.ifh{--ifh-ink:#152237;--ifh-blue:#2158b5;--ifh-line:#dce5ef;--ifh-red:#df271c;color:var(--ifh-ink);font:15px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;max-width:1440px;margin:0 auto;padding:24px 20px 48px;text-align:left}.ifh *{box-sizing:border-box}.ifh h1,.ifh h2,.ifh h3,.ifh p{margin:0 0 12px;line-height:1.3}.ifh .ifh-title{font-size:clamp(34px,4vw,56px);letter-spacing:-1.5px;font-weight:800}.ifh h2{font-size:23px}.ifh h3{font-size:24px}.ifh a{color:var(--ifh-blue)}.ifh-hero{display:grid;grid-template-columns:1.5fr 1fr;gap:52px;padding:34px 40px;background:linear-gradient(110deg,#edf4fe,#f8fafc);border-top:4px solid var(--ifh-blue);margin-bottom:24px}.ifh-eyebrow{display:block;font-size:11px;letter-spacing:1.3px;font-weight:800;color:#385579;margin-bottom:16px}.ifh-hero>div>p{max-width:640px;font-size:18px;color:#4c6077}.ifh-brandline{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.ifh-brandline span{border:1px solid #c6d5e9;background:#fff;padding:5px 12px;border-radius:5px;font-size:13px;font-weight:700}.ifh-hero aside{border-left:1px solid #cbd9ea;padding-left:36px;align-self:center}.ifh-hero aside strong{display:block;font-size:21px;margin:15px 0}.ifh-hero aside p{max-width:310px;color:#52667e}.ifh-hero-icon{display:inline-block;font-size:28px;border:2px solid #adbed5;border-radius:8px;padding:4px 18px;letter-spacing:5px;font-weight:800}.ifh-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:30px}.ifh-filters{background:#f6f8fb;border:1px solid var(--ifh-line);border-radius:8px;padding:20px;align-self:start}.ifh-filters h2{font-size:21px}.ifh-filters label{display:block;font-size:13px;font-weight:750;margin:15px 0 5px}.ifh-filters label span{float:right;color:#66778b}.ifh input,.ifh select{display:block;width:100%;min-width:0;min-height:44px;padding:8px 10px;background:white;color:var(--ifh-ink);border:1px solid #afbed1;border-radius:5px;font:inherit;font-size:14px}.ifh input:focus,.ifh select:focus,.ifh a:focus-visible,.ifh button:focus-visible,.ifh summary:focus-visible{outline:3px solid #2261c4;outline-offset:3px}.ifh fieldset{border:0;border-top:1px solid var(--ifh-line);padding:14px 0 0;margin:25px 0 0;min-width:0}.ifh legend{font-weight:750;font-size:14px;padding:0 4px 0 0}.ifh .ifh-help{font-size:12px;color:#56667a}.ifh .ifh-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--ifh-blue);color:#fff;border:0;border-radius:5px;font:inherit;font-weight:750;font-size:14px;min-height:44px;padding:11px 17px;text-decoration:none;text-align:center;cursor:pointer}.ifh-filters .ifh-button{width:100%;margin-top:20px}.ifh .ifh-button:hover{background:#163e84}.ifh-reset{display:block;text-align:center;margin-top:12px;padding:7px;font-size:13px}.ifh-results{min-width:0}.ifh-results-head{border-bottom:1px solid var(--ifh-line);padding-bottom:12px;margin:0 0 22px}.ifh-results-head p{color:#55657a;font-size:14px}.ifh-results h2 span{font-size:16px;background:#eaf0f9;padding:3px 9px;border-radius:12px;display:inline-block}.ifh-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.ifh-card{border:1px solid var(--ifh-line);border-top:3px solid var(--ifh-blue);border-radius:6px;padding:18px;background:#fff;display:flex;flex-direction:column;min-width:0;overflow-wrap:anywhere}.ifh-card-head{display:flex;justify-content:space-between;gap:7px;flex-wrap:wrap;align-items:center;margin-bottom:14px;font-size:12px;font-weight:750;color:#4c6077}.ifh-badge{background:#eaf3ee;color:#21603e;padding:4px 7px;border-radius:4px;font-size:10px}.ifh-badge-review{background:#fff2d9;color:#765015}.ifh-photo{display:block;max-width:100%;object-fit:contain;align-self:center;margin:2px 0 18px}.ifh-code{font-size:12px;color:#59697d}.ifh-specs{margin:8px 0 14px;font-size:13px}.ifh-specs>div{padding:9px 0;border-top:1px solid #e7ecf2}.ifh-specs dt{color:#53647b;margin-bottom:3px}.ifh-specs dd{margin:0;font-weight:700}.ifh-specs small{display:block;font-weight:400;color:#53647b;margin-top:4px}.ifh details{font-size:12px;margin:8px 0 14px}.ifh summary{cursor:pointer;color:#234f87;font-weight:700;min-height:36px;padding:6px 0}.ifh-detail{padding:10px;background:#f6f8fb}.ifh-detail