.roof-page{--roof-line:#c9ccc1;--outside:#467460;--return:#bd7939;--supply:#397f91;--hot:#b95735;--liquid:#be8733;--cold:#36778b;--vapor:#536b90;background:var(--paper)}
.roof-page .site-header{position:relative}
.roof-main{max-width:1504px}.roof-intro{display:flex;justify-content:space-between;align-items:flex-end;padding:32px 0 30px;gap:25px}.roof-breadcrumb{font:11px PlexMono,monospace;color:var(--muted);margin-bottom:15px}.roof-breadcrumb a{text-underline-offset:4px}.roof-intro h1{font-size:clamp(44px,5.15vw,76px);letter-spacing:-.065em;line-height:1.03}.roof-intro h1 span{color:var(--blue)}.roof-intro>p{font-size:16px;line-height:1.5;padding-bottom:3px;flex-shrink:0}
.roof-page button{font-family:General,Arial,sans-serif;cursor:pointer;touch-action:manipulation}.roof-page button:focus-visible,.roof-page summary:focus-visible{outline:3px solid #1f6550;outline-offset:4px}.roof-lab{border:1px solid var(--roof-line);background:#f9f7ef}.roof-scenarios{display:flex;align-items:stretch;border-bottom:1px solid var(--roof-line);min-height:56px}.roof-scenarios>span{align-self:center;padding:0 23px;font:10px PlexMono,monospace;color:var(--muted);white-space:nowrap}.roof-scenarios button{background:transparent;color:var(--ink);border:0;border-right:1px solid var(--roof-line);padding:15px 20px;font-size:13px;transition:background .2s}.roof-scenarios button b{font:10px PlexMono,monospace;padding-right:10px;color:var(--muted)}.roof-scenarios button:hover{background:#e7e9dc}.roof-scenarios button[aria-pressed=true]{background:var(--accent)}.roof-scenarios #reset-lab{margin-left:auto;border-right:0;font-size:12px;padding:15px 20px;color:var(--muted)}
.roof-workbench{display:grid;grid-template-columns:minmax(0,1fr) 300px}.roof-visual{min-width:0;position:relative;border-right:1px solid var(--roof-line);background:#edece1}.roof-viewbar{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:2;padding:18px 22px 0}.roof-view-switch{display:flex;background:#f9f7ef;border:1px solid #adb8aa}.roof-viewbar button{font-size:12px;border:0;min-height:36px;padding:8px 14px;color:var(--ink);background:transparent}.roof-view-switch button[aria-pressed=true]{background:var(--ink);color:var(--paper)}.roof-viewbar #cabinet-toggle{font-size:11px;border-bottom:1px solid #b5bdaf;padding:3px 0;min-height:30px}.roof-stage{position:relative;aspect-ratio:1020/540;overflow:hidden;margin:0}.roof-stage svg{display:block;width:100%;height:100%}.roof-pins{position:absolute;inset:0;pointer-events:none}.roof-pin{position:absolute;transform:translate(-50%,-50%);width:32px;height:32px;border:1px solid #657668;border-radius:50%;background:var(--paper);color:var(--ink);font:12px PlexMono,monospace!important;pointer-events:auto;box-shadow:0 2px 0 #18252225;transition:background .18s,scale .18s}.roof-pin:hover{scale:1.14;background:#fff}.roof-pin[aria-pressed=true]{background:var(--accent);border-color:var(--ink);box-shadow:0 0 0 5px #f3ce3529}.roof-pin::before{content:'';position:absolute;inset:-6px}.roof-legend{display:flex;align-items:center;gap:18px;padding:0 22px 15px;min-height:40px;color:#46584d}.roof-legend>span{display:flex;align-items:center;gap:6px;font-size:11px;white-space:nowrap}.roof-legend i{width:15px;height:3px;display:inline-block;background:var(--outside)}.roof-legend .air-return{background:var(--return)}.roof-legend .air-supply{background:var(--supply)}.roof-legend button{margin-left:auto;background:transparent;border:0;color:var(--muted);font-size:11px;padding:7px 