:root{--ink:#10243d;--muted:#64748b;--line:#dce4ec;--blue:#246bfe;--pale:#eff6ff;--cream:#fcfcf9}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font-family:"DM Sans",sans-serif}.shell{width:min(1160px,calc(100% - 44px));margin:auto}.nav{height:94px;display:flex;justify-content:space-between;align-items:center}.brand{color:var(--ink);font:800 22px Manrope,sans-serif;text-decoration:none;letter-spacing:-1px}.brand-mark{display:inline-grid;place-items:center;width:27px;height:27px;margin-right:7px;border-radius:9px;background:var(--blue);color:#fff;font-size:16px;vertical-align:2px}.nav-help{font-size:14px;font-weight:600;color:var(--ink);text-decoration:none}.nav-help span{color:var(--blue);margin-left:3px}.hero{padding:65px 0 76px}.eyebrow,.section-kicker,.step-label{font-size:11px;letter-spacing:1.7px;font-weight:700;color:var(--blue)}.eyebrow span{display:inline-block;width:7px;height:7px;border-radius:50%;background:#ffb34c;margin-right:9px}.hero h1,.how h2{font:800 clamp(43px,6vw,72px)/1.06 Manrope,sans-serif;letter-spacing:-3.2px;margin:20px 0}.hero-copy{max-width:525px;color:var(--muted);font-size:18px;line-height:1.58}.trust{display:flex;align-items:center;gap:11px;font-size:13px;margin-top:30px;color:#52647a}.avatars{display:flex}.avatars i{display:grid;place-items:center;width:27px;height:27px;margin-right:-7px;border:2px solid var(--cream);border-radius:50%;font:bold 10px sans-serif;color:#fff;background:#d59a77}.avatars i:nth-child(2){background:#7695b8}.avatars i:nth-child(3){background:#89a57c}.calculator-shell{display:grid;grid-template-columns:1.13fr .87fr;margin-bottom:130px;box-shadow:0 20px 55px #243b5b13;border-radius:20px;background:#fff;overflow:hidden}.calculator{padding:48px 52px 35px}.progress{display:flex;gap:7px;margin-bottom:31px}.progress span{height:4px;border-radius:10px;background:#e4eaf0;flex:1}.progress .active{background:var(--blue)}.form-heading h2{font:800 29px/1.2 Manrope,sans-serif;letter-spacing:-1.2px;margin:7px 0}.form-heading p:not(.step-label){margin:0;color:var(--muted);font-size:15px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:25px 22px;margin:35px 0}.field>span,.sun-field legend{display:block;font-size:13px;font-weight:700;margin-bottom:9px}select,input{font:inherit;color:var(--ink)}select,.input-unit,.counter{height:48px;border:1px solid var(--line);border-radius:8px;background:#fff}select{width:100%;padding:0 13px;appearance:auto}.input-unit{display:flex;align-items:center;padding-left:14px}.input-unit input{width:100%;border:0;outline:0;font-size:15px}.input-unit b{padding:0 13px;color:var(--muted);font-size:13px}.range-row{height:48px;border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;padding:0 12px;gap:10px}.range-row input{accent-color:var(--blue);width:100%}.range-row output{font-size:13px;font-weight:700;white-space:nowrap}.counter{display:flex;justify-content:space-between;align-items:center;padding:3px}.counter-btn{width:38px;height:38px;border:0;border-radius:6px;background:#f3f6f8;color:var(--ink);font-size:21px;cursor:pointer}.counter output{font-size:15px;font-weight:700}.sun-field{border:0;padding:0;margin:0}.choices{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.choices input{position:absolute;opacity:0}.choices label span{height:94px;border:1px solid var(--line);border-radius:9px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:#8ca0b4;cursor:pointer;font-size:19px;transition:.2s}.choices b{font-size:13px;color:var(--ink)}.choices small{font-size:10px;color:var(--muted)}.choices input:checked+span{border:2px solid