); margin-left: 6px; }
.updated {
  color: var(--ink-3); font-size: 0.76rem;
  margin-top: 26px; padding-top: 12px; border-top: 1px solid var(--rule);
}
.brief {
  border: 2px solid var(--ink); background: var(--paper-2);
  padding: 14px 16px; margin: 0 0 20px; max-width: 68ch;
}
.brief .tag { display: block; margin-bottom: 8px; color: var(--mark); }
.brief ul { margin: 0; padding-left: 1.1em; }
.brief li { margin-bottom: 5px; line-height: 1.6; }
.brief li:last-child { margin-bottom: 0; }
.toc { border-left: 2px solid var(--rule); padding: 2px 0 2px 14px; margin-bottom: 22px; max-width: 68ch; }
.toc__head {
  font: 500 0.7rem/1 var(--mono); letter-spacing: 0.12em; color: var(--ink-3);
  margin: 0 0 6px; text-transform: uppercase;
}
.toc ol { margin: 0; padding-left: 1.1em; font-size: 0.86rem; }
.toc li { margin-bottom: 2px; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }
.colophon {
  border-top: 1px solid var(--rule); background: var(--paper-2);
  padding: 26px 16px 32px; font-size: 0.82rem;
}
.colophon__inner { max-width: none; }
.colophon__grid {
  display: grid; gap: 22px 32px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-bottom: 24px;
}
.colophon__grid > div > b { display: block; font-size: 0.9rem; margin-bottom: 4px; }
.colophon p { color: var(--ink-2); margin: 0 0 3px; }
.colophon ul { list-style: none; margin: 0; padding: 0; }
.colophon li { margin-bottom: 4px; }
.colophon li a { color: var(--ink-2); text-decoration: none; }
.colophon li a:hover { color: var(--mark); text-decoration: underline; }
.colophon nav .tag { display: block; margin-bottom: 8px; }
.colophon__legal {
  color: var(--ink-3); font-size: 0.78rem; line-height: 1.7;
  margin: 0 0 10px;
}
.age {
  display: inline-block; background: var(--warn); color: var(--paper-2);
  padding: 1px 6px; font: 500 0.68rem/1.5 var(--mono);
  margin-right: 8px; vertical-align: 1px;
}
.colophon__copy {
  color: var(--ink-3); font: 0.7rem/1 var(--mono);
  margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--rule);
}
@media (min-width: 1000px) {
  .colophon { padding: 32px 32px 44px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
.audit__body { border: 1px solid var(--rule); border-top: 2px solid var(--ink); background: var(--paper-2); }
.audit__list { margin: 0; }
.check {
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 4px 12px; align-items: start;
  padding: 12px 16px; cursor: pointer;
  border-bottom: 1px solid var(--rule-soft);
}
.check:hover { background: var(--paper); }
.check input {
  width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--mark);
  flex: none; cursor: pointer;
}
.check__body { display: grid; gap: 3px; min-width: 0; }
.check__label { font-weight: 600; font-size: 0.9rem; line-height: 1.45; }
.check__note { color: var(--ink-2); font-size: 0.82rem; line-height: 1.55; }
.check__note p { margin: 0; }
.check__where { color: var(--ink-3); font: 0.74rem/1.5 var(--mono); }
.check__weight {
  font: 500 0.74rem/1.6 var(--mono); color: var(--warn);
  border: 1px solid currentColor; padding: 0 5px; white-space: nowrap;
}
.check:has(input:checked) { background: var(--mark-soft); }
.check:has(input:checked) .check__label { color: #16307f; }
.audit__reset { margin: 0; padding: 10px 16px; }
.audit__score { padding: 16px; border-top: 1px solid var(--rule); }
.audit__worst { font-family: var(--sans) !important; font-size: 0.84rem !important; font-weight: 600; }
.audit__ask { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--rule-soft); }
.audit__ask .tag { display: block; margin-bottom: 6px; }
.audit__ask ul { margin: 0; padding-left: 1.1em; font-size: 0.84rem; color: var(--ink-2); }
.audit__ask li { margin-bottom: 4px; }
.scale { width: 100%; border-collapse: collapse; font-size: 0.84rem; }
.scale th {
  text-align: left; font: 500 0.7rem/1.4 var(--mono); color: var(--ink-3);
  padding: 5px 12px 5px 0; border-bottom: 1px solid var(--ink); white-space: nowrap;
}
.scale td { padding: 8px 12px 8px 0; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
.scale td:first-child { font-family: var(--mono); white-space: nowrap; }
.scale td:nth-child(2) { font-weight: 600; white-space: nowrap; }
.scale tr[data-level="good"] td:nth-child(2) { color: var(--good); }
.scale tr[data-level="warn"] td:nth-child(2) { color: #8a5e0a; }
.scale tr[data-level="bad"] td:nth-child(2) { color: var(--warn); }
@media (min-width: 900px) {
  .audit__body { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); }
  .audit__list { border-right: 1px solid var(--rule); }
  .audit__score { border-top: 0; position: sticky; top: 60px; align-self: start; }
}
.matrix__controls {
  display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px 18px;
  padding-bottom: 12px; border-bottom: 2px solid var(--ink);
}
.matrix__search, .matrix__filter { display: grid; gap: 4px; }
.matrix__search { flex: 1 1 14rem; }
.matrix__search input, .matrix__filter select {
  padding: 7px 10px; border: 1px solid var(--rule-strong); border-radius: 0;
