@font-face{font-family:Inter;src:url(assets/fonts/inter-latin.woff2) format('woff2');font-weight:100 900;font-display:swap}
@font-face{font-family:Inter;src:url(assets/fonts/inter-latin-ext.woff2) format('woff2');font-weight:100 900;font-display:swap;unicode-range:U+0100-02FF,U+1E00-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
:root{font-family:Inter,Arial,sans-serif;font-synthesis:none;color-scheme:light;--bg:#eef1ed;--ink:#203532;--muted:#50665b;--surface:#e1e8e0;--card:#f8faf6;--line:#728579;--accent:#216544;--blue:#276681;--flow:#a54410;--button:#1d5d48;--button-ink:#fff;--header-height:88px;--gutter:clamp(24px,4.2vw,80px);--layer-model:1;--layer-poster:3;--layer-copy:10;--layer-callouts:20;--layer-controls:30;--layer-header:40}
:root[data-theme=dark]{color-scheme:dark;--bg:#101b1c;--ink:#e9efed;--muted:#b0c1b8;--surface:#1b2a28;--card:#152820;--line:#789487;--accent:#a1d2af;--blue:#79c8e9;--flow:#ffac72;--button:#79c8e9;--button-ink:#112a32}
*{box-sizing:border-box}html{scroll-padding-top:calc(var(--header-height) + 20px);scroll-behavior:auto}body{margin:0;background:var(--bg);color:var(--ink);font-size:1.125rem;line-height:1.6}body:has(dialog[open]){overflow:hidden}main{padding-top:var(--header-height)}h1,h2,h3,p,figure{margin:0}h1,h2,h3{text-wrap:balance}h1,h2{font-weight:490;line-height:1.06;letter-spacing:-.055em}h1{font-size:clamp(3rem,5.2vw,5.6rem)}h2{font-size:clamp(2.5rem,4.4vw,4.4rem)}h3{font-size:1.3rem;line-height:1.25;font-weight:570;letter-spacing:-.025em}p{max-width:66ch}p+p{margin-top:1.1em}a{color:inherit;text-decoration:none}a.text-link{text-decoration:underline;text-underline-offset:.3em;text-decoration-thickness:1px}button,input,select,textarea{font:inherit;color:inherit}button,a,select,input{touch-action:manipulation;-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0;background:none}button:disabled,[aria-disabled=true]{cursor:default;opacity:1}input,select,textarea{border:1px solid var(--line);background:var(--card);border-radius:5px;min-width:0;min-height:48px;padding:10px 14px;width:100%}textarea{resize:vertical;line-height:1.5;max-width:100%}label{display:flex;flex-direction:column;gap:9px;font-size:1rem;font-weight:520}fieldset{min-width:0;border:0;padding:0;margin:0}legend{font-size:1.5rem;font-weight:550;margin:0 0 12px}button,select{min-height:44px}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--blue);outline-offset:5px}button:hover,a.button:hover{filter:brightness(.94)}svg{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;width:24px;height:24px}img{display:block;max-width:100%;height:auto}[hidden]{display:none!important}.sr-only,.skip-link:not(:focus){position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden;white-space:nowrap}.skip-link:focus{position:fixed;top:10px;left:12px;z-index:99;background:var(--card);padding:12px}.section{padding:clamp(70px,9vw,150px) var(--gutter)}.section-intro{display:grid;grid-template-columns:1.2fr 1fr;gap:12%;align-items:start;margin-bottom:48px}.section-intro p{color:var(--muted)}.section-intro a{margin-top:24px}.button{display:inline-flex;align-items:center;justify-content:center;gap:25px;min-height:50px;padding:13px 22px;border:1px solid var(--line);border-radius:28px;font-size:1rem;font-weight:550;line-height:1.5;text-align:center;max-width:100%}.button.primary{background:var(--button);color:var(--button-ink);border-color:var(--button)}.button.secondary{background:var(--card)}.text-link{display:inline-flex;gap:16px;align-items:center;min-height:44px;line-height:1.5}.helper,figcaption,.footer-label,.cell-note{font-size:.875rem;line-height:1.5;color:var(--muted)}.action-row{display:flex;flex-wrap:wrap;gap:14px}.text-button{min-height:44px;text-decoration:underline;text-underline-offset:5px;font-size:.875rem}.source-links{display:flex;flex-direction:column;gap:8px;margin-top:24px}
/* Quiet, persistent navigation. */
.site-header{position:fixed;inset:0 0 auto;z-index:var(--layer-header);min-height:var(--header-height);height:var(--header-height);padding:0 var(--gutter);display:flex;align-items:center;gap:36px;background:var(--bg);border-bottom:1px solid color-mix(in srgb,var(--line) 25%,transparent)}.brand{display:flex;align-items:center;flex-shrink:0;min-height:44px;width:130px}.brand img{width:130px;height:auto}.logo-dark{display:none}:root[data-theme=dark] .logo-light{display:none}:root[data-theme=dark] .logo-dark{display:block}.main-nav{display:flex;gap:26px;align-items:center;margin-left:auto}.main-nav>a{font-size:.875rem;font-weight:550;min-height:44px;display:flex;align-items:center;white-space:nowrap}.main-nav>a[aria-current=page]{text-decoration:underline;text-underline-offset:8px;text-decoration-thickness:2px}.main-nav>a:last-child{border:1px solid var(--line);border-radius:28px;padding:0 18px}.preferences{display:flex;align-items:center;gap:8px}.icon-button{display:grid;place-items:center;border:1px solid transparent;border-radius:50%;width:44px;min-width:44px;height:44px;padding:9px}.icon-button:hover{border-color:var(--line)}.theme-toggle [data-icon]{display:none}:root[data-preference=auto] [data-icon=auto],:root[data-preference=light] [data-icon=light],:root[data-preference=dark] [data-icon=dark]{display:contents}.menu-toggle{display:none}.close-icon{display:none}
