/* Designer Editorial Art Direction v4 — local, system-font, static-first. */
:root {
  --v4-ink: #172829;
  --v4-ink-2: #365052;
  --v4-paper: #f3f0e8;
  --v4-paper-2: #faf8f3;
  --v4-teal: #276e68;
  --v4-teal-dark: #174e4c;
  --v4-teal-pale: #dce9e4;
  --v4-clay: #a36f55;
  --v4-clay-pale: #e9dfd4;
  --v4-line: #c9cdc5;
  --v4-line-dark: #879795;
  --v4-focus: #006f94;
  --v4-reading: 720px;
  --v4-shell: 1240px;
  --v4-display: "Yu Mincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Noto Serif JP", serif;
  --v4-sans: "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
}

html { background: var(--v4-paper); color: var(--v4-ink); font-family: var(--v4-sans); font-size: 16px; line-height: 1.75; }
body { background: var(--v4-paper); color: var(--v4-ink); }
p { color: var(--v4-ink-2); }
a { color: inherit; text-underline-offset: .28em; }
h1, h2, h3, h4 { color: var(--v4-ink); font-family: var(--v4-display); font-weight: 600; letter-spacing: -.035em; line-height: 1.42; }
:focus-visible { outline: 3px solid var(--v4-focus); outline-offset: 4px; }
::selection { background: #b9d9d1; color: var(--v4-ink); }
.shell { width: min(calc(100% - 64px), var(--v4-shell)); }
.shell--wide { width: min(calc(100% - 44px), 1320px); }

/* Publication masthead, deliberately not a UI toolbar. */
.site-header { position: sticky; top: 0; z-index: 50; border: 0; border-bottom: 1px solid rgba(23, 40, 41, .16); background: rgba(250, 248, 243, .96); box-shadow: none; backdrop-filter: blur(12px); }
.site-header::before { display: none; }
.site-header__inner { min-height: 72px; align-items: center; gap: 38px; padding: 0; }
.brand--editorial { display: flex; min-width: 280px; align-items: center; gap: 15px; color: var(--v4-ink); text-decoration: none; }
.brand__wordmark { display: flex; align-items: baseline; gap: 7px; border-right: 1px solid var(--v4-line); padding-right: 15px; line-height: 1; }
.brand__wordmark b { font-family: Arial, Helvetica, sans-serif; font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.brand__wordmark em { color: var(--v4-teal); font-family: Arial, Helvetica, sans-serif; font-size: 11px; font-style: normal; font-weight: 800; letter-spacing: .12em; }
.brand--editorial > small { color: #657678; font-size: 9px; letter-spacing: .065em; }
.publication-nav { display: flex; margin-left: auto; gap: 2px; }
.publication-nav a { min-height: 44px; display: inline-flex; align-items: center; border: 0; border-radius: 0; padding: 0 13px; color: #3e5557; font-size: 12px; font-weight: 650; text-decoration: none; }
.publication-nav a:hover { background: transparent; color: var(--v4-teal-dark); text-decoration: underline; }
.mobile-publication-nav { display: none; margin-left: auto; }
.mobile-publication-nav summary { min-height: 42px; display: grid; place-items: center; border-bottom: 1px solid var(--v4-ink); color: var(--v4-ink); cursor: pointer; font-size: 12px; list-style: none; }
.mobile-publication-nav summary::-webkit-details-marker { display: none; }
.mobile-publication-nav nav { position: absolute; top: 72px; right: 0; left: 0; display: grid; border-bottom: 1px solid var(--v4-line-dark); padding: 18px 24px 22px; background: var(--v4-paper-2); }
.mobile-publication-nav nav a { border-bottom: 1px solid var(--v4-line); padding: 13px 0; font-size: 14px; text-decoration: none; }

.editorial-kicker { margin: 0 0 18px; color: var(--v4-teal-dark); font-family: Arial, Helvetica, sans-serif; font-size: 10px; font-weight: 800; letter-spacing: .18em; }
.editorial-kicker::before { display: inline-block; width: 24px; height: 1px; margin: 0 11px 3px 0; background: currentColor; content: ""; }
.editorial-text-link { display: inline-flex; gap: 10px; border-bottom: 1px solid var(--v4-ink); padding-bottom: 5px; font-size: 13px; font-weight: 700; text-decoration: none; }
.editorial-section-heading { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 28px; margin-bottom: 44px; }
.editorial-section-heading > span { padding-top: 6px; color: var(--v4-teal); font-family: Arial, sans-serif; font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.editorial-section-heading > div { border-top: 1px solid var(--v4-line-dark); padding-top: 22px; }