  background-color: var(--paper-2); color: var(--ink); font: 0.88rem/1.3 var(--sans);
  appearance: none; width: 100%;
}
.matrix__filter select { padding-right: 30px; min-width: 9rem; }
.matrix__search input:focus, .matrix__filter select:focus { border-color: var(--mark); }
.matrix__count { margin: 0 0 4px auto; font: 0.74rem/1.5 var(--mono); color: var(--ink-3); }
.matrix__wrap { border-bottom: 1px solid var(--rule); }
.matrix__table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.matrix__table th { padding: 0; border-bottom: 1px solid var(--ink); white-space: nowrap; }
.matrix__table th button {
  display: block; width: 100%; text-align: left;
  background: none; border: 0; cursor: pointer;
  padding: 8px 14px 8px 0;
  font: 500 0.74rem/1.4 var(--mono); color: var(--ink-3);
}
.matrix__table th button::after { content: " \2195"; opacity: 0.4; }
.matrix__table th button[data-dir="asc"]::after { content: " \2191"; opacity: 1; }
.matrix__table th button[data-dir="desc"]::after { content: " \2193"; opacity: 1; }
.matrix__table th button:hover { color: var(--mark); }
.matrix__table th.is-num button { text-align: right; padding-right: 18px; }
.matrix__table td {
  padding: 8px 14px 8px 0; border-bottom: 1px solid var(--rule-soft);
  color: var(--ink-2); vertical-align: top;
}
.matrix__table td:first-child { color: var(--ink); font-weight: 600; white-space: nowrap; }
.matrix__table td.is-num {
  text-align: right; padding-right: 18px;
  font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap;
}
.matrix__table td.is-num:last-child, .matrix__table th.is-num:last-child button { padding-right: 0; }
.matrix__table td small { color: var(--ink-3); font-size: 0.72em; margin-left: 2px; }
.matrix__table tbody tr:hover td { background: var(--paper-2); }
.matrix__note { margin: 10px 0 0; font-size: 0.8rem; color: var(--ink-3); max-width: 72ch; }
.defs { margin: 0 0 1em; }
.defs dt { font-weight: 600; font-size: 0.9rem; margin-top: 10px; }
.defs dd { margin: 2px 0 0; color: var(--ink-2); font-size: 0.88rem; }
.qa__head { margin-bottom: 16px; }
.qa__head .tag { display: block; margin-bottom: 8px; }
.qa__head h1 { max-width: 26ch; }
.qa__answer {
  border: 2px solid var(--ink); background: var(--paper-2);
  padding: 16px 18px; margin-bottom: 26px; max-width: 68ch;
}
.qa__answer .tag { display: block; margin-bottom: 8px; color: var(--mark); }
.qa__answer p { font-size: 1.02rem; line-height: 1.65; margin: 0 0 0.7em; }
.qa__answer p:last-child { margin-bottom: 0; }
.qa__block { max-width: 68ch; margin-bottom: 24px; }
.qa__block h2 {
  font-size: 0.95rem; padding-top: 10px; margin-bottom: 8px;
  border-top: 1px solid var(--rule);
}
.qa__block p { color: #2c2a24; }
.qa__list { margin: 0; padding-left: 1.15em; color: #2c2a24; }
.qa__list li { margin-bottom: 7px; }
.qa__list p { margin: 0; }
.term__en {
  font: 500 0.78rem/1 var(--mono); letter-spacing: 0.06em;
  color: var(--ink-3); margin: 6px 0 0;
}
.term__also {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 10px;
  max-width: 68ch; margin: -14px 0 26px;
  padding-top: 10px; border-top: 1px solid var(--rule);
  font-size: 0.86rem;
}
.term__also .tag { flex: none; }
.term__also b { font-weight: 600; }
.term__also span { color: var(--ink-3); }
.spine { list-style: none; margin: 0 0 24px; padding: 0; }
.spine__step {
  display: grid; grid-template-columns: 3.6rem minmax(0, 1fr); gap: 0 16px;
  padding-bottom: 22px;
}
.spine__mark { position: relative; text-align: right; }
.spine__step:not(:last-child) .spine__mark::after {
  content: ""; position: absolute; top: 26px; bottom: -22px; right: -8px;
  width: 1px; background: var(--rule);
}
.spine__num {
  display: block; font: 600 1.4rem/1 var(--mono); color: var(--mark);
  letter-spacing: -0.04em;
}
.spine__time { display: block; margin-top: 4px; font: 0.7rem/1.4 var(--mono); color: var(--ink-3); }
.spine__body { border-top: 2px solid var(--ink); padding-top: 10px; min-width: 0; }
.spine__body h2 { font-size: 1rem; margin-bottom: 6px; }
.spine__body p { color: #2c2a24; font-size: 0.92rem; }
.spine__risk {
  border-left: 3px solid var(--warn); padding: 2px 0 2px 12px; margin: 10px 0;
  font-size: 0.86rem; color: var(--ink-2);
}
.spine__risk .tag { display: block; color: var(--warn); margin-bottom: 3px; }
.spine__risk p { margin: 0; font-size: 0.86rem; }
.spine__tool { margin: 10px 0 0; font-size: 0.86rem; }
.spine__tool a { font-weight: 600; text-decoration: none; }
.spine__tool a:hover { text-decoration: underline; }
@media (min-width: 720px) {
  .spine__step { grid-template-columns: 5rem minmax(0, 1fr); gap: 0 24px; }
  .spine__step:not(:last-child) .spine__mark::after { right: -12px; }
  .spine__num { font-size: 1.7rem; }
}
.cta {
  margin: 36px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--mark);
  background: var(--paper-2);
  max-width: 68ch;
}
.cta__note { margin: 0 0 12px; font-size: 0.9rem; line-height: 1.65; color: var(--ink); }
.cta__btn { display: inline-block; padding: 10px 20px; }
.matrix .cta, .qa .cta, .flow .cta { margin-top: 26px; }