/* V2: Montserrat + verified Raytron BrandBook web colors.
   #254B60 / #262D37 / #EEF0F2 / #7290A7: BrandBook pages 17–19.
   Original General Clad logo unchanged. Existing copper only accents material. */
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/* Keep narrow-screen specification tables inside their own scroll region. */
.specs-section>div{min-width:0}.table-wrap{max-width:100%;min-width:0}

/* V3: readable compact navigation, resilient grids and focused grade handoff. */
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.mobile-nav{max-height:calc(100dvh - var(--header-clearance));overflow-y:auto;overscroll-behavior:contain}
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 .header-actions .button{font-size:.875rem;max-width:none;padding:.75rem 1rem}
 .header .brand{flex-basis:90px}.header .brand img{width:90px}
 .topbar .wrap{flex-wrap:wrap;gap:.25rem 1rem;padding-block:.5rem}
 .topbar span{font-size:.75rem;max-width:none;letter-spacing:.04em}
 .topbar a{font-size:.75rem;min-height:24px;display:inline-flex;align-items:center}
 .hero .eyebrow,.hero-caption span,.photo-label,.grade-chips button[aria-pressed=true]:after{font-size:.75rem}
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}
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@media print{
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}

/* V5: grade lookup and technical-document request pages. */
.catalog-head,.grade-head{background:var(--surface);padding-block:2rem 3.5rem}
.catalog-heading,.grade-head-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:4rem;align-items:center}
.catalog-heading h1,.grade-head h1{font-size:clamp(2.4rem,4.7vw,4rem);line-height:1.14;margin:1rem 0 1.5rem}
.catalog-heading>div>p,.grade-lead{font-size:1.0625rem;max-width:640px}
.catalog-key{border-left:1px solid var(--navy);padding-left:3rem}
.catalog-key>strong{font-size:clamp(3rem,5.5vw,4.75rem);letter-spacing:-.05em;font-weight:500;line-height:1.15}
.catalog-key>strong>span{display:block;font-size:1.125rem;letter-spacing:0;margin:.5rem 0 1.25rem}
.catalog-key p{font-size:1rem}
.catalog-comparison{padding-block:4rem}.catalog-comparison .section-heading{align-items:start}
.catalog-comparison table{width:100%;min-width:650px}.catalog-comparison th:first-child{padding-left:1rem}
.catalog-comparison thead th{font-size:.875rem;background:var(--surface);text-align:left}
.grade-table-link{display:inline-flex;align-items:center;min-height:44px;text-decoration:underline;text-underline-offset:4px}
.catalog-boundary,.grade-boundary{font-size:.9375rem;line-height:1.8;margin-top:1.25rem;max-width:860px}
.catalog-support{background:var(--surface);padding-block:4rem}
.catalog-support-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:5rem}
.catalog-support h2{font-size:clamp(2rem,3vw,2.75rem);margin:1rem 0 1.5rem}
.catalog-support p{margin-block:1rem}.catalog-next h3{font-size:1.25rem;margin-bottom:1.25rem}
.catalog-next>a{display:block;padding:1rem 0;border-bottom:1px solid var(--navy);font-size:1rem;text-decoration:none}
.catalog-next>a:hover{text-decoration:underline;text-underline-offset:4px}
.grade-snapshot{padding:2rem 2.5rem;border:1px solid var(--navy);background:white}
.grade-snapshot>strong{font-size:5rem;line-height:1.1;font-weight:500;letter-spacing:-.05em;display:block;margin:1rem 0 2rem}
.grade-snapshot>strong>span{font-size:1.125rem;letter-spacing:0;margin-left:.75rem;white-space:nowrap}
.grade-snapshot dl{margin:0}.grade-snapshot dl>div{padding:.875rem 0;border-top:1px solid var(--line)}
.grade-snapshot dt{font-size:.875rem}.grade-snapshot dd{font-size:1rem;font-weight:600;margin:.25rem 0 0}
.grade-head .button-row{margin-top:2rem}.grade-head .grade-boundary{max-width:620px}
.grade-record{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:4rem;padding-block:4rem}
.grade-record>div>p{margin-top:1.5rem}.grade-record h2{font-size:2.5rem;margin-top:1rem}
.grade-checks{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:2rem;margin:2rem 0}
.grade-checks>div{border-top:1px solid var(--navy);padding-top:1rem}.grade-checks span{font-size:.875rem}
.grade-checks h3{font-size:1.125rem;margin:1rem 0 .75rem}.grade-checks p{font-size:1rem}
