.steam-reading>.coil-recall{--recall-motion:140ms;--recall-ease:ease-out;margin-top:48px;padding-top:32px;border-top:1px solid var(--steam-line,#d5d8d4);scroll-margin-top:32px;font-family:Inter,Arial,sans-serif;letter-spacing:-.04em}.coil-recall>h2{color:#e52d00}.steam-reading .coil-recall-intro{margin-bottom:28px;font-size:17px;line-height:1.6}.coil-recall-frame{padding:32px;border:1px solid var(--steam-line,#d5d8d4);border-radius:6px;background:#f6f6f2;min-width:0}.steam-reading .coil-recall-progress{font-size:14px;line-height:1.5;color:var(--steam-muted,#595f60);margin:0 0 24px}.coil-recall-panels{display:grid;min-width:0}.coil-recall-panel{grid-area:1/1;visibility:hidden;min-width:0;pointer-events:none}.coil-recall-panel[data-active=true]{visibility:visible;pointer-events:auto}.steam-reading .coil-recall-panel h3{text-transform:none;margin:0 0 20px;font:600 28px/1.25 Inter,Arial,sans-serif;letter-spacing:-.04em;overflow-wrap:anywhere}.coil-recall-panel h3:focus{outline:none}.steam-article .coil-recall-button{display:inline-flex;align-items:center;justify-content:center;gap:4px;min-height:44px;max-width:100%;padding:10px 20px;border:1px solid transparent;border-radius:6px;font:600 16px/1.4 Inter,Arial,sans-serif;letter-spacing:-.04em;text-decoration:none;cursor:pointer;text-align:center;overflow-wrap:anywhere;touch-action:manipulation;transition:background-color var(--recall-motion) var(--recall-ease),border-color var(--recall-motion) var(--recall-ease)}.coil-recall .coil-recall-primary{background:#e52d00;color:#fff}.coil-recall .coil-recall-secondary{border-color:#232e33;background:transparent;color:#232e33}.coil-recall-button:disabled{background:#e4e4e4;border-color:transparent;color:#727778;cursor:default}.coil-recall-answer{visibility:hidden;margin-top:20px;font-size:17px;line-height:1.75;min-width:0}.coil-recall-panel[data-active=true] .coil-recall-answer[data-revealed=true]{visibility:visible;animation:recall-answer-in var(--recall-motion) var(--recall-ease)}.steam-reading .coil-recall-answer p{margin-bottom:12px}.coil-recall-answer a,.coil-recall-back,.coil-recall-return{display:inline-flex;align-items:center;min-height:44px;max-width:100%;text-underline-offset:4px;overflow-wrap:anywhere}.coil-recall-return{margin-bottom:12px;font-size:14px}.coil-recall-navigation{display:flex;align-items:stretch;justify-content:space-between;gap:12px;margin-top:32px;padding-top:16px;border-top:1px solid var(--steam-line,#d5d8d4)}.coil-recall-navigation>*{flex:0 1 auto;min-width:0}.coil-recall-back{margin-top:12px;font-size:15px}.coil-recall-complete p{max-width:55ch}@keyframes recall-answer-in{0%{opacity:0}to{opacity:1}}@media(hover:hover){.coil-recall-primary:hover{background:#c92700}.coil-recall-secondary:not(:disabled):hover{background:#eaeae5}}@media(max-width:680px){.steam-reading>.coil-recall{margin-top:36px;padding-top:24px}.coil-recall-frame{padding:20px}.steam-reading .coil-recall-intro{font-size:16px;margin-bottom:24px}.steam-reading .coil-recall-panel h3{font-size:24px}.coil-recall-answer{font-size:16px}.coil-recall-navigation{gap:10px;margin-top:24px}.coil-recall-navigation>*{flex:1 1}.steam-article .coil-recall-button{font-size:15px;padding:10px 14px}}@media(max-width:360px){.coil-recall-frame{padding:16px}.coil-recall-navigation{flex-wrap:wrap}.coil-recall-navigation>*{flex:1 1 110px}}@media(prefers-reduced-motion:reduce){.coil-recall .coil-recall-button{transition:none}.coil-recall .coil-recall-answer{animation:none!important}}@media print{.coil-recall,.coil-recall-return{display:none!important}}.pageglide-metadata{display:flex;align-items:flex-start;flex-wrap:wrap;gap:8px 24px}.pageglide-metadata>.steam-byline{padding-block:11px}.pageglide{--pageglide-duration:160ms;--pageglide-ease:ease-out;min-width:0;max-width:100%;padding-left:24px;border-left:1px solid var(--steam-line,#d5d8d4);font-family:Inter,Arial,sans-serif;letter-spacing:-.04em}.steam-article .pageglide-control{display:flex;align-items:center;gap:12px;min-height:44px;max-width:100%;padding:0;border:0;border-radius:6px;background:transparent;color:var(--steam-ink,#232e33);font:600 14px/1.5 Inter,Arial,sans-serif;letter-spacing:-.04em;cursor:pointer;text-align:start;touch-action:manipulation}.pageglide-track{display:block;flex:none;width:44px;height:26px;border-radius:999px;background:#73797a;transition:background-color var(--pageglide-duration) var(--pageglide-ease)}.pageglide-thumb{display:block;width:20px;height:20px;margin:3px;border-radius:50%;background:white;transform:translateX(0);transition:transform var(--pageglide-duration) var(--pageglide-ease)}.pageglide-control[aria-checked=true] .pageglide-track{background:#e52d00}.pageglide-control[aria-checked=true] .pageglide-thumb{transform:translateX(18px)}.pageglide-hint{display:block;max-width:30ch;color:var(--steam-muted,#595f60);font-size:12px;line-height:1.5;overflow-wrap:anywhere}.steam-reading .pageglide-prefix{font-weight:700}@media(max-width:680px){.pageglide-metadata{gap:8px 16px}.pageglide{padding-left:16px}.steam-article .pageglide-control{font-size:13px}}@media(max-width:480px){.pageglide-metadata{flex-direction:column;gap:0}.pageglide-metadata>.steam-byline{padding-block:0}.pageglide{padding-left:0;border-left:0;margin-top:8px}}@media(prefers-reduced-motion:reduce){.pageglide-thumb,.pageglide-track{transition:none}}@media print{.pageglide{display:none}.steam-reading .pageglide-prefix{font-weight:inherit}}.steam-article{--steam-ink:#232e33;--steam-muted:#595f60;--steam-line:#d5d8d4;--steam-paper:#f6f6f2;--steam-fast:150ms;--steam-ease:ease-out;color:var(--steam-ink);font-family:Inter,Arial,sans-serif;letter-spacing:-.04em;padding-block:36px 88px;min-width:0}.steam-article *{box-sizing:border-box}.steam-article a{color:inherit;text-underline-offset:4px;text-decoration-thickness:1px}.steam-article a:focus-visible,.steam-article button:focus-visible,.steam-table-wrap:focus-visible{outline:2px solid var(--steam-ink);outline-offset:4px;border-radius:6px}.steam-article-top{display:flex;justify-content:space-between;gap:16px 28px;flex-wrap:wrap;font-size:14px;line-height:1.5;margin-bottom:40px}.steam-article-top>a{display:inline-flex;align-items:center;min-height:44px;gap:4px}.steam-article-top nav{display:flex;gap:20px;align-items:center;flex-wrap:wrap}.steam-article-top nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--steam-muted);text-decoration:none}.steam-article-top nav a[aria-current=page]{color:var(--steam-ink);text-decoration:underline}.steam-article-hero{display:grid;grid-template-columns:minmax(0,1fr) 200px;align-items:center;grid-gap:48px;gap:48px;max-width:1080px;margin:0 auto 48px;padding-bottom:40px;border-bottom:1px solid var(--steam-line)}.steam-eyebrow{margin:0 0 20px;font-size:13px;line-height:1.5;color:var(--steam-muted)}.steam-article h1{font-family:Coil,Impact,sans-serif;font-size:48px;font-weight:700;line-height:1.08;letter-spacing:0;text-transform:uppercase;margin:0 0 12px;overflow-wrap:anywhere}.steam-deck{font-size:18px;line-height:1.55;max-width:650px;margin:0 0 24px;color:var(--steam-muted)}.steam-byline{display:flex;gap:8px;flex-wrap:wrap;font-size:14px;line-height:1.5;margin:0;color:var(--steam-muted)}.steam-article-hero img{width:100%;height:auto;display:block;aspect-ratio:2/3;object-fit:contain}.steam-article-hero>.academy-cover{width:100%}.steam-reading{max-width:760px;margin-inline:auto;min-width:0;font-size:17px;line-height:1.75}.steam-reading p{margin:0 0 20px}.steam-reading .steam-lead{font-size:21px;line-height:1.6}.steam-takeaway{border-left:3px solid #e52d00;background:var(--steam-paper);padding:20px 24px;margin-block:28px 36px;border-radius:0 6px 6px 0}.steam-takeaway p{margin:0;font-size:17px;line-height:1.65;font-weight:500}.steam-reading