.editorial-section-heading p:first-child { margin: 0 0 8px; color: var(--v4-teal-dark); font-family: Arial, sans-serif; font-size: 9px; font-weight: 800; letter-spacing: .16em; }
.editorial-section-heading h2 { max-width: 760px; margin: 0; font-size: clamp(29px, 3vw, 42px); }
.editorial-section-heading h2 + p { max-width: 660px; margin: 12px 0 0; }

/* Home: asymmetric editorial spread. */
.v4-home-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--v4-line); padding: 72px 0 68px; background: var(--v4-paper-2); }
.v4-home-hero::after { position: absolute; top: 0; right: 0; bottom: 0; width: 31%; background: var(--v4-teal-pale); content: ""; }
.v4-home-hero__grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.32fr) minmax(340px, .68fr); align-items: end; gap: 70px; }
.v4-home-hero__copy { padding: 26px 0 10px; }
.v4-home-hero h1 { max-width: 700px; margin: 0 0 22px; font-size: clamp(48px, 5.7vw, 74px); font-weight: 500; line-height: 1.2; letter-spacing: -.075em; }
.v4-home-hero__lead { max-width: 660px; margin: 0 0 28px; font-size: 16px; line-height: 2; }
.v4-home-note { position: relative; border-top: 5px solid var(--v4-teal-dark); padding: 31px 30px 29px; background: var(--v4-ink); color: #fff; }
.v4-home-note__number { display: block; margin-bottom: 25px; color: #9dc1bc; font-family: Arial, sans-serif; font-size: 9px; letter-spacing: .18em; }
.v4-home-note h2 { margin: 20px 0 13px; color: #fff; font-family: var(--v4-display); font-size: 27px; font-weight: 500; line-height: 1.55; }
.v4-home-note p { color: #c3cfce; font-size: 12px; line-height: 1.9; }
.v4-home-note dl { display: flex; gap: 28px; margin: 25px 0 0; border-top: 1px solid rgba(255,255,255,.15); padding-top: 18px; }
.v4-home-note dl div { display: grid; }
.v4-home-note dt { color: #93a6a5; font-size: 9px; letter-spacing: .1em; }
.v4-home-note dd { margin: 0; color: #fff; font-family: Georgia, serif; font-size: 28px; }
.category-signal { display: flex; align-items: flex-end; gap: 7px; height: 44px; }
.category-signal i { width: 1px; background: #74a39e; }
.category-signal i:nth-child(1) { height: 24px; }.category-signal i:nth-child(2) { height: 44px; }.category-signal i:nth-child(3) { height: 33px; }
.v4-category-ledger { padding: 96px 0 104px; }
.category-ledger { border-top: 1px solid var(--v4-line-dark); }
.category-ledger__item { display: grid; grid-template-columns: 180px 1fr auto; align-items: center; gap: 36px; border-bottom: 1px solid var(--v4-line-dark); padding: 37px 12px 37px 0; color: var(--v4-ink); text-decoration: none; transition: padding .18s ease, background .18s ease; }
.category-ledger__item:hover { padding-left: 18px; background: rgba(255,255,255,.42); }
.category-ledger__item > span { color: var(--v4-teal-dark); font-family: Arial, sans-serif; font-size: 9px; font-weight: 800; letter-spacing: .16em; }
.category-ledger__item h3 { margin: 0 0 8px; font-size: clamp(27px, 3vw, 40px); font-weight: 500; line-height: 1.35; }
.category-ledger__item p { max-width: 620px; margin: 0; font-size: 13px; }
.category-ledger__item > b { align-self: end; color: var(--v4-teal-dark); font-size: 12px; }
.category-ledger__item--underwear > span, .category-ledger__item--underwear > b { color: #7d5744; }
.v4-editorial-principles { border-block: 1px solid var(--v4-line); padding: 90px 0; background: #ebe8df; }
.editorial-note-list { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; list-style: none; }
.editorial-note-list li { min-height: 185px; border-left: 1px solid var(--v4-line-dark); padding: 6px 34px 22px; }
.editorial-note-list li:last-child { border-right: 1px solid var(--v4-line-dark); }
.editorial-note-list span { color: var(--v4-teal); font-family: Arial, sans-serif; font-size: 10px; }
.editorial-note-list h3 { margin: 34px 0 8px; font-size: 22px; }
.editorial-note-list p { margin: 0; font-size: 13px; line-height: 1.9; }
.v4-reading-entry { padding: 96px 0 116px; }
.reading-index { display: grid; grid-template-columns: 1.15fr .85fr .85fr; border-top: 1px solid var(--v4-line-dark); }
.reading-index a { min-height: 260px; display: flex; flex-direction: column; border-right: 1px solid var(--v4-line); border-bottom: 1px solid var(--v4-line-dark); padding: 28px 28px 24px; text-decoration: none; }
.reading-index a:first-child { border-left: 1px solid var(--v4-line); }