0;min-height:32px;white-space:nowrap}.roof-component{display:flex;align-items:flex-start;gap:15px;border-top:1px solid var(--roof-line);background:#f9f7ef;min-height:141px;padding:20px 22px}.roof-component-number{font:13px PlexMono,monospace;min-width:24px;padding-top:5px;color:var(--green)}.roof-component h2{font-size:21px;line-height:1.2;letter-spacing:-.025em;margin:0 0 8px}.roof-component p{font-size:12px;line-height:1.55;color:#546256;max-width:600px}.roof-component p+p{margin:6px 0 0}.roof-component .roof-component-state{color:var(--green);font-weight:500}.roof-component>button{align-self:center;margin-left:auto;background:none;border:0;font-size:12px;white-space:nowrap;padding:12px 0 12px 8px;color:var(--ink)}
.roof-controls{padding:25px 23px 19px;background:#faf8f0}.roof-controls-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:25px}.roof-controls h2{font-size:23px;letter-spacing:-.035em}.roof-units{display:flex;gap:1px}.roof-units button{padding:6px;font-size:11px;color:var(--muted);border:0;background:none;min-width:29px;min-height:32px}.roof-units button[aria-pressed=true]{color:var(--ink);background:#e8e8dd}.roof-field{margin-bottom:23px}.roof-field label{display:flex;justify-content:space-between;align-items:center;font-size:13px;margin-bottom:4px}.roof-field output{font-size:25px;font-weight:500;letter-spacing:-.04em;font-variant-numeric:tabular-nums}.roof-controls input[type=range]{appearance:none;-webkit-appearance:none;background:transparent;height:28px;width:100%;display:block;margin:4px 0;cursor:pointer;border-radius:0;accent-color:#31594b}.roof-controls input[type=range]::-webkit-slider-thumb{appearance:none;width:16px;height:24px;margin-top:-10px;border-radius:2px;border:2px solid var(--paper);background:#31594b;box-shadow:0 0 0 1px #31594b}.roof-controls input[type=range]::-moz-range-thumb{width:12px;height:20px;border-radius:2px;border:2px solid var(--paper);background:#31594b;box-shadow:0 0 0 1px #31594b}.roof-controls input:focus-visible{outline:2px solid #31594b;outline-offset:3px}.roof-controls input:disabled{opacity:.45;cursor:default}.roof-range{display:flex;justify-content:space-between;color:var(--muted);font:10px PlexMono,monospace;margin-top:4px}.roof-damper{border-top:1px solid var(--roof-line);padding-top:21px}.roof-damper-heading{display:flex;align-items:center;justify-content:space-between;font-size:13px;margin-bottom:13px}.roof-damper-heading output{font:20px PlexMono,monospace}.roof-control-switch{display:flex;border:1px solid #b8c0b0;margin-bottom:8px}.roof-control-switch button{border:0;background:transparent;font-size:11px;padding:9px 13px;flex:1;color:var(--muted);min-height:35px}.roof-control-switch button[aria-pressed=true]{background:#e0e6d7;color:var(--ink);font-weight:600}.roof-damper p{font-size:11px;line-height:1.6;color:#50634e;margin-top:12px}.roof-damper .roof-model-note{font-size:10px;color:var(--muted);margin-top:7px}.roof-live-status{position:relative;border-top:1px solid var(--roof-line);margin-top:18px;padding:16px 0 0 15px}.roof-running-dot{position:absolute;left:0;top:23px;width:6px;height:6px;background:#3e6e4e;border-radius:50%}.roof-live-status strong{display:block;font-size:12px;font-weight:600}.roof-live-status p{font-size:11px;line-height:1.55;color:var(--muted);margin:7px 0 0}
