:root {
  color-scheme: light;
  --color-background: #F4F1EA;
  --color-surface: #FFFFFF;
  --color-text: #151A24;
  --color-muted: #555B64;
  --color-primary: #3157E5;
  --color-primary-dark: #213C9F;
  --color-lime: #C9E84F;
  --color-pale-blue: #DDE8FF;
  --color-danger: #E86A52;
  --color-line: #D8D4CA;
  --color-line-dark: #A9A69E;
  --color-ink-soft: #2A303B;
  --radius-small: 6px;
  --radius-medium: 12px;
  --space-1: .5rem;
  --space-2: .75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 5rem;
  --content-width: 1240px;
  --reading-width: 720px;
  --transition: 160ms ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--color-background); color: var(--color-text); font-family: Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif; font-size: 16px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
a { color: var(--color-primary-dark); text-underline-offset: 3px; }
a:hover { color: var(--color-primary); }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--color-lime); outline-offset: 3px; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; transform: translateY(-140%); padding: 8px 12px; background: var(--color-text); color: white; }
.skip-link:focus { transform: none; }
.page-shell, .home-hero, .home-section, .diagnosis-section { width: min(calc(100% - 44px), var(--content-width)); margin-inline: auto; }
.muted, .meta { color: var(--color-muted); }

.site-header { position: sticky; top: 0; z-index: 30; border-bottom: 1px solid var(--color-line); background: rgba(244,241,234,.96); }
.site-header-inner { display: flex; width: min(calc(100% - 44px), var(--content-width)); min-height: 76px; margin-inline: auto; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--color-text); text-decoration: none; }
.brand-mark { display: grid; width: 42px; height: 42px; place-items: center; border: 2px solid var(--color-text); background: var(--color-lime); font-family: Georgia, "Yu Mincho", serif; font-size: .9rem; font-weight: 900; line-height: 1; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: .85rem; letter-spacing: .01em; }
.brand small { color: var(--color-muted); font-size: .57rem; font-weight: 800; letter-spacing: .13em; }
.global-nav { display: flex; align-items: center; gap: 24px; }
.global-nav a { color: var(--color-text); font-size: .76rem; font-weight: 800; text-decoration: none; }
.global-nav .nav-cta { padding: 9px 14px; border: 1px solid var(--color-text); background: var(--color-text); color: white; }

.eyebrow, .issue-label { color: var(--color-primary-dark); font-size: .68rem; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.issue-label { display: inline-block; padding: 4px 8px; background: var(--color-lime); color: var(--color-text); }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 9px; padding: 11px 18px; border: 1px solid var(--color-text); border-radius: var(--radius-small); font-size: .85rem; font-weight: 850; line-height: 1.25; text-decoration: none; cursor: pointer; transition: transform var(--transition), background var(--transition), color var(--transition); }
.button:hover { transform: translateY(-1px); }
.button-primary { background: var(--color-primary); border-color: var(--color-primary); color: white; }
.button-primary:hover { background: var(--color-primary-dark); color: white; }
.button-block { width: 100%; }
.text-link { font-size: .82rem; font-weight: 850; text-decoration-thickness: 1px; }
.pill { display: inline-flex; align-items: center; padding: 4px 9px; border: 1px solid var(--color-line-dark); border-radius: 999px; background: transparent; color: var(--color-ink-soft); font-size: .66rem; font-weight: 750; line-height: 1.2; }
.pill-pr { border-color: var(--color-danger); background: white; color: #A23C2B; }
.pill-mint { border-color: #9CB737; background: var(--color-lime); }
