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*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:clip}button,input,select{font:inherit}button,select{touch-action:manipulation}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;background:none;border:0;color:inherit}button:disabled{cursor:default;opacity:.4}a{color:inherit;text-decoration:none;text-underline-offset:5px}img{max-width:100%;height:auto;display:block}p,h1,h2,h3,figure,ul,ol,dl,dd{margin:0}h1,h2,h3{line-height:1.4;letter-spacing:-.025em;font-weight:620;text-wrap:balance}h2{font-size:clamp(32px,3.6vw,50px);line-height:1.45}h2 span,h1 span{color:var(--accent)}p{color:var(--muted)}[hidden]{display:none!important}::selection{background:#77edcf44;color:#fff}:focus-visible{outline:2px solid var(--accent);outline-offset:5px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#0b161d}::-webkit-scrollbar-thumb{background:#42646f;border-radius:5px}.shell{width:min(100%,1440px);padding-inline:60px;margin-inline:auto}.section{padding-block:118px}.icons{position:absolute;width:0;height:0;overflow:hidden}.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex:none;vertical-align:middle}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;clip:rect(0,0,0,0);overflow:hidden;white-space:nowrap}.skip{position:fixed;left:20px;top:-100px;padding:10px 20px;background:var(--accent);color:#09252b;z-index:500}.skip:focus{top:10px}.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;padding:12px 20px;min-height:48px;font-size:13px;font-weight:650;border-radius:4px;white-space:nowrap;transition:background .25s,transform .4s var(--ease)}.primary{background:var(--accent);color:#0b2c2f}.primary:hover{background:#a4f7e2;transform:translateY(-2px)}.text-link{display:inline-flex;align-items:center;gap:14px;font-size:13px;padding:8px 0;text-align:left}.text-link:hover{color:var(--accent)}.text-link .icon{width:18px;height:18px;transition:transform .3s var(--ease)}.text-link:hover .icon{transform:translateX(3px)}.icon-button{display:inline-grid;place-items:center;width:40px;height:40px;border:1px solid var(--line);border-radius:4px}.icon-button:hover{border-color:var(--accent);color:var(--accent)}.section-heading{display:grid;grid-template-columns:1.2fr 1fr;gap:80px;align-items:end;margin-bottom:62px}.section-heading>p,.section-heading>div>p{max-width:470px;line-height:2;font-size:15px}.demo-note{margin-top:24px;font-size:12px;color:#9bb1bc;line-height:1.8}.small-note{font-size:12px;line-height:1.8}.short-rule{height:1px;width:30px;background:var(--accent);flex:none}
/* Familiar TD family navigation. */
.header{position:fixed;inset:0 0 auto;z-index:100;background:#080e14f2;border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.nav-shell{height:var(--nav);max-width:1540px;margin:auto;padding-inline:42px;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:inline-flex;align-items:center;gap:11px;flex:none}.brand strong{display:block;font-size:24px;font-weight:720;line-height:1.25;letter-spacing:-.035em}.brand small{display:block;font-size:11px;letter-spacing:.14em;color:#abc3cd;line-height:1.5;margin-top:5px}.brand img{flex:none}#main-nav{display:flex;align-items:center;gap:28px;font-size:12px;color:#c0d2da}#main-nav a{position:relative;padding-block:23px;white-space:nowrap}#main-nav a:after{content:'';position:absolute;left:0;right:0;bottom:13px;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}#main-nav a:hover:after,#main-nav a.active:after{transform:scaleX(1)}.nav-actions{display:flex;gap:23px;align-items:center}.motion-toggle{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--accent);padding:10px 0}.motion-toggle .icon{width:14px;height:14px}.suite-link{display:flex;align-items:center;gap:8px;font-size:11px;border:1px solid var(--line);padding:9px 12px;border-radius:4px;white-space:nowrap}.suite-link .icon{width:13px;height:13px}.suite-link:hover{border-color:var(--accent)}.menu-toggle{display:none}.reading-progress{position:absolute;left:0;bottom:-1px;height:1px;width:0;background:var(--accent)}
