@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&family=Noto+Sans+JP:wght@400;500;600;700&display=swap');
:root{font-family:'DM Sans','Noto Sans JP',sans-serif;color:#142d38;background:#f4f7f8;font-synthesis:none;--cold:#007f93;--hot:#c8572d;--line:#d8e2e6}*{box-sizing:border-box}body{margin:0}button,input,a{-webkit-tap-highlight-color:transparent}button,a,input{touch-action:manipulation}button{font:inherit;cursor:pointer}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #d05e2e;outline-offset:4px}button{border:1px solid var(--line);background:#fff;border-radius:7px;padding:10px 14px;color:inherit;min-height:44px}button:hover{background:#eaf3f5}button[aria-pressed=true],button.active{background:#123541;color:white;border-color:#123541}h1,h2,h3,p{margin:0}h1,h2,h3{font-family:'Manrope','Noto Sans 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0}.bar-caption{display:flex;justify-content:space-between;font-size:14px;margin-bottom:7px}.bar-track{height:20px;background:#edf2f4;border-radius:3px;overflow:hidden}.bar{height:100%;background:var(--cold);transition:width .25s}.bar.warm{background:var(--hot)}.bar.work{background:#647a85}.equation{font-size:20px;margin:27px 0 10px;font-family:Manrope,sans-serif;letter-spacing:-.02em}.model-note{font-size:13px!important;color:#5a6d77!important;line-height:1.7!important}.chart-wrap{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px}.chart-header{display:flex;justify-content:space-between;align-items:center;gap:24px}.chart-header p{font-size:14px;color:#536c77}.chart{width:100%;height:auto;display:block;margin-top:20px}.chart text{font-family:inherit;font-size:13px;fill:#526c77}.chart-legend{display:flex;gap:22px;font-size:13px;flex-wrap:wrap}.chart-legend span:before{content:'';display:inline-block;width:20px;height:3px;background:var(--cold);vertical-align:middle;margin-right:7px}.chart-legend span+span:before{height:10px;background:#c8e1e6}.grid-three{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.article{border-top:2px solid #adc5cd;padding-top:20px}.article h3{margin-bottom:13px}.article p{color:#516872}.article .tag{font-size:12px;color:var(--cold);font-weight:700;margin-bottom:8px;letter-spacing:.1em}.qa{border-top:1px solid var(--line)}details{padding:19px 0;border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:600;font-size:18px;line-height:1.5}details p{padding-top:15px;max-width:900px;color:#506772}.sources{display:grid;grid-template-columns:1fr 1fr;gap:28px}.sources li{font-size:14px;line-height:1.65;margin-bottom:10px}.sources h3{margin-bottom:14px}.sources ul{padding-left:20px}.footer{max-width:1182px;margin:55px auto 0;padding:26px 0 35px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:22px;font-size:13px;color:#58727e}.fallback{position:absolute;inset:100px 25px 70px;display:grid;place-content:center;text-align:center;gap:14px}.skip{position:absolute;left:20px;top:-100px;background:white;padding:10px;z-index:99}.skip:focus{top:5px}@media(min-width:1500px){.viewport{height:640px}}@media(max-width:900px){header{padding:18px 24px}nav a:not(.language){display:none}.intro{align-items:start}.intro p{max-width:330px}.experience{margin:0 20px;grid-template-columns:minmax(0,1fr) 290px}.viewport{height:570px}.side{padding:20px}.cycle-tabs{margin:12px 20px 0}.cycle-tabs button{padding:12px;gap:8px}.flow-panel{gap:20px}.lab{grid-template-columns:290px 1fr}.readout strong{font-size:28px}.sliders,.lab-result{padding:22px}}@media(max-width:650px){header{padding:17px 20px}.brand span{display:none}.intro{display:block;margin:26px