.reading-index small { color: var(--v4-teal-dark); font-size: 10px; font-weight: 700; }
.reading-index h3 { margin: 42px 0 24px; font-size: 21px; font-weight: 500; }
.reading-index span { margin-top: auto; font-size: 12px; font-weight: 700; }

/* Category spread. */
.v4-category-hero { border-bottom: 1px solid var(--v4-line); padding: 64px 0 74px; background: var(--v4-paper-2); }
.v4-category-hero__grid { display: grid; grid-template-columns: minmax(0, 1fr) 330px; align-items: end; gap: 80px; }
.v4-category-hero .breadcrumbs, .v4-compare-intro .breadcrumbs, .v4-product-hero .breadcrumbs { margin: 0 0 42px; font-size: 11px; }
.v4-category-hero h1 { max-width: 780px; margin: 0 0 23px; font-size: clamp(43px, 5vw, 65px); font-weight: 500; line-height: 1.28; }
.v4-category-hero h1 + p { max-width: 720px; font-size: 15px; line-height: 2; }
.v4-category-actions { display: flex; gap: 24px; margin-top: 30px; }
.v4-category-actions a { border-bottom: 1px solid var(--v4-ink); padding: 8px 0; font-size: 13px; font-weight: 700; text-decoration: none; }
.category-linework { position: relative; height: 330px; overflow: hidden; border: 1px solid var(--v4-line-dark); background: var(--v4-teal-pale); }
.category-linework i { position: absolute; display: block; border: 1px solid rgba(23,78,76,.45); }
.category-linework i:nth-child(1) { inset: 36px 62px 76px 54px; transform: rotate(-8deg); }
.category-linework i:nth-child(2) { inset: 66px 28px 45px 100px; transform: rotate(11deg); }
.category-linework i:nth-child(3) { top: 0; bottom: 0; left: 48%; width: 1px; border: 0; background: rgba(23,78,76,.38); }
.category-linework span { position: absolute; right: 18px; bottom: 7px; color: rgba(23,78,76,.28); font-family: Georgia, serif; font-size: 78px; }
.category-linework--underwear { background: var(--v4-clay-pale); }
.category-linework--underwear i { border-radius: 44% 44% 15% 15%; border-color: rgba(125,87,68,.38); }
.v4-question-ledger { padding: 90px 0 84px; }
.v4-question-ledger ol { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--v4-line-dark); margin: 0; padding: 0; list-style: none; }
.v4-question-ledger li { min-height: 140px; display: flex; flex-direction: column; border-right: 1px solid var(--v4-line); padding: 25px 28px; font-family: var(--v4-display); font-size: 19px; }
.v4-question-ledger li:last-child { border-right: 0; }
.v4-question-ledger li span { margin-bottom: 28px; color: var(--v4-teal); font-family: Arial, sans-serif; font-size: 9px; }
.v4-product-index { border-top: 1px solid var(--v4-line); padding: 96px 0 108px; background: #faf8f3; }
.editorial-product-list { border-top: 1px solid var(--v4-line-dark); }
.editorial-product-row { display: grid; grid-template-columns: 54px minmax(250px, 1.1fr) minmax(350px, 1fr) auto; align-items: center; gap: 26px; border-bottom: 1px solid var(--v4-line); padding: 26px 8px 26px 0; }
.editorial-product-row__number { color: var(--v4-teal); font-family: Georgia, serif; font-size: 17px; }
.editorial-product-row__identity small { color: var(--v4-teal-dark); font-family: Arial, sans-serif; font-size: 9px; font-weight: 800; letter-spacing: .12em; }
.editorial-product-row__identity h3 { margin: 3px 0 2px; font-family: var(--v4-sans); font-size: 16px; font-weight: 700; letter-spacing: -.015em; }
.editorial-product-row__identity p { margin: 0; color: #738080; font-family: Arial, sans-serif; font-size: 10px; }
.editorial-product-row ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; margin: 0; padding: 0; list-style: none; }
.editorial-product-row li > span { display: block; margin-bottom: 3px; color: #617171; font-size: 9px; }
.editorial-product-row > a { font-size: 11px; font-weight: 700; text-decoration: none; }
.v4-guide-index { border-top: 1px solid var(--v4-line); padding: 90px 0 105px; }
.v4-guide-index > .shell > div:last-child { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--v4-line-dark); }
.v4-guide-index a { min-height: 120px; border-right: 1px solid var(--v4-line); border-bottom: 1px solid var(--v4-line-dark); padding: 25px; font-family: var(--v4-display); font-size: 17px; text-decoration: none; }

/* Evidence states: typography first, never colour alone. */