.roof-air-balance{border-top:1px solid var(--roof-line);display:grid;grid-template-columns:1fr auto 1.35fr auto 1fr;align-items:center;padding:20px 30px;gap:25px;background:#e5e8da}.roof-air-balance>div{display:flex;flex-direction:column}.roof-air-balance>div>span{font-size:12px}.roof-air-balance strong{font-size:33px;letter-spacing:-.04em;line-height:1.35;font-weight:500;font-variant-numeric:tabular-nums}.roof-air-balance strong small{font-size:16px}.roof-air-balance small{font-size:10px;color:var(--muted)}.roof-balance-arrow{font-size:26px;color:#9aa88e}.roof-takeaway{display:grid;grid-template-columns:35px 1fr .9fr;gap:20px;padding:30px 0 35px;align-items:start}.roof-takeaway>span{font-size:36px;line-height:1;color:var(--green)}.roof-takeaway h2{font-size:23px;letter-spacing:-.035em;line-height:1.2;margin-bottom:9px}.roof-takeaway p{font-size:13px;line-height:1.6;color:var(--muted);max-width:520px}.roof-comparison{padding:1px 0 0 30px}.roof-comparison>span{font-size:11px;display:block;color:var(--muted);margin-bottom:11px}.roof-comparison>div{display:grid;grid-template-columns:115px 1fr 62px;align-items:center;gap:9px;margin:8px 0;font-size:10px}.roof-comparison b{font:10px PlexMono,monospace;text-align:right}.roof-bar-track{height:7px;background:#dedfcf;overflow:hidden}.roof-bar-track i{display:block;height:100%;background:#9dada0;transition:width .3s}.roof-bar-track #current-bar{background:#315b4b}
.roof-footnotes{display:grid;grid-template-columns:1fr 1.3fr;gap:80px;border-top:1px solid var(--roof-line);padding:38px 0 50px}.roof-footnotes h2{font-size:36px;line-height:1.07;letter-spacing:-.04em;margin-bottom:18px}.roof-footnotes p{font-size:13px;line-height:1.7;color:var(--muted)}.roof-footnotes>div>a{font-size:12px;display:inline-block;margin-top:20px;text-underline-offset:4px}.roof-footnotes details{border-bottom:1px solid var(--roof-line);padding:15px 0}.roof-footnotes summary{cursor:pointer;font-size:14px}.roof-footnotes details p{font-size:12px;line-height:1.7;margin-top:13px}.roof-footnotes details a{text-underline-offset:3px}.roof-footer{display:flex;justify-content:space-between;gap:20px;padding-top:20px;padding-bottom:28px;border-top:1px solid var(--roof-line);font-size:11px;color:var(--muted)}
/* The drawing is projected geometry; color carries circuit meaning. */
#rooftop{font-family:General,Arial,sans-serif}#rooftop .pipe{fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-width:7}#rooftop .pipe-flow{fill:none;stroke:#fff6d9;stroke-width:2;stroke-dasharray:2 22;stroke-linecap:round;animation:roof-flow 3s linear infinite}#rooftop .air-stream{fill:none;stroke-width:2;stroke-dasharray:5 18;stroke-linecap:round;animation:roof-flow 3s linear infinite}#rooftop .fan-spin{animation:roof-spin 2s linear infinite;transform-box:fill-box;transform-origin:center}#rooftop .circuit-muted{opacity:.25}#rooftop .diagram-label{font-size:12px;fill:#53634f}#rooftop .diagram-note{font:10px PlexMono,monospace;fill:var(--muted)}#rooftop .diagram-value{font-size:20px;font-weight:500;fill:#243c30;letter-spacing:-.6px}#rooftop .case-cover{transition:opacity .3s}#rooftop .airflow-layer,#rooftop .refrigerant-layer{transition:opacity .25s}.roof-page[data-view=refrigerant] #rooftop .airflow-layer{opacity:.12}.roof-page[data-view=air] #rooftop .refrigerant-layer{opacity:.46}.roof-page[data-mechanical=false] #rooftop .refrigerant-layer{opacity:.28}.roof-page[data-mechanical=false] #rooftop .mechanical-motion{animation-play-state:paused}.roof-page[data-mechanical=false] #rooftop .rejection-layer{opacity:.15}.roof-page[data-paused=true] #rooftop *{animation-play-state:paused!important}.roof-noscript{padding:20px;background:var(--accent)}
