/* Fibrivo product navigation and planning tools */
.site-header{position:relative;z-index:20}.site-header nav{gap:22px}.nav-group{position:relative}.nav-group>summary{cursor:pointer;list-style:none;font-size:11px;white-space:nowrap;padding:15px 0;display:flex;align-items:center;gap:7px}.nav-group>summary::-webkit-details-marker{display:none}.nav-group>summary::after{content:'';display:block;flex:0 0 auto;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid #7c8f65;align-self:center}.nav-group[open]>summary::after{transform:rotate(180deg);border-top-color:var(--green)}.nav-dropdown{position:absolute;left:-18px;top:47px;background:#fbfcf5;border:1px solid var(--line);border-radius:6px;box-shadow:0 15px 35px #193a2420;width:250px;padding:10px;display:grid;z-index:30}.nav-dropdown a,.nav-dropdown button{padding:11px 12px!important;text-align:left;font:400 11px/1.5 var(--sans);background:none;border-radius:3px}.nav-dropdown a:hover,.nav-dropdown button:hover{background:#e6ecdc;text-decoration:none}.nav-group[open]>summary{color:#65804c}.nav-group:last-of-type .nav-dropdown{left:auto;right:-30px}.site-header .header-cta{white-space:nowrap}.hero{grid-template-columns:1fr 1.1fr;min-height:600px}.product-hero{min-height:500px}.product-hero>img{object-fit:cover;object-position:52% 50%}.image-corner{top:21px;left:21px;padding:10px 13px}.image-corner strong{font-size:18px}.image-corner>span{font-size:6px}.thickness-badge{font:600 29px/1 var(--display);letter-spacing:-1px;border-right:1px solid #c8d0c1;padding-right:17px;color:var(--ink)}.thickness-badge>span{display:block;font:500 7px/1.5 var(--sans);letter-spacing:1.6px;margin-top:5px}.thickness-callout{position:absolute;right:20px;bottom:20px;background:var(--green);color:#f7f9ed;border-radius:6px;padding:13px 17px;display:flex;flex-direction:column;gap:3px}.thickness-callout strong{font:500 23px/1.1 var(--display);letter-spacing:-.5px}.thickness-callout>span{font-size:7px;color:var(--lime)}.product-hero>figcaption{max-width:220px;bottom:20px;left:20px;font-size:7px}.benefits-strip{display:grid;grid-template-columns:repeat(3,1fr);padding:30px 5.5%;background:var(--sage);gap:32px}.benefits-strip article{display:flex;align-items:flex-start;gap:16px}.benefit-symbol{font-size:28px;line-height:1.2;color:#76895c;min-width:28px}.benefits-strip h2{font:600 17px/1.3 var(--display);letter-spacing:-.5px}.benefits-strip p{font-size:11px;color:var(--muted);line-height:1.7;margin:8px 0 0}.product-facts{display:grid;grid-template-columns:1fr 1fr 1.3fr;gap:28px;border-top:1px solid #cdd5c4;padding-top:30px;margin-top:40px}.product-facts>div{padding-right:24px;border-right:1px solid #cdd5c4}.product-facts>div:last-child{border:0;padding:0}.product-facts .eyebrow{font-size:7px}.product-facts strong{display:block;font:550 23px/1.4 var(--display);letter-spacing:-.8px;margin-top:12px}.product-facts small{font:400 11px/1.4 var(--sans);letter-spacing:0;color:var(--muted)}.product-facts p{font-size:11px;line-height:1.8;color:var(--muted);margin:10px 0 0}.product-facts a{font-size:10px;display:block;margin-top:13px}.application-tabs{grid-template-columns:repeat(5,1fr)}.application-tabs button{font-size:10px;padding:15px 13px}.product-card>img{object-fit:cover}.buying-section{padding-bottom:40px}.buying-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin-top:35px}.buying-grid>a,.buying-grid>button{background:#eef0e4;text-align:left;padding:27px;border:1px solid var(--line);border-radius:6px;display:flex;flex-direction:column;align-items:flex-start;color:var(--ink)}.buying-grid>a:hover,.buying-grid>button:hover{background:#e6ebd8}.buying-grid>a>span,.buying-grid>button>span{font:500 