.condition-tags, .pill-row { display: flex; flex-wrap: wrap; gap: 7px; }

.home-hero { display: grid; min-height: 650px; grid-template-columns: minmax(0, 1fr) minmax(420px, .85fr); gap: clamp(60px, 8vw, 120px); align-items: center; padding-block: 90px; }
.hero-copy h1 { max-width: 720px; margin: 24px 0 26px; font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(4rem, 7vw, 7rem); font-weight: 500; line-height: .98; letter-spacing: -.055em; }
.hero-copy h1 em { color: var(--color-primary); font-style: normal; }
.hero-copy > p { max-width: 600px; color: var(--color-ink-soft); font-size: 1.08rem; }
.hero-copy .hero-question { margin: 18px 0 -8px; color: var(--color-text); font-weight: 760; font-size: clamp(1rem, 2vw, 1.2rem); }
.hero-actions { display: flex; gap: 20px; align-items: center; margin-top: 32px; }
.privacy-note { color: var(--color-muted); font-size: .7rem !important; }
.hero-ledger { border-top: 5px solid var(--color-text); border-bottom: 1px solid var(--color-text); background: var(--color-surface); }
.hero-ledger > .eyebrow { display: block; padding: 18px 22px; border-bottom: 1px solid var(--color-line); }
.ledger-formula { display: grid; grid-template-columns: 1fr auto 1fr; padding: 22px; align-items: center; }
.ledger-formula div { padding: 14px 4px; border-bottom: 1px solid var(--color-line); }
.ledger-formula div:nth-of-type(3), .ledger-formula div:nth-of-type(4) { border-bottom: 0; }
.ledger-formula b { padding-inline: 12px; color: var(--color-primary); font-size: 1.5rem; }
.ledger-formula small, .ledger-formula strong { display: block; }
.ledger-formula small { color: var(--color-muted); font-size: .58rem; letter-spacing: .12em; }
.ledger-formula strong { font-size: .95rem; }
.ledger-total { display: flex; align-items: end; justify-content: space-between; padding: 18px 22px; background: var(--color-pale-blue); }
.ledger-total span { font-weight: 850; }
.ledger-total strong { font-family: Georgia, serif; font-size: 1.4rem; }

.diagnosis-section { padding-block: 86px; border-top: 1px solid var(--color-text); scroll-margin-top: 80px; }
.diagnosis-heading { display: grid; grid-template-columns: 1fr minmax(320px, .7fr); gap: 50px; align-items: end; margin-bottom: 34px; }
.diagnosis-heading h2 { margin: 9px 0 0; font-family: Georgia, "Yu Mincho", serif; font-size: clamp(2.6rem, 5vw, 5.2rem); font-weight: 500; line-height: 1; letter-spacing: -.045em; }
.diagnosis-heading p { margin: 0; color: var(--color-muted); }
.diagnosis-workspace { display: grid; grid-template-columns: minmax(0, .86fr) minmax(440px, 1.14fr); border: 1px solid var(--color-text); background: var(--color-surface); }
.diagnosis-form { padding: 34px; border-right: 1px solid var(--color-text); }
.form-section { margin: 0; padding: 0 0 30px; border: 0; }
.form-section + .form-section { padding-top: 28px; border-top: 1px solid var(--color-line); }
.form-section legend { margin-bottom: 20px; font-weight: 850; }
.form-section legend span { margin-right: 9px; color: var(--color-primary); font-family: Georgia, serif; }
.field-help { margin: -8px 0 15px; color: var(--color-muted); font-size: .68rem; line-height: 1.55; }
.conditional-fields[hidden], #replacement-months-field[hidden] { display: none; }
.conditional-fields { margin-top: 14px; }
.model-section { padding: 20px !important; border: 1px solid var(--color-line-dark) !important; background: #F3F6FF; }
.model-section legend { padding-top: 0; }
.model-notice { margin: -8px 0 18px; color: var(--color-muted); font-size: .7rem; line-height: 1.6; }
.model-notice strong { color: var(--color-primary-dark); }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 17px 14px; }
.field-grid > label, .choice-grid > label { display: grid; align-content: start; gap: 6px; color: var(--color-ink-soft); font-size: .76rem; font-weight: 800; }