.evidence-state { display: inline-grid; grid-template-columns: 8px auto; align-items: start; gap: 7px; color: var(--v4-ink); font-size: 12px; line-height: 1.55; }
.evidence-state i { width: 7px; height: 7px; margin-top: .46em; border: 1px solid currentColor; border-radius: 50%; background: transparent; }
.evidence-state small { grid-column: 2; color: #637274; font-size: 10px; }
.evidence-state--confirmed { color: var(--v4-teal-dark); }
.evidence-state--confirmed i { background: var(--v4-teal); }
.evidence-state--conditional { color: #866347; }
.evidence-state--conditional i { border-radius: 0; transform: rotate(45deg); background: #ba8a5f; }
.evidence-state--unverified { color: #6c7777; }
.evidence-state--unverified i { border-style: dotted; }
.evidence-state--restricted { color: #744b46; }
.evidence-state--restricted i { border-radius: 0; background: #9b5d56; }
.evidence-state--conflict { color: #8a3d45; }
.evidence-state--compact { font-size: 10px; }
.evidence-state--compact small { font-size: 9px; }

/* Comparison: one matrix, one compact index, disclosure on mobile. */
.v4-compare-intro { border-bottom: 1px solid var(--v4-line); padding: 60px 0 52px; background: var(--v4-paper-2); }
.v4-compare-intro__grid { display: grid; grid-template-columns: 1.15fr .85fr; align-items: end; gap: 80px; }
.v4-compare-intro h1 { margin: 0; font-size: clamp(40px, 4.4vw, 58px); font-weight: 500; line-height: 1.28; }
.v4-compare-intro__grid > p { max-width: 570px; margin: 0 0 8px; font-size: 14px; line-height: 2; }
.v4-compare-controls { position: sticky; top: 72px; z-index: 30; border-bottom: 1px solid var(--v4-line-dark); background: rgba(243,240,232,.97); backdrop-filter: blur(10px); }
.v4-compare-controls > .shell { min-height: 88px; display: grid; grid-template-columns: 170px 1fr; align-items: center; gap: 28px; }
.v4-compare-controls > .shell > div:first-child { border-right: 1px solid var(--v4-line); }
.v4-compare-controls span { font-size: 11px; font-weight: 750; }
.v4-compare-controls p { margin: 1px 0 0; color: #718080; font-size: 10px; }
.compare-controls__buttons { display: flex; flex-wrap: wrap; gap: 7px; }
.compare-controls__buttons button { min-height: 40px; border: 1px solid var(--v4-line-dark); border-radius: 0; padding: 7px 13px; background: transparent; color: var(--v4-ink); font: 650 11px var(--v4-sans); cursor: pointer; }
.compare-controls__buttons button[aria-pressed="true"] { background: var(--v4-ink); color: #fff; }
.compare-controls__buttons .compare-controls__reset { margin-left: auto; border-color: transparent; border-bottom-color: var(--v4-line-dark); }
.v4-matrix-section { padding: 64px 0 82px; }
.v4-matrix-wrap { overflow: clip; border-block: 1px solid var(--v4-line-dark); }
.v4-comparison-matrix { width: 100%; border-collapse: collapse; table-layout: fixed; background: transparent; }
.v4-comparison-matrix caption { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.v4-comparison-matrix th, .v4-comparison-matrix td { border: 0; border-bottom: 1px solid var(--v4-line); padding: 18px 14px; text-align: left; vertical-align: top; }
.v4-comparison-matrix thead th { border-bottom: 1px solid var(--v4-line-dark); color: #586b6b; font-size: 9px; font-weight: 750; letter-spacing: .03em; }
.v4-comparison-matrix th:first-child { width: 28%; }
.v4-comparison-matrix tbody th { font-weight: 400; }
.v4-comparison-matrix tbody th small { display: block; color: var(--v4-teal-dark); font-family: Arial, sans-serif; font-size: 8px; font-weight: 800; letter-spacing: .1em; }
.v4-comparison-matrix tbody th a { display: block; margin: 4px 0 2px; font-size: 12px; font-weight: 700; line-height: 1.55; text-decoration: none; }
.v4-comparison-matrix tbody th span { color: #748181; font-family: Arial, sans-serif; font-size: 9px; }
.v4-comparison-matrix tr[hidden], .mobile-compare-item[hidden] { display: none; }
.v4-mobile-comparison { display: none; }
.filter-empty { border-block: 1px solid var(--v4-line-dark); padding: 32px 0; }
.v4-compare-index { border-top: 1px solid var(--v4-line); padding: 88px 0 98px; background: var(--v4-paper-2); }
.v4-compare-index > .shell > div:last-child { border-top: 1px solid var(--v4-line-dark); }