/* An open, explorable map occupies the first viewport. */
.hero{padding-top:var(--nav);position:relative;overflow:hidden;background:#080f15}.hero-inner{display:grid;grid-template-columns:43% 57%;align-items:center;min-height:690px;position:relative;padding-top:38px;padding-bottom:35px}.hero-copy{padding-bottom:20px;position:relative;z-index:2}.hero h1{font-size:clamp(42px,4.55vw,65px);line-height:1.45;font-weight:660;letter-spacing:-.035em}.hero-position{margin-top:24px;font-size:17px;color:#c7dfe3}.hero-description{margin-top:24px;font-size:14px;line-height:2.1}.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:17px 25px;margin-top:36px}.hero-footnote{display:flex;align-items:center;gap:16px;margin-top:43px}.hero-footnote p{font-size:12px;color:#a8c2cc}.atlas-map{min-width:0;position:relative;padding-left:18px}.map-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#a8c3cd;gap:15px}.map-hint{font-size:11px;color:#99b2bf}.map-view{position:relative;width:100%;height:425px;isolation:isolate}.map-view>canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}#map-field{opacity:.13;mix-blend-mode:screen;mask-image:radial-gradient(ellipse at center,#000 10%,transparent 69%)}.map-core{position:absolute;top:48%;left:50%;transform:translate(-50%,-50%);text-align:center;pointer-events:none;white-space:nowrap}.map-core>span{display:block;color:#9dc3c8;font-size:11px;letter-spacing:.07em}.map-core>strong{display:block;font-size:51px;line-height:1.5;font-weight:550;letter-spacing:.045em;color:#dcfff4}.map-core>small{display:block;color:#a1c8cc;font-size:11px;letter-spacing:.03em}.map-node{position:absolute;transform:translate(-50%,-50%);display:flex;gap:8px;align-items:center;padding:8px 10px;white-space:nowrap;font-size:12px;color:#a7c4d1;border-radius:3px;transition:color .25s,background .25s}.map-node .node-dot{width:5px;height:5px;border:1px solid #8bc1d8;border-radius:50%;display:block;flex:none;background:#0a151b}.map-node[aria-pressed=true]{color:#e1fff6;background:#10282deb}.map-node[aria-pressed=true] .node-dot{background:var(--accent);border-color:var(--accent);box-shadow:none}.map-node:hover{color:var(--accent);background:#10282dbb}.map-node small{font-size:11px;color:#a6bcc7;margin-left:2px}.topic-tabs{display:flex;justify-content:center;gap:25px;border-bottom:1px solid var(--line)}.topic-tabs button{font-size:12px;padding:9px 2px 13px;position:relative;color:#a9c2cc}.topic-tabs button[aria-pressed=true]{color:var(--accent)}.topic-tabs button[aria-pressed=true]:after{content:'';height:1px;background:var(--accent);position:absolute;bottom:-1px;left:0;right:0}.map-detail{display:grid;grid-template-columns:125px 1fr 22px;align-items:center;gap:15px;min-height:99px;padding-top:15px}.map-detail>div>span{display:block;font-size:11px;color:#99b9c6}.map-detail strong{font-size:14px;font-weight:600;color:#d8eaf1;display:block}.map-detail p{font-size:12px;line-height:1.85;color:#a6bdc9}.map-detail>a{color:var(--accent);padding:8px 0}.hero-bottom{min-height:73px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:11px;color:#9dbdca}.hero-bottom>div{display:flex;align-items:center;gap:25px}.hero-bottom i{width:3px;height:3px;background:#6e969d;border-radius:50%}.hero-bottom>a{display:flex;gap:15px}.hero-bottom sup{font-size:7px}.map-static{position:absolute;inset:10% 0;text-align:center;color:var(--accent);line-height:3}.map-static+.map-core{display:none}
/* Principles as precise editorial rows, not feature cards. */
.foundation{padding-block:105px 115px}.foundation .section-heading{margin-bottom:55px}.knowledge-lines{display:flex;gap:50px}.knowledge-lines article{flex:1;min-width:0;border-top:1px solid var(--line);padding-top:28px;position:relative}.line-symbol{width:64px;height:65px;margin-bottom:16px;color:var(--accent)}.line-symbol svg{width:64px;height:65px;fill:none;stroke:currentColor;stroke-width:1}.knowledge-lines h3{font-size:21px;margin-bottom:13px}.knowledge-lines p{font-size:13px;line-height:1.95;max-width:320px}.line-tag{position:absolute;right:0;top:34px;font-size:11px;color:#a7c3cc}
