:root{--navy:#052c4d;--navy2:#031f37;--blue:#0878bb;--orange:#ff681d;--green:#08ae59;--ink:#0e2a42;--muted:#5c7080;--line:#d8e4ec;--soft:#f2f7fa;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);line-height:1.55;background:#fff}a{color:inherit}.wrap{width:min(1180px,94%);margin:auto}
.top{background:#fff}.top .wrap{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:25px}.logo{width:245px;height:auto}.tag{font-weight:700;color:var(--navy);font-size:.92rem}.contact-head{display:flex;gap:25px;align-items:center}.contact-head a{text-decoration:none;font-weight:900;color:var(--navy)}.small{display:block;font-size:.72rem;font-weight:600;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:8px;background:var(--orange);color:#fff!important;padding:13px 19px;text-decoration:none;font-weight:900;cursor:pointer}.btn.green{background:var(--green)}.btn.navy{background:var(--navy)}.btn.white{background:#fff;color:var(--navy)!important}
header{background:var(--navy);color:#fff;position:sticky;top:0;z-index:20}.nav{min-height:46px;display:flex;align-items:center;justify-content:space-between}.links{display:flex;gap:34px}.links a{text-decoration:none;font-weight:700;font-size:.92rem}.brandline{height:3px;background:linear-gradient(90deg,var(--orange),var(--orange) 22%,var(--blue) 22%,var(--blue) 72%,var(--green) 72%)}
.hero{background:linear-gradient(90deg,#062a48 0%,#062a48 50%,#edf2f4 50%);color:#fff}.hero-grid{display:grid;grid-template-columns:1fr 1fr;min-height:410px}.hero-copy{padding:48px 45px 48px 0}.kicker{font-size:.78rem;font-weight:900;letter-spacing:.22em;text-transform:uppercase}.hero h1{font-size:clamp(2.7rem,5.2vw,4.45rem);line-height:1.02;letter-spacing:-.035em;margin:10px 0 13px}.hero p{font-size:1.08rem;color:#e1ebf1;max-width:620px}.checks{display:flex;flex-wrap:wrap;gap:17px;margin:22px 0;font-size:.86rem;font-weight:800}.checks span:before{content:"✓";background:var(--orange);border-radius:50%;display:inline-grid;place-items:center;width:20px;height:20px;margin-right:7px}.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:22px}
.boiler{position:relative;overflow:hidden;background:linear-gradient(135deg,#e5e9ea,#fafafa);display:grid;place-items:center}.pipes{position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0 46px,rgba(180,91,36,.16) 47px 51px,transparent 52px 86px);opacity:.7}.unit{position:relative;width:57%;height:69%;background:linear-gradient(145deg,#fff,#e9edef);border-radius:7px;box-shadow:0 20px 45px rgba(0,0,0,.17);border:1px solid #d5dadd}.unit:after{content:"BOILER";position:absolute;top:27%;left:50%;transform:translateX(-50%);font-weight:900;color:#55706f;letter-spacing:.12em}.display{position:absolute;bottom:18%;left:50%;transform:translateX(-50%);width:38%;height:18%;border:1px solid #b9c1c5;border-radius:5px;background:#f6f8f8}.boiler-note{position:absolute;right:18px;bottom:18px;background:var(--navy);color:#fff;padding:12px 15px;border-radius:8px;font-size:.83rem;font-weight:800}
.services{padding:17px 0;background:#fff}.service-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.service{background:linear-gradient(#f7fafc,#eaf3f8);border-radius:8px;text-align:center;padding:17px 10px;min-height:132px;border:1px solid #e2ebf0;text-decoration:none}.service .ico{font-size:2rem;color:var(--navy);font-weight:900}.service strong{display:block;margin-top:8px;line-height:1.2;font-size:.9rem}
section.content-section{padding:26px 0}.three{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:15px}.panel{min-height:290px;border:1px solid var(--line);border-radius:4px;overflow:hidden;background:#fff}.coverage{padding:22px}.coverage h2,.feature h2{margin:0;color:var(--navy);font-size:1.55rem;line-height:1.1}.coverage ul{list-style:none;padding:8px 0 0;margin:0}.coverage li{padding:5px 0;font-weight:800}.coverage li:before{content:"●";color:var(--orange);margin-right:10px}.mapbox{margin-top:10px;display:grid;grid-template-columns:1fr 1fr;gap:5px;transform:rotate(-2deg)}.borough{background:#dcecf6;padding:14px 7px;text-align:center;font-size:.76rem;font-weight:900;color:var(--navy);border:2px solid #fff;border-radius:14px}.feature{position:relative;background:linear-gradient(#eef4f5,#dfe7e8);display:flex;align-items:flex-end}.feature.hot{background:linear-gradient(135deg,#eceff0,#fff)}.feature-card{background:var(--navy);color:#fff;margin:0 12px 12px;padding:18px;width:calc(100% - 24px)}.feature-card h2{color:#fff}.feature-card p{font-size:.87rem;margin-bottom:0}.radiator{position:absolute;top:32px;left:18%;right:18%;height:105px;background:repeating-linear-gradient(90deg,#f9f9f9 0 12px,#ccd4d7 13px 15px);border:1px solid #bdc7ca}.cylinder{position:absolute;top:20px;left:35%;width:30%;height:145px;background:linear-gradient(90deg,#e5e9ea,#fff,#dfe5e6);border-radius:50px 50px 10px 10px;border:1px solid #c8d0d2}
.process{background:#f4f8fa;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.process .wrap{display:grid;grid-template-columns:repeat(3,1fr) auto;align-items:center}.step{padding:18px;border-right:1px solid var(--line)}.step strong{display:block;color:var(--navy)}.step span{font-size:.82rem;color:var(--muted)}
.pagehero{padding:55px 0;background:linear-gradient(120deg,#eaf5fa,#fff)}.pagehero h1{font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.05;color:var(--navy);margin:8px 0}.maincontent{padding:60px 0}.contentgrid{display:grid;grid-template-columns:1fr 330px;gap:48px}.side{border:1px solid var(--line);border-radius:10px;padding:24px;height:max-content}.side h3{color:var(--navy);margin-top:0}form{display:grid;gap:14px}label{font-weight:800;color:var(--navy)}input,select,textarea{padding:13px;border:1px solid #b9cad5;border-radius:7px;font:inherit;width:100%}textarea{min-height:140px}.note{font-size:.86rem;color:var(--muted)}
footer{background:var(--navy);color:#d8e4ec;padding:22px 0 85px}.footer{display:grid;grid-template-columns:1fr 1fr 1fr;gap:25px;font-size:.86rem}.footer strong{color:#fff}.footer a{color:#fff}.mobilebar{display:none}
@media(max-width:900px){.tag{display:none}.contact-head>a:not(.btn){display:none}.links{gap:22px}.links a{display:block;font-size:.88rem;white-space:nowrap}.hero{background:#062a48}.hero-grid,.three,.contentgrid{grid-template-columns:1fr}.boiler{min-height:360px}.hero-copy{padding-right:0}.service-grid{grid-template-columns:repeat(2,1fr)}.service:last-child{grid-column:1/-1}.process .wrap{grid-template-columns:1fr}.step{border-right:0;border-bottom:1px solid var(--line)}.process .btn{margin:15px}.footer{grid-template-columns:1fr}.mobilebar{display:grid;position:fixed;bottom:0;left:0;right:0;z-index:30;grid-template-columns:repeat(3,1fr);background:#fff;border-top:1px solid var(--line)}.mobilebar a{text-align:center;text-decoration:none;padding:13px 4px;font-weight:900;color:var(--navy)}}
@media(max-width:520px){.top .wrap{min-height:72px}.logo{width:185px}.contact-head .btn{padding:10px;font-size:.8rem}.hero h1{font-size:2.55rem}.service-grid{grid-template-columns:1fr 1fr}}