.grade-documents{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:4rem;align-items:center;padding-block:4rem}
.grade-documents h2{font-size:2.5rem;margin:1rem 0 1.5rem}.document-actions{display:flex;align-items:flex-start;flex-direction:column;gap:1rem}
.grade-family{padding-block:2.5rem 4rem;border-top:1px solid var(--line)}.grade-family h2{font-size:1.5rem;margin-bottom:1.5rem}
.grade-siblings{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:.75rem;margin-bottom:1.5rem}
.grade-siblings a{display:block;border:1px solid var(--navy);text-align:center;padding:.75rem .5rem;font-size:1.5rem;font-weight:500}
.grade-siblings a>span{display:block;font-size:.875rem;font-weight:400}
.grade-siblings a[aria-current]{background:var(--navy);color:white}
.grade-siblings a[aria-current]:after{content:'Current';display:block;font-size:.75rem;margin-top:.25rem}
.grade-siblings a[aria-current]:focus-visible{outline-color:var(--navy)}
.catalog-entry{display:flex;align-items:center;justify-content:space-between;gap:2rem;border-block:1px solid var(--line);padding-block:2rem;margin-block:3rem}
.catalog-entry h2{font-size:1.5rem;margin-bottom:.75rem}.catalog-entry p{font-size:1rem}.catalog-entry .button{flex-shrink:0}
.catalog-entry-link{margin-bottom:1rem}.document-entry{background:var(--surface);padding:2rem;margin-bottom:3rem}
.document-entry h2{font-size:1.75rem;margin:1rem 0}.document-entry p{margin-bottom:1.5rem}
.resource-nav .document-entry-link{font-weight:600;border-bottom:1px solid var(--line);margin-bottom:1rem;padding-bottom:1rem}
.documentation-intro{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:4rem;padding-block:3rem}
.documentation-intro h2{font-size:2.25rem;margin-top:1rem}
.document-catalog{padding-bottom:4rem}.document-card{display:grid;grid-template-columns:minmax(0,.65fr) minmax(0,1.6fr) minmax(0,1fr);gap:2rem;border-top:1px solid var(--navy);padding-block:2.5rem;align-items:start}
.document-index{font-size:.8125rem;font-weight:600;letter-spacing:.04em;line-height:1.8}
.document-card h2{font-size:1.75rem;margin-bottom:1rem}.document-card p{font-size:1rem}
.document-card .document-note{font-size:.9375rem;margin-top:1rem}.document-card .button{width:100%;white-space:normal;text-align:center}
.catalog-heading>*,.grade-head-grid>*,.grade-record>*,.grade-documents>*,.document-card>*,.documentation-intro>*{min-width:0}
@media(max-width:1000px){.grade-snapshot{padding:1.5rem}.grade-head-grid,.catalog-heading{gap:2rem}.grade-checks{grid-template-columns:repeat(2,minmax(0,1fr))}.grade-record,.catalog-support-grid,.grade-documents{gap:2.5rem}.document-card{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}.document-index{grid-column:1/-1}.grade-siblings{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:760px){.catalog-heading,.grade-head-grid,.grade-record,.grade-documents,.catalog-support-grid,.documentation-intro{grid-template-columns:1fr;gap:2rem}.catalog-key{border-left:0;border-top:1px solid var(--navy);padding:1.5rem 0 0}.catalog-key>strong{font-size:3rem}.catalog-key>strong>span{display:inline;font-size:1rem;margin-left:.75rem}.catalog-key p{margin-top:1rem}.grade-snapshot>strong{font-size:4rem;margin-block:.75rem 1.5rem}.grade-snapshot dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.grade-snapshot dd{font-size:.9375rem}.catalog-entry{align-items:flex-start;flex-direction:column}.document-card{grid-template-columns:1fr;gap:1rem}.document-card .button{width:auto}.grade-record h2,.grade-documents h2,.documentation-intro h2{font-size:2rem}}
@media(max-width:480px){.catalog-head,.grade-head{padding-block:1.5rem 2.5rem}.catalog-heading h1,.grade-head h1{font-size:2.375rem}.grade-head .button-row{align-items:stretch}.grade-head .button{width:100%;padding-inline:1rem}.grade-snapshot dl{grid-template-columns:1fr;gap:0}.grade-checks{grid-template-columns:1fr;gap:1.5rem}.grade-siblings{gap:.5rem}.grade-siblings a{font-size:1.25rem}.grade-siblings a>span{font-size:.75rem}.document-actions .button{width:100%;white-space:normal;text-align:center}.document-entry{padding:1.5rem}.document-card .button{width:100%}.catalog-comparison,.grade-record,.grade-documents,.catalog-support{padding-block:3rem}}