.compare-product-link { display: grid; grid-template-columns: 48px 1fr auto; align-items: center; gap: 20px; border-bottom: 1px solid var(--v4-line); padding: 18px 5px 18px 0; text-decoration: none; }
.compare-product-link > span { color: var(--v4-teal); font-family: Georgia, serif; }
.compare-product-link div { display: grid; grid-template-columns: 160px minmax(0, 1fr) 190px; align-items: baseline; gap: 20px; }
.compare-product-link small { color: var(--v4-teal-dark); font-size: 9px; font-weight: 750; }
.compare-product-link b { font-size: 13px; }
.compare-product-link em { color: #728080; font-family: Arial, sans-serif; font-size: 9px; font-style: normal; }
.v4-method-note { border-top: 1px solid var(--v4-line-dark); padding: 40px 0 52px; }
.v4-method-note .shell { display: grid; grid-template-columns: 100px 1fr auto; gap: 30px; }
.v4-method-note span { color: var(--v4-teal); font-family: Arial, sans-serif; font-size: 9px; font-weight: 800; letter-spacing: .15em; }
.v4-method-note p { max-width: 760px; margin: 0; font-size: 12px; }
.v4-method-note a { font-size: 11px; font-weight: 700; text-decoration: none; }

/* Product dossier: editorial art, grouped facts, independent commerce. */
.v4-product-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--v4-line); padding: 62px 0 70px; background: var(--v4-paper-2); }
.v4-product-hero::after { position: absolute; top: 0; right: 0; bottom: 0; width: 30%; background: var(--v4-teal-pale); content: ""; }
.v4-product-hero--underwear::after { background: var(--v4-clay-pale); }
.v4-product-hero__grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.25fr) 340px; align-items: end; gap: 75px; }
.v4-product-hero h1 { max-width: 850px; margin: 0 0 13px; font-size: clamp(38px, 4.4vw, 57px); font-weight: 500; line-height: 1.3; }
.product-model { margin: 0; color: #667777; font: 700 10px/1.4 Arial, sans-serif; letter-spacing: .12em; }
.product-position { max-width: 650px; margin: 25px 0; font-size: 14px; }
.product-key-facts { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--v4-line-dark); margin: 0; padding: 0; list-style: none; }
.product-key-facts li { min-height: 100px; border-right: 1px solid var(--v4-line); padding: 17px 16px; }
.product-key-facts li:last-child { border-right: 0; }
.product-key-facts li > span { display: block; margin-bottom: 9px; color: #657474; font-size: 9px; }
.editorial-product-art { position: relative; height: 330px; overflow: hidden; border: 1px solid var(--v4-line-dark); background: #d5e6e1; }
.editorial-product-art i { position: absolute; display: block; border: 1px solid rgba(23,78,76,.48); }
.editorial-product-art i:nth-child(1) { inset: 34px 52px 56px 74px; transform: skew(-7deg); }
.editorial-product-art i:nth-child(2) { inset: 74px 95px 28px 33px; transform: skew(9deg); }
.editorial-product-art i:nth-child(3) { top: 0; bottom: 0; left: 50%; width: 1px; border: 0; background: rgba(23,78,76,.35); }
.editorial-product-art span { position: absolute; right: 15px; bottom: 12px; color: rgba(23,78,76,.45); font: 800 9px Arial, sans-serif; letter-spacing: .16em; }
.editorial-product-art--underwear { background: #e8ddd1; }
.editorial-product-art--underwear i { border-radius: 42% 42% 12% 12%; border-color: rgba(125,87,68,.43); }
.v4-product-body { padding: 78px 0 108px; }
.v4-product-layout { display: grid; grid-template-columns: minmax(0, 1fr) 310px; align-items: start; gap: 58px; }
.editorial-interpretation { border-left: 4px solid var(--v4-teal); margin-bottom: 62px; padding: 5px 0 5px 27px; }
.editorial-interpretation > span, .official-evidence > span, .commerce-label { color: var(--v4-teal-dark); font: 800 9px Arial, sans-serif; letter-spacing: .15em; text-transform: uppercase; }
.editorial-interpretation h2 { margin: 8px 0 8px; font-size: 29px; }
.editorial-interpretation p { max-width: 690px; margin: 0; }
.editorial-interpretation ul { margin: 15px 0 0; padding-left: 1.3em; color: #5e6e6e; font-size: 12px; }
.product-fact-group { border-top: 1px solid var(--v4-line-dark); padding: 30px 0 42px; }
.product-fact-group > header { display: grid; grid-template-columns: 46px 1fr; align-items: baseline; gap: 18px; margin-bottom: 13px; }
.product-fact-group > header span { color: var(--v4-teal); font-family: Georgia, serif; font-size: 13px; }
