/* BASIS (r5a) — everyday number workbench.
   Warm paper, deep ink, one brick accent for calls to action / active / key marks,
   deep teal only for "lower unit price". Spacing 4/8/12/16/24/32. */
:root {
  --paper: #f8f6f1;
  --surface: #ffffff;
  --sunk: #f0ece3;
  --ink: #1a2930;
  --ink-2: #4a5560;
  --line: #ddd7cc;
  --line-strong: #8e877a;
  --accent: #b84a32;
  --accent-hover: #9c3d28;
  --low: #0f6b5e;
  --low-bg: #e3f2ef;
  --error: #b42318;
  --error-bg: #fdedec;
  --warn-bg: #fff4da;
  --warn-edge: #a8701a;
  --focus: #1d4ed8;
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px; --s6: 32px;
  --r-sm: 6px; --r-md: 10px; --r-lg: 14px;
  --font: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Apple SD Gothic Neo", "Malgun Gothic", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK JP", "Noto Sans CJK KR", "Noto Sans CJK SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); font-size: 1.0625rem; line-height: 1.6; font-variant-numeric: tabular-nums; }
a { color: var(--ink); text-underline-offset: 0.18em; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
p { overflow-wrap: anywhere; }
.page { width: 100%; max-width: 72rem; margin: 0 auto; padding-left: var(--s4); padding-right: var(--s4); }
.visually-hidden { position: absolute !important; 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: 8px; top: -60px; background: var(--surface); color: var(--ink); padding: 8px 12px; border-radius: var(--r-sm); z-index: 10; }
.skip:focus { top: 8px; }
.u { color: var(--ink-2); font-weight: 500; font-size: 0.9375rem; white-space: nowrap; }

/* ---------- mark, wordmark, icons ---------- */
.mark { width: 30px; height: 30px; flex: none; }
.mk-ink { fill: var(--ink); }
.mk-paper { fill: #ffffff; }
.mk-accent { fill: var(--accent); }
.ic { width: 22px; height: 22px; flex: none; }
.ic-line { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.ic-dot { fill: var(--accent); }
.brand-word { font-weight: 800; letter-spacing: 0.08em; font-size: 1.0625rem; }
.brand-desc { color: var(--ink-2); font-size: 0.9375rem; font-weight: 500; padding-left: var(--s3); border-left: 1px solid var(--line-strong); }

/* ---------- header ---------- */
.site-header { border-bottom: 1px solid var(--line); }
.header-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s2) var(--s4); padding-top: 10px; padding-bottom: 10px; }
.brand { display: inline-flex; align-items: center; gap: var(--s3); min-height: 44px; color: var(--ink); text-decoration: none; }
.langs ul { display: flex; flex-wrap: wrap; gap: 2px; margin: 0; padding: 0; list-style: none; }
.langs a { display: inline-flex; align-items: center; min-height: 36px; padding: 4px 10px; border-radius: 999px; color: var(--ink-2); text-decoration: none; font-size: 0.9375rem; }
.langs a:hover { color: var(--ink); background: var(--sunk); }
.langs a[aria-current="true"] { background: var(--ink); color: #fff; }
@media (max-width: 480px) { .brand-desc { display: none; } }

main { padding-top: var(--s5); padding-bottom: 56px; }
main:focus { outline: none; }
h1 { margin: 0 0 var(--s2); line-height: 1.2; letter-spacing: -0.02em; }
h2 { font-size: 1.125rem; line-height: 1.35; margin: 0 0 var(--s2); }
h3 { font-size: 1rem; line-height: 1.4; margin: var(--s4) 0 var(--s1); }
.lead { margin: 0 0 var(--s1); font-size: 1.0625rem; }
.help { margin: 0; color: var(--ink-2); font-size: 0.9375rem; }
.note, .hint { color: var(--ink-2); font-size: 0.9375rem; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 20px; font: inherit; font-size: 1rem; font-weight: 700; border-radius: var(--r-sm); border: 1px solid transparent; cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #2d3f48; }
.btn-accent { background: var(--accent); color: #fff; min-height: 48px; padding: 10px 24px; }
.btn-accent:hover { background: var(--accent-hover); }
.btn-quiet { background: var(--surface); color: var(--ink); border-color: var(--line-strong); }
.btn-quiet:hover { background: var(--sunk); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line-strong); }
.btn-ghost:hover { background: var(--surface); }
.btn-small { min-height: 40px; padding: 6px 14px; font-size: 0.9375rem; }
.btn-end { margin-left: auto; }
.btn-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--ink); font-weight: 700; text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 0.3em; }
.btn-link:hover { text-decoration-color: var(--ink); }