.input-with-unit { display: flex; min-width: 0; align-items: center; border-bottom: 1px solid var(--color-line-dark); background: #FBFAF7; transition: border var(--transition), box-shadow var(--transition); }
.input-with-unit:focus-within { border-color: var(--color-primary); box-shadow: inset 0 -2px 0 var(--color-primary); }
.input-with-unit input { width: 100%; min-width: 0; padding: 10px 8px; border: 0; outline: 0; background: transparent; color: var(--color-text); font-size: 1rem; font-weight: 800; }
.input-with-unit span { padding-right: 9px; color: var(--color-muted); font-size: .68rem; white-space: nowrap; }
select { width: 100%; min-height: 45px; padding: 9px 30px 9px 9px; border: 0; border-bottom: 1px solid var(--color-line-dark); border-radius: 0; background: #FBFAF7; color: var(--color-text); font-size: .86rem; font-weight: 750; }
.choice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.check-choice { display: flex; gap: 12px; align-items: start; margin-top: 22px; padding: 14px; border-left: 4px solid var(--color-lime); background: #F7F8EB; cursor: pointer; }
.check-choice input { width: 18px; height: 18px; margin-top: 4px; accent-color: var(--color-primary); }
.check-choice strong, .check-choice small { display: block; }
.check-choice strong { font-size: .82rem; }
.check-choice small { color: var(--color-muted); font-size: .68rem; }
.calculate-button { width: 100%; margin-top: 2px; border: 0; }
.button-loader { display: none; width: 15px; height: 15px; border: 2px solid rgba(255,255,255,.45); border-top-color: white; border-radius: 50%; animation: spin .65s linear infinite; }
.calculate-button.is-loading .button-loader { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }
.diagnosis-form .privacy-note { margin: 10px 0 0; line-height: 1.5; }

.diagnosis-result { min-width: 0; padding: 34px; background: #FCFBF8; scroll-margin-top: 92px; }
.result-kicker { display: flex; gap: 18px; align-items: center; justify-content: space-between; }
.diagnosis-result > h2 { margin: 10px 0 24px; font-family: Georgia, "Yu Mincho", serif; font-size: 2rem; font-weight: 500; }
.comparison-strip { display: grid; grid-template-columns: 1fr 36px 1fr; align-items: center; border-top: 1px solid var(--color-text); border-bottom: 1px solid var(--color-text); }
.comparison-strip > div { padding: 19px 6px; }
.comparison-strip span, .comparison-strip strong { display: block; }
.comparison-strip span { color: var(--color-muted); font-size: .68rem; font-weight: 750; }
.comparison-strip strong { margin-top: 3px; font-family: Georgia, serif; font-size: clamp(1.4rem, 3vw, 2.2rem); }
.comparison-strip i { width: 26px; height: 1px; background: var(--color-primary); }
.savings-number { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; padding: 18px 20px; background: var(--color-lime); }
.savings-number span { font-size: .78rem; font-weight: 850; }
.savings-number strong { margin-left: auto; font-family: Georgia, serif; font-size: 2rem; }
.savings-number small { color: #4E551C; font-size: .63rem; }
.savings-number.is-negative { background: #F7D8D1; }
.savings-number.is-negative small { color: #7A382C; }
.cost-breakdown { margin-top: 26px; border-left: 5px solid var(--color-primary); background: white; }
.cost-breakdown h3 { margin: 0; padding: 15px 18px 8px; font-size: .9rem; }
.cost-breakdown dl { margin: 0; padding: 0 18px 12px; }
.cost-breakdown dl div { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px solid var(--color-line); font-size: .75rem; }
.cost-breakdown dd { margin: 0; font-weight: 800; }
.breakdown-total { display: flex; align-items: baseline; justify-content: space-between; padding: 12px 18px; background: var(--color-pale-blue); }
.breakdown-total span { font-size: .72rem; font-weight: 800; }