/* The parameter journey stays within the dark TD surface. */
.data-section{background:var(--paper);color:var(--paper-ink);color-scheme:dark}.data-section h2 span{color:var(--accent)}.data-section p{color:var(--paper-muted)}.data-section :focus-visible{outline-color:var(--accent)}.spec-control{display:flex;align-items:center;gap:15px;font-size:12px;margin-top:22px;color:var(--muted)}.spec-control select{min-width:160px;border:0;border-bottom:1px solid #527b7d;background:transparent;padding:7px 20px 7px 0;font-size:17px;color:var(--ink);cursor:pointer;border-radius:0}.journey-tabs{display:flex;align-items:center;gap:0;border-bottom:1px solid var(--line);margin-bottom:30px}.journey-tabs>button{padding:15px 0;flex:1;text-align:left;font-size:13px;color:var(--muted);position:relative;white-space:nowrap}.journey-tabs>button>span:first-child{font-size:11px;margin-right:10px;color:#a9c3ce}.journey-tabs>button[aria-pressed=true]{color:var(--accent);font-weight:700}.journey-tabs>button[aria-pressed=true]:after{content:'';height:2px;background:var(--accent);position:absolute;left:0;bottom:-1px;width:calc(100% - 22px)}.journey-tabs .journey-play{flex:0 0 auto;color:var(--accent);display:flex;align-items:center;gap:7px;font-size:12px}.journey-play .icon{width:14px;height:14px}.data-theatre{position:relative;display:grid;grid-template-columns:1.1fr .88fr 1fr;gap:44px;padding-block:15px 37px;align-items:stretch}.source-sheet{background:#10212b;padding:26px 24px 22px;box-shadow:0 14px 30px #00000024;min-width:0;transition:transform .6s var(--ease),box-shadow .5s}.sheet-heading{display:flex;align-items:center;gap:7px;padding-bottom:19px;border-bottom:1px solid var(--line);font-size:11px}.sheet-heading b{font-size:11px;margin-left:auto;font-weight:500}.sheet-heading .icon{width:16px;height:16px}.source-sheet h3{font-size:18px;margin-top:24px}.sheet-subtitle{font-size:11px;margin-top:7px}.source-sheet table{border-collapse:collapse;width:100%;font-size:11px;margin-top:25px;font-variant-numeric:tabular-nums}.source-sheet th{font-size:11px;font-weight:500;color:#b4cbd3;text-align:right;padding:8px 3px;border-bottom:1px solid #77adac66;white-space:nowrap}.source-sheet th:first-child,.source-sheet td:first-child{text-align:left}.source-sheet td{padding:12px 3px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}.source-sheet tr.selected{background:#193a38;color:#d9fff3;font-weight:700}.sheet-source{display:flex;gap:8px;align-items:flex-start;margin-top:24px}.sheet-source p{font-size:11px;color:#b6ced3;line-height:1.8}.source-dot{width:5px;height:5px;background:var(--accent);border-radius:50%;flex:none;margin-top:7px}.source-sheet .small-note{font-size:11px;margin-top:10px;color:var(--muted)}.parameter-object{padding-top:25px;min-width:0}.object-header{display:flex;justify-content:space-between;gap:10px;font-size:11px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:15px}.unit-label{font-variant-numeric:tabular-nums}.parameter-name{margin-top:28px}.parameter-name strong{font-size:30px;font-weight:550;letter-spacing:-.02em;display:block;white-space:nowrap}.parameter-name>span{font-size:11px;color:var(--muted);display:block;margin-top:5px}.parameter-values{margin-top:25px;font-size:12px}.parameter-values>div{display:flex;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}.parameter-values dt{color:var(--muted)}.parameter-values i{font-style:normal;font-size:11px}.parameter-values dd{font-size:16px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--ink)}.parameter-proof{display:flex;align-items:center;gap:7px;margin-top:24px;color:var(--accent);font-size:11px}.parameter-proof .icon{width:16px;height:16px}.consumer-scene{border-left:1px solid var(--line);padding:25px 0 0 30px;display:flex;flex-direction:column;min-width:0}.consumer-heading>span{font-size:11px;color:var(--muted);display:block}.consumer-heading>strong{font-size:25px;font-weight:550;display:block;margin-top:5px}.consumer-scene