.icn-hub-page{--icn-text:#20384f;--icn-muted:#617182;--icn-border:#e1e6ea;--icn-soft:#f5f7f9;--icn-radius:15px;color:var(--icn-text)}
.icn-shell{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:28px 0 58px}.icn-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 24px;font-size:14px;color:var(--icn-muted)}.icn-breadcrumb a{text-decoration:none}.icn-hero{padding:32px;border:1px solid var(--icn-border);border-radius:22px;background:linear-gradient(180deg,#fff,#f8fafb)}.icn-kicker,.icn-eyebrow{margin:0 0 7px;font-size:13px;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--icn-muted)}.icn-hero h1{margin:0 0 16px;font-size:clamp(32px,5vw,52px);line-height:1.07}.icn-lead{max-width:900px;margin:0;font-size:18px;line-height:1.65}.icn-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}.icn-facts>div{padding:16px;border:1px solid var(--icn-border);border-radius:12px;background:#fff}.icn-facts strong{display:block;font-size:21px}.icn-facts span{font-size:13px;color:var(--icn-muted)}
.icn-alert{margin:18px 0 0;padding:16px 18px;border-radius:10px;line-height:1.6}.icn-alert-info{border-left:4px solid currentColor;background:var(--icn-soft)}.icn-section{margin-top:44px}.icn-section h2{margin:0 0 13px;font-size:clamp(25px,3.7vw,36px);line-height:1.15}.icn-section>p{line-height:1.7}.icn-section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:20px}.icn-section-head>div:first-child{max-width:740px}.icn-filter-wrap{width:min(350px,100%);font-size:13px;font-weight:750;color:var(--icn-muted)}.icn-filter-wrap span{display:block;margin-bottom:6px}.icn-filter-wrap input{width:100%;min-height:46px;padding:10px 12px;border:1px solid #cbd2d9;border-radius:9px;background:#fff}.icn-brand-group{margin:28px 0}.icn-brand-group h3{display:flex;align-items:center;gap:9px;margin:0 0 12px;font-size:22px}.icn-brand-group h3 small{display:inline-grid;place-items:center;min-width:27px;height:27px;padding:0 7px;border-radius:99px;background:var(--icn-soft);font-size:12px;color:var(--icn-muted)}.icn-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.icn-card{padding:19px;border:1px solid var(--icn-border);border-radius:var(--icn-radius);background:#fff;box-shadow:0 3px 13px rgba(0,0,0,.035)}.icn-card h4{margin:0 0 9px;font-size:18px;line-height:1.3}.icn-card h4 a{text-decoration:none}.icn-years{margin:0 0 12px;color:var(--icn-muted);font-size:14px;line-height:1.5}.icn-cta{font-weight:750;text-decoration:none}.icn-card[hidden],.icn-brand-group[hidden]{display:none!important}.icn-no-results{padding:18px;border-radius:10px;background:var(--icn-soft)}
.icn-spec-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.icn-spec-grid>div{padding:18px;border:1px solid var(--icn-border);border-radius:13px;background:#fff}.icn-spec-grid strong{display:block;margin-bottom:6px;font-size:25px}.icn-spec-grid span{font-size:14px;line-height:1.45;color:var(--icn-muted)}.icn-geometry{margin-top:18px;padding:21px;border-radius:14px;background:var(--icn-soft)}.icn-geometry h3{margin:0 0 14px}.icn-geometry dl{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:0}.icn-geometry dl>div{padding:13px;background:#fff;border-radius:10px}.icn-geometry dt{font-size:13px;color:var(--icn-muted)}.icn-geometry dd{margin:4px 0 0;font-size:18px;font-weight:800}.icn-small{font-size:13px;color:var(--icn-muted)}
.icn-safety-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.icn-safety-card{padding:22px;border:1px solid var(--icn-border);border-radius:var(--icn-radius);background:#fff}.icn-safety-card.danger{border-left:5px solid currentColor}.icn-safety-card h3{margin:0 0 13px}.icn-safety-card ul{margin:0;padding-left:20px}.icn-safety-card li{margin:9px 0;line-height:1.55}.icn-note{padding:16px 18px;border-radius:10px;background:var(--icn-soft)}
.icn-calc{display:grid;grid-template-columns:repeat(3,minmax(120px,1fr)) auto;gap:10px;align-items:end;padding:20px;border:1px solid var(--icn-border);border-radius:14px;background:#fff}.icn-calc label span{display:block;margin-bottom:6px;font-size:13px;font-weight:750}.icn-calc input{width:100%;min-height:44px;padding:9px 10px;border:1px solid #cbd2d9;border-radius:8px}.icn-calc button{min-height:44px;padding:10px 16px;border:0;border-radius:8px;cursor:pointer;font-weight:800}.icn-calc-result{margin-top:12px;padding:15px 17px;border-radius:10px;line-height:1.6}.icn-calc-result.ok{background:#f1f8f3}.icn-calc-result.bad{background:#fbf2f2}.icn-related{display:flex;flex-wrap:wrap;gap:9px}.icn-related a{padding:9px 13px;border:1px solid var(--icn-border);border-radius:999px;text-decoration:none;background:#fff}.icn-faq details{padding:15px 0;border-top:1px solid var(--icn-border)}.icn-faq details:last-child{border-bottom:1px solid var(--icn-border)}.icn-faq summary{cursor:pointer;font-weight:800}.icn-faq details p{margin:10px 0 0;line-height:1.65;color:var(--icn-muted)}.icn-sources{padding:22px;border-radius:14px;background:var(--icn-soft)}.icn-sources ul{margin-bottom:0}
@media(max-width:850px){.icn-spec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.icn-geometry dl{grid-template-columns:repeat(2,minmax(0,1fr))}.icn-calc{grid-template-columns:1fr 1fr}.icn-calc button{grid-column:1/-1}}
@media(max-width:700px){.icn-shell{width:min(100% - 20px,1120px);padding-top:16px}.icn-hero{padding:22px}.icn-facts,.icn-grid,.icn-safety-grid{grid-template-columns:1fr}.icn-section-head{display:block}.icn-filter-wrap{margin-top:15px;width:100%}.icn-spec-grid,.icn-geometry dl,.icn-calc{grid-template-columns:1fr}.icn-calc button{grid-column:auto}}