.breakdown-total strong { font-family: Georgia, serif; font-size: 1.3rem; }
.recommendation-stack { margin-top: 30px; border-top: 1px solid var(--color-line-dark); }
.recommendation { display: grid; grid-template-columns: minmax(150px, .72fr) auto minmax(220px, 1fr); gap: 20px; align-items: center; padding: 18px 4px; border-bottom: 1px solid var(--color-line); }
.recommendation header span { color: var(--color-primary); font-size: .58rem; font-weight: 900; letter-spacing: .1em; }
.recommendation h3 { margin: 2px 0 0; font-size: .92rem; }
.recommendation > strong { font-family: Georgia, serif; font-size: 1.25rem; white-space: nowrap; }
.recommendation > p { margin: 0; color: var(--color-muted); font-size: .7rem; line-height: 1.6; }
.recommendation-balance { background: var(--color-pale-blue); margin-inline: -10px; padding-inline: 14px; }
.editorial-note, .warning-note { margin-top: 24px; padding: 18px 20px; border-left: 4px solid var(--color-primary); background: var(--color-pale-blue); }
.editorial-note strong, .warning-note strong { display: block; font-size: .82rem; }
.editorial-note p, .warning-note p { margin: 5px 0 0; color: var(--color-ink-soft); font-size: .72rem; }
.warning-note { border-left-color: var(--color-danger); background: #FFF0EC; }
.offer-recommendations { margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--color-text); }
.offer-heading h3 { margin: 4px 0 12px; font-family: Georgia, "Yu Mincho", serif; font-size: 1.35rem; font-weight: 500; }
.offer-recommendations > .muted { font-size: .72rem; }
.affiliate-cta { margin-top: 16px; padding: 18px; border: 1px solid var(--color-line-dark); background: white; }
.affiliate-cta-head { display: flex; gap: 11px; align-items: start; margin-bottom: 14px; }
.affiliate-cta-head strong { display: block; font-size: .9rem; }
.affiliate-cta-head p { margin: 2px 0 0; color: var(--color-muted); font-size: .68rem; }
.affiliate-cta > small { display: block; margin-top: 9px; color: var(--color-muted); font-size: .6rem; }
.rate-evidence { margin-top: 13px; padding-top: 12px; border-top: 1px solid var(--color-line); color: var(--color-muted); font-size: .67rem; }
.rate-evidence summary { cursor: pointer; color: var(--color-primary-dark); font-weight: 800; }
.rate-evidence ul { padding-left: 18px; }
.rate-evidence li { margin: 8px 0; line-height: 1.55; }
.rate-evidence p { margin: 8px 0 0; line-height: 1.55; }
.a8-material { max-width: 100%; overflow-wrap: anywhere; }
.a8-material > a { display: flex; min-height: 46px; align-items: center; justify-content: center; padding: 10px 14px; border: 1px solid var(--color-primary); background: var(--color-primary); color: white; font-size: .78rem; font-weight: 850; line-height: 1.4; text-align: center; text-decoration: none; }
.a8-material > a:hover { background: var(--color-primary-dark); color: white; }
.a8-material img { max-width: 100%; height: auto; }

.home-section { padding-block: var(--space-7); border-top: 1px solid var(--color-line-dark); }
.section-heading { max-width: 820px; margin-bottom: 30px; }
.section-heading-inline { display: grid; max-width: none; grid-template-columns: 1fr .7fr; gap: 50px; align-items: end; }
.section-heading h2, .methodology h2 { margin: 8px 0 10px; font-family: Georgia, "Yu Mincho", serif; font-size: clamp(2.3rem, 4vw, 4rem); font-weight: 500; line-height: 1.1; letter-spacing: -.04em; }
.section-heading p { margin: 0; color: var(--color-muted); }
.featured-guide { display: grid; grid-template-columns: 1fr 190px; gap: 40px; padding: 30px 0; border-top: 4px solid var(--color-text); border-bottom: 1px solid var(--color-text); }
.featured-guide h3 { max-width: 760px; margin: 18px 0 12px; font-family: Georgia, "Yu Mincho", serif; font-size: clamp(1.5rem, 3vw, 2.7rem); font-weight: 500; line-height: 1.25; }
