#ecbc-boiler-compare{--ink:#00174d;--muted:#526774;--line:#dce3e5;--paper:#fafbf9;--blue:#25a2f0;--wash:#edf3f4;--accent:#89CD32;--yellow:#FED402}#ecbc-boiler-compare *{box-sizing:border-box}#ecbc-boiler-compare{scroll-behavior:smooth;scroll-padding-top:100px}#ecbc-boiler-compare{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 Arial,Helvetica,sans-serif}#ecbc-boiler-compare a{color:inherit}#ecbc-boiler-compare button,#ecbc-boiler-compare input,#ecbc-boiler-compare select{font:inherit}#ecbc-boiler-compare button,#ecbc-boiler-compare a,#ecbc-boiler-compare input,#ecbc-boiler-compare select,#ecbc-boiler-compare summary{ -webkit-tap-highlight-color:transparent}#ecbc-boiler-compare button{cursor:pointer}#ecbc-boiler-compare button:disabled{cursor:default}#ecbc-boiler-compare a:focus-visible,#ecbc-boiler-compare button:focus-visible,#ecbc-boiler-compare input:focus-visible,#ecbc-boiler-compare select:focus-visible,#ecbc-boiler-compare summary:focus-visible{outline:3px solid var(--blue);outline-offset:4px}#ecbc-boiler-compare [hidden]{display:none!important}#ecbc-boiler-compare .wrap{max-width:1240px;margin:0 auto;padding:0 36px}#ecbc-boiler-compare .skip{position:fixed;top:-80px;z-index:10;background:white;padding:12px}#ecbc-boiler-compare .skip:focus{top:8px}#ecbc-boiler-compare header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}#ecbc-boiler-compare .header{height:94px;display:flex;align-items:center;justify-content:space-between;gap:20px}#ecbc-boiler-compare .brand{text-decoration:none;display:flex;align-items:center;gap:15px}#ecbc-boiler-compare .brand img{width:126px;height:56px;object-fit:contain}#ecbc-boiler-compare .brand span{font-size:12px;line-height:1.3;letter-spacing:1px;border-left:1px solid var(--line);padding-left:16px}#ecbc-boiler-compare .brand b{display:block}#ecbc-boiler-compare .header nav{display:flex;gap:25px;font-size:13px}#ecbc-boiler-compare .header nav a{text-decoration:none}#ecbc-boiler-compare .button{display:inline-flex;align-items:center;justify-content:center;gap:25px;text-decoration:none;background:var(--ink);color:#fff;border:1px solid var(--ink);border-radius:5px;padding:15px 20px;font-weight:600;font-size:14px;transition:background .15s}#ecbc-boiler-compare .button:hover{background:#2b5365}#ecbc-boiler-compare .button.small{padding:11px 16px;font-size:12px;gap:15px}#ecbc-boiler-compare .button.secondary{background:transparent;color:var(--ink)}#ecbc-boiler-compare .hero{display:grid;grid-template-columns:1.15fr 1fr;gap:70px;padding-top:66px;padding-bottom:64px;align-items:center}#ecbc-boiler-compare .eyebrow{font-size:11px;font-weight:700;letter-spacing:1.9px;color:var(--blue);margin:0 0 19px}#ecbc-boiler-compare .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--blue);margin-right:8px}#ecbc-boiler-compare h1{font-size:clamp(40px,4.7vw,62px);line-height:1.05;letter-spacing:-2.4px;margin:0 0 25px;font-weight:600}#ecbc-boiler-compare h1 span{color:var(--blue)}#ecbc-boiler-compare .lead{max-width:460px;color:var(--muted);font-size:18px;line-height:1.6;margin-bottom:28px}#ecbc-boiler-compare .actions{display:flex;align-items:center;gap:24px}#ecbc-boiler-compare .textlink{font-size:13px;text-decoration:none;border-bottom:1px solid var(--ink);padding-bottom:3px}#ecbc-boiler-compare .disclosure{font-size:11px;color:var(--muted);margin:30px 0 0;line-height:1.7}#ecbc-boiler-compare .hero-panel{background:var(--ink);color:#fff;border-radius:10px;padding:28px 32px;position:relative;overflow:hidden}#ecbc-boiler-compare .panel-top{display:flex;justify-content:space-between;font-size:10px;letter-spacing:1.3px;color:#bcdae4}#ecbc-boiler-compare .hero-panel h2{font-weight:500;line-height:1.25;font-size:27px;letter-spacing:-.5px;margin:26px 0}#ecbc-boiler-compare .hero-panel p{color:#d2e1e6;font-size:13px;margin:24px 0 8px}#ecbc-boiler-compare .diagram{display:flex;align-items:center;gap:28px;padding:8px 0}#ecbc-boiler-compare .diagram-boiler{border:1px solid #92b6c8;border-radius:8px;width:120px;height:147px;flex-shrink:0;padding:18px 15px;background:linear-gradient(120deg,#e2ecf0,#fff);color:var(--ink);box-shadow:10px 10px 0 #ffffff08}#ecbc-boiler-compare .diagram-boiler span{font-size:11px;font-weight:800}#ecbc-boiler-compare .diagram-boiler i{display:block;background:#00174d;height:24px;width:47px;margin:23px auto 15px;border-radius:3px}#ecbc-boiler-compare .diagram-boiler b{font-size:7px;letter-spacing:.5px;display:block;text-align:center}#ecbc-boiler-compare .paths{display:flex;flex-direction:column;gap:17px;flex:1}#ecbc-boiler-compare .paths span{font-size:11px;padding:8px;border:1px solid #6a8999;border-radius:3px;position:relative}#ecbc-boiler-compare .paths span:before{content:'';height:1px;width:28px;background:#6a8999;position:absolute;left:-28px;top:50%}#ecbc-boiler-compare .diagram-caption{font-size:9px;color:#99b5c3}#ecbc-boiler-compare .evidence-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}#ecbc-boiler-compare .evidence-strip .wrap{display:flex;justify-content:space-between;padding-top:17px;padding-bottom:17px;font-size:12px;color:var(--muted)}#ecbc-boiler-compare .evidence-strip b{color:var(--ink)}#ecbc-boiler-compare .section{padding-top:64px;padding-bottom:58px}#ecbc-boiler-compare h2{font-size:34px;letter-spacing:-1px;line-height:1.2;margin:0 0 22px;font-weight:600}#ecbc-boiler-compare .section-heading{display:flex;justify-content:space-between;gap:35px;align-items:flex-end;margin-bottom:25px}#ecbc-boiler-compare .section-heading h2{margin-bottom:0}#ecbc-boiler-compare .section-heading>p{font-size:13px;max-width:325px;color:var(--muted);margin:0}#ecbc-boiler-compare .tabs{display:grid;grid-template-columns:1fr 1fr 1fr .8fr;gap:9px}#ecbc-boiler-compare .tabs button{background:#fff;color:var(--ink);text-align:left;padding:18px 16px;border:1px solid var(--line);border-radius:6px;font-size:13px;font-weight:600;line-height:1.5}#ecbc-boiler-compare .tabs button span{display:block;font-size:11px;color:var(--blue);margin-bottom:10px}#ecbc-boiler-compare .tabs button small{display:block;font-size:10px;font-weight:400;margin-top:6px}#ecbc-boiler-compare .tabs button[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}#ecbc-boiler-compare .tabs button[aria-pressed=true] span{color:var(--accent)}#ecbc-boiler-compare .category-explanation{margin:16px 0 25px;color:var(--muted);font-size:13px;border-left:2px solid var(--blue);padding:6px 14px}#ecbc-boiler-compare .filters{display:flex;gap:12px;align-items:flex-end;border-bottom:1px solid var(--line);padding-bottom:24px}#ecbc-boiler-compare .filters label{font-size:10px;letter-spacing:.2px;flex:1;min-width:0;font-weight:600}#ecbc-boiler-compare .filters label:first-child{flex:1.45}#ecbc-boiler-compare .filters input,#ecbc-boiler-compare .filters select{display:block;width:100%;height:41px;margin-top:7px;border:1px solid #c9d4d9;border-radius:4px;background:#fff;color:var(--ink);padding:0 9px;font-size:12px}#ecbc-boiler-compare .reset{border:none;background:transparent;color:var(--muted);font-size:11px;text-decoration:underline;min-height:40px;white-space:nowrap}#ecbc-boiler-compare .results-bar{display:flex;justify-content:space-between;align-items:center;margin:22px 0}#ecbc-boiler-compare .results-bar p{font-size:12px;margin:0}#ecbc-boiler-compare .view-toggle{display:flex;border:1px solid var(--line);padding:3px;border-radius:5px;background:#fff}#ecbc-boiler-compare .view-toggle button{font-size:11px;background:transparent;border:none;color:var(--muted);padding:7px 13px;border-radius:3px}#ecbc-boiler-compare .view-toggle button[aria-pressed=true]{background:var(--wash);color:var(--ink);font-weight:700}#ecbc-boiler-compare .