32px/1 var(--display);color:#8b9b75;letter-spacing:-1px}.buying-grid h3{font-size:21px;line-height:1.3;margin:24px 0 13px}.buying-grid p{font-size:12px;color:var(--muted);line-height:1.8;margin:0 0 23px}.buying-grid b{font-size:10px;font-weight:550;margin-top:auto}.estimator-section{padding-top:45px}.estimator-layout{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:start}.estimator-label{display:flex;justify-content:space-between;gap:20px;align-items:baseline}.estimator-label h3{font-size:20px;margin:0 0 17px}.estimator-label>span{font-size:9px;color:var(--muted)}.surface-row{border:1px solid var(--line);padding:14px 17px 18px;border-radius:5px;margin:0 0 16px;min-width:0}.surface-row legend{font-size:9px;letter-spacing:1px;padding:0 7px}.surface-inputs{display:grid;grid-template-columns:1fr 1fr 1fr 28px;gap:12px;align-items:end}.surface-inputs label,.estimate-options label,.quantity-grid label{display:flex;flex-direction:column;font-size:9px;gap:7px;min-width:0}.surface-inputs input{padding:9px;width:100%;min-width:0;font-size:12px}.remove-surface{font-size:21px;background:none;height:39px;color:#7e8b72}.remove-surface:disabled{opacity:.25;cursor:not-allowed}.add-surface{font-size:11px;color:var(--ink);background:none;border-bottom:1px solid #b3c39d;padding:4px 0 8px}.estimate-options{max-width:250px;margin:24px 0}.quantity-options{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:20px 0 25px;padding:17px 0}.quantity-options summary{font-size:12px;cursor:pointer}.quantity-options summary>span{font-size:9px;color:var(--muted);margin-left:10px}.quantity-options p{font-size:11px;color:var(--muted);line-height:1.8}.quantity-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.quantity-grid input{min-width:0}.estimate-results{background:var(--green);color:#f5f8ec;border-radius:7px;padding:29px;position:sticky;top:25px}.estimate-main{padding:24px 0;border-bottom:1px solid #566d53}.estimate-main>strong{display:block;font:500 52px/1.1 var(--display);letter-spacing:-2px;overflow-wrap:anywhere}.estimate-main>span{font-size:10px;color:#ced8be}.estimate-results dl{font-size:11px;margin:20px 0}.estimate-results dl>div{display:flex;justify-content:space-between;gap:20px;padding:7px 0}.estimate-results dd{margin:0;text-align:right;font-weight:500}.estimate-results dt{color:#c6d0bc}.estimate-results p{font-size:10px;color:#c9d5bf;margin:16px 0 23px}.estimate-results .button{width:100%;font-size:11px}.estimate-results .button:disabled{opacity:.45;cursor:not-allowed;filter:none}.estimate-results small{font-size:9px;color:#b6c4ab;display:block;line-height:1.8;margin-top:18px}.form-error{font-size:11px;color:#984d34;margin:12px 0}.learning-section{background:#ecefe4;max-width:none}.learning-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:23px}.learning-grid>button{display:flex;flex-direction:column;align-items:flex-start;text-align:left;background:#fafaf4;border:1px solid var(--line);border-radius:5px;padding:28px}.learning-grid>button:hover{background:#f1f5e9}.resource-number{font-size:8px;letter-spacing:1.4px;color:#6c7b5d}.learning-grid h3{font-size:23px;margin:27px 0 12px;line-height:1.35}.learning-grid p{font-size:12px;line-height:1.8;color:var(--muted);margin:0 0 24px}.learning-grid b{font-size:10px;font-weight:500;margin-top:auto}.technical-panel{margin-top:35px;padding-top:32px;border-top:1px solid #cad3bd;display:grid;grid-template-columns:1fr 1fr;gap:45px}.technical-panel h3{font-size:24px;line-height:1.35;margin:16px 0}.technical-panel p{font-size:11px;color:var(--muted);line-height:1.9;margin:0;max-width:470px}.technical-panel