auto 22px;padding:0 20px}.intro p{max-width:none;margin-top:14px}.intro .eyebrow{margin-top:0}.experience{display:block;margin:0 14px}.viewport{height:410px}.view-tools{top:12px;left:12px;gap:5px}.view-tools button{font-size:12px;padding:6px 9px}.view-note{font-size:11px;left:12px;bottom:12px;max-width:70%}.canvas-badge{right:12px;font-size:11px}.side{border-left:0;border-top:1px solid var(--line);padding:22px}.side h2{margin:8px 0;font-size:26px}.side-controls{margin-top:5px}.phase{margin:15px 0}.cycle-tabs{grid-template-columns:1fr 1fr;margin:10px 14px 0;gap:6px}.cycle-tabs button{font-size:14px}.section{padding:48px 20px 0}.section-heading{display:block;margin-bottom:22px}.section-heading>p{margin-top:16px}.flow-panel,.lab{display:block}.flow-panel{padding:18px}.facts{margin-top:25px}.sliders{border-right:0;border-bottom:1px solid var(--line)}.readouts{gap:10px}.readout strong{font-size:27px}.readout small{font-size:12px}.lab-result{padding:22px}.grid-three,.sources{grid-template-columns:1fr;gap:26px}.chart-wrap{padding:15px}.chart-header{display:block}.chart-header button{margin-top:15px}.chart{margin-left:-5px;width:calc(100% + 10px)}.footer{margin:40px 20px 0;display:block}.footer span{display:block;margin-top:10px}.equation{font-size:18px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}} 

@media(max-width:650px){.flow-svg text{font-size:22px}.flow-svg .tiny{font-size:19px}}

/* 3D stage: studio backdrop, labels with leader lines, flow legend */
.viewport{background:#e6e5e2;isolation:isolate;height:auto;min-height:575px}
@media(min-width:1500px){.viewport{min-height:640px}}@media(max-width:900px){.viewport{min-height:570px}}@media(max-width:650px){.viewport{height:430px;min-height:0}}
.viewport canvas{position:relative;z-index:0}
.view-tools,.view-note,.canvas-badge{z-index:3}
.view-tools button{box-shadow:0 1px 3px rgba(20,40,50,.08)}
.view-note,.canvas-badge{background:rgba(230,229,226,.85);padding:3px 7px;border-radius:5px}
.scene-labels{position:absolute;inset:0;pointer-events:none;z-index:2;overflow:hidden}
.scene-labels svg{position:absolute;inset:0;width:100%;height:100%}
.scene-labels path{fill:none;stroke:#1f3a45;stroke-width:1.2;opacity:.7}
.scene-labels circle{fill:#fff;stroke:#1f3a45;stroke-width:1.6}
.scene-label{position:absolute;left:0;top:0;font:600 12.5px/1.25 'DM Sans','Noto Sans JP',sans-serif;letter-spacing:0;color:#16303a;background:rgba(255,255,255,.94);border:1px solid #c8d4d9;border-radius:6px;padding:5px 9px;white-space:nowrap;min-height:0;pointer-events:none;box-shadow:0 2px 10px rgba(20,40,50,.10)}
button.scene-label{pointer-events:auto;cursor:pointer}
button.scene-label:hover{background:#fff;border-color:#123541}
.scene-label.active{background:#123541;color:#fff;border-color:#123541}
.flow-legend{position:absolute;left:16px;bottom:12px;z-index:3;display:none;align-items:center;gap:14px;flex-wrap:wrap;padding:7px 12px;border-radius:8px;background:rgba(255,255,255,.93);border:1px solid #d0dbdf;font:500 12px/1.3 'DM Sans','Noto Sans JP',sans-serif;color:#1d3843;box-shadow:0 2px 10px rgba(20,40,50,.08);max-width:calc(100% - 32px)}
.viewport[data-view=rear] .flow-legend,.viewport[data-view=circuit] .flow-legend{display:flex}
.viewport[data-view=rear] .view-note,.viewport[data-view=circuit] .view-note,.viewport[data-view=rear] .canvas-badge,.viewport[data-view=circuit] .canvas-badge{display:none}
.fl-title{font-weight:700}
.fl-ramp{display:inline-flex;align-items:center;gap:6px}
.fl-ramp i{display:inline-block;width:92px;height:9px;border-radius:5px}