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}#ecbc-boiler-compare .card{border:1px solid var(--line);border-radius:7px;background:#fff;padding:23px;display:flex;flex-direction:column;position:relative}#ecbc-boiler-compare .card.ecbc{border-top:3px solid var(--blue);padding-top:21px}#ecbc-boiler-compare .card-top{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-bottom:18px}#ecbc-boiler-compare .badge{background:var(--wash);color:var(--blue);padding:2px 7px;border-radius:3px;font-size:9px}#ecbc-boiler-compare .card h3{font-size:23px;line-height:1.2;letter-spacing:-.5px;margin:0 0 8px}#ecbc-boiler-compare .card .rating{font-size:12px;color:var(--muted);margin:0 0 20px}#ecbc-boiler-compare .card dl{display:grid;grid-template-columns:1fr 1.6fr;gap:11px;font-size:11px;border-top:1px solid var(--line);padding-top:17px;margin:0}#ecbc-boiler-compare .card dt{color:var(--muted)}#ecbc-boiler-compare .card dd{margin:0;text-align:right}#ecbc-boiler-compare .price{font-size:22px;font-weight:600;margin:23px 0 0}#ecbc-boiler-compare .price small{display:block;font-size:10px;color:var(--muted);font-weight:400;margin-top:2px}#ecbc-boiler-compare .price.pending{font-size:14px}#ecbc-boiler-compare .card .note{font-size:11px;color:var(--muted);line-height:1.7;margin:17px 0 20px;flex:1}#ecbc-boiler-compare .card-bottom{display:flex;gap:15px;align-items:center}#ecbc-boiler-compare .select-btn{background:#fff;border:1px solid var(--ink);color:var(--ink);border-radius:4px;font-size:11px;padding:10px 14px}#ecbc-boiler-compare .select-btn[aria-pressed=true]{background:var(--ink);color:#fff}#ecbc-boiler-compare .sources-link{font-size:10px;color:var(--muted)}#ecbc-boiler-compare .detail{font-size:11px;margin-top:17px}#ecbc-boiler-compare .detail summary{cursor:pointer}#ecbc-boiler-compare .detail p{margin:10px 0}#ecbc-boiler-compare .source-links{display:flex;flex-direction:column;gap:7px;margin-top:12px;font-size:11px}#ecbc-boiler-compare .table-scroll{overflow:auto;border:1px solid var(--line);border-radius:6px;background:#fff}#ecbc-boiler-compare table{border-collapse:collapse;width:100%;font-size:11px;text-align:left}#ecbc-boiler-compare caption{text-align:left;padding:14px;font-size:12px;color:var(--muted)}#ecbc-boiler-compare th,#ecbc-boiler-compare td{padding:15px 13px;border-bottom:1px solid var(--line);vertical-align:top;min-width:120px}#ecbc-boiler-compare thead th{font-size:10px;background:var(--wash);position:sticky;top:0}#ecbc-boiler-compare tbody th{min-width:185px}#ecbc-boiler-compare td small,#ecbc-boiler-compare th small{display:block;color:var(--muted);font-weight:400;margin-top:5px}#ecbc-boiler-compare .table-note{font-size:10px;color:var(--muted);margin:19px 0 0;line-height:1.7}#ecbc-boiler-compare .empty{padding:40px;text-align:center;background:#fff;border:1px dashed 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#ccd9de;padding-top:15px}#ecbc-boiler-compare .honesty{margin-top:35px;border-top:1px solid #ccd9de;padding-top:25px;display:flex;gap:16px;align-items:center}#ecbc-boiler-compare .honesty>span{border:1px solid var(--blue);color:var(--blue);border-radius:50%;width:24px;height:24px;display:grid;place-items:center;flex-shrink:0}#ecbc-boiler-compare .honesty p{margin:0;font-size:12px}#ecbc-boiler-compare .honesty b{color:var(--ink)}#ecbc-boiler-compare .recommend{display:grid;grid-template-columns:1.3fr 1fr;gap:70px;padding:36px;background:#fff;border:1px solid var(--line);border-radius:8px}#ecbc-boiler-compare .recommend p{font-size:13px;color:var(--muted)}#ecbc-boiler-compare .recommend .survey{color:var(--ink);font-weight:600}#ecbc-boiler-compare .recommend-actions{display:flex;flex-direction:column;justify-content:center;gap:13px}#ecbc-boiler-compare .recommend-actions .button{gap:10px;font-size:12px}#ecbc-boiler-compare .recommend-actions