@font-face{font-family:'Barlow';font-weight:400;font-display:swap;src:url(/fonts/barlow-latin-400-normal.woff2) format('woff2')}
@font-face{font-family:'Barlow';font-weight:600;font-display:swap;src:url(/fonts/barlow-latin-600-normal.woff2) format('woff2')}
@font-face{font-family:'Barlow Condensed';font-weight:600;font-style:normal;font-display:swap;src:url(/fonts/barlow-condensed-latin-600-normal.woff2) format('woff2')}
@font-face{font-family:'Barlow Condensed';font-weight:700;font-style:normal;font-display:swap;src:url(/fonts/barlow-condensed-latin-700-normal.woff2) format('woff2')}
@font-face{font-family:'Barlow Condensed';font-weight:800;font-style:italic;font-display:swap;src:url(/fonts/barlow-condensed-latin-800-italic.woff2) format('woff2')}
:root{--bg:#131313;--bg2:#0c0c0c;--panel:#1b1b1b;--line:#cfc9b8;--dim:#8d8878;--white:#f4f1e8;--yellow:#ffc72c;--red:#e5372c;--acc:#ffc72c}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;color:var(--white);font:18px/1.6 'Barlow',system-ui,sans-serif;overflow-x:hidden;background-color:var(--bg);
 background-image:linear-gradient(#ffffff0d 1px,transparent 1px),linear-gradient(90deg,#ffffff0d 1px,transparent 1px);background-size:120px 120px;background-attachment:fixed}
a{color:inherit}
h1,h2,h3{font-family:'Barlow Condensed',sans-serif;font-weight:800;font-style:italic;text-transform:uppercase;margin:0;line-height:.95;letter-spacing:.01em}
.mono{font-family:'Barlow Condensed',sans-serif}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-999px;top:0;background:var(--yellow);color:#111;padding:10px 14px;z-index:100}
.skip:focus{left:8px;top:8px}

/* header */
.tb{border-bottom:2px solid var(--yellow);background:var(--bg2);position:sticky;top:0;z-index:50}
.tb .wrap{display:grid;grid-template-columns:auto 1fr auto;align-items:stretch}
.brand{padding:14px 26px 14px 0;border-right:1px solid #ffffff22;display:flex;align-items:center;gap:12px;text-decoration:none;font:italic 800 29px/1 'Barlow Condensed',sans-serif;text-transform:uppercase;letter-spacing:.03em}
.brand img{height:34px;width:auto}
.brand b{color:var(--yellow);font-weight:800}
.meta{display:flex;align-items:center;font:600 13px/1.3 'Barlow Condensed',monospace;color:var(--dim);text-transform:uppercase;letter-spacing:.1em;overflow:hidden}
.meta span{padding:0 22px;border-right:1px solid #ffffff18;white-space:nowrap}
.meta b{display:block;color:var(--white);font-weight:500;font-size:12px}
.call{display:flex;align-items:center;padding:0 0 0 26px;border-left:1px solid #ffffff22}
.callbtn{display:inline-block;background:var(--yellow);color:#111;text-decoration:none;font:italic 800 21px/1 'Barlow Condensed',sans-serif;letter-spacing:.05em;text-transform:uppercase;padding:12px 20px;white-space:nowrap;transition:transform .2s,box-shadow .2s;box-shadow:4px 4px 0 #ffffff33}
.callbtn:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 #ffffff44}
@media(max-width:900px){.meta{display:none}.tb .wrap{grid-template-columns:1fr auto}.brand{border:0}}
@media(max-width:480px){.brand{font-size:22px}.callbtn{font-size:17px;padding:10px 12px}.call{padding-left:10px;border:0}}