.featured-guide h3 a { color: var(--color-text); text-decoration: none; }
.featured-guide p { max-width: 680px; color: var(--color-muted); }
.guide-index { display: grid; align-content: space-between; min-height: 210px; padding: 16px; border-left: 1px solid var(--color-line-dark); }
.guide-index span, .guide-index small { color: var(--color-muted); font-size: .6rem; letter-spacing: .12em; }
.guide-index strong { color: var(--color-primary); font-family: Georgia, serif; font-size: 5rem; font-weight: 500; line-height: 1; }
.methodology { display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; }
.methodology > div > p { max-width: 520px; color: var(--color-muted); }
.method-list p { display: grid; grid-template-columns: 42px 150px 1fr; gap: 18px; margin: 0; padding: 18px 0; border-bottom: 1px solid var(--color-line-dark); }
.method-list p > span { color: var(--color-primary); font-family: Georgia, serif; }
.method-list small { color: var(--color-muted); }

.tool-header, .policy-header { max-width: 900px; padding: var(--space-7) 0 var(--space-6); }
.tool-header h1, .policy-header h1, .article-header h1 { margin: 16px 0 20px; font-family: Georgia, "Yu Mincho", serif; font-size: clamp(3rem, 6vw, 5.8rem); font-weight: 500; line-height: 1.03; letter-spacing: -.05em; }
.tool-header p, .policy-header p { max-width: 720px; color: var(--color-muted); font-size: 1.03rem; }
.calculator-page > .diagnosis-section { width: 100%; padding-top: 0; border-top: 0; }

.article-page { display: grid; grid-template-columns: minmax(0, var(--reading-width)) 280px; gap: clamp(55px, 8vw, 110px); align-items: start; padding-block: 38px var(--space-7); }
.article-main { min-width: 0; }
.article-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--color-muted); font-size: .72rem; }
.article-breadcrumb a { color: var(--color-muted); }
.disclosure { display: flex; gap: 10px; align-items: start; margin-bottom: 30px; padding: 11px 0; border-top: 1px solid var(--color-line); border-bottom: 1px solid var(--color-line); color: var(--color-muted); font-size: .68rem; line-height: 1.5; }
.article-header { padding-bottom: 28px; border-bottom: 1px solid var(--color-text); }
.article-header h1 { max-width: 760px; font-size: clamp(2.7rem, 5vw, 4.8rem); }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--color-muted); font-size: .7rem; }
.diagnosis-bridge { margin-block: 26px 42px; }
.diagnosis-bridge > strong { margin-top: 5px; font-family: Georgia, "Yu Mincho", serif; font-size: 1.3rem; font-weight: 500; }
.article-dek { margin: 34px 0 22px; color: var(--color-ink-soft); font-size: 1.05rem; line-height: 1.9; }
.conclusion-card { margin: 24px 0 44px; }
.callout-label { color: var(--color-primary-dark); font-size: .68rem; font-weight: 900; letter-spacing: .1em; }
.article-section { margin-block: 50px; scroll-margin-top: 100px; }
.article-section > h2 { margin: 0 0 20px; padding-top: 8px; border-top: 1px solid var(--color-line-dark); font-family: Georgia, "Yu Mincho", serif; font-size: clamp(1.7rem, 3vw, 2.5rem); font-weight: 500; line-height: 1.35; letter-spacing: -.025em; }
.article-section h3 { margin: 0 0 8px; font-size: 1rem; }
.article-section p { color: var(--color-ink-soft); }
.article-section strong { color: var(--color-text); }
.check-list, .cost-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.check-list li, .cost-list li { position: relative; padding-left: 24px; }
.check-list li::before, .cost-list li::before { position: absolute; top: .72em; left: 2px; width: 7px; height: 7px; background: var(--color-lime); content: ""; }
.section-cost .cost-list { margin: 20px 0; padding: 22px; border-left: 5px solid var(--color-primary); background: white; }
.editorial-grid { display: grid; gap: 12px; }