@keyframes roof-flow{to{stroke-dashoffset:-92}}@keyframes roof-spin{to{transform:rotate(360deg)}}
@media(min-width:1450px){.roof-stage{aspect-ratio:1020/510}.roof-controls{padding-top:28px}.roof-field{margin-bottom:28px}.roof-component p{font-size:13px}}
@media(max-width:1100px){.roof-workbench{grid-template-columns:minmax(0,1fr) 265px}.roof-controls{padding:22px 18px 16px}.roof-intro h1{font-size:55px}.roof-intro>p{font-size:13px}.roof-stage{aspect-ratio:1020/610}.roof-stage svg{position:absolute;top:5%;height:90%}.roof-pins{top:5%;bottom:5%}.roof-scenarios button{padding:13px 14px;font-size:12px}.roof-scenarios>span{padding:0 16px}.roof-legend{gap:12px;padding-inline:17px}.roof-legend>span{font-size:10px}.roof-component{padding:18px 17px;gap:10px}.roof-component h2{font-size:19px}.roof-comparison{padding-left:0}.roof-takeaway{grid-template-columns:28px 1fr 1fr}.roof-controls h2{font-size:21px}.roof-air-balance{gap:18px}}
@media(max-width:850px){.roof-intro{align-items:flex-start;flex-direction:column;gap:15px;padding-top:24px}.roof-intro h1{font-size:clamp(43px,7.6vw,62px)}.roof-intro>p{font-size:15px}.roof-intro>p br{display:none}.roof-workbench{grid-template-columns:1fr}.roof-visual{border-right:0}.roof-stage{aspect-ratio:1020/515}.roof-stage svg{position:static;height:100%}.roof-pins{inset:0}.roof-controls{display:grid;grid-template-columns:1fr 1fr;gap:15px 28px;border-top:1px solid var(--roof-line);padding:25px}.roof-controls-heading{grid-column:1/-1;margin-bottom:4px}.roof-field{margin-bottom:0}.roof-damper{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;column-gap:28px}.roof-damper-heading{grid-column:1;grid-row:1}.roof-control-switch{grid-column:2;grid-row:1/3;margin:0;align-self:start}.roof-damper input{grid-column:1;grid-row:2}.roof-damper .roof-range{grid-column:1;grid-row:3;margin-top:10px}.roof-damper #damper-note{grid-column:2;grid-row:3/5;margin:0}.roof-damper .roof-model-note{grid-column:1/-1}.roof-live-status{grid-column:1/-1;margin-top:0;padding-top:13px}.roof-live-status p{margin-top:4px}.roof-live-status .roof-running-dot{top:20px}.roof-takeaway{grid-template-columns:25px 1fr}.roof-comparison{grid-column:2;max-width:500px}.roof-footnotes{gap:35px;grid-template-columns:.8fr 1.2fr}.roof-nav{gap:20px}.roof-air-balance{padding:22px}}
@media(max-width:560px){.roof-page{--gutter:18px}.roof-nav{font-size:11px}.roof-nav span{display:none}.roof-intro{padding:23px 0}.roof-intro h1{max-width:340px;font-size:51px;line-height:.99}.roof-intro h1 span{display:block}.roof-intro>p{font-size:14px;max-width:265px}.roof-intro>p br{display:block}.roof-breadcrumb{font-size:10px;margin-bottom:14px}.roof-scenarios{flex-wrap:wrap}.roof-scenarios>span{width:100%;font-size:9px;padding:12px 14px 4px}.roof-scenarios button{flex:1;padding:12px 9px;font-size:11px;line-height:1.3;text-align:left;min-height:57px}.roof-scenarios button b{display:block;margin-bottom:4px;font-size:9px}.roof-scenarios #reset-lab{position:absolute;right:19px;margin-top:-4px;padding:6px 13px;font-size:10px;min-height:34px}.roof-viewbar{padding:14px 12px 0}.roof-viewbar button{font-size:11px;padding:8px 12px;min-height:37px}.roof-viewbar #cabinet-toggle{font-size:10px}.roof-stage{aspect-ratio:1020/660}.roof-stage svg{position:absolute;width:119%;max-width:none;height:100%;left:-9.5%}.roof-pins{left:-9.5%;right:-9.5%;top:9%;bottom:9%}.roof-pin{width:27px;height:27px;font-size:10px!important}.roof-legend{flex-wrap:wrap;gap:9px;padding:2px 