/* Language disclosure shares the header palette; links remain ordinary navigation. */
.language-control{position:relative;flex:none}
.language-toggle{display:flex;align-items:center;justify-content:center;gap:4px;width:62px;min-height:44px;padding:7px 9px;border:1px solid color-mix(in srgb,var(--line) 55%,transparent);border-radius:24px;font-size:.875rem;font-weight:570;line-height:1.25}
.language-toggle>svg{width:16px;height:16px;transition:transform 150ms ease}
.language-toggle[aria-expanded=true]{background:var(--surface);border-color:var(--line)}
.language-toggle[aria-expanded=true]>svg{transform:rotate(180deg)}
.language-panel{position:absolute;right:0;top:calc(100% + 10px);width:min(16rem,calc(100vw - 24px));max-height:calc(100dvh - var(--header-height) - 20px);overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:7px;box-shadow:0 12px 32px rgb(8 22 17 / .18);animation:language-reveal 150ms ease-out;transform-origin:top right}
.language-panel ul{list-style:none;margin:0;padding:0;display:grid;gap:3px}
.language-panel a{display:grid;grid-template-columns:minmax(0,1fr) auto 18px;align-items:center;gap:12px;min-height:48px;padding:11px 12px;border-radius:10px;font-size:1rem;line-height:1.4}
.language-name{overflow-wrap:anywhere}
.language-code{font-size:1rem;color:var(--muted);font-weight:450}
.language-check{width:18px;height:18px;opacity:0;color:var(--accent)}
.language-panel a:hover{background:var(--surface)}
.language-panel a[aria-current=true]{background:var(--surface);font-weight:600}
.language-panel a[aria-current=true] .language-check{opacity:1}
.language-panel a:focus-visible{outline-offset:-3px}
:root[data-theme=dark] .language-panel{box-shadow:0 12px 32px rgb(0 0 0 / .32)}
@keyframes language-reveal{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
:root[data-reduced=yes] .language-panel{animation:none}
:root[data-reduced=yes] .language-toggle>svg{transition:none}
@media(max-width:700px){.language-panel{position:fixed;top:calc(var(--header-height) - 4px);right:12px;max-height:calc(100dvh - var(--header-height) - 8px)}}
:root[data-text-expanded=yes] .language-panel{position:fixed;top:calc(var(--header-height) - 4px);right:12px;max-height:calc(100dvh - var(--header-height) - 8px)}
/* The opening is one continuous installation, not repeated scene cards. */
.story{height:340svh;position:relative}.stage{position:sticky;top:var(--header-height);height:calc(100svh - var(--header-height));min-height:700px;overflow:hidden;background:var(--bg);isolation:isolate}.scene{position:absolute;inset:0}.scene canvas{position:absolute;inset:0;width:100%;height:100%;display:block;z-index:var(--layer-model)}.poster{position:absolute;inset:0;z-index:var(--layer-poster);display:grid;place-items:center;background:var(--bg)}.poster img{width:90%;height:65%;margin-top:12%;object-fit:contain}.scene[data-ready=yes] .poster{visibility:hidden;opacity:0;pointer-events:none}.story-status{position:absolute;bottom:21%;right:var(--gutter);z-index:4;font-size:.875rem;background:var(--card);padding:8px 14px;border-radius:4px}.scene[data-ready=yes] .story-status{display:none}.chapter-copy{position:absolute;left:var(--gutter);top:25px;width:min(480px,36%);z-index:var(--layer-copy)}.chapter-count{display:block;font-size:.875rem;color:var(--muted);margin-bottom:15px}.chapter-copy h1,.chapter-copy h2{font-size:clamp(2.9rem,4.5vw,4.4rem);max-width:600px}.chapter-copy p{margin-top:18px;color:var(--muted);font-size:1.125rem;line-height:1.55;max-width:380px;text-wrap:pretty}.chapter-copy .concept-caption{font-size:.875rem;margin-top:9px}.story-cta{margin-top:22px}.stage-bottom{position:absolute;bottom:24px;left:var(--gutter);right:var(--gutter);z-index:var(--layer-controls)}.play-button{display:flex;align-items:center;gap:12px;padding:0;font-size:.875rem;min-height:44px;margin-bottom:16px}.play-button svg{width:32px;height:32px;padding:7px;border:1px solid var(--line);border-radius:50%}.stage-nav{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.stage-nav button{display:flex;align-items:center;gap:16px;text-align:left;padding:12px 0;min-height:52px;border-top:1px solid var(--line);font-size:.875rem;line-height:1.4;color:var(--muted)}.stage-nav button[aria-current=step]{border-top:3px solid var(--accent);padding-top:10px;color:var(--ink);font-weight:600}.stage-nav