.fl-phase{display:inline-flex;align-items:center;gap:6px}
.fl-phase b{display:inline-block;border-radius:50%}
.fl-phase .bead{width:8px;height:8px;background:#6d7b82}
.fl-phase .puff{width:14px;height:14px;background:rgba(109,123,130,.28);box-shadow:0 0 0 1px rgba(109,123,130,.45)}
.look{margin:14px 0 0;padding:10px 12px;border-left:3px solid var(--cold);background:#f1f6f7;border-radius:0 6px 6px 0;font-size:14px!important;line-height:1.6!important}
.look b{display:block;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--cold);margin-bottom:2px}
@media(max-width:650px){.scene-label{font-size:11px;padding:4px 7px}.flow-legend{left:10px;bottom:8px;gap:9px;padding:6px 9px;font-size:11px;max-width:calc(100% - 20px)}.fl-title{display:none}.fl-ramp i{width:60px}.view-note,.canvas-badge{background:none;padding:0}}

/* Dark theme: follow the site's ink and paper tokens */
html[data-theme=dark]{--line:#3a3631;--cold:#4fb3c4;--hot:#e7835a}
html[data-theme=dark] .viewport{background:#1d1b18}
html[data-theme=dark] .view-note,html[data-theme=dark] .canvas-badge{background:rgba(29,27,24,.8);color:#c3bab0}
html[data-theme=dark] .canvas-badge{color:var(--cold)}
html[data-theme=dark] button{background:#22201c;color:#ece7df;border-color:#3d3933}
html[data-theme=dark] button:hover{background:#2c2925}
html[data-theme=dark] button[aria-pressed=true],html[data-theme=dark] button.active{background:#4fb3c4;color:#10181b;border-color:#4fb3c4}
html[data-theme=dark] .view-tools button{background:rgba(34,32,28,.92)}
html[data-theme=dark] .view-tools button.active{background:#4fb3c4;color:#10181b}
html[data-theme=dark] .experience,html[data-theme=dark] .flow-panel,html[data-theme=dark] .lab,html[data-theme=dark] .chart-wrap{background:#191714;border-color:var(--line)}
html[data-theme=dark] .side,html[data-theme=dark] .sliders{border-color:var(--line)}
html[data-theme=dark] .intro p,html[data-theme=dark] .side p,html[data-theme=dark] .section-heading>p,html[data-theme=dark] .facts p,html[data-theme=dark] .article p,html[data-theme=dark] details p,html[data-theme=dark] .chart-header p,html[data-theme=dark] .model-note,html[data-theme=dark] .control small,html[data-theme=dark] .readout small,html[data-theme=dark] .footer,html[data-theme=dark] .brand span{color:#b9b0a4!important}
html[data-theme=dark] .bar-track{background:#2a2723}
html[data-theme=dark] .bar.work{background:#8c9aa1}
html[data-theme=dark] .article{border-top-color:#4a5357}
html[data-theme=dark] .flow-svg text{fill:#e4ddd3}
html[data-theme=dark] .flow-svg text.in{fill:#173440}
html[data-theme=dark] .flow-svg .tiny{fill:#b9b0a4}
html[data-theme=dark] .chart text{fill:#b9b0a4}
html[data-theme=dark] .chart line[stroke="#dbe5e8"]{stroke:#35322d}
html[data-theme=dark] .chart rect{fill:#24434a}
html[data-theme=dark] .chart path{stroke:#4fb3c4}
html[data-theme=dark] .chart-legend span+span:before{background:#24434a}
html[data-theme=dark] .look{background:#1f2b2d}
html[data-theme=dark] .scene-label{background:rgba(30,28,25,.94);color:#ece7df;border-color:#47423b;box-shadow:0 2px 10px rgba(0,0,0,.35)}
html[data-theme=dark] button.scene-label:hover{background:#2a2723;border-color:#4fb3c4}
html[data-theme=dark] .scene-label.active{background:#4fb3c4;color:#10181b;border-color:#4fb3c4}
html[data-theme=dark] .scene-labels path{stroke:#d9d1c6}
html[data-theme=dark] .scene-labels circle{fill:#1d1b18;stroke:#d9d1c6}
html[data-theme=dark] .flow-legend{background:rgba(30,28,25,.94);border-color:#47423b;color:#ece7df}
html[data-theme=dark] .skip{background:#191714}