.content-breadcrumb{padding-top:28px;padding-bottom:18px;font-size:13px;color:var(--muted)}
.content-breadcrumb ol{display:flex;flex-wrap:wrap;gap:6px 10px;list-style:none;margin:0;padding:0}.content-breadcrumb li+li:before{content:"/";margin-right:10px;color:#8a9eaa}.content-breadcrumb li[aria-current]{max-width:100%}
.specification-hero{display:grid;grid-template-columns:1.13fr 1fr;gap:64px;align-items:center;padding-top:24px;padding-bottom:64px}.specification-hero h1{font-size:clamp(36px,4vw,58px);line-height:1.08;max-width:16ch;margin:0 0 25px;letter-spacing:-.035em}.specification-hero .lead{font-size:19px;line-height:1.65;max-width:52ch}.specification-hero .caption{max-width:55ch;margin-top:24px}.specification-hero figure{margin:0;background:#f2f6f7;position:relative}.specification-hero img{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:cover}.specification-hero figcaption{position:absolute;bottom:15px;right:18px;font-size:12px;color:#526774}
.guide-hero{background:#edf3f5;border-block:1px solid #d6e1e5;padding:46px 0 42px}.guide-hero h1{font-size:clamp(32px,4vw,52px);line-height:1.12;letter-spacing:-.03em;max-width:28ch;margin:12px 0 25px}.guide-hero .lead{font-size:20px;line-height:1.65;max-width:75ch;margin-bottom:23px}.guide-context{font-size:14px;color:#14566b;margin:0}.guide-meta{font-size:13px;color:#526774;margin:0;display:flex;gap:12px 26px;flex-wrap:wrap}
.knowledge-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:66px;padding-top:54px;padding-bottom:40px;align-items:start}.page-toc{position:sticky;top:112px;border-top:3px solid #14566b;padding-top:18px}.page-toc h2{font-size:16px;line-height:1.4;margin:0 0 16px}.page-toc ol{list-style:none;padding:0;margin:0 0 25px;display:grid;gap:13px}.page-toc a{font-size:14px;line-height:1.5;text-decoration:none;display:block}.page-toc li a{color:#526774}.page-toc a:hover{text-decoration:underline;color:#14566b}
.knowledge-body{min-width:0;max-width:780px;font-size:17px;line-height:1.75;color:#324b59}.knowledge-body>section{margin-bottom:43px}.knowledge-body>section:first-child>h2{margin-top:0}.knowledge-body h2{font-size:29px;line-height:1.2;letter-spacing:-.02em;color:#203540;margin:0 0 22px;scroll-margin-top:125px;max-width:31ch}.knowledge-body h3{font-size:20px;line-height:1.35;color:#203540;margin:0 0 14px}.knowledge-body p{margin:0 0 20px}.knowledge-body ul,.knowledge-body ol{padding-left:24px;margin:0 0 22px}.knowledge-body li{padding-left:4px;margin-bottom:10px}.knowledge-body a{text-underline-offset:3px}.knowledge-body .source-cite{font-size:11px;line-height:0;white-space:nowrap;margin-left:3px}.knowledge-body .source-cite a{text-decoration:none}.knowledge-body .table-scroll{margin:24px 0;max-width:100%;border:1px solid #d6e1e5;overflow-x:auto}.knowledge-body table{width:100%;min-width:530px;border-collapse:collapse;font-size:15px;line-height:1.55;margin:0}.knowledge-body caption{text-align:left;padding:15px 17px;background:#edf3f5;font-size:14px;font-weight:600;color:#203540}.knowledge-body th,.knowledge-body td{padding:14px 16px;vertical-align:top;border-bottom:1px solid #d6e1e5;text-align:left}.knowledge-body thead{background:#f4f8f9}.knowledge-body thead th{color:#203540;font-size:14px}.knowledge-body tbody th{font-weight:600;color:#203540;min-width:120px}.knowledge-body tbody tr:last-child>*{border-bottom:0}