button>span:first-child{font-size:.875rem}.labels{position:absolute;inset:0;z-index:var(--layer-callouts);pointer-events:none}.model-label{--label-accent:var(--accent);position:absolute;top:0;left:0;opacity:0;width:max-content;max-width:250px;padding:10px 14px 10px 17px;border:1px solid var(--line);border-left:3px solid var(--label-accent);border-radius:4px;background:var(--card);color:var(--ink);font-size:1.125rem;font-weight:570;line-height:1.25;letter-spacing:-.018em;white-space:normal;text-wrap:pretty;hyphens:none;word-break:normal;overflow-wrap:normal}.model-label[data-label=gas],.model-label[data-label=heat]{--label-accent:var(--flow)}.model-label[data-label=electricity]{--label-accent:var(--blue)}.label-leaders{position:absolute;inset:0;width:100%;height:100%;overflow:visible;fill:none;pointer-events:none}.label-leaders g{opacity:0;--leader-color:var(--accent)}.label-leaders [data-connection=gas],.label-leaders [data-connection=heat]{--leader-color:var(--flow)}.label-leaders [data-connection=electricity]{--leader-color:var(--blue)}.label-leaders path{stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}.leader-underlay{stroke:var(--bg);stroke-width:6;opacity:1}.leader-line{stroke:var(--leader-color);stroke-width:2}.leader-ring{stroke:var(--leader-color);stroke-width:2;fill:var(--bg)}.leader-dot{fill:var(--leader-color);stroke:none}.fallback-details{padding:50px var(--gutter);display:grid;grid-template-columns:1fr 1fr;gap:45px;background:var(--bg)}.fallback-details h2{font-size:2rem;margin-bottom:16px}.story.fallback{height:auto}.story.fallback .stage{position:relative;height:auto;min-height:900px}.story.fallback .stage-bottom{display:none}.static-story{height:auto}.static-story .stage{position:relative;top:0;height:720px}.static-story .stage-nav,.static-story .play-button{display:none}
/* Photo evidence and explanatory tools each get their own rhythm. */
.reality{border-top:1px solid var(--line)}.photo img{width:100%;aspect-ratio:1.8;object-fit:cover}.photo figcaption{margin-top:14px}.wide-photo img{aspect-ratio:1.8;object-position:50% 55%}.farm-section{background:var(--surface)}.calculator-controls{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:24px}.power-comparison{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(15px,5vw,80px);height:290px;align-items:end;margin:45px 0 34px}.power-column{height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:10px}.bar-value{font-size:2rem;font-weight:500;letter-spacing:-.04em}.bar-value small{font-size:1rem;font-weight:450}.power-bar{display:block;height:calc(220px * var(--power));width:100%;max-width:155px;background:color-mix(in srgb,var(--accent) 40%,var(--surface));border-radius:8px 8px 0 0;border:1px solid var(--accent)}.power-column[data-selected=true] .power-bar,.power-column[aria-current=true] .power-bar{background:var(--accent)}.ceiling-result{padding:32px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:32px;align-items:start}.ceiling-result h3{max-width:450px}.ceiling-result .formula{font-size:1rem;margin:12px 0}.ceiling-result output{font-size:clamp(2.5rem,5vw,4.5rem);line-height:1.15;letter-spacing:-.05em;white-space:nowrap}.ceiling-result output small{font-size:1.125rem}.calculator>.button{margin-top:28px}.form-status{min-height:1.5em;margin-top:12px;font-size:.875rem}.daily-section{display:grid;grid-template-columns:1.4fr 1fr;gap:7%;align-items:center}.daily-photo img{aspect-ratio:1.05;object-position:50% 50%}.daily-copy h2{margin-bottom:30px}.daily-copy p{color:var(--muted)}.daily-copy a{margin-top:25px}.heat-section{padding-top:20px}.heat-layout{display:grid;grid-template-columns:1fr 1.3fr;gap:12%;align-items:center}.segmented{display:flex;border:1px solid var(--line);border-radius:28px;padding:4px;width:max-content;max-width:100%}.segmented button{min-width:100px;padding:8px 20px;border-radius:25px;font-size:1rem;line-height:1.5}.segmented button[aria-pressed=true]{background:var(--button);color:var(--button-ink)}.season-control p{margin-top:24px;color:var(--muted)}.heat-diagram{display:flex;align-items:center;gap:0}.heat-source{border:2px solid var(--flow);border-radius:50%;width:115px;height:115px;display:grid;place-items:center;text-align:center;font-size:1.1rem;flex-shrink:0;padding:12px}.heat-routes{flex:1;display:flex;flex-direction:column;gap:30px;position:relative;border-left:2px solid var(--flow);margin-left:35px}.heat-routes:before{content:'';position:absolute;left:-37px;top:50%;height:2px;width:36px;background:var(--flow)}.heat-routes>div{display:flex;align-items:center;gap:16px;min-height:60px}.heat-line{height:2px;background:var(--flow);width:44px;flex-shrink:0}.heat-routes p{font-size:1rem}.heat-diagram[data-season-diagram=summer] .seasonal-route .heat-line{background:repeating-linear-gradient(to right,var(--flow) 0 8px,transparent 8px 13px)}.journey{background:var(--surface)}.journey>h2{max-width:700px;margin-bottom:54px}.journey ol{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(5,1fr);gap:25px}.journey li{position:relative;border-top:1px solid var(--line);padding-top:24px}.journey li>span{font-size:.875rem;color:var(--muted)}.journey h3{margin:25px 0 14px}.journey p{font-size:1rem;color:var(--muted)}.closing{display:grid;grid-template-columns:1.3fr 1fr;gap:12%;align-items:start}.closing h2{font-size:clamp(2.8rem,5vw,5rem)}.closing p{color:var(--muted);margin-bottom:26px}