ul{padding:0;list-style:none;margin:0}.technical-panel li{border-bottom:1px solid #cad3bd;padding:14px 0;display:flex;flex-direction:column;gap:4px}.technical-panel li>span{font-size:12px;font-weight:500}.technical-panel li>em{font-size:10px;font-style:normal;color:var(--muted)}.footer-links{display:flex;gap:27px;margin:0 0 24px;font-size:10px}.footer-links button{background:none;padding:0;font-size:10px}.footer-top p a{text-decoration:underline;text-underline-offset:3px}.quote-estimate-note{padding:12px;background:#e3ebd4;font-size:11px;border-radius:4px}.brief-actions{flex-wrap:wrap;gap:17px}.brief-actions .button{font-size:10px;padding:14px 20px}#article-dialog{max-width:760px}#article-body h3{font-size:19px;margin:26px 0 10px}#article-body p,#article-body li{font-size:13px;color:var(--muted);line-height:1.9}#article-body li{margin-bottom:15px}#article-body ol{padding-left:20px}#article-body a{text-decoration:underline;text-underline-offset:3px}.article-source{font-size:10px!important;border-top:1px solid var(--line);margin-top:25px;padding-top:20px}.comparison-table{overflow-x:auto}.comparison-table table{border-collapse:collapse;width:100%;font-size:12px}.comparison-table th,.comparison-table td{text-align:left;padding:13px;border:1px solid var(--line);vertical-align:top}.comparison-table th{background:#e5ecdb}.comparison-table td:first-child{min-width:130px}
@media(min-width:1600px){.benefits-strip,.learning-section{padding-left:max(5.5%,calc((100% - 1424px)/2));padding-right:max(5.5%,calc((100% - 1424px)/2))}}
@media(max-width:1100px){.site-header nav{gap:15px}.nav-group>summary,.site-header nav>a{font-size:10px}.site-header .brand>span{font-size:27px}.site-header .brand small{font-size:6px}.site-header .header-cta{font-size:10px;padding:13px 17px;gap:13px}.benefits-strip{padding:26px 4%;gap:25px}.benefits-strip h2{font-size:15px}.benefits-strip p{font-size:10px}.product-facts{gap:20px}.product-facts strong{font-size:19px}.buying-grid{gap:15px}.buying-grid>a,.buying-grid>button{padding:22px}.buying-grid h3{font-size:19px}.estimator-layout{gap:25px}.estimate-results{padding:25px}.learning-grid{gap:16px}.learning-grid>button{padding:24px}.learning-grid h3{font-size:21px}.technical-panel{gap:30px}}
@media(max-width:950px){.site-header{height:86px;flex-wrap:nowrap}.site-header nav{display:none;position:absolute;top:85px;left:0;right:0;padding:20px 5%;background:var(--cream);z-index:30;border-bottom:1px solid var(--line);box-shadow:0 15px 20px #1c3a2614}.site-header nav.open{display:flex;flex-direction:column;align-items:stretch;gap:5px;max-height:78vh;overflow:auto}.site-header nav>a,.nav-group>summary{font-size:13px;padding:12px 0}.nav-dropdown{position:static;width:auto;box-shadow:none;background:#edf1e5;border:0;padding:7px;margin:0 0 8px}.nav-dropdown a,.nav-dropdown button{font-size:12px}.site-header .header-cta{margin-left:auto;display:inline-flex}.menu-toggle{display:block;font-size:26px}.product-facts{grid-template-columns:1fr 1fr}.product-facts>div:nth-child(2){border:0}.product-facts>div:last-child{grid-column:1/-1;border-top:1px solid #cdd5c4;padding-top:20px}.application-tabs{grid-template-columns:repeat(3,1fr)}.estimator-layout{grid-template-columns:1fr}.estimate-results{position:static}.estimate-results dl{display:grid;grid-template-columns:1fr 1fr;gap:2px 30px}.estimate-results .button{width:auto}.estimate-main>strong{font-size:48px}.learning-grid h3{font-size:18px}.buying-grid p,.learning-grid p{font-size:11px}.benefits-strip{gap:18px}.benefits-strip article{gap:10px}.benefit-symbol{font-size:24px;min-width:24px}}
