@font-face{font-family:Archivo;src:url(assets/fai-archivo-es-en-variable.woff2) format("woff2");font-weight:100 900;font-display:swap}@font-face{font-family:Shoulders;src:url(assets/fai-big-shoulders-es-en-variable.woff2) format("woff2");font-weight:100 900;font-display:swap}
:root{--coal:#171510;--ivory:#f6eddd;--amber:#f3b85d;--muted:#b9ac98;--brown:#947052;--line:#40392e;--body:Archivo,Arial,sans-serif;--display:Shoulders,Impact,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--coal);color:var(--ivory);font-family:var(--body);font-size:16px;line-height:1.65}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,.sun-stage:focus-visible{outline:2px solid var(--amber);outline-offset:6px}button{cursor:pointer}.skip{position:absolute;top:-80px;left:20px;z-index:10;background:var(--ivory);color:var(--coal);padding:10px}.skip:focus{top:10px}header{height:104px;max-width:1440px;margin:auto;padding:0 5.5%;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-family:var(--display);font-size:29px;letter-spacing:.07em;line-height:1}.brand img{object-fit:contain}.brand small{display:block;font-family:var(--body);font-size:9px;letter-spacing:.19em;margin-top:7px}nav{display:flex;gap:32px;font-size:13px}nav a,.header-contact{padding:12px 0;min-height:44px}.header-contact{font-size:13px;border-bottom:1px solid var(--brown)}.header-contact span{margin-left:25px;color:var(--amber)}.hero{max-width:1440px;margin:auto;position:relative;display:grid;grid-template-columns:1fr 1fr;padding:35px 5.5% 0;min-height:690px;align-items:center;column-gap:20px}.hero-copy{z-index:1;padding:10px 0 30px}.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:10px;font-weight:600;color:var(--amber);margin:0 0 25px}h1,h2{font-family:var(--display);font-weight:500;line-height:1.04;letter-spacing:-.015em;margin:0}h1{font-size:clamp(68px,6.7vw,100px)}em{color:var(--amber);font-style:normal}h2{font-size:clamp(52px,5.1vw,76px)}h3{font-size:19px;line-height:1.3;letter-spacing:-.02em;font-weight:500}.lede{font-size:16px;color:var(--muted);margin:28px 0}.button{min-height:52px;display:inline-flex;align-items:center;justify-content:space-between;gap:36px;padding:15px 22px;background:var(--amber);color:var(--coal);font-size:13px;font-weight:600;border:1px solid var(--amber);transition:background .2s}.button:hover{background:#ffe0a9}.hero-note{font-size:10px;color:var(--muted);margin-top:19px}.sun-figure{margin:0;min-width:0;align-self:center}.sun-stage{width:100%;aspect-ratio:1;position:relative;touch-action:pan-y;cursor:grab}.sun-stage.dragging{cursor:grabbing;touch-action:none}.poster,canvas{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}canvas{opacity:0;transition:opacity .3s}.poster{opacity:1;transition:opacity .3s;pointer-events:none}.sun-stage.ready canvas{opacity:1}.sun-stage.ready .poster{opacity:0}.sun-figure figcaption{display:flex;gap:8px;align-items:center;font-size:10px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}.renderer-label{margin-left:auto;font-size:9px}.status-dot{width:4px;height:4px;background:var(--amber);border-radius:50%}#sun-help{font-size:10px;color:var(--muted);margin:9px 0}.scene-tools{display:flex;gap:20px}.scene-tools button{border:0;border-bottom:1px solid var(--brown);color:var(--ivory);background:transparent;padding:8px 0;min-height:44px;font-size:10px}.hero-foot{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;align-self:end;font-size:10px;color:var(--muted);border-top:1px solid var(--line);padding:21px 0;margin-top:28px}.hero-foot a{padding:10px}.section{max-width:1282px;margin:auto;padding:112px 0;border-top:1px solid var(--line)}.split{display:grid;grid-template-columns:1.3fr 1fr;gap:60px;align-items:end}.section-lede{color:var(--muted);max-width:370px;font-size:17px;margin:0 0 6px}.friction-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:55px;margin-top:64px}.mini-icon{font-size:28px;color:var(--amber)}.friction-grid p,.circuit p,.method-list p,.questions p,.workshop p{color:var(--muted);font-size:14px;max-width:460px}.friction-grid h3{margin-top:20px}.system{position:relative}.circuit{display:grid;grid-template-columns:repeat(3,1fr);margin-top:60px;border-top:1px solid var(--brown);border-bottom:1px solid var(--line)}.circuit article{padding:35px 32px 30px 0;position:relative}.circuit