h2{font-family:Coil,Impact,sans-serif;font-size:32px;line-height:1.2;font-weight:700;letter-spacing:0;text-transform:uppercase;overflow-wrap:anywhere;margin:0 0 12px}.steam-toc{padding:24px;border:1px solid var(--steam-line);border-radius:6px;margin-bottom:48px}.steam-toc h2{font-family:Inter,Arial,sans-serif;font-size:16px;line-height:1.5;text-transform:none;letter-spacing:-.04em;font-weight:600;margin:0 0 12px}.steam-toc ol{list-style:decimal-leading-zero;padding-left:28px;margin:0;column-count:2;column-gap:32px;font-size:15px}.steam-toc li{page-break-inside:avoid;break-inside:avoid;padding:4px 0;line-height:1.6}.steam-toc li::marker{color:var(--steam-muted)}.steam-reading>section{margin-top:48px;scroll-margin-top:160px}.steam-static-figure{margin:28px 0 0;min-width:0}.steam-static-figure img{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:3/2;object-fit:contain}.steam-static-figure figcaption{margin-top:12px;font-size:14px;line-height:1.6;color:var(--steam-muted);overflow-wrap:anywhere}.steam-art-viewport{position:relative;width:100%;aspect-ratio:3/2}.steam-art-viewport.is-cropped{overflow:hidden}.steam-art-viewport.is-cropped img{position:absolute;max-width:none;margin:0;pointer-events:none}.steam-explanations{display:grid;grid-gap:36px;gap:36px;margin-top:24px}.steam-explanation{min-width:0;scroll-margin-top:160px}.steam-explanation h3{font:600 20px/1.4 Inter,Arial,sans-serif;letter-spacing:-.04em;margin:0 0 12px;overflow-wrap:anywhere}.steam-explanation p:last-of-type{margin-bottom:0}.steam-explanation .steam-static-figure{max-width:620px;margin:20px auto 0}.steam-explanation .steam-static-detail{max-width:460px}@media(max-width:680px){.steam-explanations{gap:28px}.steam-explanation h3{font-size:18px}}@media print{.steam-static-figure{page-break-inside:avoid;break-inside:avoid}}.steam-table-wrap{overflow-x:auto;border:1px solid var(--steam-line);border-radius:6px;margin-top:24px;max-width:100%;overscroll-behavior-x:contain}.steam-article table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.6;table-layout:fixed;min-width:580px}.steam-article caption{text-align:left;font-weight:600;padding:16px;background:var(--steam-paper)}.steam-article td,.steam-article th{padding:16px;text-align:left;vertical-align:top;border-top:1px solid var(--steam-line);overflow-wrap:anywhere}.steam-article thead th{font-weight:600;background:var(--steam-paper)}.steam-article tbody th{font-weight:500;width:25%}.steam-checklist{margin:24px 0}.steam-checklist>div{border-top:1px solid var(--steam-line);padding:20px 0}.steam-checklist>div:last-child{border-bottom:1px solid var(--steam-line)}.steam-checklist dt{font-weight:600;line-height:1.5;margin-bottom:8px}.steam-checklist dd{margin:0;color:var(--steam-muted);font-size:16px;line-height:1.65}.steam-next{padding:28px;border:1px solid var(--steam-line);background:var(--steam-paper);border-radius:6px;margin-top:48px}.steam-next h2{font-size:28px}.steam-next>a{display:inline-block;max-width:100%;font-size:16px;line-height:1.5;min-height:48px;padding:12px 20px;background:var(--steam-ink);color:#fff;border-radius:6px;text-decoration:none;text-align:center}.steam-figure{margin:28px 0 0;padding:24px;border:1px solid var(--steam-line);border-radius:6px;background:var(--steam-paper);min-width:0}.steam-figure-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px}.steam-figure-head>span{font-size:12px;white-space:nowrap;color:var(--steam-muted)}.steam-figure h3{font:600 16px/1.5 Inter,Arial,sans-serif;letter-spacing:-.04em;margin:0;text-align:right}.steam-controls,.steam-steps{display:flex;gap:8px;flex-wrap:wrap}.steam-figure button{font:500 14px/1.5 Inter,Arial,sans-serif;letter-spacing:-.04em;min-height:44px;max-width:100%;border:1px solid #9aa19d;border-radius:6px;padding:10px 14px;background:#fff;color:var(--steam-ink);cursor:pointer;text-align:left;transition:background-color var(--steam-fast) var(--steam-ease),border-color var(--steam-fast) var(--steam-ease)}.steam-figure