/* ---------- home ---------- */
.home { padding-top: var(--s4); }
:lang(ko) { word-break: keep-all; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s6); align-items: center; }
@media (min-width: 960px) { .hero { grid-template-columns: minmax(0, 55fr) minmax(0, 45fr); gap: 48px; } }
.eyebrow { margin: 0 0 var(--s3); color: var(--accent); font-weight: 700; font-size: 0.9375rem; letter-spacing: 0.02em; }
.hero h1 { font-size: clamp(2.125rem, 4.2vw, 3rem); line-height: 1.12; font-weight: 800; letter-spacing: -0.03em; margin-bottom: var(--s4); }
.hero h1 span { display: block; }
.hero-desc { margin: 0 0 var(--s5); font-size: 1.125rem; color: var(--ink-2); max-width: 34rem; line-height: 1.65; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s3) var(--s5); margin: 0; }

.preview { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); padding: var(--s4) var(--s5); box-shadow: 0 1px 0 var(--line); }
.preview figcaption { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s1) var(--s3); margin-bottom: var(--s3); }
.pv-title { display: inline-flex; align-items: center; gap: var(--s2); font-weight: 700; }
.pv-note { color: var(--ink-2); font-size: 0.875rem; margin: 0; }
.pv-cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s3); }
.pv-col { padding: var(--s3); border-radius: var(--r-md); background: var(--paper); border: 1px solid var(--line); min-width: 0; }
.pv-col.is-low { background: var(--low-bg); border-color: #b9ddd6; }
.pv-name { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s1) var(--s2); margin: 0 0 var(--s2); font-weight: 700; }
.pv-dl { margin: 0; display: grid; gap: var(--s1); }
.pv-dl div { display: grid; gap: 0; }
.pv-dl dt { color: var(--ink-2); font-size: 0.875rem; }
.pv-dl dd { margin: 0; font-weight: 700; overflow-wrap: normal; }
.pv-key dd { font-size: 1.375rem; font-weight: 800; letter-spacing: -0.01em; }
@media (max-width: 479px) { .preview { padding: var(--s3); } .pv-col { padding: var(--s2) 10px; } .pv-key dd { font-size: 1.1875rem; } }
.pv-memo { margin: var(--s3) 0 0; padding-top: var(--s2); border-top: 1px solid var(--line); font-weight: 700; }

.more { margin-top: var(--s5); }
.more-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--s1) var(--s3); border-bottom: 2px solid var(--ink); padding-bottom: var(--s2); }
.more-h { margin: 0; font-size: 1.0625rem; }
.more-list { list-style: none; margin: 0; padding: 0; }
.more-row { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--s2) var(--s4); align-items: center; padding: var(--s3) 0; border-bottom: 1px solid var(--line); }
.more-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: var(--r-md); background: var(--sunk); }
.more-text p { margin: 0; }
.more-name { font-weight: 700; font-size: 1.125rem; }
.more-task { color: var(--ink-2); font-size: 0.9375rem; }
.more-fig { margin: 0; font-size: 1.25rem; font-weight: 800; grid-column: 2; }
.more-row .btn { grid-column: 2; justify-self: start; }
@media (min-width: 760px) {
  .more-row { grid-template-columns: auto minmax(0, 1.4fr) minmax(0, 1fr) auto; padding: var(--s2) 0; }
  .more-fig { grid-column: auto; text-align: right; }
  .more-row .btn { grid-column: auto; }
}

/* ---------- root language page ---------- */
.root-page { max-width: 44rem; padding-top: 40px; }
.root-brand { display: flex; align-items: center; gap: var(--s3); margin-bottom: var(--s5); }
.root-title { font-size: 1.375rem; font-weight: 800; }
.root-title .sep { color: var(--ink-2); font-weight: 400; }
.root-list { list-style: none; margin: var(--s5) 0; padding: 0; border-top: 2px solid var(--ink); }
.root-lang { display: grid; gap: 2px; padding: var(--s4) var(--s1); border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.root-lang:hover .root-lang-name { text-decoration: underline; }
.root-lang-name { font-size: 1.25rem; font-weight: 800; }
.root-lang-site { font-weight: 600; color: var(--accent); }
.root-lang-tag { color: var(--ink-2); }