ul,.ifh-review ul,.ifh-excluded ul{padding-left:17px}.ifh-detail li,.ifh-review li,.ifh-excluded li{margin:7px 0}.ifh-purchase{margin-top:auto;display:grid;gap:12px;padding-top:16px;font-size:13px}.ifh-purchase .ifh-button{width:100%}.ifh-review{background:#fff7e7;border-left:3px solid #bd8325;padding:12px;font-size:12px;margin:8px 0}.ifh-pending-title{margin-top:38px!important}.ifh-empty{padding:22px;border:1px dashed #b7c6d9;background:#f7f9fc;border-radius:5px}.ifh-empty p{margin:10px 0 0}.ifh-excluded{padding:12px;border:1px solid var(--ifh-line);margin-top:24px!important}.ifh-support{display:flex;gap:25px;align-items:center;justify-content:space-between;padding:25px;background:#edf3fc;border-radius:6px;margin-top:30px}.ifh-support h2{font-size:21px}.ifh-support p{max-width:590px;font-size:14px;margin-bottom:0}.ifh-support .ifh-button{flex-shrink:0;background:#193959}.ifh-preview{font-size:12px;background:#fff7e4;padding:10px 15px;border:1px solid #ecdbb1}.ifh ul{margin-bottom:0}@media(max-width:1240px){.ifh-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:850px){.ifh-layout{grid-template-columns:220px minmax(0,1fr);gap:18px}.ifh-grid{grid-template-columns:1fr}.ifh-hero{gap:24px;padding:26px}.ifh-hero aside{padding-left:24px}.ifh-support{display:block}.ifh-support .ifh-button{margin-top:18px}}@media(max-width:600px){.ifh{padding:12px 12px 32px}.ifh-hero{grid-template-columns:1fr;padding:24px 20px;gap:22px}.ifh-hero aside{border-left:0;border-top:1px solid #cbd9ea;padding:18px 0 0}.ifh-hero aside strong{font-size:18px;margin-top:0}.ifh-hero-icon{display:none}.ifh-hero aside p{max-width:none;font-size:14px}.ifh-layout{grid-template-columns:1fr}.ifh-filters{padding:18px}.ifh-filters h2{margin-bottom:15px}.ifh-grid{grid-template-columns:1fr}.ifh-card{padding:20px}.ifh h2{font-size:21px}.ifh-support .ifh-button{width:100%}}

.ifh-pages{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0}.ifh-pages a{display:grid;place-items:center;width:44px;min-height:44px;border:1px solid #b7c6d9;border-radius:5px;text-decoration:none;font-weight:700}.ifh-pages a[aria-current="page"]{background:#2158b5;color:#fff}

/* Native ShopGold purchasing controls scoped to the flow heater integrator. */
.ifh-nav{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:20px}.ifh .ifh-home,.ifh .ifh-cart-link{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 16px;border:1px solid #afbed1;border-radius:5px;text-decoration:none;font-weight:750;font-size:14px}.ifh .ifh-home{color:#193959;background:#fff}.ifh .ifh-cart-link{color:#fff;background:#193959;border-color:#193959}.ifh-nav-bottom{border-top:1px solid var(--ifh-line);padding-top:24px;margin:28px 0 0}.ifh .ifh-product-link{display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:44px;text-align:center;font-weight:750;text-decoration:underline}.ifh-buy{display:grid;gap:12px}.ifh-quantity{font-size:13px;font-weight:700}.ifh-quantity>span{display:flex;align-items:center;gap:9px;margin-top:6px}.ifh .ifh-quantity input{display:block;width:92px;max-width:92px;flex:0 0 92px;min-height:44px;margin:0;text-align:center}.ifh .ifh-buy .DoKoszyka{display:flex;align-items:center;justify-content:center;width:100%;min-height:46px!important;padding:11px 12px;margin:0;border:0;border-radius:5px;background:#2158b5;color:#fff;font:inherit;font-size:14px;font-weight:750;line-height:1.4;text-indent:0;white-space:normal;cursor:pointer}.ifh .ifh-buy .DoKoszyka:hover{background:#163e84}.ifh .ifh-buy .DoKoszyka:focus-visible{outline:3px solid #2261c4;outline-offset:3px}.ifh .ifh-purchase-note{font-size:12px;color:#59697d;margin:0}@media(max-width:600px){.ifh-nav>a{width:100%}}

/* Water heater filters and electrical specifications. */