.product-fact-group h2 { margin: 0; font-size: 25px; }
.product-fact-group dl { margin: 0 0 0 64px; }
.product-fact-group dl > div { display: grid; grid-template-columns: 210px 1fr; gap: 24px; border-bottom: 1px solid var(--v4-line); padding: 13px 0; }
.product-fact-group dt { color: #5f7070; font-size: 11px; }
.product-fact-group dd { margin: 0; }
.official-evidence { border-top: 1px solid var(--v4-line-dark); margin-top: 18px; padding: 35px 0; }
.official-evidence h2 { margin: 8px 0 7px; font-size: 27px; }
.official-evidence p { max-width: 660px; }
.official-evidence a { display: inline-block; border-bottom: 1px solid var(--v4-ink); padding-bottom: 4px; font-size: 12px; font-weight: 700; text-decoration: none; }
.official-evidence small { display: block; margin-top: 15px; color: #677777; font-size: 10px; }
.commerce-card { position: sticky; top: 184px; margin: 0; border: 0; border-top: 4px solid var(--v4-ink); border-radius: 0; padding: 27px 25px; background: #e9e5da; box-shadow: none; }
.commerce-card h2 { margin: 9px 0 11px; font-family: var(--v4-sans); font-size: 18px; font-weight: 750; line-height: 1.55; }
.commerce-card p { font-size: 11px; }
.commerce-card small { display: block; margin-top: 15px; color: #687676; font-size: 9px; }
.commerce-card--inactive { border-top-color: var(--v4-line-dark); background: transparent; }
.amazon-cta { min-height: 46px; border-radius: 0; background: var(--v4-teal-dark); font-size: 12px; }

/* Existing guides and trust routes enter the same publication rhythm. */
.editorial-article { padding-bottom: 110px; }
.editorial-article > .breadcrumbs { width: min(calc(100% - 64px), var(--v4-reading)); margin-top: 40px; }
.article-hero { width: min(calc(100% - 64px), 800px); padding: 64px 0 48px; }
.article-hero h1 { margin: 12px 0 24px; font-size: clamp(40px, 4.6vw, 57px); font-weight: 500; line-height: 1.42; }
.article-lead { max-width: var(--v4-reading); font-size: 17px; line-height: 2; }
.article-meta { border-top: 1px solid var(--v4-line-dark); margin-top: 28px; padding-top: 15px; font-size: 10px; }
.key-takeaway { width: min(calc(100% - 64px), 800px); margin-bottom: 54px; border: 0; border-left: 4px solid var(--v4-teal); border-radius: 0; padding: 28px 32px; background: var(--v4-teal-pale); box-shadow: none; }
.article-body { width: min(calc(100% - 64px), var(--v4-reading)); }
.article-section { grid-template-columns: 42px 1fr; gap: 24px; border-top: 1px solid var(--v4-line); padding: 54px 0; }
.article-section h2 { font-size: 29px; }
.article-section p { font-size: 17px; line-height: 2.05; }
.article-limitation { border: 0; border-left: 3px solid var(--v4-clay); border-radius: 0; padding: 28px 30px; background: var(--v4-clay-pale); }
.article-sources { border-top: 1px solid var(--v4-line-dark); padding-top: 46px; }
.article-sources li, .related-link { border-radius: 0; }
.trust-hero, .page-hero { border-color: var(--v4-line); background: var(--v4-paper-2); }
.trust-card, .content-card { border-radius: 0; box-shadow: none; }

/* Footer: disclosure reads like publication information, not system status. */
.site-footer { border: 0; padding: 62px 0 42px; background: #152526; }
.site-footer::before { display: none; }
.editorial-footer { display: grid; grid-template-columns: 1.5fr .65fr .9fr; gap: 60px; border-top: 1px solid rgba(255,255,255,.2); padding-top: 36px; }
.editorial-footer__brand b { color: #f3f0e8; font: 800 11px Arial, sans-serif; letter-spacing: .13em; }
.editorial-footer__brand p { margin: 20px 0 6px; color: #f2eee5; font-family: var(--v4-display); font-size: 19px; }
.editorial-footer__brand small { color: #9fb0ae; font-size: 10px; }
.editorial-footer nav { display: grid; align-content: start; gap: 7px; }
.editorial-footer nav b { margin-bottom: 8px; color: #8eaaa7; font: 800 9px Arial, sans-serif; letter-spacing: .14em; }
.editorial-footer nav a { color: #d3dddb; font-size: 11px; text-decoration: none; }
.site-amazon-disclosure { width: min(calc(100% - 64px), var(--v4-shell)); display: grid; grid-template-columns: 150px 1fr; gap: 24px; margin: 36px auto 0; border-top: 1px solid rgba(255,255,255,.12); padding-top: 20px; background: none; }
.site-amazon-disclosure span { color: #c5d1cf; font-size: 9px; font-weight: 700; }