/* hero */
.hero{position:relative;padding:76px 0 90px;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse at 78% 45%,var(--tint,#0000),#0000 60%);transition:background .6s}
.hero[data-mode="cool"]{--acc:#3da5ff;--tint:#3da5ff33}
.hero[data-mode="heat"]{--acc:var(--red);--tint:#e5372c33}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative}
.tag{font:600 15px 'Barlow Condensed',monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--acc);margin:0 0 20px;display:flex;align-items:center;gap:10px;transition:color .4s}
.tag:before{content:"";width:30px;height:2px;background:currentColor}
.hero h1{font-size:clamp(54px,7.4vw,108px)}
.hero h1 span{display:block;color:transparent;-webkit-text-stroke:2px var(--acc);transition:-webkit-text-stroke-color .4s}
.lede{font-size:19px;color:#d8d3c4;max-width:520px;margin:26px 0 28px}
.btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;font:italic 800 22px/1 'Barlow Condensed',sans-serif;letter-spacing:.06em;text-transform:uppercase;text-decoration:none;padding:16px 26px;transition:transform .2s,background .2s;border:0;cursor:pointer}
.btn.y{background:var(--yellow);color:#111;box-shadow:5px 5px 0 #ffffff33}
.btn.y:hover{transform:translate(-2px,-2px)}
.btn.o{border:2px solid var(--line);color:#fff;background:none}.btn.o:hover{background:#ffffff14}
.creds{list-style:none;padding:0;margin:34px 0 0;display:grid;grid-template-columns:repeat(2,auto);gap:10px 28px;justify-content:start;font:600 15px 'Barlow Condensed',monospace;letter-spacing:.06em;text-transform:uppercase;color:#cfc9b8}
.creds li{display:flex;align-items:center;gap:9px}
.creds li:before{content:"";width:12px;height:12px;border:2px solid var(--yellow);transform:rotate(45deg)}

/* dial figure */
.fig{position:relative;margin:0 auto;max-width:460px;width:100%}
.frame{position:relative;padding:26px 26px 22px;background:#ffffff08;border:1px solid #ffffff2a}
.c{position:absolute;width:26px;height:26px;border:3px solid var(--yellow)}
.c.tl{top:-7px;left:-7px;border-right:0;border-bottom:0}.c.tr{top:-7px;right:-7px;border-left:0;border-bottom:0}
.c.bl{bottom:-7px;left:-7px;border-right:0;border-top:0}.c.br{bottom:-7px;right:-7px;border-left:0;border-top:0}
.fig figcaption{margin:14px 2px 0;font:600 14px 'Barlow Condensed',monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.fig figcaption b{color:var(--white);font-weight:500}
.dial{width:100%;max-width:340px;margin:0 auto;touch-action:none;user-select:none}
.dial svg{display:block;width:100%;height:auto;cursor:grab;overflow:visible}
.dial svg:active{cursor:grabbing}
.dial .tr{fill:none;stroke:#ffffff1f;stroke-width:12;stroke-linecap:round}
.dial .va{fill:none;stroke:var(--acc);stroke-width:12;stroke-linecap:round;transition:stroke .4s}
.dial .kn{fill:#fff;stroke:var(--acc);stroke-width:5;filter:drop-shadow(0 3px 6px #0008)}
.dial text{font-family:'Barlow Condensed',sans-serif;font-style:italic;text-anchor:middle;fill:#fff}
.dial .mode{font:600 13px 'Barlow Condensed',monospace;letter-spacing:.16em;fill:var(--acc);text-transform:uppercase;transition:fill .4s}
.dial:focus-within{outline:2px solid var(--yellow);outline-offset:6px}
.hint{margin:16px 0 0;font:600 15px/1.5 'Barlow Condensed',monospace;color:var(--dim);letter-spacing:.03em;text-align:center}
.hint b{color:var(--acc);font-weight:500;transition:color .4s}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr;gap:44px}.hero{padding-bottom:70px}}
@media(max-width:480px){.creds{grid-template-columns:1fr}.frame{padding:20px 14px 16px}}

/* sections */
.sec{padding:100px 0;position:relative}
.sec.dark{background:linear-gradient(180deg,#0000,#0a0a0acc 12%,#0a0a0acc 88%,#0000)}
.hd{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:42px}
.hd h2{font-size:clamp(46px,7vw,92px)}
.hd p{margin:0;color:#cfc9b8;max-width:380px}
.num{font:600 15px 'Barlow Condensed',monospace;letter-spacing:.16em;color:var(--yellow);text-transform:uppercase;margin:0 0 12px;display:block}