article+article{border-left:1px solid var(--line);padding-left:32px}.step{color:var(--amber);font-size:10px;text-transform:uppercase;letter-spacing:.15em}.circuit h3{font-size:22px}.system-note{color:var(--muted);font-size:10px;margin-top:20px}.workshop{display:grid;grid-template-columns:1fr 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16px;font-size:12px;min-height:48px;margin-top:26px}.signal-path{display:flex;list-style:none;padding:0;justify-content:space-between;font-size:10px;color:var(--muted);margin-top:24px}.signal-path li{border-top:2px solid var(--line);padding-top:9px;width:28%;transition:color .3s,border-color .3s}.signal-path li.active{border-color:var(--amber);color:var(--amber)}#pulse-status{font-size:10px}#controls-note{font-size:10px;border-top:1px solid var(--line);padding-top:18px}.method-list{list-style:none;padding:0;margin:60px 0 0}.method-list li{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 2fr;gap:30px;padding:28px 0}.method-list li>span{font-size:11px;color:var(--amber);padding-top:4px}.method-list h3{margin:0;font-size:24px}.method-list p{max-width:620px;margin-bottom:0}.questions{display:grid;grid-template-columns:1fr 1fr;gap:100px}.questions h2{margin-bottom:25px}.faq details{border-bottom:1px solid var(--line)}summary{cursor:pointer;min-height:65px;padding:22px 32px 20px 0;position:relative;list-style:none;font-size:14px}summary::-webkit-details-marker{display:none}summary:after{content:'+';position:absolute;right:0;color:var(--amber)}details[open] summary:after{content:'−'}.faq p{padding-bottom:20px}.contact{text-align:center;padding:100px 0 110px}.contact h2{font-size:90px}.contact p:not(.eyebrow){color:var(--muted)}.contact .contact-note{font-size:10px;margin-top:22px}footer{border-top:1px solid var(--line);padding:32px 5.5%;display:flex;justify-content:space-between;align-items:center;font-size:10px;color:var(--muted)}.footer-brand{font-size:22px;color:var(--ivory)}.footer-brand span{font-family:var(--body);font-size:9px;letter-spacing:0}.noscript{padding:20px;text-align:center;font-size:12px}.scene-tools button:disabled,.instrument button:disabled,input:disabled{opacity:.5;cursor:default}
@media(min-width:1441px){.hero{min-height:760px}}@media(max-width:1400px){.section{margin-left:5.5%;margin-right:5.5%}}@media(max-width:1000px){.hero{min-height:650px}.hero h1{font-size:70px}.sun-figure figcaption{flex-wrap:wrap}.renderer-label{margin-left:0}.workshop,.questions{gap:45px}.instrument{padding:25px}.friction-grid{gap:28px}.section{padding:85px 0}.split{gap:30px}}@media(max-width:700px){header{height:110px;padding:10px 6% 0;flex-wrap:wrap}.brand{font-size:22px;gap:8px}.brand img{width:28px;height:28px}.brand small{font-size:7px}nav{display:flex;order:3;width:100%;justify-content:space-between;gap:10px;font-size:10px;border-top:1px solid var(--line)}nav a{padding:9px 0;min-height:44px}.header-contact{font-size:11px}.header-contact span{margin-left:10px}.hero{padding:0 6%;display:flex;flex-direction:column;min-height:0;gap:0}.sun-figure{order:0;width:100%;display:contents}.sun-stage{order:0;width:min(100%,350px);height:285px;aspect-ratio:auto;margin-top:-4px}.poster,canvas{object-fit:contain}.hero-copy{order:1;padding:0;width:100%}.eyebrow{font-size:10px;margin-bottom:16px}.hero h1{font-size:clamp(52px,13vw,76px);line-height:1.02}.lede{font-size:13px;margin:18px 0}.button{font-size:11px;padding:13px 17px;min-height:48px;gap:20px}.hero-note{font-size:9px;margin:14px 0 0}.sun-figure figcaption{order:2;width:100%;margin-top:27px;font-size:9px}.sun-figure #sun-help{order:3;align-self:flex-start}.scene-tools{order:4;align-self:flex-start;gap:22px}.hero-foot{order:5;width:100%;font-size:8px;margin-top:18px;padding:13px 0}.hero-foot span{max-width:140px}.section{margin:0 6%;padding:67px 0}h2{font-size:53px}.split,.workshop,.questions{display:block}.section-lede{font-size:14px;margin-top:25px}.friction-grid{display:block;margin-top:40px}.friction-grid article{border-top:1px solid var(--line);padding:22px 0}.mini-icon{font-size:22px}.friction-grid h3{margin:10px 0}.friction-grid p{margin-bottom:0}.circuit{display:block;margin-top:35px}.circuit article,.circuit article+article{padding:26px 0;border-left:0}.circuit article+article{border-top:1px solid var(--line)}.circuit h3{margin:12px 