/* ---------- tool page frame ---------- */
main.tool { padding-top: 0; }
.tool-tabs { margin: 0 0 var(--s3); border-bottom: 1px solid var(--line); }
.tool-tabs ul { display: flex; flex-wrap: wrap; gap: 2px var(--s2); margin: 0; padding: 0; list-style: none; }
.tool-tabs a { display: flex; align-items: center; gap: var(--s2); min-height: 48px; padding: 6px 10px; margin-bottom: -1px; color: var(--ink-2); font-weight: 600; text-decoration: none; border-bottom: 3px solid transparent; }
.tool-tabs a:hover { color: var(--ink); }
.tool-tabs a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }
.tool-intro { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: var(--s3) var(--s5); margin-bottom: var(--s2); }
.intro-text { flex: 1 1 28rem; min-width: 0; max-width: 48rem; }
.intro-text h1 { font-size: clamp(1.75rem, 2.6vw, 2rem); font-weight: 800; margin-bottom: var(--s1); }
.example-box { flex: 0 1 22rem; display: grid; justify-items: end; gap: var(--s1); }
.example-status { margin: 0; font-size: 0.9375rem; color: var(--ink-2); text-align: right; }
.example-status:empty { display: none; }
@media (max-width: 640px) { .example-box { justify-items: start; } .example-status { text-align: left; } }
.step { display: flex; align-items: baseline; gap: var(--s2); margin: 0 0 var(--s2); font-weight: 700; font-size: 0.9375rem; color: var(--ink); }
.step-n { color: var(--accent); font-weight: 800; letter-spacing: 0.04em; }
.step--result { margin-top: var(--s1); }

/* ---------- form ---------- */
.tool-form { border-top: 2px solid var(--ink); padding-top: var(--s3); }
.form-hint { display: flex; flex-wrap: wrap; gap: 2px var(--s5); margin: 0 0 var(--s2); color: var(--ink-2); font-size: 0.9375rem; }
.grid-2 { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s3) var(--s4); }
.field { min-width: 0; }
label { display: block; font-weight: 600; font-size: 0.9375rem; margin-bottom: var(--s1); }
.input-row { display: flex; align-items: stretch; min-width: 0; }
input[type="text"], select, textarea {
  width: 100%; min-width: 0; min-height: 48px; padding: 8px 12px;
  font: inherit; font-size: 1.125rem; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--r-sm);
}
input[type="text"]:hover, select:hover { border-color: var(--ink-2); }
.input-row input { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.input-row input:only-child { border-radius: var(--r-sm); }
.suffix { display: flex; align-items: center; justify-content: center; min-width: 3.4em; padding: 0 10px; background: var(--sunk); border: 1px solid var(--line-strong); border-left: 0; border-radius: 0 var(--r-sm) var(--r-sm) 0; color: var(--ink-2); font-size: 0.9375rem; white-space: nowrap; }
[aria-invalid="true"] { border-color: var(--error); border-width: 2px; background: var(--error-bg); }
.err { display: flex; gap: 6px; align-items: flex-start; margin: 6px 0 0; color: var(--error); font-size: 0.9375rem; font-weight: 600; }
.err[hidden] { display: none; }
.err-mark { flex: none; display: inline-grid; place-items: center; width: 1.25em; height: 1.25em; margin-top: 0.15em; border-radius: 50%; background: var(--error); color: #fff; font-size: 0.8em; font-weight: 700; line-height: 1; }
fieldset { margin: 0; padding: var(--s3) var(--s4) var(--s4); border: 1px solid var(--line); border-radius: var(--r-md); min-width: 0; background: var(--surface); }
legend { font-weight: 700; padding: 0 6px; }
.check { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; margin: 0; min-height: 44px; cursor: pointer; }
.check input { width: 22px; height: 22px; margin: 0; accent-color: var(--ink); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: var(--s3); }
.form-status { margin: 10px 0 0; color: var(--error); font-weight: 600; }
.form-status:empty { display: none; }