var(--blue);background:#f5f8ff;color:var(--blue);box-shadow:0 4px 12px #246bfe14}.calculate{width:100%;border:0;border-radius:8px;padding:16px 18px;background:var(--blue);color:#fff;font:700 15px "DM Sans";margin-top:32px;cursor:pointer;box-shadow:0 8px 18px #246bfe37}.calculate span{float:right;font-size:19px;line-height:14px}.privacy{text-align:center;color:#98a6b4;font-size:11px;margin:16px 0 0}.result-card{position:relative;overflow:hidden;background:#102d54;color:#fff;padding:47px 45px}.result-card:after{content:"";position:absolute;width:340px;height:340px;right:-175px;top:-140px;border:1px solid #ffffff2e;border-radius:50%;box-shadow:0 0 0 37px #ffffff09,0 0 0 75px #ffffff07}.result-top{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1}.result-icon{display:grid;place-items:center;width:37px;height:37px;border-radius:10px;background:#ffffff17;font-size:20px}.pill{font-size:9px;letter-spacing:1px;color:#9dbfff}.result-overline{font-size:10px;font-weight:700;letter-spacing:1.3px;color:#a9c4e5;margin:49px 0 8px}.result-number{display:flex;align-items:baseline;gap:8px}.result-number strong{font:800 56px/1 Manrope,sans-serif;letter-spacing:-3px}.result-number span{font-size:15px;color:#c2d3e8}.result-btu{color:#b3c9e2;font-size:13px;margin:9px 0 31px}.result-btu b{color:#fff}.recommendation{border-top:1px solid #ffffff2b;border-bottom:1px solid #ffffff2b;padding:18px 0}.recommendation>span{font-size:9px;letter-spacing:1.2px;color:#98bee7}.recommendation h3{font:700 20px Manrope,sans-serif;letter-spacing:-.7px;margin:5px 0}.recommendation p{font-size:12px;color:#bdd0e4;line-height:1.5;margin:0}.energy{display:flex;gap:11px;padding:20px 0}.leaf{font-size:23px;color:#9fd4a1}.energy p{font-size:12px;line-height:1.45;margin:0;color:#bdd0e4}.energy b{color:#fff}.outline{width:100%;color:#fff;background:transparent;border:1px solid #7a9abb;border-radius:7px;padding:12px;font:600 13px "DM Sans";cursor:pointer}.outline span{float:right}.disclaimer{font-size:10px;line-height:1.4;color:#91abc7;margin-top:16px}.how{display:flex;justify-content:space-between;gap:70px;padding-bottom:125px}.how h2{font-size:37px;letter-spacing:-2px;margin:14px 0}.how-list{width:470px;position:relative}.how-list article{display:flex;gap:20px;margin:0 0 28px}.how-list i{font:800 14px Manrope,sans-serif;color:var(--blue);font-style:normal}.how-list h3{margin:0 0 5px;font:700 16px Manrope,sans-serif}.how-list p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}.snow{position:absolute;right:0;bottom:-20px;color:#7ba7ff;font-size:27px}footer{border-top:1px solid var(--line);padding:29px 0 40px;display:flex;align-items:center;gap:25px;color:var(--muted);font-size:12px}footer .brand{font-size:17px}footer .brand-mark{width:22px;height:22px;font-size:13px;border-radius:7px}footer span:last-child{margin-left:auto}@media(max-width:800px){.calculator-shell{grid-template-columns:1fr}.result-card{order:-1;padding:34px}.calculator{padding:35px 27px}.hero{padding:35px 0 55px}.hero h1{font-size:48px}.how{display:block;padding-bottom:70px}.how-list{width:auto;margin-top:40px}.result-overline{margin-top:34px}.result-number strong{font-size:48px}}@media(max-width:480px){.shell{width:min(100% - 30px,1160px)}.nav{height:76px}.nav-help{font-size:12px}.hero h1{font-size:39px;letter-spacing:-2.4px}.hero-copy{font-size:16px}.fields{grid-template-columns:1fr;gap:18px;margin:29px 0}.choices label span{height:82px}.result-card{padding:29px 24px}.result-number strong{font-size:42px}.how h2{font-size:29px}.how-list article{gap:14px}footer{gap:12px;flex-wrap:wrap}}