/* Topic pages build on the same language without repeating the home hero. */
.page-intro{padding-top:clamp(60px,8vw,130px);display:grid;grid-template-columns:1.2fr 1fr;gap:10%;align-items:start}.page-intro h1{max-width:800px}.page-intro>p{color:var(--muted);padding-top:12px}.topic-section{display:grid;grid-template-columns:1fr 1fr;gap:5% 9%;border-top:1px solid color-mix(in srgb,var(--line) 40%,transparent)}.topic-copy h2{font-size:clamp(2.1rem,3.5vw,3.8rem);margin-bottom:25px}.topic-copy p{color:var(--muted)}.topic-section:not(.with-image):not(.has-items) .topic-copy{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:16px 9%}.topic-section:not(.with-image):not(.has-items) h2{grid-row:1/5}.topic-section:not(.with-image):not(.has-items) p{grid-column:2;margin:0}.topic-section:not(.with-image):not(.has-items) .source-links{grid-column:2;margin-top:10px}.topic-items{display:flex;flex-direction:column;gap:28px}.topic-items article{border-bottom:1px solid var(--line);padding-bottom:22px}.topic-items p{margin-top:12px;font-size:1rem;color:var(--muted)}.topic-section.with-image.has-items .topic-items{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr)}.topic-section .photo img{aspect-ratio:1.3}.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:30px;padding-top:10px}.gallery-item{display:block}.gallery-item:nth-child(3n){grid-column:1/-1}.gallery-item .photo img{aspect-ratio:1.6}.lightbox{border:0;background:var(--bg);color:var(--ink);padding:60px 20px 20px;max-width:96vw;max-height:94dvh;width:max-content;border-radius:8px}.lightbox::backdrop{background:#071012df}.lightbox img{object-fit:contain;max-width:90vw;max-height:75dvh}.lightbox p{font-size:1rem;margin-top:15px}.lightbox-close{position:absolute;right:12px;top:8px;font-size:2rem}.faq{padding-top:20px}.faq details,.source-table{border-top:1px solid var(--line);padding:23px 0}.faq summary,.source-table summary{cursor:pointer;min-height:44px;font-size:1.25rem;font-weight:540;line-height:1.5;padding-right:22px}.faq details p{margin:20px 0 10px;color:var(--muted)}.farm-inputs{margin-top:45px}.farm-inputs>.field-grid{margin:26px 0}.field-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:25px}.farm-inputs textarea{margin:20px 0}.source-table{margin-top:50px}.source-table>p{font-size:.875rem;margin-top:18px}.table-scroll{overflow:auto;margin:25px 0;width:100%;border:1px solid var(--line)}table{border-collapse:collapse;min-width:940px;width:100%;font-size:.875rem}caption{text-align:left;padding:14px;font-size:1rem;font-weight:550}td,th{text-align:left;vertical-align:top;border-top:1px solid var(--line);padding:12px}thead th{background:var(--surface)}td:nth-last-child(-n+2){min-width:175px}.cell-note{display:block;line-height:1.45;margin-top:10px;font-weight:normal}.contact-main{display:grid;grid-template-columns:.8fr 1.2fr;gap:10%;padding-top:15px}.contact-prompt{min-width:0}.contact-prompt h2{font-size:2.7rem;margin-bottom:24px}.contact-prompt p{color:var(--muted);margin-bottom:25px}.contact-prompt>a{display:block;overflow-wrap:anywhere;margin-top:12px;font-size:clamp(1.125rem,2vw,1.5rem);min-height:44px}.inquiry>.field-grid{margin-bottom:25px}.inquiry>p{margin:20px 0}.inquiry>.button{margin-top:8px}.inquiry-preview{margin-top:30px}.inquiry-preview .action-row{margin-top:18px}
.site-footer{background:var(--surface);padding:60px var(--gutter) 25px}.footer-top{display:flex;justify-content:space-between;gap:30px;align-items:start;padding-bottom:50px;border-bottom:1px solid var(--line)}.footer-contact{display:flex;flex-direction:column;gap:10px}.footer-contact a{font-size:clamp(1.4rem,2.6vw,2.5rem);line-height:1.3;min-height:44px}.back-top{display:flex;align-items:center;gap:20px;min-height:44px;font-size:.875rem}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:8%;padding:40px 0}.footer-grid p{font-size:.875rem;line-height:1.8}.footer-grid nav{display:flex;flex-direction:column;gap:1px;font-size:.875rem}.footer-grid nav>a{display:flex;align-items:center;min-height:44px}.footer-label{font-weight:650;margin-bottom:15px}.footer-bottom{border-top:1px solid var(--line);padding-top:20px;display:flex;gap:30px;justify-content:space-between;align-items:center}.footer-bottom p{font-size:.875rem;color:var(--muted)}.noscript-languages{display:flex;flex-wrap:wrap;gap:12px 25px}.noscript-languages a{display:flex;align-items:center;min-height:44px}