.heating-duo{display:grid;grid-template-columns:1fr 1fr;gap:24px}.heat-card{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}.heat-copy{padding:24px}.heat-copy h2{margin-top:0;color:var(--navy)}.heat-visual{height:285px;position:relative;overflow:hidden;background:#eef2f3}.radiator-photo{background:linear-gradient(135deg,#e7e4df,#fbfbfa)}.photo-radiator{position:absolute;left:17%;right:17%;top:24%;height:48%;border:2px solid #c4c9ca;background:repeating-linear-gradient(90deg,#fff 0 14px,#d7dcdd 15px 17px);box-shadow:0 15px 24px rgba(0,0,0,.12)}.photo-radiator:before,.photo-radiator:after{content:"";position:absolute;bottom:-24px;width:7px;height:24px;background:#b1b8ba}.photo-radiator:before{left:12%}.photo-radiator:after{right:12%}.ufh-photo{background:linear-gradient(#e8e3dc,#cfc9c1)}.ufh-lines{position:absolute;inset:10%;border:8px solid #b85d37;border-radius:50px;background:repeating-radial-gradient(ellipse at center,transparent 0 20px,rgba(184,93,55,.55) 21px 25px,transparent 26px 39px)}.quote-strip{margin-top:28px;padding:25px;background:var(--navy);color:#fff;border-radius:10px;display:flex;align-items:center;justify-content:space-between;gap:25px}.quote-strip h2{margin:0}.quote-strip p{margin:5px 0 0}@media(max-width:800px){.heating-duo{grid-template-columns:1fr}.quote-strip{display:block}.quote-strip .actions{margin-top:18px}}

@media(max-width:520px){.nav{justify-content:center;overflow-x:auto}.links{width:100%;justify-content:space-around;gap:8px}.links a{font-size:.82rem;padding:14px 2px}}


/* Mobile navigation and layout corrections */
.menu-toggle{display:none;background:transparent;border:0;padding:10px 4px;cursor:pointer}
.menu-toggle span{display:block;width:27px;height:3px;background:#fff;margin:5px 0;border-radius:2px}
@media(max-width:900px){
  header{position:sticky;top:0}
  .nav{min-height:54px;position:relative;justify-content:flex-start;overflow:visible}
  .menu-toggle{display:block}
  .links{display:none;position:absolute;top:54px;left:0;right:0;width:100%;background:var(--navy);padding:7px 3%;box-shadow:0 8px 18px rgba(0,0,0,.18);z-index:50}
  .links.open{display:grid;grid-template-columns:1fr}
  .links a{padding:13px 10px;border-bottom:1px solid rgba(255,255,255,.14);font-size:.95rem}
  .links a:last-child{border-bottom:0}
  .service-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .service:last-child{grid-column:auto}
  .service{min-height:145px;display:flex;flex-direction:column;justify-content:center}
  .feature{min-height:390px;padding-top:175px;align-items:flex-end}
  .feature-card{position:relative;z-index:2;margin-top:auto}
  .radiator{top:38px;height:115px}
  .cylinder{top:28px;left:36%;width:28%;height:130px;border-radius:55px 55px 12px 12px}
}
@media(max-width:520px){
  .nav{justify-content:flex-start;overflow:visible}
  .service-grid{grid-template-columns:1fr 1fr;gap:12px}
  .service strong{font-size:.86rem}
  .feature{min-height:365px;padding-top:165px}
  .feature-card{margin:0 12px 12px;padding:18px}
  .feature-card h2{font-size:1.55rem}
  .cylinder{top:25px;left:35%;width:30%;height:125px}
}