*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--font);padding-bottom:0}h1,h2,h3,p,figure{margin:0}h1,h2,h3{line-height:1.05;letter-spacing:-.04em;text-wrap:balance;font-weight:500}h1{font-size:clamp(48px,6.7vw,96px)}h2{font-size:clamp(36px,4vw,58px)}h3{font-size:28px}p{max-width:65ch;text-wrap:pretty}p+p{margin-top:20px}a{color:inherit;text-underline-offset:5px}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.4;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}img{width:100%;height:auto;display:block;object-fit:cover;outline:1px solid #00000012;outline-offset:-1px}.wrap{max-width:calc(var(--wrap) + 2*var(--edge));padding-inline:var(--edge);margin:0 auto}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:80px;align-items:center}.section-head{display:flex;justify-content:space-between;align-items:end;gap:40px;margin-bottom:48px}.section-head p{max-width:340px}.button{display:inline-flex;justify-content:center;align-items:center;min-height:52px;padding:12px 24px;border:1px solid var(--accent);border-radius:var(--radius);background:var(--ink);color:var(--paper);text-decoration:none;font-weight:500;line-height:1.3;text-align:center;max-width:100%}.small,.fine{font-size:13px;line-height:1.6;color:var(--muted)}header{height:104px;padding:0 var(--edge);display:flex;align-items:center;justify-content:space-between;gap:32px;border-bottom:1px solid var(--line);background:var(--paper);position:relative;z-index:10}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;font-size:23px;line-height:1.1;font-weight:600;max-width:340px;overflow-wrap:anywhere}.brand small{display:block;font-size:12px;font-weight:400;letter-spacing:.04em;margin-top:5px}.brand svg{width:40px;min-width:40px;fill:none;stroke:var(--accent);stroke-width:1.8}nav{display:flex;gap:28px}nav a{text-decoration:none;font-size:14px;white-space:nowrap}nav a[aria-current]{text-decoration:underline}.header-call{font-size:15px;white-space:nowrap}.menu,.phone-bar{display:none}.skip{position:fixed;left:24px;top:-80px;background:var(--paper);z-index:50;padding:16px}.skip:focus{top:12px}footer{padding:64px var(--edge) 28px;display:grid;grid-template-columns:1fr 1fr;gap:32px;border-top:1px solid var(--line)}.footer-brand{font-size:25px;text-decoration:none}.fine{grid-column:1/-1;display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);padding-top:24px}footer p{margin-top:16px;font-size:14px}label{display:block;margin:24px 0}input:not([type=range]),textarea{width:100%;padding:14px;border:1px solid var(--muted);background:var(--paper);border-radius:4px;margin-top:8px;color:var(--ink)}input[type=range]{width:100%;accent-color:var(--accent);min-height:44px}summary{cursor:pointer;min-height:48px} [hidden]{display:none!important} @media(hover:hover) and (pointer:fine){.button:hover{background:var(--accent)}nav a:hover{color:var(--accent)}button:hover{filter:brightness(.94)}}
@media(max-width:1000px){:root{--edge:32px;--space:80px}.split{gap:40px}header{gap:20px}nav{gap:16px}.header-call{display:none}.fine{flex-wrap:wrap}}
@media(max-width:650px){:root{--edge:24px;--space:64px}body{padding-bottom:72px}header{height:80px}.brand{font-size:21px;max-width:260px}.brand svg{width:32px;min-width:32px}.menu{display:block;border:1px solid var(--line);border-radius:4px;padding:10px;background:transparent;min-height:44px}nav{display:none;position:absolute;left:0;right:0;top:80px;background:var(--paper);padding:24px;border-bottom:1px solid var(--line)}nav.open{display:flex;flex-direction:column;gap:8px}nav a{padding:12px}.split{grid-template-columns:minmax(0,1fr);gap:32px}.section-head{display:block;margin-bottom:32px}.section-head p{margin-top:20px}.phone-bar{display:flex;justify-content:space-between;align-items:center;position:fixed;bottom:0;left:0;right:0;padding:16px 24px max(16px,env(safe-area-inset-bottom));background:var(--ink);color:var(--paper);z-index:30;text-decoration:none;font-size:14px;min-height:60px}footer{grid-template-columns:1fr;padding-top:48px}.fine{grid-column:1;flex-direction:column}h3{font-size:26px}h1{font-size:52px}h2{font-size:38px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}@media(prefers-contrast:more){:root{--muted:#274b49;--line:#79938f}} 
.demo-note{padding:16px var(--edge);background:var(--surface);max-width:none}.worst [data-sig="hvac-thermal"]{height:auto}.worst [data-sig="hvac-thermal"] .stage{position:relative;height:auto;min-height:980px}.worst [data-sig="hvac-thermal"] .hero-copy h1{font-size:clamp(36px,5vw,64px)}.worst [data-sig="hvac-thermal"] .house{top:50%}.worst header{height:auto;min-height:104px;flex-wrap:wrap;padding-block:16px}.worst .brand{font-size:18px}.worst h1{overflow-wrap:anywhere}@media(max-width:650px){.worst header{flex-wrap:nowrap;min-height:80px}.worst .brand{max-width:240px}.worst [data-sig="hvac-thermal"] .hero-copy{display:block}.worst [data-sig="hvac-thermal"] .reading{top:420px}.worst [data-sig="hvac-thermal"] .house{top:56%}}
.brand small>span{display:inline}header .brand>span{min-width:0}.phone-bar>span{display:inline}