.site-amazon-disclosure p { margin: 0; color: #91a5a3; font-size: 9px; }

@media (max-width: 1100px) {
  .shell { width: min(calc(100% - 48px), var(--v4-shell)); }
  .brand--editorial { min-width: auto; }
  .brand--editorial > small { display: none; }
  .v4-home-hero__grid { grid-template-columns: 1.2fr .8fr; gap: 42px; }
  .v4-home-hero h1 { font-size: 56px; }
  .category-ledger__item { grid-template-columns: 130px 1fr auto; }
  .v4-category-hero__grid, .v4-product-hero__grid { grid-template-columns: 1fr 290px; gap: 45px; }
  .editorial-product-row { grid-template-columns: 44px minmax(250px, 1fr) minmax(300px, .9fr) auto; gap: 18px; }
  .v4-comparison-matrix th, .v4-comparison-matrix td { padding-inline: 10px; }
}

@media (max-width: 900px) {
  .publication-nav { display: none; }
  .mobile-publication-nav { display: block; }
  .site-header .mobile-publication-nav nav a { display: inline-flex; }
  .v4-home-hero::after, .v4-product-hero::after { display: none; }
  .v4-home-hero__grid, .v4-category-hero__grid, .v4-product-hero__grid { grid-template-columns: 1fr; }
  .v4-home-note { max-width: 620px; }
  .category-linework, .editorial-product-art { width: min(100%, 520px); height: 240px; }
  .editorial-product-row { grid-template-columns: 42px 1fr auto; }
  .editorial-product-row ul { grid-column: 2 / -1; }
  .v4-compare-intro__grid { grid-template-columns: 1fr; gap: 20px; }
  .v4-comparison-matrix th:first-child { width: 27%; }
  .v4-product-layout { grid-template-columns: 1fr; }
  .commerce-card { position: static; max-width: 640px; }
  .reading-index { grid-template-columns: 1fr 1fr; }
  .reading-index a:first-child { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  html { font-size: 15px; }
  .shell, .shell--wide { width: min(calc(100% - 32px), var(--v4-shell)); }
  .site-header__inner { min-height: 62px; }
  .brand__wordmark { border: 0; padding: 0; }
  .brand__wordmark b { font-size: 9px; }
  .brand__wordmark em { font-size: 9px; }
  .mobile-publication-nav nav { top: 62px; }
  .editorial-section-heading { grid-template-columns: 32px 1fr; gap: 15px; margin-bottom: 30px; }
  .editorial-section-heading > div { padding-top: 15px; }
  .editorial-section-heading h2 { font-size: 28px; }
  .v4-home-hero { padding: 46px 0 42px; }
  .v4-home-hero__grid { gap: 28px; }
  .v4-home-hero h1 { font-size: clamp(39px, 12vw, 49px); line-height: 1.24; }
  .v4-home-hero__lead { font-size: 14px; line-height: 1.9; }
  .v4-home-note { padding: 26px 23px 22px; }
  .v4-category-ledger, .v4-reading-entry { padding: 66px 0 78px; }
  .category-ledger__item { grid-template-columns: 1fr auto; gap: 12px; padding: 28px 0; }
  .category-ledger__item > span { grid-column: 1 / -1; }
  .category-ledger__item h3 { font-size: 28px; }
  .category-ledger__item > b { font-size: 10px; }
  .v4-editorial-principles { padding: 64px 0; }
  .editorial-note-list { grid-template-columns: 1fr; }
  .editorial-note-list li { min-height: 0; border-right: 1px solid var(--v4-line-dark); border-bottom: 1px solid var(--v4-line-dark); padding: 22px; }
  .editorial-note-list h3 { margin-top: 15px; }
  .reading-index { grid-template-columns: 1fr; }
  .reading-index a, .reading-index a:first-child { grid-column: auto; min-height: 190px; border-left: 1px solid var(--v4-line); }
  .reading-index h3 { margin-top: 25px; }
  .v4-category-hero { padding: 42px 0 50px; }
  .v4-category-hero .breadcrumbs, .v4-compare-intro .breadcrumbs, .v4-product-hero .breadcrumbs { margin-bottom: 30px; }
  .v4-category-hero h1 { font-size: 38px; }
  .v4-category-actions { flex-direction: column; align-items: flex-start; gap: 8px; }
  .category-linework { height: 180px; }
  .v4-question-ledger, .v4-product-index, .v4-guide-index { padding: 64px 0 72px; }
  .v4-question-ledger ol { grid-template-columns: 1fr; }
  .v4-question-ledger li { min-height: 0; border-right: 0; border-bottom: 1px solid var(--v4-line); padding: 20px 8px; }
  .v4-question-ledger li span { margin-bottom: 12px; }
  .editorial-product-row { grid-template-columns: 34px 1fr; padding: 22px 0; }
  .editorial-product-row ul { grid-column: 2; grid-template-columns: 1fr; gap: 8px; }
  .editorial-product-row > a { grid-column: 2; }
  .v4-guide-index > .shell > div:last-child { grid-template-columns: 1fr; }