/* diagram */
.diag{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.pipes{width:100%;height:auto;display:block;overflow:visible}
.pipe-w{fill:none;stroke:#ffffff1c;stroke-width:16;stroke-linecap:round}
.pipe{fill:none;stroke:var(--line);stroke-width:3;stroke-linecap:round}
.js .pipe{transition:stroke-dashoffset 1.4s ease}
.valve circle{fill:var(--bg);stroke:var(--line);stroke-width:3}
.valve path{stroke:var(--line);stroke-width:3;fill:none}
.nd{cursor:pointer;outline:none}
.nd .ring{fill:var(--bg);stroke:var(--line);stroke-width:3;transition:fill .25s,stroke .25s}
.nd .n{font:700 19px 'Barlow Condensed',monospace;text-anchor:middle;fill:#fff;dominant-baseline:central;transition:fill .25s}
.nd .t{font:italic 800 30px 'Barlow Condensed',sans-serif;fill:#fff;text-transform:uppercase;letter-spacing:.02em}
.nd .s{font:600 16px 'Barlow Condensed',monospace;fill:var(--dim);letter-spacing:.06em}
.nd:hover .ring,.nd:focus-visible .ring{stroke:var(--yellow)}
.nd.on .ring{fill:var(--yellow);stroke:var(--yellow)}
.nd.on .n{fill:#111}
.nd.on .t{fill:var(--yellow)}
.drop{fill:var(--yellow)}
.panel{background:var(--panel);border:1px solid #ffffff2a;padding:28px 26px;position:relative}
.panel .c{width:18px;height:18px}
.panel .c.tl{top:-6px;left:-6px}.panel .c.br{bottom:-6px;right:-6px}
.panel h3{font-size:46px;margin:0 0 12px}
.panel p{margin:0 0 18px;color:#d8d3c4}
.panel ul{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:8px;font:600 15.5px/1.4 'Barlow Condensed',monospace;color:#cfc9b8}
.panel li{display:flex;gap:10px}.panel li:before{content:"";flex:none;width:10px;height:10px;margin-top:5px;border:2px solid var(--yellow);transform:rotate(45deg)}
.tagbox{display:inline-block;font:700 16px 'Barlow Condensed',monospace;letter-spacing:.08em;text-transform:uppercase;color:#111;background:var(--yellow);padding:8px 12px}
.panel .swap{animation:swap .35s ease}
@keyframes swap{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media(max-width:980px){.diag{grid-template-columns:1fr}.nd .t{font-size:34px}}

/* diagnosis */
.dgx{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:stretch}
.opts{display:grid;gap:12px}
.opts button{font:inherit;text-align:left;cursor:pointer;display:flex;align-items:center;gap:16px;background:#ffffff0a;color:#fff;border:1px solid #ffffff33;padding:18px 20px;transition:.2s}
.opts button .k{font:700 16px 'Barlow Condensed',monospace;color:var(--yellow);width:30px}
.opts button b{font:italic 800 27px/1 'Barlow Condensed',sans-serif;text-transform:uppercase;letter-spacing:.03em}
.opts button:hover{background:#ffffff16;transform:translateX(6px)}
.opts button[aria-pressed=true]{background:var(--yellow);color:#111;border-color:var(--yellow)}
.opts button[aria-pressed=true] .k{color:#111}
.term{background:#080808;border:1px solid #ffffff33;min-height:300px;display:flex;flex-direction:column}
.term .bar{display:flex;gap:7px;padding:11px 14px;border-bottom:1px solid #ffffff22;font:600 13px 'Barlow Condensed',monospace;color:var(--dim);letter-spacing:.1em;text-transform:uppercase;align-items:center}
.term .bar i{width:10px;height:10px;border-radius:50%;background:#333}
.term .bar span{margin-left:auto}
.term pre{margin:0;padding:22px;font:600 17px/1.75 'Barlow Condensed',monospace;color:#e6e1d2;white-space:pre-wrap;word-break:break-word;flex:1}
.term pre .pr{color:var(--yellow)}.term pre .ok{color:var(--yellow)}.term pre .warn{color:var(--red)}.term pre .dim{color:#7d7868}
.caret{display:inline-block;width:9px;height:17px;background:var(--yellow);vertical-align:-3px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:.3}}
.term .foot{padding:14px 22px;border-top:1px solid #ffffff22;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.term .foot span{font:600 14px 'Barlow Condensed',monospace;color:var(--dim);letter-spacing:.08em;text-transform:uppercase}
@media(max-width:900px){.dgx{grid-template-columns:1fr}}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{background:var(--panel);border:1px solid #ffffff22;padding:26px 22px;position:relative}
.step b{display:block;font:italic 800 52px/1 'Barlow Condensed',sans-serif;color:var(--yellow)}
.step h3{font-size:30px;margin:8px 0 8px}
.step p{margin:0;color:#cfc9b8;font-size:16px}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}