@media(max-width:1200px){.main-nav{gap:15px}.site-header{gap:20px}.main-nav a{font-size:.875rem}.brand,.brand img{width:112px}.journey ol{gap:18px}.chapter-copy h1,.chapter-copy h2{font-size:3.1rem}.chapter-copy{width:37%}.chapter-copy p{font-size:1.125rem}.stage{min-height:750px}}
@media(max-width:1100px){.menu-toggle{display:grid}.main-nav{position:absolute;top:var(--header-height);left:0;right:0;background:var(--bg);padding:24px var(--gutter) 34px;display:none;max-height:calc(100dvh - var(--header-height));overflow-y:auto;border-bottom:1px solid var(--line)}.main-nav>a{font-size:1.5rem;min-height:58px;white-space:normal;display:flex}.main-nav>a:last-child{border:0;border-radius:0;padding:0}.preferences{margin-left:auto}:root[data-menu=open] .main-nav{display:flex;flex-direction:column;align-items:stretch;gap:8px}:root[data-menu=open] .open-icon{display:none}:root[data-menu=open] .close-icon{display:contents}.section-intro,.closing,.page-intro{gap:7%}.site-header{--gutter:24px}.journey ol{grid-template-columns:1fr 1fr}.journey li:last-child{grid-column:1/-1}.journey h3{margin-top:12px}}
@media(max-width:1000px){:root{--header-height:76px}.story{height:350svh}.stage{height:auto;min-height:calc(100svh - var(--header-height));display:grid;grid-template-rows:auto minmax(380px,1fr) auto;align-content:start;overflow:hidden}.scene{position:relative;inset:auto;grid-column:1;grid-row:2;min-height:380px;height:48svh}.chapter-copy{position:relative;inset:auto;grid-column:1;grid-row:1;width:auto;padding:25px var(--gutter) 0;display:grid;grid-template-columns:1.2fr 1fr;gap:10px 30px;align-items:start}.chapter-count{grid-column:1/-1;margin:0}.chapter-copy h1,.chapter-copy h2{font-size:2.6rem;grid-row:2/5}.chapter-copy p{font-size:1rem;margin:0;max-width:none;grid-column:2}.chapter-copy .concept-caption{font-size:.875rem;margin:0}.story-cta{grid-column:2;justify-self:start;margin:7px 0 0}.stage-bottom{position:relative;inset:auto;grid-column:1;grid-row:3;padding:0 var(--gutter) 20px;background:var(--bg)}.play-button{margin:0 0 4px}.stage-nav{gap:15px}.stage-nav button{font-size:.875rem;gap:8px;align-items:start}.model-label{font-size:.875rem;line-height:1.25;max-width:calc((100% - 48px)/2);padding:8px 10px 8px 12px}.poster img{height:94%;margin:0;width:94%;object-fit:contain}.story-status{bottom:5%;left:var(--gutter);right:auto}.static-story{height:auto}.static-story .stage{height:auto;min-height:0}.static-story .scene{height:55svh;min-height:400px}.static-story .chapter-copy{padding-top:0;padding-bottom:25px}.static-story .stage-bottom{padding:0}.topic-section{gap:30px 6%}.heat-layout{gap:7%}.heat-source{width:90px;height:90px;font-size:1rem}.heat-routes{margin-left:20px}.heat-routes:before{left:-22px;width:21px}.heat-line{width:25px}.contact-main{gap:6%}.ceiling-result{gap:24px}.footer-top{flex-wrap:wrap}.footer-top .back-top{margin-left:auto}}
@media(max-width:700px){:root{--header-height:70px;--gutter:22px}body{font-size:1rem;line-height:1.6}.site-header{padding:0 16px;gap:12px}.brand,.brand img{width:100px}.preferences{gap:2px}.language-toggle{width:54px;padding-inline:6px}.section{padding:60px var(--gutter)}h1{font-size:2.6rem}h2{font-size:2.4rem}h3{font-size:1.25rem}.section-intro,.closing,.page-intro{display:block}.section-intro h2{margin-bottom:24px}.section-intro{margin-bottom:28px}.section-intro a{margin-top:16px}.story{height:340svh}.stage{grid-template-rows:auto auto auto;min-height:calc(100svh - var(--header-height))}.chapter-copy{display:block;padding:20px var(--gutter) 0}.chapter-count{margin-bottom:8px}.chapter-copy h1,.chapter-copy h2{font-size:2.25rem;line-height:1.07;max-width:560px}.chapter-copy p{font-size:1rem;margin-top:12px;line-height:1.5;max-width:560px}.chapter-copy .concept-caption{font-size:.875rem;margin:8px 0 0}.story-cta{margin:16px 0 0;min-height:48px;padding:10px 18px}.scene{height:40svh;min-height:310px}.stage-bottom{padding:0 16px 16px}.stage-nav{gap:10px}.stage-nav button{display:flex;flex-direction:column;gap:5px;font-size:.875rem;line-height:1.25;padding-bottom:6px;min-height:68px}.play-button{font-size:.875rem;min-height:44px}.model-label{font-size:.875rem}.fallback-details{grid-template-columns:1fr;padding:35px var(--gutter)}.story.fallback .stage{min-height:0}.static-story .scene{min-height:350px;height:50svh}.photo img,.wide-photo img{aspect-ratio:1.25}.wide-photo img{object-position:48% 50%}.daily-section{display:flex;flex-direction:column;gap:28px}.daily-photo{width:100%}.daily-photo img{aspect-ratio:1.25}.daily-copy h2{margin-bottom:22px}.daily-copy