0}.circuit p{margin:0}.instrument{margin-top:36px;padding:25px}.instrument-title span{float:none;display:block;margin-top:3px}.workshop h2{margin-bottom:24px}.method-list{margin-top:35px}.method-list li{display:block;padding:25px 0}.method-list h3{margin-top:12px;font-size:22px}.faq{margin-top:30px}summary{font-size:13px}.contact h2{font-size:61px}.contact p{font-size:13px}footer{flex-wrap:wrap;gap:16px;padding:28px 6%}footer p{width:100%;order:2;margin:0}.footer-brand{font-size:19px}.footer-brand span{font-size:8px}.renderer-label{margin-left:auto}}@media(max-width:360px){.sun-stage{height:245px}.hero h1{font-size:51px}.hero .lede{font-size:12px}.hero .button{font-size:10px}h2{font-size:46px}.instrument{padding:18px}.scene-tools{gap:15px}}@media(min-width:701px) and (max-height:600px){header{height:76px}.hero{min-height:0;padding-top:16px;align-items:start}.hero-copy{padding:8px 0 12px}.hero .eyebrow{margin-bottom:12px}.hero h1{font-size:clamp(48px,4.4vw,64px)}.hero .lede{margin:14px 0}.hero .button{min-height:48px;padding:12px 20px}.hero-note{margin-top:12px}.sun-stage{width:min(100%,340px);margin-inline:auto}.hero-foot{margin-top:16px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* One native scene follows its controls only inside the bounded laboratory. */
.solar-lab{align-items:start;row-gap:32px}
.solar-lab .hero-copy{grid-column:1;grid-row:1;min-height:min(660px,calc(100svh - 104px));display:flex;flex-direction:column;justify-content:center;align-items:flex-start}
.solar-lab .sun-figure{grid-column:2;grid-row:1 / span 2;position:sticky;top:16px;align-self:start;background:var(--coal);z-index:2}
.solar-lab .sun-stage{width:min(100%,calc(100svh - 150px));height:auto;aspect-ratio:1;margin:0 auto}
.solar-lab .workshop{grid-column:1;grid-row:2;display:block;margin:0;padding:40px 0 0;width:100%}
.solar-lab .workshop h2{font-size:clamp(46px,4.5vw,66px)}
.solar-lab .instrument{margin-top:32px}
.solar-lab .hero-foot{grid-row:3;margin-top:0}
.solar-lab input,.solar-lab button{scroll-margin-block:28px}
@media(max-width:700px){
 .solar-lab{display:grid;grid-template-columns:minmax(0,1fr);row-gap:24px;padding-top:24px}
 .solar-lab .hero-copy{grid-column:1;grid-row:1;min-height:0;padding:0}
 .solar-lab .sun-figure{grid-column:1;grid-row:2;display:block;top:0;width:100%;padding:4px 0 8px;border-bottom:1px solid var(--line)}
 .solar-lab .sun-stage{width:100%;height:150px;aspect-ratio:auto}
 .solar-lab .sun-figure figcaption{margin-top:0;padding-top:6px;font-size:9px}
 .solar-lab #sun-help{font-size:9px;margin:4px 0}
 .solar-lab .scene-tools{gap:20px}
 .solar-lab .workshop{grid-column:1;grid-row:3;padding-top:8px;border-top:0}
 .solar-lab .instrument{padding:18px;margin-top:24px}
 .solar-lab .hero-foot{grid-row:4}
 .solar-lab .workshop :is(input,button,a){scroll-margin-top:260px}
}
@media(max-width:700px) and (max-height:600px){
 .solar-lab .sun-stage{height:100px}
 .solar-lab #sun-help{font-size:8px;line-height:1.4}
 .solar-lab .workshop :is(input,button,a){scroll-margin-top:205px}
}
/* A short viewport needs a side-by-side specimen, not a full-width sticky barrier.
   Only the scene sticks; every caption, instruction and control stays in native page flow. */
@media(max-width:700px) and (max-height:300px){
 .solar-lab{grid-template-columns:minmax(96px,1fr) minmax(0,2fr);column-gap:16px;row-gap:16px}
 .solar-lab .hero-copy{grid-column:1 / -1}
 .solar-lab .sun-figure{display:contents;position:static}
 .solar-lab .sun-stage{grid-column:1;grid-row:2 / span 4;position:sticky;top:8px;align-self:start;width:min(100%,calc(100svh - 24px));height:auto;aspect-ratio:1;background:var(--coal);z-index:2}
 .solar-lab .sun-figure figcaption{grid-column:2;grid-row:2;font-size:10px}
 .solar-lab #sun-help{grid-column:2;grid-row:3;font-size:12px;line-height:1.65;margin:0}
 .solar-lab .scene-tools{grid-column:2;grid-row:4;flex-wrap:wrap;gap:8px 16px}
 .solar-lab .scene-tools button{font-size:12px;min-width:44px}
 .solar-lab .workshop{grid-column:2;grid-row:5;min-width:0}
 .solar-lab .workshop h2{font-size:46px}
 .solar-lab .instrument{padding:12px}
 .solar-lab label{flex-wrap:wrap;gap:0 8px}
 .solar-lab .hero-foot{grid-column:1 / -1;grid-row:6}
 .solar-lab :is(input,button),.solar-lab .workshop :is(input,button,a){scroll-margin-block:36px}
}