.pct-row { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s3) var(--s4); align-items: end; }
.pct-row .actions { margin-top: var(--s1); }
.pct-arrow { display: none; font-size: 1.5rem; color: var(--ink-2); }
@media (min-width: 760px) {
  .pct-row { grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto; align-items: start; }
  .pct-arrow { display: block; padding-top: 34px; }
  .pct-row .actions { margin-top: 28px; }
}

.rows { display: grid; gap: 10px; }
.row-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 14px; align-items: start; }
.row-grid > .field:nth-child(3) { grid-column: 1; }
.row-opts { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 12px; grid-column: 1 / -1; }
@media (min-width: 760px) {
  .row-grid { grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(12rem, auto); }
  .row-grid > .field:nth-child(3) { grid-column: auto; }
  .row-opts { grid-column: auto; padding-top: 28px; }
}
.add-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: var(--s3); }
.add-row .err { flex-basis: 100%; }

.field-currency { margin-bottom: var(--s3); }
.items { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s3) var(--s4); }
.item-cell { min-width: 0; container: item / inline-size; }
.item-cell > .item { margin: 0; height: 100%; }
.item .grid-2 { grid-template-columns: minmax(0, 1fr); }
@container item (min-width: 25rem) { .item .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 700px) {
  .items { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tool--unit .field-currency { display: grid; grid-template-columns: auto minmax(9rem, 14rem) minmax(0, 1fr); align-items: center; column-gap: var(--s3); }
  .tool--unit .field-currency label, .tool--unit .field-currency .hint { margin: 0; }
  .tool--unit .field-currency .err { grid-column: 1 / -1; }
}
@media (min-width: 1100px) { .items--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.item-tag { display: inline-grid; place-items: center; width: 1.6em; height: 1.6em; margin-right: 0.45em; background: var(--ink); color: #fff; border-radius: 5px; font-weight: 800; font-size: 0.875rem; flex: none; }
.item-foot { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 6px 12px; margin-top: 10px; }
.item-more { flex: 1 1 12rem; min-width: 0; }
.item-more[open] summary { margin-bottom: 4px; }
.item-more .field-name { margin: 0; }

details summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: var(--s2); min-height: 36px; font-weight: 600; font-size: 0.9375rem; color: var(--ink); }
details summary::-webkit-details-marker { display: none; }
details summary::before { content: ""; flex: none; width: 0; height: 0; border-style: solid; border-width: 5px 0 5px 7px; border-color: transparent transparent transparent currentColor; transition: transform 120ms ease; }
details[open] > summary::before { transform: rotate(90deg); }

/* ---------- result ---------- */
.result-wrap { margin-top: var(--s5); }
.result-card { border-top: 2px solid var(--ink); padding-top: var(--s4); display: grid; gap: var(--s5) 40px; }
@media (min-width: 960px) { .result-card.has-side { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); } }
.result-main, .result-side { min-width: 0; }
.result-card h2 { display: flex; align-items: center; gap: var(--s2); font-size: 0.9375rem; color: var(--ink-2); margin: 0 0 6px; }
.result-side h3 { margin: 0 0 var(--s2); font-size: 0.9375rem; color: var(--ink-2); }
.ok-mark { display: inline-grid; place-items: center; width: 1.3rem; height: 1.3rem; border-radius: 50%; background: var(--ink); color: #fff; font-size: 0.75rem; line-height: 1; }
.headline { font-size: clamp(1.5rem, 3vw, 1.875rem); line-height: 1.25; font-weight: 800; letter-spacing: -0.01em; margin: 0 0 var(--s4); overflow-wrap: anywhere; }
.headline--sub { font-size: 1.0625rem; font-weight: 600; letter-spacing: 0; margin-bottom: 6px; }
.fig-label { margin: 0; color: var(--ink-2); font-weight: 600; }
.big-figure { margin: 0 0 6px; font-size: clamp(2.25rem, 6vw, 2.5rem); line-height: 1.1; font-weight: 800; letter-spacing: -0.02em; overflow-wrap: anywhere; }
.pct-figure { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; margin: 0 0 var(--s2); font-size: clamp(2.25rem, 6vw, 2.5rem); line-height: 1.15; font-weight: 800; overflow-wrap: anywhere; }
.pct-figure span { min-width: 0; overflow-wrap: anywhere; }
.pct-figure .arrow { color: var(--ink-2); font-weight: 400; }
.result-card ul { margin: 0; padding: 0; list-style: none; }
.result-lines { margin-top: var(--s3) !important; }
.result-lines li { font-size: 1.0625rem; padding: 3px 0; overflow-wrap: anywhere; }
.pay-note { margin: var(--s2) 0 0; color: var(--ink-2); font-size: 0.9375rem; }
.result-warn, .result-info { margin-top: var(--s3) !important; padding: 10px 14px !important; border-radius: var(--r-sm); }
.result-warn { background: var(--warn-bg); border: 1px solid var(--warn-edge); }
.result-info { background: var(--sunk); }
.result-warn li, .result-info li { overflow-wrap: anywhere; padding: 1px 0; font-size: 0.9375rem; }
.round-note { margin: var(--s3) 0 0; font-size: 0.875rem; color: var(--ink-2); }
details.calc { margin-top: var(--s3); border-top: 1px solid var(--line); padding-top: 6px; }
details.calc li { font-size: 0.9375rem; overflow-wrap: anywhere; padding: 1px 0; }
.result-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: var(--s4); }
.copy-status { margin: 0; font-weight: 600; flex-basis: 100%; }
.copy-status:empty { display: none; }
.manual-copy { margin-top: var(--s3); }
.manual-copy textarea { font-size: 0.9375rem; min-height: 9em; resize: vertical; }
.result-card--stale .headline, .result-card--stale .big-figure, .result-card--stale .pct-figure, .result-card--stale .big-num { color: var(--ink-2); }
.stale { display: flex; gap: 8px; align-items: flex-start; margin: 0 0 10px; padding: 10px 12px; font-weight: 700; background: var(--warn-bg); border: 1px solid var(--warn-edge); border-radius: var(--r-sm); }
.warn-mark { flex: none; display: inline-grid; place-items: center; width: 1.25em; height: 1.25em; margin-top: 0.15em; border-radius: 50%; background: var(--warn-edge); color: #fff; font-size: 0.8em; font-weight: 700; line-height: 1; }