@media print{.grade-family,.document-actions,.catalog-entry-link{display:none!important}.grade-head,.catalog-head,.catalog-support{background:white;padding-block:1rem}.grade-head-grid,.grade-record,.grade-documents,.catalog-support-grid{display:block}.grade-snapshot{margin-top:1rem}.grade-checks{grid-template-columns:repeat(2,1fr)}}

/* Ordinary navigation text keeps a tested dark color on hover. */
.resource-list a:hover h3,.breadcrumbs a:hover,.application-jump a:hover,.resource-nav a:hover{color:var(--navy)}
.language-nav{display:flex;justify-content:flex-end;gap:.75rem;max-width:1360px;margin:auto;padding-inline:2rem;border-top:1px solid var(--line)}
.language-nav a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;font-size:.875rem;padding:.5rem;color:var(--navy);text-decoration:underline;text-underline-offset:4px}
.language-nav a[aria-current]{font-weight:700;text-decoration:none}
.locale-prose{max-width:960px}.locale-prose section{margin-bottom:2.5rem}.locale-prose h2{font-size:1.75rem;margin-bottom:1.25rem}.locale-prose p{margin-bottom:1rem;line-height:1.85}.locale-prose ul{padding-left:1.5rem;line-height:1.85}.locale-prose li{margin-bottom:.5rem}
.locale-actions{display:flex;gap:1rem;flex-wrap:wrap}.locale-link-note{font-size:.9375rem;margin-block:1rem 2rem}
.legacy-directory{border-top:1px solid var(--line);padding-block:2rem}.legacy-directory h2{font-size:1.5rem;margin-bottom:1rem}.legacy-directory>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.legacy-directory a{font-size:1rem;text-decoration:underline;min-height:44px;padding:.75rem}
html[lang="ja"] body{font-family:"Montserrat","Yu Gothic","Hiragino Kaku Gothic ProN",sans-serif}html[lang="ja"] h1,html[lang="ja"] h2{line-height:1.4}
@media(max-width:760px){.language-nav{padding-inline:1rem;gap:.5rem}.legacy-directory>div{grid-template-columns:1fr 1fr}.locale-prose h2{font-size:1.5rem}.locale-actions .button{width:100%;white-space:normal;text-align:center}}
@media(max-width:480px){.legacy-directory>div{grid-template-columns:1fr}.language-nav{justify-content:center}}
@media print{.language-nav,.locale-actions{display:none!important}}

:root{--header-clearance:11rem}
html{scroll-padding-top:var(--header-clearance)}
main [id]{scroll-margin-top:1rem}
.resource-nav{top:calc(var(--header-clearance) + 1rem)}
@media(max-width:760px){:root{--header-clearance:10rem}}

/* V6: application review paths and readable technical articles. */
.application-guide-head,.technical-guide-head{padding-block:2rem 3.5rem;background:var(--surface)}
.application-guide-intro{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:4rem;align-items:start}
.application-guide-intro h1,.technical-guide-head h1{font-size:clamp(2.3rem,4.2vw,3.5rem);line-height:1.18;margin:1rem 0 1.5rem;max-width:960px}
.application-guide-intro>div>p{font-size:1.0625rem;max-width:680px;margin-bottom:2rem}
.application-questions{background:white;border-top:2px solid var(--navy);padding:2rem}
.application-questions h2{font-size:1.25rem;margin-bottom:1.25rem}
.application-questions ul{padding-left:1.25rem}.application-questions li{font-size:1rem;line-height:1.8;margin:.75rem 0}
.application-requirements{padding-block:4rem}.application-requirements table{min-width:690px;width:100%}
.application-requirements thead th{background:var(--surface);font-size:.875rem;text-align:left;padding-left:1rem}
.qualification-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2rem;list-style:none;padding:0;margin:2.5rem 0 1.5rem}
.qualification-flow li{border-top:1px solid var(--navy);padding-top:1rem}.qualification-flow span{font-size:.875rem;font-weight:600}
.qualification-flow h3{font-size:1.25rem;margin:1rem 0}.qualification-flow p{font-size:1rem}
.qualification-note{font-size:.9375rem!important;max-width:850px}
.application-evidence{padding-block:4rem}.application-evidence>div{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:4rem;align-items:center}
.application-evidence h2{font-size:2.5rem;margin:1rem 0 1.5rem}
.reading-directory{margin-block:0 3.5rem}.reading-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.5rem}
.reading-card{display:flex;flex-direction:column;gap:1rem;border:1px solid var(--line);padding:1.75rem;background:white;min-width:0}