.guide-tool-shortcut{margin:0 0 23px}.table-mobile-hint{display:none}.knowledge-body tbody td,.knowledge-body tbody th{background:#fff}.technical-figure{margin:26px 0 30px;border:1px solid #d6e1e5;background:#f6f9fa;padding:22px 16px 17px}.engineering-diagram{width:100%;height:auto;display:block;max-height:320px}.technical-figure figcaption{font-size:13px;color:#526774;line-height:1.55;margin-top:15px}.worked-example,.requirement-example{background:#edf3f5;border-left:3px solid #14566b;padding:24px 27px;margin:25px 0}.worked-example p:last-child,.requirement-example p:last-child{margin-bottom:0}.formula{font-size:17px;color:#183b49;font-weight:600;overflow-wrap:anywhere;padding:14px 0}.decision-list{margin:26px 0}.decision-list>div{padding:19px 0;border-block-start:1px solid #d6e1e5}.decision-list dt{font-weight:650;color:#203540;margin-bottom:6px}.decision-list dd{margin:0}
.knowledge-body .technical-sources{padding-top:30px;border-top:1px solid #b9ccd4;font-size:14px;line-height:1.6;margin-top:38px}.technical-sources h2{font-size:22px}.technical-sources ol{padding-left:20px}.technical-sources li{margin-bottom:13px;overflow-wrap:anywhere;scroll-margin-top:125px}
.related-reading{padding-top:15px;padding-bottom:64px}.related-reading h2{font-size:28px;letter-spacing:-.02em;margin:0 0 25px}.related-reading>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 38px;border-top:1px solid #b9ccd4}.related-reading a{padding:19px 0;border-bottom:1px solid #d6e1e5;font-size:17px;text-underline-offset:4px}
.mass-calculator{background:#edf3f5;border:1px solid #b9ccd4;padding:28px;margin:26px 0}.calculator-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:24px 0}.calculator-fields label{display:grid;gap:8px;font-size:14px;font-weight:600;color:#203540}.calculator-fields input,.calculator-fields select{width:100%;min-width:0;border:1px solid #9bb6c3;border-radius:3px;background:white;padding:12px;font:inherit;font-weight:400;color:#203540;min-height:46px}.calculator-fields [hidden]{display:none!important}.calculator-fields input[aria-invalid=true]{border:2px solid #a73e46}.mass-calculator output{display:block;margin-top:24px;background:#fff;padding:20px;color:#183b49;font-size:19px;font-weight:600;border-left:3px solid #14566b}.mass-calculator .caption{font-size:13px;line-height:1.6;margin:18px 0 0}.mass-calculator p{font-size:15px}.mass-calculator button{cursor:pointer}
.resource-directory .resource-group{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;border-top:1px solid #b9ccd4;padding:30px 0}.resource-group h3{font-size:23px;margin:0;max-width:17ch}.resource-group ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 35px}.resource-group li{margin:0}.resource-group a{font-weight:600;font-size:17px;text-underline-offset:4px}.resource-group li p{font-size:14px;line-height:1.65;color:#526774;margin:9px 0 0}.resources-page .resource-library{padding-top:28px}
@media(max-width:1050px){.knowledge-layout{grid-template-columns:190px minmax(0,1fr);gap:38px}.specification-hero{gap:34px}.specification-hero .lead{font-size:17px}.resource-directory .resource-group{grid-template-columns:200px minmax(0,1fr);gap:24px}.resource-group ul{gap:24px}}