svg{width:100%;height:auto;max-height:185px;margin-top:18px;fill:none;stroke:var(--accent);stroke-width:1.3}.consumer-scene svg text{fill:var(--blue);stroke:none;font:11px Manrope,sans-serif}.diagram-base{fill:#77edcf12;stroke:#79b7b3}.diagram-pitch{stroke-dasharray:4 4;stroke-width:.7}.consumer-result{padding-top:10px}.consumer-result>span{font-size:22px;font-weight:550;line-height:1.6;display:block}.consumer-result p{font-size:12px;margin-top:7px}.consumer-scene>.small-note{font-size:11px;line-height:1.9;color:#a9c3ce;display:block;margin-top:20px}.flow-track{position:absolute;bottom:12px;left:6%;right:5%;height:1px;background:#77edcf40;overflow:visible}.flow-track:before,.flow-track:after{content:'';position:absolute;top:-3px;width:7px;height:7px;border-radius:50%;background:#77bda9}.flow-track:after{right:0}.flow-track span{position:absolute;width:70px;height:2px;background:linear-gradient(90deg,transparent,#77edcf);top:0;left:0;transition:left 1.2s var(--ease)}.data-theatre[data-phase="1"] .flow-track span{left:40%}.data-theatre[data-phase="2"] .flow-track span{left:88%}.data-theatre[data-phase="3"] .flow-track span{left:0}.data-theatre[data-phase="0"] .source-sheet,.data-theatre[data-phase="3"] .source-sheet{box-shadow:0 12px 28px #00000040;transform:translateY(-4px)}.data-theatre[data-phase="1"] .parameter-name strong,.data-theatre[data-phase="2"] .consumer-heading strong{color:var(--accent)}.journey-caption{display:flex;align-items:center;justify-content:space-between;gap:30px;padding-top:25px;min-height:100px}.journey-caption>div{display:flex;gap:30px;align-items:baseline}.journey-caption strong{white-space:nowrap;font-size:14px;color:var(--ink)}.journey-caption p{font-size:13px}.data-section .text-link{color:var(--accent)}.data-section .text-link:hover{color:#b2ffe8}.source-trace{border-top:1px solid var(--line);margin-top:25px;padding:25px 0;display:grid;grid-template-columns:1fr 1fr;gap:20px 50px}.source-trace strong{font-size:13px}.source-trace p{font-size:12px;margin-top:8px;word-break:break-word}.source-trace button{grid-column:1/-1;justify-self:start}.data-provenance{font-size:11px;margin-top:25px;color:var(--muted)}
/* The AI stage keeps the answer and evidence in view. */
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/* One shared foundation with six distinct working contexts. */
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/* An evolving, curated body of engineering knowledge. */
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/* The actual prototype is evidence, presented at useful scale. */
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/* Minimum readable secondary copy across viewport sizes. */
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@media(max-width:380px){#prototype-title,#join-title{font-size:27px}}

/* The same TD visual language now carries inspectable engineering evidence. */
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.ai-stage{grid-template-columns:.8fr 1.2fr;align-items:start}.ai-conversation{height:100%}.ai-visual-context{font-size:12px;margin-top:20px;color:var(--muted)}#ai-evidence-visual{margin-top:16px}.evidence-stage{min-width:0}#ai-evidence-visual .ev-plot{margin-top:4px}#ai-evidence-visual .ev-readout{font-size:12px}#ai-evidence-visual .ev-caption{font-size:12px}#ai-evidence-visual .ev-legend{font-size:12px;gap:10px 15px}.evidence-stage .ai-answer{padding-top:24px;margin-top:22px;border-top:1px solid var(--line);min-height:0}.citation-detail>p{font-size:12px;line-height:1.9}.citation-detail>a{font-size:12px;color:var(--accent);margin-top:8px}.scenario-tabs{flex-wrap:wrap}.ai-controls{flex-wrap:wrap}#result-dialog{padding:50px 20px 20px;width:min(94vw,1250px)}#result-dialog img{width:auto;max-height:72vh;margin:auto}#result-dialog p{font-size:12px;text-align:center;margin-top:15px;line-height:1.9}
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