a{margin-top:16px}.heat-section{padding-top:10px}.heat-layout{display:flex;flex-direction:column;gap:40px;align-items:stretch}.heat-source{width:86px;height:86px}.heat-routes{gap:15px}.heat-routes>div{gap:12px;min-height:65px}.journey ol{display:block}.journey li{display:flex;gap:24px;padding:25px 0}.journey li>span{min-width:25px}.journey h3{margin:0 0 10px}.closing h2{margin-bottom:26px;font-size:2.6rem}.closing p{margin-bottom:22px}.calculator-controls{gap:16px;grid-template-columns:1fr 1fr}.calculator-controls>label:first-child{grid-column:1/-1}.power-comparison{height:210px;gap:18px;margin:32px 0 25px}.power-bar{height:calc(145px * var(--power))}.bar-value{font-size:1.6rem}.bar-value small{font-size:.875rem}.ceiling-result{display:flex;flex-direction:column;padding:25px 0;gap:20px}.ceiling-result output{font-size:3rem}.ceiling-result h3{font-size:1.3rem}.field-grid{grid-template-columns:1fr;gap:20px}.page-intro{padding-top:45px}.page-intro>p{margin-top:25px;padding:0}.topic-section{display:block}.topic-section:not(.with-image):not(.has-items) .topic-copy{display:block}.topic-copy h2{font-size:2.2rem;margin-bottom:24px}.topic-section:not(.with-image):not(.has-items) p+p{margin-top:1.1em}.topic-section .photo{margin-top:28px}.topic-section.with-image.has-items .topic-items,.topic-items{display:flex;flex-direction:column;gap:24px;margin-top:32px}.gallery{padding-top:0;gap:18px;grid-template-columns:1fr}.gallery-item:nth-child(3n){grid-column:auto}.gallery-item .photo img{aspect-ratio:1.4}.faq{padding-top:0}.faq summary,.source-table summary{font-size:1.125rem}.contact-main{display:block;padding-top:0}.contact-prompt{margin-bottom:35px}.contact-prompt h2{font-size:2.3rem}.footer-top{display:grid;grid-template-columns:1fr auto;gap:28px;padding-bottom:30px}.footer-contact{grid-column:1/-1;grid-row:2}.footer-contact a{font-size:1.5rem}.footer-top .back-top{grid-column:2;grid-row:1;font-size:.875rem;gap:10px}.footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:30px 0}.footer-grid>div{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom button{margin-top:15px}.site-footer{padding:40px var(--gutter) 20px}.lightbox{padding-left:12px;padding-right:12px}.lightbox p{font-size:.875rem}}
@media(max-width:350px){:root{--gutter:16px}.site-header{padding:0 12px}.brand,.brand img{width:92px}.language-toggle{width:52px}.preferences{gap:0}.chapter-copy h1,.chapter-copy h2{font-size:2rem}.scene{min-height:280px;height:38svh}.stage-nav{gap:8px}.stage-nav button{font-size:.875rem}.button{gap:14px;padding-left:16px;padding-right:16px}.footer-contact a{font-size:1.25rem}.power-comparison{gap:14px}.heat-routes p{font-size:.875rem}}
:root[data-reduced=yes] .story{height:auto}:root[data-reduced=yes] .stage{position:relative;top:0}:root[data-reduced=yes] .play-button{display:none}
@media(max-height:680px){.story{height:auto}.stage{position:relative;top:0;height:auto;min-height:0;display:grid;grid-template-rows:auto auto auto}.chapter-copy{position:relative;inset:auto;width:auto;padding:30px var(--gutter);grid-row:1}.chapter-copy h1,.chapter-copy h2{max-width:650px}.scene{position:relative;inset:auto;grid-row:2;height:550px}.stage-bottom{position:relative;inset:auto;grid-row:3;padding:0 var(--gutter) 24px}.story-status{bottom:5%}.static-story .stage{height:auto}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media(prefers-color-scheme:dark){:root:not([data-theme]){color-scheme:dark;--bg:#101b1c;--ink:#e9efed;--muted:#b0c1b8;--surface:#1b2a28;--card:#152820;--line:#789487;--accent:#a1d2af;--blue:#79c8e9;--flow:#ffac72;--button:#79c8e9;--button-ink:#112a32}}
html:not(.js) .story{height:auto}html:not(.js) .stage{position:relative;top:0;min-height:900px}html:not(.js) [data-fallback-details]{display:grid!important}html:not(.js) .stage-bottom,html:not(.js) .story-status,html:not(.js) .theme-toggle,html:not(.js) .menu-toggle,html:not(.js) .language-control,html:not(.js) .motion-toggle{display:none}html:not(.js) .main-nav{display:flex;position:relative;top:auto;flex-wrap:wrap;max-height:none}html:not(.js) .site-header{height:auto;position:relative;flex-wrap:wrap;padding:15px var(--gutter)}html:not(.js) main{padding-top:0}

.energy-value{display:flex;align-items:baseline;gap:12px;white-space:nowrap}.energy-value>span{font-size:1.125rem}.story[data-load=fallback]{height:auto}.story[data-load=fallback] .stage{position:relative;top:0}.story[data-reduced=yes]{height:auto}.story[data-reduced=yes] .stage{position:relative;top:0}.static-story [data-fallback-details]{display:none!important}

.stage{grid-template-columns:minmax(0,1fr)}.chapter-copy,.stage-bottom,.scene,.stage-nav button{min-width:0}.story[data-tall=yes]{height:auto}.story[data-tall=yes] .stage{position:relative;top:0}
@media(max-width:700px){.scene{height:36svh;min-height:250px}.stage-nav button>span:last-child{overflow-wrap:normal}.static-story .scene{min-height:350px;height:50svh}}