.criteria-grid, .case-grid, .decision-grid { grid-template-columns: 1fr 1fr; }
.article-card, .decision-card { padding: 20px; border-top: 3px solid var(--color-text); background: var(--color-surface); }
.article-card:nth-child(even) { border-top-color: var(--color-primary); }
.card-index { color: var(--color-primary); font-family: Georgia, serif; font-size: .8rem; }
.criterion-card h3 { margin-top: 16px; }
.case-grid { margin-top: 20px; }
.case-card:nth-child(2), .decision-yes { background: var(--color-pale-blue); }
.decision-wait { border-top-color: var(--color-line-dark); }
.table-wrap { margin-top: 20px; overflow-x: auto; border-top: 3px solid var(--color-text); background: white; }
table { width: 100%; border-collapse: collapse; font-size: .78rem; }
caption { padding: 14px 14px 8px; font-weight: 850; text-align: left; }
th, td { padding: 12px 14px; border-top: 1px solid var(--color-line); text-align: left; vertical-align: top; }
thead th { color: var(--color-muted); font-size: .66rem; }
.table-note { margin: 0 !important; padding: 10px 14px; color: var(--color-muted) !important; font-size: .65rem; }
.section-checklist .check-list { padding: 22px; background: var(--color-text); color: white; }
.section-summary { padding: 24px; border-left: 5px solid var(--color-lime); background: white; }
.section-sources { padding-top: 30px; border-top: 1px solid var(--color-text); }
.section-sources > h2 { border: 0; font-size: 1.2rem; }
.source-list { display: grid; gap: 8px; padding-left: 18px; font-size: .75rem; }
.source-list a { overflow-wrap: anywhere; }
.partner-card { margin: 28px 0; }
.partner-heading { display: flex; gap: 11px; align-items: start; margin-bottom: 14px; }
.partner-heading strong, .partner-heading span { display: block; }
.partner-heading div > span { color: var(--color-muted); font-size: .68rem; }
.article-rail { position: sticky; top: 100px; padding-top: 140px; }
.rail-card { padding: 20px; border-top: 4px solid var(--color-primary); background: white; }
.rail-card > strong { display: block; margin-top: 8px; font-family: Georgia, serif; font-size: 1.1rem; }
.rail-card p { color: var(--color-muted); font-size: .74rem; }
.rail-card small { display: block; margin-top: 8px; color: var(--color-muted); font-size: .6rem; text-align: center; }

.policy-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; padding-bottom: var(--space-7); }
.policy-card { padding: 28px; border-top: 4px solid var(--color-text); background: white; }
.policy-card-wide { grid-column: 1 / -1; }
.policy-card h2 { margin: 20px 0 9px; font-family: Georgia, serif; font-weight: 500; }
.policy-card p { margin: 0; color: var(--color-muted); }
.policy-stack { display: grid; gap: 14px; max-width: 860px; padding-bottom: var(--space-7); }
.not-found { padding-block: 14vh; }
.not-found h1 { font-family: Georgia, serif; font-size: clamp(2.5rem, 5vw, 5rem); font-weight: 500; }

.site-footer { padding: 52px max(22px, calc((100% - var(--content-width)) / 2)); border-top: 1px solid var(--color-text); background: #E8E4DB; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 60px; }
.footer-brand { color: var(--color-text); font-weight: 850; text-decoration: none; }
.footer-grid p { max-width: 600px; color: var(--color-muted); font-size: .78rem; }
.footer-grid nav { display: grid; gap: 7px; align-content: start; }
.footer-grid nav a { color: var(--color-muted); font-size: .75rem; font-weight: 750; text-decoration: none; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 34px; padding-top: 16px; border-top: 1px solid var(--color-line-dark); color: var(--color-muted); font-size: .63rem; }

@media (max-width: 980px) {
  .home-hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-ledger { max-width: 700px; }
  .diagnosis-heading { grid-template-columns: 1fr; gap: 15px; }