.ifh-hero aside{display:flex;flex-direction:column;gap:9px}.ifh-hero aside>span{display:block;padding:9px 13px;border:1px solid #c6d5e9;border-radius:5px;background:white;font-weight:750;font-size:16px}.ifh-hero aside>p{font-size:13px;margin:6px 0 0}.ifh .ifh-check{display:flex;align-items:center;gap:9px;min-height:39px;font-weight:400;margin:0;cursor:pointer}.ifh .ifh-check input{display:inline-block;flex:0 0 18px;width:18px;height:18px;min-height:18px;padding:0;accent-color:var(--ifh-blue)}.ifh-filters fieldset:first-of-type{border:0;padding:0;margin:16px 0 20px}.ifh-results-head h2{display:flex;gap:10px;align-items:center}.ifh-photo-link{display:block;text-align:center}.ifh .ifh-photo{width:180px;height:140px;margin:2px auto 18px}.ifh .ifh-supply{font-size:15px;font-weight:750;background:#edf4fe;color:#2158b5;border-radius:5px;padding:9px 10px;margin:12px 0}.ifh .ifh-code{overflow-wrap:anywhere}.ifh-table-wrap{margin:14px 0}.ifh .ifh-table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:12px}.ifh-table caption{text-align:left;font-size:11px;color:#526979;margin-bottom:7px}.ifh .ifh-table th,.ifh .ifh-table td{padding:8px 5px;border:1px solid var(--ifh-line);text-align:center;overflow-wrap:anywhere}.ifh .ifh-table th{font-size:10px;background:#f4f7f9}.ifh small{display:block;font-size:11px;font-weight:400;color:#526979;line-height:1.5;margin-top:4px}.ifh .ifh-note{font-size:12px;border-left:3px solid #bd8325;background:#fff7e7;padding:9px 10px;margin:8px 0}.ifh-details ul{padding-left:18px;overflow-wrap:anywhere}.ifh-details p{margin:10px 0}.ifh .ifh-purchase{border-top:1px solid var(--ifh-line)}.ifh .ifh-purchase>strong{font-size:18px}.ifh-explanation{border:1px solid var(--ifh-line);border-radius:6px;padding:18px;font-size:13px;margin-top:24px!important}.ifh .ifh-explanation p{margin:12px 0}.ifh .ifh-results{scroll-margin-top:25px}.ifh-filters .ifh-help{margin-top:7px}.ifh-support .ifh-button{white-space:nowrap}.ifh .ifh-fuse-source{font-size:10px;line-height:1.3;margin-top:4px}.ifh .ifh-fuse-value{font-weight:800;font-size:15px}.ifh .ifh-calculation{font-size:12px;background:#edf4fe;padding:12px;border-left:3px solid #2158b5;margin:12px 0}.ifh .ifh-coverage{font-size:13px;margin:14px 0;padding:12px 15px;border:1px solid var(--ifh-line);border-radius:5px;background:#f6f8fb}

/* Existing Interex calculators: separate tabs with the filtered integrator as return target. */
.ifh-calculators{padding:20px;border:1px solid var(--ifh-line);border-top:3px solid var(--ifh-blue);border-radius:6px;margin:20px 0 26px;background:#f6f8fb}.ifh-calculators>p{font-size:14px;color:#526979}.ifh-calculator-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.ifh-calculator-links>a{display:flex;flex-direction:column;gap:6px;padding:14px;background:#fff;border:1px solid #c6d5e9;border-radius:5px;text-decoration:none;min-height:44px}.ifh-calculator-links>a:hover{border-color:#2158b5;background:#edf4fe}.ifh-calculator-links strong{font-size:14px;line-height:1.4}.ifh-calculator-links>a>span{font-size:12px;color:#526979}.ifh-calculator-links small{margin-top:auto;padding-top:4px;color:#2158b5}.ifh-calculator-body{margin:0;background:#f6f8fb}.ifh-calculator-page{max-width:1120px}.ifh-calculator-header{padding:24px;background:#edf4fe;border-top:4px solid #2158b5;margin:20px 0}.ifh-calculator-header h1{font-size:clamp(28px,4vw,40px);line-height:1.2}.ifh-calculator-header>p{max-width:900px}.ifh-calculator-switcher{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.ifh-calculator-switcher>a{display:flex;align-items:center;min-height:44px;padding:9px 12px;border:1px solid #afbed1;border-radius:5px;background:#fff;text-decoration:none;font-size:13px;font-weight:700}.ifh-calculator-switcher>a[aria-current="page"]{background:#2158b5;color:#fff;border-color:#2158b5}.ifh-calculator-return{position:sticky;top:0;z-index:10;background:#f6f8fb;padding:10px 0}.ifh-calculator-return>a{font-size:13px}.ifh-calculator-widget{background:#fff;border:1px solid var(--ifh-line);border-radius:6px;padding:18px;min-width:0}.ifh-calculator-widget #ifh-calculator-status[hidden]{display:none}.ifh-calculator-widget #ifh-calculator-status{padding:16px;background:#edf4fe;border-radius:5px}@media(max-width:850px){.ifh-calculator-links{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.ifh-calculators{padding:16px}.ifh-calculator-links{grid-template-columns:1fr}.ifh-calculator-return{position:static}.ifh-calculator-widget{padding:8px}.ifh-calculator-switcher>a{flex:1 1 145px}.ifh-calculator-header{padding:20px}}