@media(max-width:650px){.site-header{height:80px}.site-header nav{top:79px}.site-header .header-cta{display:none}.menu-toggle{margin-left:auto}.hero{min-height:0;grid-template-columns:1fr}.product-hero{min-height:0;height:400px}.image-corner{left:18px;top:18px}.thickness-callout{right:17px;bottom:18px;padding:11px 13px}.thickness-callout strong{font-size:20px}.thickness-callout>span{font-size:6px}.product-hero>figcaption{max-width:160px;font-size:6px;left:16px;bottom:18px}.hero-note{padding-top:24px}.thickness-badge{font-size:27px}.benefits-strip{grid-template-columns:1fr;padding:29px 22px;gap:24px}.benefits-strip h2{font-size:19px}.benefits-strip p{font-size:12px;margin-top:5px}.benefits-strip article{gap:17px}.benefit-symbol{font-size:27px;min-width:30px}.product-facts{grid-template-columns:1fr;margin-top:30px;gap:22px;padding-top:25px}.product-facts>div{border:0;padding-right:0;padding-bottom:20px;border-bottom:1px solid #cdd5c4}.product-facts>div:nth-child(2){border-bottom:1px solid #cdd5c4}.product-facts>div:last-child{grid-column:auto;border:0;padding-top:0;padding-bottom:0}.product-facts strong{font-size:23px}.product-facts p{font-size:12px}.product-facts .eyebrow{font-size:8px}.application-tabs{grid-template-columns:1fr 1fr}.application-tabs button{font-size:10px;padding:14px 12px}.application-tabs button:last-child{grid-column:1/-1}.buying-grid{grid-template-columns:1fr}.buying-grid>a,.buying-grid>button{padding:25px}.buying-grid h3{font-size:23px;margin-top:18px}.buying-grid p{font-size:12px}.buying-section{padding-bottom:25px}.estimator-section{padding-top:25px}.estimator-label{align-items:flex-start;flex-direction:column;gap:0;margin-bottom:20px}.estimator-label h3{margin-bottom:4px}.surface-row{padding:12px}.surface-inputs{grid-template-columns:1fr 1fr;gap:12px}.surface-inputs label{font-size:9px}.surface-inputs>.remove-surface{justify-self:end;width:35px}.quantity-grid{grid-template-columns:1fr 1fr}.quantity-grid>label:last-child{grid-column:1/-1;max-width:180px}.quantity-options summary{font-size:11px}.estimate-options{max-width:210px}.estimate-results{padding:26px}.estimate-results dl{display:block}.estimate-results dl>div{padding:9px 0;font-size:11px}.estimate-results .button{width:100%}.learning-grid{grid-template-columns:1fr}.learning-grid>button{padding:25px}.learning-grid h3{font-size:25px;margin-top:21px}.learning-grid p{font-size:12px}.technical-panel{grid-template-columns:1fr;gap:20px}.technical-panel h3{font-size:25px}.technical-panel p{font-size:12px}.footer-links{gap:22px;flex-wrap:wrap}.footer-links a,.footer-links button{font-size:10px}#article-body p,#article-body li{font-size:12px}.comparison-table table{font-size:11px}.comparison-table th,.comparison-table td{padding:10px}.comparison-table td:first-child{min-width:100px}}

/* Keep the complete slender batt stack visible at every viewport width. */
.product-hero{align-self:center;min-height:0;height:auto;padding-bottom:68px;background:#ebe7dc}
.product-hero>img{position:relative;display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:contain;inset:auto}
.product-card>img{height:auto;aspect-ratio:3/2;object-fit:contain}
.site-header .mobile-quote{display:none}
.installation-image{margin:0;align-self:stretch;display:flex;background:#e3e3d7}
.installation-image img{display:block;width:100%;height:100%;min-height:0;aspect-ratio:4/3;object-fit:cover;object-position:center;flex:1}
@media(max-width:650px){.installation-image img{height:auto;flex:none}}
@media(max-width:650px){.site-header .mobile-quote{display:flex;margin-top:12px;justify-content:space-between}}