/* unit: one column per item, rows aligned across items */
.low-pill { display: inline-flex; align-items: center; min-height: 24px; padding: 1px 10px; border-radius: 999px; background: var(--low); color: #fff; font-size: 0.8125rem; font-weight: 700; white-space: nowrap; }
.cmp-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s3); }
@media (min-width: 640px) {
  .cmp-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cmp-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cmp-grid { grid-template-rows: auto auto auto auto; row-gap: 0; }
  .cmp-col { grid-row: span 4; display: grid; grid-template-rows: subgrid; }
}
.cmp-col { min-width: 0; padding: var(--s4); border: 1px solid var(--line); border-radius: var(--r-md); background: var(--surface); }
.cmp-col.is-low { border-color: var(--low); box-shadow: inset 0 3px 0 var(--low); }
.cmp-col p { margin: 0; }
.cmp-head { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s1) var(--s2); padding-bottom: var(--s2); font-weight: 700; min-width: 0; }
.cmp-name { overflow-wrap: anywhere; min-width: 5rem; flex: 1 1 5rem; font-weight: 600; }
.cmp-name:empty { display: none; }
.cmp-label { display: block; color: var(--ink-2); font-size: 0.875rem; font-weight: 600; }
.cmp-key { padding-bottom: var(--s3); }
.big-num { font-size: clamp(1.75rem, 3.2vw, 2.25rem); font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; overflow-wrap: anywhere; }
.cmp-col.is-low .big-num { color: var(--low); }
.num-unit { color: var(--ink-2); font-size: 0.9375rem; font-weight: 500; white-space: nowrap; }
.cmp-fact { padding: var(--s2) 0; border-top: 1px solid var(--line); }
.cmp-val { font-weight: 700; font-size: 1.0625rem; overflow-wrap: anywhere; }
.result-main .result-lines li:first-child { font-weight: 600; }