13px 12px}.roof-legend>span{font-size:9px;gap:4px}.roof-legend i{width:11px}.roof-legend button{font-size:9px}.roof-component{min-height:169px;padding:17px 14px;gap:8px}.roof-component-number{min-width:19px;font-size:11px}.roof-component h2{font-size:18px}.roof-component p{font-size:11px}.roof-component>button{font-size:10px;padding-left:3px}.roof-controls{padding:20px 18px;gap:19px}.roof-controls-heading{margin:0}.roof-controls h2{font-size:23px}.roof-field label{font-size:11px;display:block}.roof-field output{display:block;margin-top:4px;font-size:29px}.roof-damper{display:block;padding-top:17px}.roof-damper-heading{font-size:12px}.roof-control-switch{margin-bottom:9px}.roof-damper .roof-range{margin-top:4px}.roof-control-switch button{font-size:12px;min-height:38px}.roof-damper #damper-note{margin-top:14px}.roof-live-status{margin:0}.roof-air-balance{grid-template-columns:1fr;gap:13px;padding:19px}.roof-air-balance>div{display:grid;grid-template-columns:1fr auto;gap:1px 10px;align-items:center}.roof-air-balance>div>span{font-size:12px}.roof-air-balance strong{font-size:28px;grid-column:2;grid-row:1/3}.roof-air-balance small{font-size:9px}.roof-balance-arrow{display:none}.roof-takeaway{padding-top:25px;gap:12px}.roof-takeaway h2{font-size:24px}.roof-takeaway p{font-size:13px}.roof-comparison{margin-top:9px;grid-column:1/-1}.roof-comparison>div{grid-template-columns:115px 1fr 64px}.roof-footnotes{grid-template-columns:1fr;padding:28px 0 35px;gap:18px}.roof-footnotes h2{font-size:32px}.roof-footnotes h2 br{display:none}.roof-footnotes p{font-size:13px}.roof-footer{flex-direction:column;gap:7px}.roof-page[data-view=refrigerant] .roof-legend{gap:8px}.roof-page[data-view=refrigerant] .roof-legend>span{font-size:8px}}
@media(prefers-reduced-motion:reduce){.roof-page *{scroll-behavior:auto!important;transition:none!important}#rooftop *{animation:none!important}}
/* Pins use the SVG screen matrix, including responsive letterboxing. */
.roof-page .roof-pins{inset:0}.roof-page .roof-pins[hidden]{display:none}.roof-page button:disabled{cursor:default}
.roof-mobile-temperatures{display:none}.roof-page[data-mechanical=false] #rooftop .rejection-layer{display:none}
@media(max-width:560px){#rooftop .diagram-label,#rooftop .diagram-value,#rooftop .diagram-note{display:none}.roof-mobile-temperatures{display:flex;justify-content:space-between;padding:0 15px 16px;gap:12px}.roof-mobile-temperatures span{font-size:10px;color:var(--muted)}.roof-mobile-temperatures b{display:block;font-size:16px;color:var(--ink);font-weight:500;margin-top:1px}.roof-page[data-view=refrigerant] .roof-legend{gap:9px 14px;display:grid;grid-template-columns:1fr 1fr auto}.roof-page[data-view=refrigerant] .roof-legend>span{font-size:10px}.roof-page[data-view=refrigerant] .roof-legend button{grid-column:3;grid-row:1/3}}
/* Circuit audit: complete paths, stable rotor axes and readable idle states. */
#rooftop .pipe{stroke-width:4.5}#rooftop .pipe-flow{stroke-width:1.5;stroke-dasharray:2 20}
#rooftop .fan-spin{transform-box:view-box;transform-origin:0px 0px}
#rooftop .supply-fan-spin{animation-direction:reverse}
.roof-page[data-view=air] #rooftop .refrigerant-layer{opacity:.22}
.roof-page[data-view=air] #rooftop .component-leader{display:none}
.roof-page[data-mechanical=false] #rooftop .refrigerant-layer{opacity:.75}