  .v4-guide-index a { min-height: 92px; border-left: 1px solid var(--v4-line); }
  .v4-compare-intro { padding: 42px 0 38px; }
  .v4-compare-intro h1 { font-size: 37px; }
  .v4-compare-controls { top: 62px; }
  .v4-compare-controls > .shell { min-height: 0; grid-template-columns: 1fr; gap: 10px; padding: 15px 0; }
  .v4-compare-controls > .shell > div:first-child { display: flex; justify-content: space-between; border: 0; }
  .compare-controls__buttons { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 3px; scrollbar-width: thin; }
  .compare-controls__buttons button { flex: 0 0 auto; }
  .compare-controls__buttons .compare-controls__reset { margin-left: 0; }
  .v4-matrix-section { padding: 36px 0 54px; }
  .v4-matrix-wrap { display: none; }
  .v4-mobile-comparison { display: grid; border-top: 1px solid var(--v4-line-dark); }
  .mobile-compare-item { border-bottom: 1px solid var(--v4-line-dark); padding: 25px 0 22px; }
  .mobile-compare-item > header { display: grid; grid-template-columns: 42px 1fr; gap: 10px; margin-bottom: 18px; }
  .mobile-compare-item > header > span { padding-top: 4px; color: var(--v4-teal); font: 12px Georgia, serif; }
  .mobile-compare-item header small { color: var(--v4-teal-dark); font-size: 8px; font-weight: 800; letter-spacing: .12em; }
  .mobile-compare-item h2 { margin: 3px 0; font-family: var(--v4-sans); font-size: 17px; font-weight: 750; }
  .mobile-compare-item header p { margin: 0; color: #748181; font: 9px Arial, sans-serif; }
  .mobile-compare-item dl { margin: 0; }
  .mobile-compare-item dl > div { display: grid; grid-template-columns: 125px 1fr; gap: 13px; border-top: 1px solid var(--v4-line); padding: 10px 0; }
  .mobile-compare-item dt { color: #5f7070; font-size: 10px; }
  .mobile-compare-item dd { margin: 0; }
  .mobile-compare-item details { border-top: 1px solid var(--v4-line-dark); margin-top: 8px; }
  .mobile-compare-item summary { min-height: 44px; display: flex; align-items: center; color: var(--v4-teal-dark); cursor: pointer; font-size: 11px; font-weight: 700; }
  .mobile-compare-item > a { display: inline-block; margin-top: 15px; border-bottom: 1px solid var(--v4-ink); padding-bottom: 3px; font-size: 11px; font-weight: 700; text-decoration: none; }
  .v4-compare-index { padding: 60px 0 70px; }
  .v4-compare .v4-compare-index { display: none; }
  .compare-product-link { grid-template-columns: 34px 1fr auto; gap: 10px; }
  .compare-product-link div { grid-template-columns: 1fr; gap: 2px; }
  .v4-method-note .shell { grid-template-columns: 1fr; gap: 9px; }
  .v4-product-hero { padding: 42px 0 50px; }
  .v4-product-hero h1 { font-size: 35px; }
  .product-key-facts { grid-template-columns: 1fr; }
  .product-key-facts li { min-height: 0; border-right: 0; border-bottom: 1px solid var(--v4-line); padding: 13px 0; }
  .product-key-facts li:last-child { border-bottom: 0; }
  .editorial-product-art { height: 180px; }
  .v4-product-body { padding: 54px 0 76px; }
  .editorial-interpretation { padding-left: 20px; }
  .product-fact-group { padding: 25px 0 33px; }
  .product-fact-group > header { grid-template-columns: 32px 1fr; gap: 10px; }
  .product-fact-group dl { margin-left: 42px; }
  .product-fact-group dl > div { grid-template-columns: 1fr; gap: 3px; }
  .article-hero, .key-takeaway, .article-body, .editorial-article > .breadcrumbs { width: min(calc(100% - 32px), var(--v4-reading)); }
  .article-hero { padding: 42px 0 34px; }
  .article-hero h1 { font-size: 34px; }
  .article-lead, .article-section p { font-size: 16px; }
  .key-takeaway { padding: 23px 20px; }
  .article-section { grid-template-columns: 1fr; gap: 7px; padding: 40px 0; }
  .article-section h2 { font-size: 25px; }
  .site-footer { padding-top: 45px; }
  .editorial-footer { grid-template-columns: 1fr 1fr; gap: 38px 25px; }
  .editorial-footer__brand { grid-column: 1 / -1; }
  .site-amazon-disclosure { width: calc(100% - 32px); grid-template-columns: 1fr; gap: 7px; }
}

@media (max-width: 390px) {
  .brand__wordmark { gap: 4px; }
  .v4-home-hero h1 { font-size: 39px; }
  .v4-category-hero h1, .v4-compare-intro h1 { font-size: 35px; }
  .mobile-compare-item dl > div { grid-template-columns: 112px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}