  .diagnosis-workspace { grid-template-columns: 1fr; }
  .diagnosis-form { border-right: 0; border-bottom: 1px solid var(--color-text); }
  .article-page { grid-template-columns: 1fr; }
  .article-rail { position: static; padding-top: 0; }
  .rail-card { display: grid; grid-template-columns: 1fr auto; gap: 8px 20px; align-items: center; }
  .rail-card .button { grid-column: 2; grid-row: 1 / 4; }
  .methodology { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 640px) {
  :root { --space-7: 3.5rem; }
  body { font-size: 15px; }
  .site-header-inner, .page-shell, .home-hero, .home-section, .diagnosis-section { width: min(calc(100% - 28px), var(--content-width)); }
  .site-header-inner { min-height: 66px; }
  .brand-mark { width: 36px; height: 36px; }
  .brand strong { font-size: .72rem; }
  .brand small, .global-nav > a:not(.nav-cta) { display: none; }
  .global-nav .nav-cta { padding: 8px 10px; font-size: .68rem; }
  .home-hero { gap: 40px; padding-block: 52px 60px; }
  .hero-copy h1 { margin-top: 18px; font-size: clamp(3.2rem, 17vw, 4.7rem); }
  .hero-copy > p { font-size: .94rem; }
  .hero-actions { display: grid; gap: 14px; }
  .hero-actions .button { width: 100%; }
  .ledger-formula { padding: 16px; }
  .ledger-formula b { padding-inline: 6px; }
  .ledger-total { display: grid; gap: 4px; }
  .diagnosis-section { padding-block: 58px; }
  .diagnosis-heading h2 { font-size: 2.8rem; }
  .diagnosis-workspace { margin-inline: -2px; }
  .diagnosis-form, .diagnosis-result { padding: 23px 17px; }
  .field-grid, .choice-grid { grid-template-columns: 1fr; }
  .field-grid { gap: 15px; }
  .choice-grid { gap: 13px; }
  .result-kicker { display: block; }
  .result-kicker .condition-tags { margin-top: 10px; }
  .comparison-strip { grid-template-columns: 1fr 20px 1fr; }
  .comparison-strip > div { padding-block: 15px; }
  .comparison-strip strong { font-size: 1.22rem; }
  .savings-number { display: grid; grid-template-columns: 1fr auto; gap: 0 10px; padding: 15px; }
  .savings-number strong { font-size: 1.55rem; }
  .savings-number small { grid-column: 1 / -1; }
  .recommendation { grid-template-columns: 1fr auto; gap: 7px 12px; }
  .recommendation > p { grid-column: 1 / -1; }
  .recommendation-balance { margin-inline: -6px; padding-inline: 10px; }
  .section-heading-inline { grid-template-columns: 1fr; gap: 14px; }
  .featured-guide { grid-template-columns: 1fr; gap: 24px; }
  .guide-index { min-height: 120px; border-top: 1px solid var(--color-line-dark); border-left: 0; }
  .guide-index strong { font-size: 3.5rem; }
  .method-list p { grid-template-columns: 32px 1fr; gap: 4px 12px; }
  .method-list small { grid-column: 2; }
  .tool-header, .policy-header { padding: 50px 0 34px; }
  .tool-header h1, .policy-header h1, .article-header h1 { font-size: clamp(2.7rem, 13vw, 4rem); }
  .article-page { padding-top: 24px; }
  .criteria-grid, .case-grid, .decision-grid, .policy-grid { grid-template-columns: 1fr; }
  .article-section { margin-block: 42px; }
  .article-section > h2 { font-size: 1.65rem; }
  .article-card, .decision-card { padding: 18px; }
  th, td { min-width: 120px; padding: 11px; }
  .rail-card { display: block; }
  .rail-card .button { margin-top: 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { display: grid; }
  .brand strong, .global-nav .nav-cta, .eyebrow, .issue-label, .privacy-note,
  .recommendation > p, .editorial-note p, .warning-note p, .affiliate-cta-head p,
  .affiliate-cta > small, .recommendation header span, .pill, .guide-index span,
  .guide-index small, .ledger-formula small, .check-choice small,
  .comparison-strip span, .savings-number small, .breakdown-total span,
  .footer-grid p, .footer-grid nav a, .footer-bottom { font-size: .75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}