/* percent breakdown + time table */
.kv-list { margin: 0; display: grid; }
.kv { display: flex; justify-content: space-between; gap: var(--s3); padding: 10px 0; border-bottom: 1px solid var(--line); }
.kv dt { color: var(--ink-2); font-weight: 600; }
.kv dd { margin: 0; font-weight: 800; font-size: 1.25rem; overflow-wrap: anywhere; min-width: 0; text-align: right; }
.formula { margin: var(--s3) 0 0; font-size: 1.0625rem; overflow-wrap: anywhere; }
.time-table { width: 100%; border-collapse: collapse; }
.time-table th, .time-table td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: baseline; overflow-wrap: anywhere; }
.time-table thead th { font-size: 0.875rem; color: var(--ink-2); font-weight: 600; border-bottom: 2px solid var(--ink); }
.time-table .num { text-align: right; }
.time-table .strong { font-weight: 800; }
.cell-num { min-width: 5rem; }
@media (max-width: 640px) {
  .time-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .time-table, .time-table tbody, .time-table tr, .time-table th, .time-table td { display: block; width: 100%; }
  .time-table tr { border: 1px solid var(--line); border-radius: var(--r-md); margin-bottom: 10px; padding: 4px 0; background: var(--surface); }
  .time-table th, .time-table td { border-bottom: 0; padding: 4px 12px; text-align: left !important; }
  .time-table td::before, .time-table th[scope="row"]::before { content: attr(data-label); display: block; font-size: 0.8125rem; color: var(--ink-2); font-weight: 600; }
  .cell-num { min-width: 0; }
}

/* ---------- storage + how it works (quiet, below the task) ---------- */
.tool-aside { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 40px; margin-top: 40px; }
@media (min-width: 960px) { .tool-aside { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); } }
.store, .explain { padding-top: var(--s4); border-top: 1px solid var(--line); font-size: 0.9375rem; }
.store h2, .explain h2 { font-size: 1rem; }
.store-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; }
.store-status { margin: 6px 0 0; font-weight: 600; }
.store-status:empty { display: none; }
.explain p { margin: 0 0 6px; }
.sources, .related { margin: 0; padding-left: 1.2em; }
.sources li, .related li { margin: 2px 0; overflow-wrap: anywhere; }

.site-footer { border-top: 1px solid var(--line); color: var(--ink-2); font-size: 0.9375rem; padding: 18px 0 32px; }
.footer-row p { margin: 0 0 4px; }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }

/* Decision workspace: purpose first, disclosure for the reusable library. */
.task-switch,.demo-switch { display:flex; flex-wrap:wrap; gap:4px; margin:4px 0 8px; }
.task-choice { appearance:none; border:1px solid var(--line); background:transparent; color:var(--ink); font:inherit; font-size:.9375rem; font-weight:650; min-height:44px; padding:7px 12px; border-radius:6px; cursor:pointer; }
.task-choice:hover { background:var(--surface); border-color:var(--ink-2); }
.task-choice.active { background:var(--ink); color:#fff; border-color:var(--ink); }
.tool--unit .intro-text { max-width:47rem; }
.tool--unit .tool-intro { margin-bottom:4px; }
.tool--unit .field-currency { margin-bottom:8px; }
.tool--unit .form-hint { margin-bottom:4px; }
.required-row { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:8px 16px; max-width:42rem; padding:12px 0 16px; }
.required-row .help { grid-column:1/-1; }
.required-row input { width:100%; min-height:48px; }
.purchase-grid { display:grid; grid-template-columns:minmax(0,1fr); gap:24px; margin:20px 0 24px; }
.purchase-column { min-width:0; border-top:3px solid var(--line); padding-top:12px; }
.purchase-column.best-spend { border-color:var(--low); }
.purchase-column h3 { margin:0 0 18px; display:flex; align-items:baseline; gap:8px; overflow-wrap:anywhere; }
.purchase-cost { font-size:clamp(1.5rem,3vw,2.25rem); font-weight:800; line-height:1.2; margin:0 0 20px; overflow-wrap:normal; }
.purchase-cost .u { display:block; margin-top:3px; }
.purchase-facts { margin:0; }
.purchase-facts > div { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.2fr); gap:12px; padding:7px 0; border-bottom:1px solid var(--line); }
.purchase-facts dt { color:var(--ink-2); font-size:.9375rem; }
.purchase-facts dd { margin:0; text-align:right; font-weight:650; overflow-wrap:normal; }
.decision-headline { font-size:clamp(1.375rem,3vw,2rem); line-height:1.3; font-weight:800; margin:12px 0; }
.unit-rank { color:var(--low); font-weight:650; margin:0; }
.quantity-graphic,.simple-graphic { margin:20px 0; }
.quantity-graphic figcaption,.simple-graphic figcaption { color:var(--ink-2); font-size:.9375rem; font-weight:600; margin-bottom:10px; }
.quantity-line { display:grid; grid-template-columns:32px minmax(0,1fr); align-items:center; gap:12px; max-width:38rem; }
.quantity-line svg { display:block; width:100%; height:36px; }
.graph-track { fill:#e7e3da; }
.graph-needed { fill:var(--low); }
.graph-leftover { stroke:var(--accent); stroke-width:.5; }
.hatch { fill:none; stroke:var(--accent); stroke-width:1; }
.graph-reference { fill:none; stroke:var(--ink); stroke-width:1.5; }
.graph-legend { margin:8px 0 0; color:var(--ink-2); font-size:.9375rem; }
.graph-text-row { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:4px 12px; margin:10px 0; }
.graph-text-row span { font-size:.9375rem; color:var(--ink-2); }
.graph-text-row strong { text-align:right; }
.graph-text-row svg { grid-column:1/-1; width:100%; height:14px; }
.change-metrics { display:grid; grid-template-columns:minmax(0,1fr); gap:16px; margin:20px 0; }
.change-metric { padding:12px 0; border-top:1px solid var(--line); min-width:0; }
.change-metric h3 { margin:6px 0; color:var(--ink-2); font-size:.9375rem; }
.change-metric p { margin:0; font-size:1.5rem; font-weight:800; overflow-wrap:normal; }
.metric-arrow { color:var(--accent); font-size:1.25rem; }
.change-unit-pair { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:24px; padding:16px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.change-unit-pair strong { font-size:1.5rem; overflow-wrap:normal; }
.change-unit-pair .u { white-space:normal; }
.library { margin-top:24px; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.library details > summary { min-height:56px; font-weight:700; padding:14px 0; cursor:pointer; }
.card-count { font-size:.875rem; color:var(--ink-2); font-weight:500; margin-left:12px; }
.library-inner { padding:4px 0 24px; }
.library-inner > .help { max-width:52rem; }
.card-save-row { display:flex; flex-wrap:wrap; align-items:flex-end; gap:12px; margin:20px 0 8px; }
.card-save-row .field { flex:1 1 16rem; max-width:34rem; margin:0; }
.card-save-row input { width:100%; min-height:48px; }
.library-status { font-weight:600; min-height:0; margin:8px 0; }
.library-status:empty { display:none; }
.library-error { color:var(--error); }
.library-confirm,.import-preview { padding:16px; background:var(--surface); border:1px solid var(--line-strong); border-radius:8px; margin:16px 0; max-width:50rem; }
.library-confirm p,.import-preview p { margin:0 0 12px; }
.button-row,.backup-row,.card-actions { display:flex; flex-wrap:wrap; gap:8px; }
.card-list { list-style:none; padding:0; margin:20px 0; }
.card-list li { display:flex; flex-wrap:wrap; justify-content:space-between; align-items:center; gap:12px 24px; padding:16px 0; border-top:1px solid var(--line); }
.card-list li > div:first-child { flex:1 1 22rem; min-width:0; }
.card-list h3 { margin:0 0 4px; font-size:1.0625rem; overflow-wrap:anywhere; }
.card-actions .btn { font-size:.9375rem; padding:8px 12px; }
.card-empty { padding:20px 0; color:var(--ink-2); }
.backup-row { margin:16px 0 8px; align-items:center; }
.backup-row input[type=file] { max-width:100%; width:260px; min-height:44px; font:inherit; font-size:.875rem; }
.library textarea { width:100%; margin-top:8px; font:inherit; font-size:.9375rem; }
.decision-preview figcaption { display:block; }
.decision-preview .pv-note { display:block; margin-top:6px; }
.demo-switch { margin:16px 0; }
.demo-offers { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:18px; }
.demo-offers > div { min-width:0; }
.demo-offers strong { display:block; margin:8px 0 4px; font-size:1.25rem; }
.demo-offers dl { margin:14px 0 0; }
.demo-offers dt { font-size:.875rem; color:var(--ink-2); }
.demo-offers dd { margin:0 0 8px; font-size:1.25rem; font-weight:700; }
.decision-preview .pv-memo { margin-top:14px; }
.evolution-hero { align-items:start; }
.evolution-hero h1 { font-size:clamp(2rem,4vw,3rem); }
.revisit-story { margin-top:36px; display:grid; grid-template-columns:minmax(0,1fr); gap:12px 32px; border-top:1px solid var(--line); padding-top:24px; }
.revisit-story h2 { grid-column:1/-1; }
.revisit-story a { font-weight:700; min-height:44px; display:inline-flex; align-items:center; }
.revisit-story p { margin:0; color:var(--ink-2); font-size:.9375rem; }
.secondary-tasks { display:flex; flex-wrap:wrap; gap:8px 24px; margin-top:20px; }
.secondary-tasks a { min-height:44px; display:inline-flex; align-items:center; font-weight:650; }
@media(min-width:760px) {
 .purchase-grid--2 { grid-template-columns:repeat(2,minmax(0,1fr)); }
 .purchase-grid--3 { grid-template-columns:repeat(3,minmax(0,1fr)); }
 .change-metrics { grid-template-columns:repeat(3,minmax(0,1fr)); }
 .revisit-story { grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media(min-width:960px) {
 .tool--unit .example-box { flex-basis:12rem; }
 .tool--unit .task-switch { margin-bottom:4px; }
 .tool--unit .items .item { padding-top:8px; padding-bottom:8px; }
}
@media(max-width:480px) {
 .task-choice { padding:7px 9px; font-size:.875rem; }
 .change-unit-pair { grid-template-columns:minmax(0,1fr); gap:16px; }
 .required-row { gap:8px; }
 .card-actions { width:100%; }
 .card-actions .btn { flex:1 1 auto; }
 .evolution-hero { gap:24px; }
 .evolution-hero .hero-desc { font-size:1rem; margin-bottom:16px; }
 .demo-offers { gap:10px; }
 .demo-offers strong { font-size:1.0625rem; }
}
@keyframes result-updated { from { border-color:var(--accent); } to { border-color:var(--line); } }
.result-updated { animation:result-updated 180ms ease-out 1; }
@media(prefers-reduced-motion:reduce) { *,*::before,*::after { animation:none!important; transition:none!important; scroll-behavior:auto!important; } }