@media(prefers-color-scheme:dark){:root:not([data-theme]) .logo-light{display:none}:root:not([data-theme]) .logo-dark{display:block}}

/* Farm information comes before the optional arithmetic comparison. */
.comparator-title{font-size:1.5rem;line-height:1.3;margin-bottom:28px;letter-spacing:-.025em}
.full-calculator>.farm-inputs{margin-top:0;margin-bottom:70px}
.full-calculator>.comparator-title{padding-top:35px;border-top:1px solid var(--line)}
.farm-heat-route>div{min-width:0}
.heat-receivers{border-left:2px solid var(--flow);margin:14px 0 0 4px;padding-left:17px;position:relative}
.heat-receivers p{font-size:1rem;line-height:1.5;color:var(--muted)}
.receiver-line{position:absolute;left:0;top:12px;width:10px;height:2px;background:var(--flow)}
.heat-diagram[data-season-diagram=summer] .heat-receivers{border-left-style:dashed}
@media(max-width:350px){.heat-source{width:70px;height:70px}.heat-routes{margin-left:12px}.heat-routes:before{left:-14px;width:13px}.heat-line{width:13px}.heat-routes>div{gap:9px}.heat-routes p,.heat-receivers p{font-size:1rem}}

.journey p,.topic-items p{font-size:1.125rem}
@media(max-width:700px){.journey p,.topic-items p{font-size:1rem}}

.story.static-story{height:auto}
.farm-balance{background:var(--surface)}
.farm-balance>h2{max-width:850px;margin-bottom:55px}
.balance-diagram{display:grid;grid-template-columns:1fr 1.5fr;align-items:center;max-width:1050px;margin:0 auto 50px}
.balance-source{border:2px solid var(--accent);border-radius:50%;width:190px;height:190px;display:grid;place-items:center;text-align:center;font-size:1.5rem;position:relative;justify-self:center}
.energy-routes{border-left:2px solid var(--accent);position:relative;display:flex;flex-direction:column;gap:30px}
.energy-routes:before{content:'';position:absolute;height:2px;background:var(--accent);width:calc(33.333% - 95px);left:calc(95px - 33.333%);top:50%}
.energy-routes>div{display:flex;align-items:center;gap:24px;padding:15px 0}
.energy-route-line{height:2px;width:50px;background:var(--accent);flex-shrink:0}
.energy-routes>div:last-child .energy-route-line{background:var(--flow)}
.energy-routes p{margin-top:8px;color:var(--muted)}
.balance-factors{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0;display:grid;grid-template-columns:1fr 2fr;gap:30px}
.balance-factors ul{display:grid;grid-template-columns:1fr 1fr;gap:15px 35px;margin:0;padding-left:22px}
.balance-explanation{display:grid;grid-template-columns:1fr 1fr;gap:8%;margin-top:35px;color:var(--muted)}
.balance-explanation p+p{margin-top:0}
.journey-note{display:grid;grid-template-columns:1fr 1fr;gap:8%;margin-top:50px;color:var(--muted)}
.journey-note p+p{margin-top:0}
@media(max-width:700px){.balance-diagram{grid-template-columns:90px 1fr;gap:30px;margin-bottom:35px}.balance-source{width:90px;height:90px;font-size:1rem}.energy-routes{gap:15px}.energy-routes:before{width:30px;left:-30px}.energy-routes>div{gap:12px}.energy-route-line{width:18px}.energy-routes h3{font-size:1.25rem}.energy-routes p{font-size:1rem}.balance-factors{display:block}.balance-factors ul{display:block;margin-top:20px}.balance-factors li+li{margin-top:12px}.balance-explanation,.journey-note{display:block}.balance-explanation p+p,.journey-note p+p{margin-top:1.1em}.farm-balance>h2{margin-bottom:35px}}

.page-intro h1{overflow-wrap:break-word;hyphens:auto}

.main-nav>a{min-width:44px}
.heat-routes p,.heat-receivers p{font-size:1.125rem}
@media(max-width:700px){.heat-routes p,.heat-receivers p{font-size:1rem}}

.button:disabled,.button[aria-disabled=true]{background:var(--surface);color:var(--muted);border-color:var(--line);filter:none}

/* A larger user font keeps content in normal flow with fewer columns. */
:root[data-text-expanded=yes] main,:root[data-text-expanded=yes] .site-footer{overflow-wrap:anywhere}
:root[data-text-expanded=yes] :is(.section-intro,.page-intro,.closing,.daily-section,.heat-layout,.contact-main,.topic-section,.topic-section:not(.with-image):not(.has-items) .topic-copy,.footer-grid,.field-grid,.calculator-controls,.balance-factors,.balance-explanation,.journey-note){display:grid;grid-template-columns:minmax(0,1fr);gap:28px}
:root[data-text-expanded=yes] :is(.topic-copy,.topic-items,.inquiry,.calculator,.journey li>div,.power-column){min-width:0}
:root[data-text-expanded=yes] .topic-section:not(.with-image):not(.has-items) :is(h2,p,.source-links){grid-row:auto;grid-column:auto}
:root[data-text-expanded=yes] :is(.topic-section.with-image.has-items .topic-items,.journey ol){display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,14rem),1fr));gap:32px}
:root[data-text-expanded=yes] .journey li:last-child{grid-column:auto}
:root[data-text-expanded=yes] .journey li{display:block}