/* area + form */
.two{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start}
.areas{list-style:none;margin:0;padding:0}
.areas li{display:flex;align-items:center;padding:15px 0;border-bottom:1px dashed #ffffff30;font:italic 800 28px/1 'Barlow Condensed',sans-serif;text-transform:uppercase;letter-spacing:.03em}
.areas li:before{content:"";width:12px;height:12px;border:2px solid var(--yellow);border-radius:50%;margin-right:14px}
.areas li span{flex:1}
.areas small{font:600 14px 'Barlow Condensed',monospace;color:var(--dim);letter-spacing:.1em}
.note{font:600 15px/1.6 'Barlow Condensed',monospace;color:var(--dim);margin:18px 0 0}
.form{background:var(--panel);border:1px solid #ffffff2a;padding:30px 28px;position:relative}
.form .c{width:18px;height:18px}.form .c.tl{top:-6px;left:-6px}.form .c.br{bottom:-6px;right:-6px}
.field{margin-bottom:16px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{display:block;font:600 14px 'Barlow Condensed',monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);margin-bottom:6px}
input,textarea,select{width:100%;padding:13px 14px;border:1px solid #ffffff44;border-radius:0;font:inherit;background:#0d0d0d;color:var(--white)}
input:focus,textarea:focus,select:focus{outline:2px solid var(--yellow);outline-offset:1px;border-color:var(--yellow)}
textarea{min-height:120px;resize:vertical}
select option{background:#0d0d0d}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.fine{font:600 14px/1.6 'Barlow Condensed',monospace;color:var(--dim)}
.fine a{color:var(--yellow)}
.status{margin-top:14px;font:600 15px 'Barlow',sans-serif}
.status.err{color:var(--red)}
@media(max-width:900px){.two{grid-template-columns:1fr}.row2{grid-template-columns:1fr}}

/* cta + footer */
.cta{padding:110px 0 100px;text-align:center;background:linear-gradient(180deg,#0000,#0a0a0acc 30%,#0a0a0a 100%)}
.cta h2{font-size:clamp(56px,11vw,150px)}
.cta h2 em{font-style:normal;color:var(--yellow)}
.cta p{color:#cfc9b8;margin:18px auto 30px;max-width:460px;font-size:19px}
.cta .callbtn{font-size:36px;padding:20px 38px}
footer{background:var(--bg2);color:var(--dim);font:600 15px/1.7 'Barlow Condensed',sans-serif;padding:30px 18px 34px;text-align:center;border-top:1px solid #ffffff18}
footer a{color:var(--yellow)}
.fnav{margin-bottom:8px}.fnav a{margin:0 10px}

/* legal + simple pages */
.pg{padding:70px 0 40px}
.pg h1{font-size:clamp(46px,7vw,84px);margin:0 0 14px}
.pg .sub{color:#cfc9b8;margin:0 0 30px;max-width:640px;font-size:18px}
.prose{max-width:760px}
.prose h2{font-size:34px;margin:34px 0 10px;color:var(--yellow)}
.prose p,.prose ul{margin:0 0 14px;color:#e6e1d2}
.prose ul{padding-left:22px}.prose li{margin:6px 0}
.prose a{color:var(--yellow)}
.sticky{position:fixed;left:0;right:0;bottom:0;background:var(--bg2);border-top:2px solid var(--yellow);padding:10px 16px;z-index:60;display:none}
.sticky .callbtn{display:block;text-align:center;font-size:24px}
@media(max-width:860px){.sticky{display:block}footer{padding-bottom:90px}}

/* reveal */
.js [data-r]{opacity:0;transform:translateY(30px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1);transition-delay:var(--d,0s)}
.js [data-r].in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.js [data-r]{opacity:1;transform:none;transition:none}.caret{animation:none}.pipe{transition:none}html{scroll-behavior:auto}}

/* photos */
.frame{padding:14px}
.hero-img{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;filter:saturate(.95) contrast(1.03)}
.fig .dial{position:absolute;left:-34px;bottom:-60px;width:224px;max-width:none;margin:0;background:#0c0c0ccc;backdrop-filter:blur(8px);border:1px solid #ffffff44;border-radius:50%;padding:10px;box-shadow:0 24px 50px #000a}
.fig .hint{margin:76px 0 0 150px;text-align:left}
.fig figcaption{margin-top:14px}
.pimg{display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;margin:0 0 20px}
@media(max-width:980px){.fig{max-width:520px}.fig .dial{position:relative;left:auto;bottom:auto;width:230px;margin:-70px 0 0 -4px}.fig .hint{margin:12px 0 0;text-align:left}}

.flogo{display:block;margin:0 auto 14px;height:84px;width:auto}

.howgrid{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px;align-items:center}
.howimg{position:relative;margin:0;padding:10px;border:1px solid #ffffff2a;background:var(--panel)}
.howimg img{display:block;width:100%;height:auto;max-height:620px;object-fit:cover;object-position:30% 20%}
.howgrid .steps{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.howgrid{grid-template-columns:1fr}.howimg{max-width:420px}}
@media(max-width:520px){.howgrid .steps{grid-template-columns:1fr}}