/* Visitor-flow repair: short decision first, controls next, detail on demand. */
#result-h { scroll-margin-top:16px; }
.decision-card { display:block; }
.decision-card .result-actions { margin:16px 0; }
.need-context { margin:12px 0 0; color:var(--ink-2); }
.purchase-overview { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; margin:16px 0; }
.purchase-mini { min-width:0; padding:12px; border:1px solid var(--line); border-radius:var(--r-sm); background:var(--surface); }
.purchase-mini.best-spend { border-top:3px solid var(--low); }
.purchase-mini h3 { display:flex; align-items:baseline; gap:4px; margin:0 0 12px; font-size:1rem; overflow-wrap:anywhere; }
.purchase-mini .purchase-cost { margin:4px 0 12px; font-size:clamp(1.25rem,2.2vw,1.75rem); }
.purchase-mini .fig-label,.purchase-mini .help { font-size:.875rem; }
.purchase-mini .help { margin:0; }
.purchase-mini .u { font-size:.875rem; font-weight:600; }
.purchase-detail { margin-top:16px; border-top:1px solid var(--line); padding-top:4px; }
.purchase-detail > summary { min-height:44px; }
.decision-card .calc > summary { min-height:44px; }
.btn.btn-small,.store .btn,details.calc > summary { min-height:44px; }
#card-save-hint[hidden] { display:none; }
@media(min-width:760px) {
 .purchase-overview--3 { grid-template-columns:repeat(3,minmax(0,1fr)); }
}
@media(max-width:759px) {
 .item .grid-2 { grid-template-columns:minmax(0,1.6fr) minmax(0,1fr); gap:12px; }
 .item .grid-2 > .field:nth-child(-n+2) { grid-column:1/-1; }
 .result-actions { gap:8px; }
 .result-actions .btn { flex:1 1 auto; padding:8px 12px; font-size:.9375rem; }
 .langs a { min-height:44px; }
 .item-more > summary { min-height:44px; }
 .card-save-row .btn { width:100%; }
 .change-metrics { gap:8px; }
 .change-metric { display:grid; grid-template-columns:auto minmax(0,1fr) minmax(0,1fr); align-items:center; gap:8px; padding:12px 0; }
 .change-metric h3 { margin:0; }
 .change-metric p { text-align:right; font-size:1.25rem; }
}
@media(max-width:359px) {
 .purchase-overview { grid-template-columns:minmax(0,1fr); }
 .purchase-mini { padding:12px 16px; }
}