small{font-size:10px;color:var(--muted)}#ecbc-boiler-compare .recommend-actions p{font-size:11px}#ecbc-boiler-compare .method{padding-top:0}#ecbc-boiler-compare .method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin:30px 0}#ecbc-boiler-compare .method h3{font-size:15px}#ecbc-boiler-compare .method p{color:var(--muted);font-size:12px}#ecbc-boiler-compare .method>details{border-top:1px solid var(--line);padding:18px 0;font-size:12px}#ecbc-boiler-compare .method summary{cursor:pointer;font-weight:600}#ecbc-boiler-compare .source-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding-top:22px;font-size:11px}#ecbc-boiler-compare footer{background:var(--ink);color:#d7e4ea;padding:35px 0 95px;font-size:11px}#ecbc-boiler-compare footer .wrap{display:flex;justify-content:space-between;gap:25px}#ecbc-boiler-compare footer b{letter-spacing:1px;color:#fff}#ecbc-boiler-compare .tray{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);background:white;border:1px solid var(--line);border-radius:8px;padding:13px 18px;box-shadow:0 8px 35px #15344626;display:flex;align-items:center;gap:24px;z-index:6;width:min(780px,calc(100% - 28px))}#ecbc-boiler-compare .tray>div{flex:1}#ecbc-boiler-compare .tray b{font-size:12px;display:block}#ecbc-boiler-compare .tray span{font-size:10px;color:var(--muted);display:block;max-width:490px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#ecbc-boiler-compare .toast{position:fixed;bottom:110px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;border-radius:6px;padding:12px 18px;font-size:12px;z-index:8;max-width:90%;box-shadow:0 5px 20px #0002}#ecbc-boiler-compare .toast:empty{display:none}@media(max-width:1000px){#ecbc-boiler-compare .wrap{padding-left:25px;padding-right:25px}#ecbc-boiler-compare .header nav{gap:15px;font-size:11px}#ecbc-boiler-compare .hero{gap:35px}#ecbc-boiler-compare .filters{flex-wrap:wrap}#ecbc-boiler-compare .filters label{flex:1 1 25%}#ecbc-boiler-compare .grid{grid-template-columns:repeat(2,1fr)}#ecbc-boiler-compare .tabs{grid-template-columns:repeat(2,1fr)}}@media(max-width:700px){#ecbc-boiler-compare .wrap{padding-left:20px;padding-right:20px}#ecbc-boiler-compare .header{height:75px;gap:10px}#ecbc-boiler-compare .header nav{display:none}#ecbc-boiler-compare .brand img{width:94px;height:43px}#ecbc-boiler-compare .brand span{font-size:9px;padding-left:10px}#ecbc-boiler-compare .header>.button{font-size:10px;padding:9px}#ecbc-boiler-compare .hero{grid-template-columns:1fr;padding-top:38px;padding-bottom:35px;gap:30px}#ecbc-boiler-compare h1{font-size:46px;letter-spacing:-1.7px}#ecbc-boiler-compare .lead{font-size:16px}#ecbc-boiler-compare .hero-panel{padding:24px}#ecbc-boiler-compare .actions{gap:15px;flex-wrap:wrap}#ecbc-boiler-compare .evidence-strip .wrap{display:grid;grid-template-columns:1fr 1fr;gap:12px;font-size:10px}#ecbc-boiler-compare .section{padding-top:40px;padding-bottom:40px}#ecbc-boiler-compare h2{font-size:28px}#ecbc-boiler-compare .section-heading{display:block}#ecbc-boiler-compare .section-heading>p{margin-top:16px;max-width:100%}#ecbc-boiler-compare .tabs{gap:7px}#ecbc-boiler-compare .tabs button{padding:14px 11px;font-size:11px}#ecbc-boiler-compare .tabs button small{font-size:9px}#ecbc-boiler-compare .filters{gap:10px}#ecbc-boiler-compare .filters label{flex:1 1 43%}#ecbc-boiler-compare .filters label:first-child{flex:1 1 100%}#ecbc-boiler-compare .grid{grid-template-columns:1fr}#ecbc-boiler-compare .card{padding:23px}#ecbc-boiler-compare .guide-grid,#ecbc-boiler-compare .method-grid,#ecbc-boiler-compare .recommend{grid-template-columns:1fr;gap:22px}#ecbc-boiler-compare .guide-grid{margin-top:25px}#ecbc-boiler-compare .recommend{padding:24px}#ecbc-boiler-compare .recommend h2{font-size:26px}#ecbc-boiler-compare .source-list{grid-template-columns:1fr}#ecbc-boiler-compare .tray{gap:10px;padding:12px}#ecbc-boiler-compare .tray span{max-width:150px}#ecbc-boiler-compare .tray .button{font-size:10px;padding:10px}#ecbc-boiler-compare .tray .reset{font-size:10px}#ecbc-boiler-compare footer .wrap{flex-direction:column;gap:10px}#ecbc-boiler-compare .toast{bottom:100px}#ecbc-boiler-compare .compare-section{padding-bottom:40px}}@media(prefers-reduced-motion:reduce){#ecbc-boiler-compare{scroll-behavior:auto}#ecbc-boiler-compare *{transition:none!important}}#ecbc-boiler-compare .boiler-photo{margin:0 0 22px;background:#f7f9f9;border:1px solid #edf0f1;border-radius:5px;padding:15px 12px 8px;text-align:center}#ecbc-boiler-compare .boiler-photo img{display:block;width:100%;height:210px;object-fit:contain;background:white;border-radius:3px}#ecbc-boiler-compare .boiler-photo figcaption{margin-top:8px;font-size:9px;color:var(--muted);line-height:1.3}@media(max-width:700px){#ecbc-boiler-compare .boiler-photo img{height:230px}}#ecbc-boiler-compare .tabs{grid-template-columns:repeat(5,1fr)}@media(max-width:1000px){#ecbc-boiler-compare .tabs{grid-template-columns:repeat(2,1fr)}}#ecbc-boiler-compare .card-guide{font-size:11px;color:var(--blue);margin-top:17px}#ecbc-boiler-compare .guide-prompt{display:flex;align-items:center;gap:40px;justify-content:space-between;padding-top:25px;padding-bottom:50px}#ecbc-boiler-compare .guide-prompt h2{font-size:26px;margin:0 0 12px}#ecbc-boiler-compare .guide-prompt p{font-size:13px;color:var(--muted);max-width:700px}#ecbc-boiler-compare .guide-prompt>.button{white-space:nowrap}@media(max-width:700px){#ecbc-boiler-compare .guide-prompt{display:block}#ecbc-boiler-compare .guide-prompt>.button{margin-top:10px}#ecbc-boiler-compare .filters label:first-child{flex:1 1 100%}}@media(min-width:701px) and (max-width:1000px){#ecbc-boiler-compare .filters label:first-child{flex:1 1 100%}}#ecbc-boiler-compare .brand .ecbc-logo{width:66px;height:80px;object-fit:contain;flex-shrink:0}#ecbc-boiler-compare .footer-logo{display:block;width:58px;height:70px;object-fit:contain;margin-bottom:13px}#ecbc-boiler-compare .button{background:var(--blue);border-color:var(--blue);color:var(--ink)}#ecbc-boiler-compare .button:hover{background:var(--yellow);border-color:var(--yellow);color:var(--ink)}#ecbc-boiler-compare .button.secondary{background:transparent;border-color:var(--ink);color:var(--ink)}#ecbc-boiler-compare .button.secondary:hover{background:var(--yellow);border-color:var(--yellow)}#ecbc-boiler-compare h1 span,#ecbc-boiler-compare .guide-hero h1 span{color:var(--ink);text-decoration:underline;text-decoration-color:var(--blue);text-decoration-thickness:4px;text-underline-offset:8px}#ecbc-boiler-compare .eyebrow,#ecbc-boiler-compare .tabs button span,#ecbc-boiler-compare .badge,#ecbc-boiler-compare .card-guide,#ecbc-boiler-compare .guide-number{color:var(--ink)}#ecbc-boiler-compare .badge{border-left:3px solid var(--accent)}#ecbc-boiler-compare .tabs button[aria-pressed=true] span{color:var(--accent)}#ecbc-boiler-compare .evidence-strip{border-bottom:3px solid var(--yellow)}#ecbc-boiler-compare .hero-panel .panel-top{color:var(--blue)}#ecbc-boiler-compare .hero-panel .number{color:var(--yellow)}#ecbc-boiler-compare .honesty>span{background:var(--yellow);color:var(--ink);border-color:var(--yellow)}#ecbc-boiler-compare .card-guide{ text-decoration-color:var(--blue);text-decoration-thickness:2px}#ecbc-boiler-compare .textlink{border-bottom-color:var(--blue)}#ecbc-boiler-compare .select-btn[aria-pressed=true]{background:var(--accent);color:var(--ink);border-color:var(--accent)}#ecbc-boiler-compare .view-toggle button[aria-pressed=true]{box-shadow:inset 0 -2px 0 var(--blue)}@media(max-width:700px){#ecbc-boiler-compare .brand .ecbc-logo{width:48px;height:60px}#ecbc-boiler-compare .brand{gap:10px}#ecbc-boiler-compare .brand>span{font-size:9px}}

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