button[aria-pressed=true]{background:var(--steam-ink);border-color:var(--steam-ink);color:#fff}.steam-figure svg{display:block;width:100%;height:auto;margin:8px 0;overflow:visible}.steam-legend{display:flex;gap:8px 20px;flex-wrap:wrap;font-size:12px;line-height:1.5;margin-bottom:24px}.steam-legend span{display:inline-flex;align-items:center;gap:6px}.steam-legend span:before{content:"";display:block;flex-shrink:0;width:14px;height:3px;background:#c84723}.steam-legend .steam-key-water:before{height:8px;background:#507586}.steam-legend .steam-key-metal:before{width:10px;height:10px;border:1px solid #697773;background:#b3bab8}.steam-legend .steam-key-air:before{width:14px;height:2px;background:#626e6b}.steam-figure .steam-hint{font-size:13px;line-height:1.5;color:var(--steam-muted);margin-bottom:12px}.steam-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:8px;gap:8px}.steam-steps button{display:flex;align-items:baseline;gap:8px;min-width:0}.steam-steps button>span{font-size:11px;opacity:.8;letter-spacing:0}.steam-figure-readout{display:grid;margin-top:20px;border-top:1px solid var(--steam-line);padding-top:20px;font-size:15px;line-height:1.65}.steam-readout-panel{grid-area:1/1;visibility:hidden;min-width:0}.steam-readout-panel.is-active{visibility:visible}.steam-figure-readout strong{display:block;font-weight:600;margin-bottom:8px}.steam-figure .steam-figure-readout p{margin:0}.steam-figure figcaption{margin-top:16px;color:var(--steam-muted);font-size:12px;line-height:1.65}.steam-stage-actions{display:flex;align-items:center;min-height:44px;margin-top:12px}.steam-stage-actions .steam-replay{font-size:13px;padding:8px 12px;min-height:44px;background:transparent}.steam-replay[hidden]{display:none}.steam-reduced-hint{display:none;font-size:13px;line-height:1.5;color:var(--steam-muted)}.steam-section-scale,.steam-shell-panel,.steam-tube-camera{transition:transform .5s var(--steam-ease),opacity .25s var(--steam-ease)}.steam-coil-reference,.steam-component-landmarks,.steam-context-main,.steam-distributor,.steam-heat-transfer,.steam-route-overlay,.steam-water-film{transition:opacity .25s var(--steam-ease),transform .5s var(--steam-ease)}.steam-valve-stem{transition:transform .25s var(--steam-ease)}.steam-system-water-layer{transition:transform .7s var(--steam-ease)}.steam-coil-reference{pointer-events:none}.steam-scene-labels{display:grid;margin:0 0 24px;min-height:56px;font-size:13px;line-height:1.45}.steam-label-panel{grid-area:1/1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:12px;gap:12px;visibility:hidden;min-width:0}.steam-label-panel.is-active{visibility:visible}.steam-label-panel>span{border-top:2px solid #a3aaa5;padding-top:8px;min-width:0;overflow-wrap:anywhere}.steam-label-panel>span[data-kind=steam]{border-color:#E52D00}.steam-label-panel>span[data-kind=water]{border-color:#416f84}.steam-flow-dot{pointer-events:none}@media(max-width:680px){.steam-label-panel{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;font-size:13px}.steam-scene-labels{min-height:100px}.steam-coil-reference text{display:none}}@media(prefers-reduced-motion:reduce){.steam-coil-reference,.steam-component-landmarks,.steam-context-main,.steam-distributor,.steam-heat-transfer,.steam-route-overlay,.steam-section-scale,.steam-shell-panel,.steam-system-water-layer,.steam-tube-camera,.steam-valve-stem,.steam-water-film{transition:none!important}.steam-replay{display:none!important}.steam-reduced-hint{display:inline}}.steam-explorer{--steam-ease:cubic-bezier(.22,1,.36,1);--steam-reveal:500ms;--steam-fast:150ms}.steam-stage-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:8px;gap:8px}.steam-stage-buttons button{display:flex;gap:8px;align-items:baseline;min-width:0;padding:10px;font-size:13px;overflow-wrap:anywhere}.steam-stage-buttons button>span{font-size:11px;opacity:.8;letter-spacing:0;flex-shrink:0}.steam-figure button:disabled{cursor:default;opacity:.45}.steam-explorer .steam-hint{margin-top:12px}.steam-context-controls{display:grid;margin-top:20px}.steam-context-panel{grid-area:1/1;visibility:hidden;min-width:0}.steam-context-panel.is-active{visibility:visible}.steam-context-title{font-size:13px;font-weight:600;margin:0 0 8px!important;line-height:1.5}.steam-part-buttons{display:flex;gap:8px;flex-wrap:wrap}.steam-part-buttons button{display:flex;gap:6px;align-items:center;font-size:12px;padding:8px 10px;line-height:1.4}.steam-part-buttons button>span{width:18px;height:18px;display:grid;place-items:center;font-size:10px;border:1px solid;border-radius:50%;flex-shrink:0;letter-spacing:0}.steam-assembly{transition:opacity .25s var(--steam-ease)}.steam-explorer .steam-coil-scene,.steam-explorer .steam-system-scene{margin-top:12px;width:100%;max-width:100%;height:auto;overflow:hidden}.steam-explorer .steam-stage-count{font-size:12px;line-height:1.5;color:var(--steam-muted);margin:0}.steam-system-key{list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:10px 20px;gap:10px 20px;padding:0;margin:0 0 20px;font-size:13px;line-height:1.5}.steam-system-key li{display:flex;gap:8px;align-items:center;min-width:0}.steam-system-key li>span{width:22px;height:22px;display:grid;place-items:center;border:1px solid #7d8c80;border-radius:50%;font-size:11px;flex-shrink:0}@media(min-width:1100px){.steam-explorer{width:calc(100% + 120px);margin-left:-60px;padding:28px}}@media(max-width:680px){.steam-context-panel .steam-controls,.steam-part-buttons,.steam-stage-buttons{grid-template-columns:repeat(2,minmax(0,1fr))}.steam-part-buttons{display:grid;grid-gap:6px;gap:6px}.steam-part-buttons button{font-size:12px;padding:8px}.steam-system-key{gap:10px;font-size:12px}.steam-figure-readout{min-height:0}.steam-landmarks text{font-size:15px}}@media(prefers-reduced-motion:reduce){.steam-assembly{transition:none}}@media print{.steam-context-controls,.steam-stage-actions,.steam-stage-buttons{display:none}.steam-explorer{width:100%;margin-left:0}}@media(max-width:900px){.steam-article-hero{grid-template-columns:minmax(0,1fr) 150px;gap:28px}.steam-article-top{margin-bottom:28px}}@media(max-width:680px){.steam-article{padding-block:24px 56px}.steam-article h1{font-size:28px}.steam-article-hero{grid-template-columns:minmax(0,1fr);gap:24px;margin-bottom:32px;padding-bottom:28px}.steam-article-hero img{width:120px;justify-self:start}.steam-eyebrow{margin-bottom:16px}.steam-deck{font-size:16px;margin-bottom:20px}.steam-byline{font-size:13px}.steam-reading{font-size:16px;line-height:1.75}.steam-reading .steam-lead{font-size:19px}.steam-reading h2{font-size:22px}.steam-reading>section{margin-top:36px}.steam-takeaway{padding:16px 20px}.steam-takeaway p{font-size:16px}.steam-toc{padding:20px;margin-bottom:36px}.steam-toc ol{column-count:1}.steam-figure{padding:16px}.steam-figure-head{gap:12px}.steam-figure h3{font-size:15px}.steam-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.steam-controls button{font-size:13px;padding:10px;min-width:0;overflow-wrap:anywhere}.steam-steps{grid-template-columns:minmax(0,1fr)}.steam-steps button{width:100%}.steam-next{padding:20px}.steam-next h2{font-size:22px}.steam-article-top{font-size:13px}.steam-article-top nav{gap:16px}}@media(prefers-reduced-motion:reduce){.steam-figure button{transition:none}}@media(max-width:680px){.steam-article-hero>.academy-cover{width:min(100%,200px);justify-self:start;margin-inline:0}}@media print{.steam-article-top,.steam-controls,.steam-hint,.steam-next>a,.steam-steps{display:none}.steam-article{padding:0}.steam-article-hero{grid-template-columns:1fr 100px}.steam-reading{max-width:none}.steam-figure{page-break-inside:avoid;break-inside:avoid}.steam-toc{display:none}}.academy-article-end{margin-top:48px;padding-top:24px;border-top:1px solid var(--steam-line)}.academy-article-end>a{display:inline-flex;align-items:center;min-height:44px;max-width:100%;overflow-wrap:anywhere}