.roof-page[data-mechanical=false] #rooftop .pipe-color{stroke:#879383}
.roof-page[data-mechanical=false] #rooftop .refrigerant-layer .pipe-flow,
.roof-page[data-mechanical=false] #rooftop .refrigerant-layer .flow-direction{display:none}
.roof-page[data-view=air][data-mechanical=false] #rooftop .refrigerant-layer{opacity:.18}
.roof-circuit-status{font-size:10px;line-height:1.5;color:var(--muted);padding:0 22px 10px;min-height:25px}
.roof-legend{flex-wrap:wrap;column-gap:15px}
@media(max-width:560px){.roof-circuit-status{padding:0 15px 12px;font-size:10px}.roof-page .roof-legend{display:grid;grid-template-columns:1fr 1fr auto;gap:9px 12px}.roof-page .roof-legend>span{font-size:10px}.roof-page .roof-legend button{grid-column:3;grid-row:1/3}.roof-page[data-view=refrigerant][data-mechanical=false] .roof-legend{display:flex}}

/* Keep the fine track inside a larger pointer target. */
.roof-controls input[type=range]::-webkit-slider-runnable-track{height:4px;background:linear-gradient(to right,#31594b var(--fill,50%),#dbded2 var(--fill,50%))}
.roof-controls input[type=range]::-moz-range-track{height:4px;background:linear-gradient(to right,#31594b var(--fill,50%),#dbded2 var(--fill,50%))}

/* Public resource, setup sharing and the path into the service software. */
.roof-page [hidden]{display:none!important}
.roof-fallback{border:1px solid var(--roof-line);background:#edece1}
.roof-fallback img{display:block;width:100%;max-width:1020px;height:auto;margin:auto}
.roof-fallback p{padding:20px;font-size:14px;line-height:1.6}
.roof-share{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:15px 28px;border-top:1px solid var(--roof-line);padding:24px 0 32px}
.roof-share>div:first-child p{font-size:16px;font-weight:500;margin-bottom:6px}
.roof-share>div:first-child span{font-size:12px;color:var(--muted)}
.roof-share>button{display:inline-flex;align-items:center;gap:25px;padding:12px 17px;min-height:44px;background:transparent;color:var(--ink);border:1px solid #87968b;font-size:13px}
.roof-share>button:hover{background:var(--accent)}
#share-status:empty{display:none}#share-status{width:100%;font-size:13px;color:var(--green)}
#share-fallback{width:100%}#share-fallback label{display:block;font-size:12px;margin-bottom:8px}
#share-url{width:100%;padding:12px;font:13px General,Arial,sans-serif;border:1px solid #87968b;border-radius:0;background:#fffef9;color:var(--ink)}
.roof-product{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:30px 60px;align-items:center;background:#e5e8da;padding:36px;margin:0 0 40px;border:1px solid var(--roof-line)}
.roof-product h2{font-size:clamp(27px,3vw,38px);letter-spacing:-.04em;line-height:1.12;max-width:21ch}
.roof-product p{font-size:15px;line-height:1.7;color:var(--muted);max-width:62ch;margin:18px 0 0}
.roof-product-actions{display:flex;flex-direction:column;align-items:flex-start;gap:20px}
.roof-product-actions>a:not(.btn){font-size:13px;padding-block:6px}
.roof-product .btn{font-size:13px;gap:18px}
@media(max-width:850px){.roof-product{grid-template-columns:1fr;padding:28px;gap:24px}.roof-product-actions{flex-direction:row;flex-wrap:wrap;align-items:center;gap:16px 24px}.roof-product h2{max-width:27ch}}
@media(max-width:560px){.roof-share{align-items:flex-start;gap:18px}.roof-share>div:first-child span{line-height:1.6;display:block}.roof-product{padding:24px 20px;margin-bottom:28px}.roof-product p{font-size:14px}.roof-product-actions{gap:14px}.roof-product .btn{font-size:12px}.roof-product h2{font-size:30px}}