.reading-card>span{font-size:.8125rem;letter-spacing:.04em;font-weight:600}.reading-card h3{font-size:1.3rem}
.reading-card p{font-size:1rem}.reading-card strong{font-size:.875rem;margin-top:auto;text-decoration:underline;text-underline-offset:4px;padding-top:.5rem}
.reading-card:hover{border-color:var(--navy)}.reading-card:focus-visible{outline-offset:4px}
.guide-date{font-size:.875rem;color:var(--navy);margin:1rem 0 2rem}
.guide-answer{max-width:900px;border-left:3px solid var(--navy);padding:1.5rem 2rem;background:white}
.guide-answer p{font-size:1.0625rem;line-height:1.85;margin:0}
.guide-layout{display:grid;grid-template-columns:minmax(180px,.65fr) minmax(0,2fr);gap:4rem;padding-block:4rem}
.guide-index{position:sticky;top:calc(var(--header-clearance) + 1rem);align-self:start;border-top:1px solid var(--navy);padding-top:1rem}
.guide-index a{display:block;min-height:44px;padding:.75rem 0;font-size:.9375rem;line-height:1.7;text-decoration:none;border-bottom:1px solid var(--line)}
.guide-index a:hover{text-decoration:underline;text-underline-offset:4px}
.technical-guide-body{min-width:0;max-width:900px}.technical-guide-body>section{margin-bottom:3rem;padding-bottom:3rem;border-bottom:1px solid var(--line)}
.technical-guide-body h2{font-size:2rem;line-height:1.3;margin-bottom:1.5rem}.technical-guide-body p{font-size:1rem;margin-block:1rem;line-height:1.85}
.technical-guide-body ul{padding-left:1.4rem}.technical-guide-body li{font-size:1rem;line-height:1.85;margin:.75rem 0}
.technical-guide-body table{min-width:630px;width:100%}.technical-guide-body thead th{font-size:.875rem;text-align:left;background:var(--surface);padding-left:1rem}
.guide-related{border-top:1px solid var(--navy);margin-top:3rem;padding-top:1.5rem}
.guide-related h2{font-size:1.5rem;margin:0 0 1rem}.guide-related a{display:block;font-size:1rem;min-height:44px;padding:.875rem 0;border-bottom:1px solid var(--line);text-decoration:underline;text-underline-offset:4px}
.guide-next-step{background:var(--surface);padding:2rem}.guide-next-step .button-row{margin-block:1.5rem}
.guide-next-step .text-link{display:block;width:fit-content;margin-top:.5rem}
.technical-guide-body .guide-scope{font-size:.9375rem;line-height:1.8;margin-top:2rem}
.contextual-reading{padding-block:2rem;border-top:1px solid var(--line)}.contextual-reading h2{font-size:1.5rem;margin-bottom:1rem}
.contextual-reading a{display:block;font-size:1rem;min-height:44px;padding:.75rem 0;text-decoration:underline;text-underline-offset:4px}
.application-guide-intro>*,.application-evidence>div>*,.guide-layout>*{min-width:0}
@media(max-width:1000px){.application-guide-intro,.application-evidence>div{gap:2rem}.guide-layout{gap:2rem;grid-template-columns:190px minmax(0,1fr)}}
@media(max-width:800px){.application-guide-intro,.application-evidence>div{grid-template-columns:1fr}.guide-layout{display:block}.guide-index{position:static;margin-bottom:2.5rem}.guide-index a{padding-block:.625rem}.qualification-flow{grid-template-columns:1fr;gap:1.5rem}.application-evidence h2{font-size:2rem}}
@media(max-width:480px){.application-guide-head,.technical-guide-head{padding-block:1.5rem 2.5rem}.application-guide-intro h1,.technical-guide-head h1{font-size:2.25rem}.application-guide-intro .button{width:100%;text-align:center;white-space:normal}.application-questions,.guide-answer,.guide-next-step{padding:1.5rem}.reading-grid{grid-template-columns:1fr}.reading-card{padding:1.5rem}.guide-layout,.application-requirements,.application-evidence{padding-block:3rem}.technical-guide-body h2{font-size:1.75rem}.technical-guide-body>section{margin-bottom:2.5rem;padding-bottom:2.5rem}.guide-next-step .button{width:100%;white-space:normal;text-align:center}}
@media print{.guide-index,.reading-directory,.guide-next-step,.guide-related,.contextual-reading{display:none!important}.guide-layout,.application-guide-intro,.application-evidence>div{display:block}.technical-guide-head,.application-guide-head{background:white;padding-block:1rem}.guide-answer{padding:1rem}.qualification-flow{display:block}.technical-guide-body table,.application-requirements table{min-width:0;break-inside:avoid}}