@media(max-width:760px){.content-breadcrumb{font-size:12px;padding-top:20px}.content-breadcrumb li[aria-current]{flex-basis:100%}.specification-hero{grid-template-columns:1fr;gap:28px;padding-top:15px;padding-bottom:30px}.specification-hero h1{max-width:20ch}.specification-hero figure{max-width:460px;width:100%;justify-self:center}.guide-hero{padding:30px 0}.guide-hero .lead{font-size:18px}.guide-meta{font-size:12px}.knowledge-layout{grid-template-columns:1fr;gap:34px;padding-top:30px}.page-toc{position:static;top:auto;padding-top:14px}.page-toc ol{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px 20px;margin-bottom:18px}.page-toc a{font-size:13px}.page-toc>.text-link{font-size:14px}.knowledge-body{font-size:16px;line-height:1.75;max-width:none}.knowledge-body h2{font-size:26px}.knowledge-body>section{margin-bottom:35px}.knowledge-body table{min-width:510px;font-size:14px}.technical-figure{padding:14px 8px}.worked-example,.requirement-example{padding:21px 19px}.related-reading{padding-bottom:40px}.related-reading h2{font-size:25px}.related-reading a{font-size:15px}.related-reading>div{gap:0 22px}.mass-calculator{padding:22px 18px}.calculator-fields{gap:18px 15px}.mass-calculator output{font-size:17px;padding:16px}.resource-directory .resource-group{grid-template-columns:1fr;gap:24px}.resource-group h3{max-width:none}.resource-group ul{grid-template-columns:1fr;gap:25px}}
@media(prefers-reduced-motion:reduce){.knowledge-body *{scroll-behavior:auto}}
@media(max-width:760px){.knowledge-body .table-mobile-hint{display:block;font-size:12px;color:#526774;margin:22px 0 -15px}}
.page-toc-details>summary{font-size:16px;font-weight:650;cursor:pointer;padding:6px 0 17px;min-height:44px;color:#203540}.page-toc-details:not([open]){margin-bottom:10px}.page-toc-details nav{padding-top:6px}.mobile-comparison{display:none}.drawing-routes{display:flex;gap:10px 18px;flex-wrap:wrap;margin-top:22px;font-size:14px}.drawing-routes span{flex-basis:100%;font-weight:600}.drawing-routes a{min-height:32px;text-underline-offset:4px}.mass-calculator #mass-inquiry{margin-top:18px}.mass-calculator [hidden]{display:none!important}.mass-calculator output[data-state=pending]{font-size:16px;font-weight:400;border-left-color:#647f8c}.urgent-note{padding:24px;border:1px solid #cda9ad;border-left:4px solid #9f4850;background:#fff8f8}.urgent-note h2{font-size:24px}.diagram-mobile{display:none}.comparison-item dt{font-weight:600}.comparison-item dd{margin:4px 0 0}.comparison-item dl{margin:0}.comparison-item dl>div+div{margin-top:12px}
@media(max-width:760px){.guide-hero{padding:23px 0}.guide-context{display:none}.guide-hero h1{font-size:32px;margin-top:0;margin-bottom:18px}.guide-hero .lead{font-size:17px;line-height:1.6;margin-bottom:16px}.guide-meta{font-size:11px;gap:8px}.content-breadcrumb{padding-top:15px;padding-bottom:13px}.content-breadcrumb li[aria-current]{display:none}.knowledge-layout{gap:23px;padding-top:22px}.page-toc{border-top-width:1px;padding-top:4px}.page-toc>a{display:none}.page-toc-details>summary{padding-bottom:8px}.page-toc ol{grid-template-columns:1fr;gap:0;margin-bottom:12px}.page-toc li a{padding:10px 0;min-height:44px;font-size:14px}.specification-hero{padding-top:10px;gap:15px}.specification-hero .lead{font-size:17px;margin-bottom:18px}.specification-hero h1{font-size:35px;margin-bottom:18px}.specification-hero figure{max-width:260px}.specification-hero img{aspect-ratio:1.6;object-fit:contain}.specification-hero .caption{font-size:12px;line-height:1.5;margin-top:12px}.drawing-routes{margin-top:15px;gap:3px 18px}.drawing-routes a{display:flex;align-items:center;min-height:44px}.knowledge-body .table-scroll.read-as-cards{display:none}.mobile-comparison{display:block;border-top:2px solid #b9ccd4;margin:24px 0}.knowledge-body .comparison-caption{font-size:14px;font-weight:600;padding-top:14px;color:#203540}.comparison-item{padding:18px 0;border-top:1px solid #d6e1e5}.knowledge-body .comparison-item h3{font-size:19px;margin-bottom:13px}.comparison-item dt{font-size:13px;color:#526774}.comparison-item dd{font-size:15px;line-height:1.6;overflow-wrap:anywhere}.diagram-wide{display:none}.diagram-mobile{display:grid;gap:18px}.diagram-panel{max-height:290px}.mass-calculator .actions{align-items:stretch;flex-direction:column}.mass-calculator .actions button{text-align:center}.urgent-note{padding:20px 17px}.urgent-note h2{font-size:23px}}

@media(max-width:760px){.specification-hero{grid-template-columns:minmax(0,1fr) 106px;gap:16px}.specification-hero>div{display:contents}.specification-hero h1{grid-column:1;grid-row:1;font-size:30px;margin:0;align-self:center}.specification-hero figure{grid-column:2;grid-row:1;width:106px;max-width:106px;align-self:center}.specification-hero img{aspect-ratio:1;object-fit:cover}.specification-hero figcaption{position:static;font-size:10px;text-align:center;padding:4px 0}.specification-hero .lead,.specification-hero .actions,.specification-hero .drawing-routes,.specification-hero .caption{grid-column:1/-1;margin:0}.specification-hero .actions{gap:10px;align-items:center}.specification-hero .actions .text-link{display:flex;align-items:center;min-height:44px}.specification-hero .drawing-routes{gap:0 18px}.specification-hero .caption{font-size:12px}}

.product-tool-links{font-size:15px;margin-top:24px;color:#526774}.product-spec-table .mobile-comparison{display:none}
.curve-legend{font-size:15px;line-height:1.6}.curve-legend span{display:block}.curve-mobile{max-height:none}
.spec-overview{margin:0;border-top:2px solid #14566b}.spec-overview>div{display:grid;grid-template-columns:160px 1fr;gap:18px;padding:15px 0;border-bottom:1px solid #d6e1e5}.spec-overview dt{font-weight:600;color:#203540}.spec-overview dd{margin:0}.product-overview .caption{margin-top:14px}.product-inquiry-summary{background:#edf3f5;padding:22px}
@media(max-width:760px){.spec-overview>div{grid-template-columns:1fr;gap:5px;padding:13px 0}.spec-overview dd{font-size:16px}}
@media(max-width:760px){.dimension-diagram text{font-size:32px}.technical-figure figcaption{font-size:14px}.technical-figure .curve-legend{margin-bottom:14px}}
@media(max-width:760px){.product-spec-table .read-as-cards{display:none}.product-spec-table .mobile-comparison{display:block}.product-spec-table .comparison-caption{font-size:14px;font-weight:600;color:#203540}.product-spec-table .comparison-item h3{font-size:20px;margin:0 0 14px}.product-spec-table .comparison-item dt{font-size:13px;color:#526774}.product-spec-table .comparison-item dd{font-size:15px;line-height:1.6}.product-spec-table .comparison-item a{display:inline-block;padding:5px 0}}

/* Topic-specific resource imagery: preserve the complete product and diagram frame. */
.guide-hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:44px;align-items:center}
.guide-hero-grid>div{min-width:0}.guide-hero-grid h1{max-width:23ch}.guide-hero-grid .lead{font-size:18px;max-width:58ch}
.guide-cover{margin:0;min-width:0}.guide-cover img{display:block;width:100%;height:auto;aspect-ratio:3/2;background:#e9eff2}
.guide-cover figcaption{font-size:12px;line-height:1.65;color:#526774;margin-top:11px;max-width:70ch}
.resource-category-nav{display:flex;flex-wrap:wrap;gap:10px 26px;margin:8px 0 32px}