:root[data-text-expanded=yes] .journey h3{margin-top:15px}
:root[data-text-expanded=yes] .ceiling-result{flex-direction:column}
:root[data-text-expanded=yes] .energy-value{flex-wrap:wrap;white-space:normal}
:root[data-text-expanded=yes] .ceiling-result output{white-space:normal;overflow-wrap:anywhere}
:root[data-text-expanded=yes] .power-comparison{height:auto;align-items:end;grid-template-columns:repeat(auto-fit,minmax(min(100%,6rem),1fr));row-gap:32px}
:root[data-text-expanded=yes] .bar-value{line-height:1.3}
:root[data-text-expanded=yes] .bar-value small{display:block}
:root[data-text-expanded=yes] .balance-diagram{grid-template-columns:minmax(0,1fr);gap:30px}
:root[data-text-expanded=yes] .balance-source{width:7rem;height:7rem;font-size:1.2rem;padding:14px}
:root[data-text-expanded=yes] .energy-routes{min-width:0;margin-left:16px}
:root[data-text-expanded=yes] .energy-routes:before{left:0;top:-30px;width:2px;height:30px}
:root[data-text-expanded=yes] .energy-routes>div{gap:12px}
:root[data-text-expanded=yes] .energy-route-line{width:18px}
:root[data-text-expanded=yes] .balance-factors ul{grid-template-columns:minmax(0,1fr)}
:root[data-text-expanded=yes] .heat-diagram{flex-direction:column;align-items:stretch;gap:30px}
:root[data-text-expanded=yes] .heat-source{align-self:center;width:6rem;height:6rem}
:root[data-text-expanded=yes] .heat-routes{margin-left:16px}
:root[data-text-expanded=yes] .heat-routes:before{left:-2px;top:-30px;width:2px;height:30px}
:root[data-text-expanded=yes] .heat-line{width:18px}
:root[data-text-expanded=yes] .segmented{flex-wrap:wrap}
:root[data-text-expanded=yes] .footer-top{display:flex;flex-wrap:wrap}
:root[data-text-expanded=yes] .footer-contact{min-width:0;max-width:100%}
:root[data-text-expanded=yes] .footer-grid>div{grid-column:auto}
:root[data-text-expanded=yes] .footer-bottom{display:block}
:root[data-text-expanded=yes] .menu-toggle{display:grid}
:root[data-text-expanded=yes] .site-header{gap:12px}
:root[data-text-expanded=yes] .brand,:root[data-text-expanded=yes] .brand img{width:80px}
:root[data-text-expanded=yes] .preferences{margin-left:auto;gap:0}
:root[data-text-expanded=yes] .language-toggle{width:84px}
:root[data-text-expanded=yes] .main-nav{position:absolute;top:var(--header-height);left:0;right:0;background:var(--bg);padding:24px var(--gutter) 34px;display:none;max-height:calc(100dvh - var(--header-height));overflow-y:auto;border-bottom:1px solid var(--line)}
:root[data-text-expanded=yes] .main-nav>a{font-size:1rem;min-height:58px;white-space:normal;display:flex}
:root[data-text-expanded=yes] .main-nav>a:last-child{border:0;border-radius:0;padding:0}
:root[data-text-expanded=yes][data-menu=open] .main-nav{display:flex;flex-direction:column;align-items:stretch;gap:8px}
:root[data-text-expanded=yes][data-menu=open] .open-icon{display:none}
:root[data-text-expanded=yes][data-menu=open] .close-icon{display:contents}

/* Scene accessibility for enlarged root text; normal typography stays unchanged. */
:root[data-text-expanded=yes] .story{height:auto}
:root[data-text-expanded=yes] .stage{position:relative;top:0;height:auto;min-height:0;display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto auto;overflow:hidden}
:root[data-text-expanded=yes] .chapter-copy{position:relative;inset:auto;grid-column:1;grid-row:1;width:auto;display:block;padding:1rem var(--gutter) .75rem}
:root[data-text-expanded=yes] .chapter-copy h1,:root[data-text-expanded=yes] .chapter-copy h2{max-width:none}
:root[data-text-expanded=yes] .chapter-copy p{max-width:65ch;margin-top:.6rem}
:root[data-text-expanded=yes] .chapter-copy .concept-caption{margin-top:.4rem}
:root[data-text-expanded=yes] .chapter-count{margin-bottom:.4rem}
:root[data-text-expanded=yes] .story-cta{max-width:100%;white-space:normal;flex-wrap:wrap;margin-top:.7rem}
:root[data-text-expanded=yes] .scene{position:relative;inset:auto;grid-column:1;grid-row:2;height:clamp(24rem,70svh,34rem);min-height:24rem}
:root[data-text-expanded=yes] .stage-bottom{position:relative;inset:auto;grid-column:1;grid-row:3;padding:1rem var(--gutter)}
:root[data-text-expanded=yes] .play-button{max-width:100%;align-items:flex-start;white-space:normal}
:root[data-text-expanded=yes] .stage-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem 1rem}
:root[data-text-expanded=yes] .stage-nav button{min-width:0;flex-direction:row;flex-wrap:wrap;gap:.4rem;overflow-wrap:anywhere;hyphens:auto}
:root[data-text-expanded=yes] .model-label{max-width:calc((100% - 48px)/2)}
:root[data-text-expanded=yes] .static-story .stage-bottom{display:none}

:root[data-text-expanded=yes] .model-label{overflow-wrap:anywhere;hyphens:auto}
:root[data-text-expanded=yes] .chapter-copy h1,:root[data-text-expanded=yes] .chapter-copy h2{overflow-wrap:anywhere;hyphens:auto}