.resource-category-nav a{font-size:14px;line-height:1.6;text-underline-offset:5px;padding:6px 0}
.resource-directory .resource-group{display:block;padding:32px 0 38px;scroll-margin-top:112px}
.resource-directory .resource-group h3{font-size:25px;max-width:none;margin:0 0 26px}
.resource-directory .resource-group ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 40px}
.resource-directory .resource-card{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1fr);gap:22px;align-items:start;color:#203540;text-decoration:none;font-size:inherit;font-weight:400}
.resource-card-image{overflow:hidden;background:#edf3f5}.resource-card-image img{display:block;width:100%;height:auto;aspect-ratio:3/2}
.resource-card-copy{min-width:0}.resource-card-copy h4{font-size:20px;line-height:1.32;font-weight:600;letter-spacing:-.015em;margin:0}
.resource-directory .resource-card-copy p{font-size:14px;line-height:1.65;margin:10px 0;color:#526774}
.resource-read{display:inline-block;font-size:13px;line-height:1.6;color:#14566b;text-decoration:underline;text-underline-offset:4px}
.resource-card:hover h4{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
.resource-card:focus-visible{outline:3px solid #14566b;outline-offset:6px}
.resource-explainer,.licensed-reference{margin:30px 0 32px}
.resource-explainer picture,.resource-explainer img,.licensed-reference img{display:block;width:100%;height:auto}
.resource-explainer figcaption,.licensed-reference figcaption{font-size:14px;line-height:1.7;color:#526774;margin-top:13px}
.licensed-reference img{border:1px solid #d6e1e5}.licensed-reference.reference-small{max-width:601px;margin-inline:auto}
.image-credit{display:block;margin-top:7px;font-size:12px;overflow-wrap:anywhere}
@media(max-width:1050px){.guide-hero-grid{gap:30px}.guide-hero-grid h1{font-size:40px}.resource-directory .resource-group ul{gap:28px}.resource-directory .resource-card{gap:17px;grid-template-columns:minmax(0,.72fr) minmax(0,1fr)}.resource-card-copy h4{font-size:19px}}
@media(max-width:900px){.guide-hero-grid{grid-template-columns:1fr;gap:28px}.guide-hero-grid h1{font-size:clamp(32px,5.5vw,48px);max-width:25ch}.guide-cover{width:100%;max-width:660px;justify-self:center}.guide-hero-grid .lead{max-width:68ch}.guide-meta{margin-top:20px}.resource-directory .resource-group ul{grid-template-columns:1fr;gap:28px}.resource-directory .resource-card{grid-template-columns:minmax(0,.55fr) minmax(0,1fr);gap:24px}.resource-card-copy h4{font-size:22px}.resource-directory .resource-card-copy p{font-size:16px;max-width:45ch}}
@media(max-width:600px){.guide-cover figcaption{font-size:12px}.resource-directory .resource-group h3{font-size:23px;margin-bottom:22px}.resource-directory .resource-card{grid-template-columns:118px minmax(0,1fr);gap:17px}.resource-card-copy h4{font-size:18px}.resource-directory .resource-card-copy p{font-size:14px;margin:9px 0}.resource-directory .resource-group{padding:26px 0 30px}.resource-category-nav{gap:6px 20px;margin-bottom:26px}.resource-category-nav a{font-size:13px}.resource-explainer[data-panels="2"] img{aspect-ratio:372/648}.resource-explainer[data-panels="3"] img{aspect-ratio:372/964}.resource-explainer figcaption,.licensed-reference figcaption{font-size:13px}.resource-read{font-size:13px}.guide-hero-grid .lead{font-size:18px}}
@media(max-width:360px){.resource-directory .resource-card{grid-template-columns:100px minmax(0,1fr);gap:14px}.resource-card-copy h4{font-size:17px}}