/* Model foundations: open reading rows, diagrams and saved examples. */
:root{--paper:#fff;--white:#fff;--ink:#20242b;--muted:#59636e;--blue:#2357a4;--teal:#2357a4;--copper:#a85b2a;--line:#dce1e6;--pale:#f4f6f8}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 var(--font-ui)}
a{color:var(--blue);text-underline-offset:4px}a:hover{color:var(--ink)}button,input,select{font:inherit}button,select{cursor:pointer}button{color:inherit}
.wrap{width:min(1160px,calc(100% - 72px));margin-inline:auto}
.skip{position:absolute;top:-90px;left:20px;background:var(--ink);color:white;padding:12px;z-index:50}.skip:focus{top:8px}
.masthead{display:flex;align-items:center;justify-content:space-between;gap:30px;padding-block:22px;border-bottom:1px solid var(--line)}
.wordmark{font-size:17px;font-weight:600;line-height:1.35;letter-spacing:-.02em;text-decoration:none;color:var(--ink)}.wordmark em{font-style:normal;color:var(--ink)}
h1,h2,h3{font-family:inherit;font-weight:600;letter-spacing:-.025em;line-height:1.2}h1{font-size:var(--type-h1);margin:15px 0 18px}h2{font-size:var(--type-h2);margin:0}h3{font-size:var(--type-h3);margin:0}p{margin:0}
.hero{padding-block:42px 36px}.hero>p{font-size:var(--type-lead);color:var(--muted);max-width:68ch}
.eyebrow,.kicker{font-size:17px;letter-spacing:.025em;color:var(--muted)}.eyebrow{font-weight:500}.eyebrow span{padding-inline:12px;color:#8b939c}
.jump{display:inline-flex;align-items:center;gap:25px;font-size:17px;text-decoration:none;margin-top:22px;border-bottom:1px solid var(--line);padding-bottom:5px}.jump:hover{border-color:var(--blue)}
.section{border-top:1px solid var(--line);padding-block:32px 38px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:28px}.section-heading .kicker{display:block;margin-bottom:10px}.section-heading>p{font-size:17px;color:var(--muted);text-align:right;max-width:32ch}
.component-map{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:28px}
.component{min-width:0;position:relative;padding:15px 0 19px;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}.component:not(:last-child):after{content:'→';position:absolute;right:-22px;top:44%;color:#8c98a5;font-size:18px}
.component>span{font-size:17px;line-height:1.4;color:var(--muted);display:block;margin-bottom:15px;font-variant-numeric:tabular-nums}.component strong{display:block;font-size:21px;line-height:1.25;font-weight:600}.component small{display:block;font-size:var(--type-note);line-height:1.6;color:var(--muted);margin-top:10px}.component:hover{border-color:var(--blue)}.component:hover strong{color:var(--blue)}
.guide-grid{display:block}.guide-card{padding:25px 0;border-bottom:1px solid var(--line);text-decoration:none;display:grid;grid-template-columns:minmax(220px,1fr) minmax(0,1.25fr) 28px;grid-template-areas:'label description arrow' 'title description arrow';gap:12px 38px;color:var(--ink)}.guide-card:first-child{padding-top:0}.guide-card:last-child{border-bottom:0;padding-bottom:0}.guide-card>.kicker{grid-area:label}.guide-card h2{grid-area:title;font-size:var(--type-h2)}.guide-card p{grid-area:description;align-self:center;font-size:17px;color:var(--muted);max-width:52ch}.guide-card .arrow{grid-area:arrow;align-self:center;color:var(--blue);font-size:25px}.guide-card:hover h2{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}
.bridges{display:block}.bridges a{display:grid;grid-template-columns:200px minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:baseline;padding:21px 0;border-top:1px solid var(--line);text-decoration:none}.bridges span{font-size:17px;color:var(--muted)}.bridges strong{font-size:22px;line-height:1.4;font-weight:600;color:var(--ink)}.bridges small{font-size:17px;color:var(--muted)}.bridges a:hover strong{color:var(--blue)}
.map-panel{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:48px;align-items:center}.map-panel>*{min-width:0}
.demand-tree{padding:24px 12px;text-align:center}.tree-top{border-block:1px solid var(--line);padding:13px;font-size:22px;font-weight:500;line-height:1.35}.tree-line{height:23px;width:1px;background:#aeb8c2;margin:auto}.tree-sectors{display:grid;grid-template-columns:1fr 1fr;gap:24px}.tree-sector{border-top:1px solid var(--line);padding:15px 10px}.tree-sector>strong{font-size:17px;font-weight:600}.tree-firms{display:flex;justify-content:center;gap:12px;margin-top:16px}.tree-firms>span{padding:5px 10px;border-bottom:2px solid var(--blue);color:var(--blue);font-size:17px;line-height:1.4}.tree-note{font-size:var(--type-label);color:var(--muted);margin:12px 0}
.two-cards{display:grid;grid-template-columns:1fr 1fr;gap:28px}.mini-card{padding:20px 0;border-top:1px solid var(--line)}.mini-card h3{font-size:var(--type-h3)}.mini-card p{font-size:17px;color:var(--muted);margin-top:12px}.symbol{font:22px/1.2 var(--font-math);color:var(--blue);display:block;margin-bottom:14px}
.formula-row{display:grid;grid-template-columns:1fr 1fr;gap:38px}.formula-card{padding:22px 0;border-block:1px solid var(--line);min-width:0}.formula-card .kicker{display:block;margin-bottom:17px}.equation{font:22px/1.6 var(--font-math);color:var(--blue);overflow-wrap:anywhere}.formula-card small{display:block;font-size:var(--type-note);color:var(--muted);margin-top:14px}
.loop{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:28px;margin-block:27px}.loop>div{position:relative;border-bottom:1px solid var(--line);padding:12px 0 17px;min-width:0}.loop>div:not(:last-child):after{content:'→';position:absolute;right:-22px;top:15px;color:#8c98a5}.loop strong{font-size:17px;font-weight:600;display:block}.loop span{font:22px/1.35 var(--font-math);color:var(--blue);display:block;margin-top:9px}.loop-note{font-size:17px;color:var(--muted);max-width:75ch}
.lab{padding:25px 0;border-top:1px solid var(--line)}.controls{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:25px;margin-bottom:30px}.controls>*,.entry-controls>*{min-width:0}.controls label,.entry-controls label{display:block;font-size:17px;font-weight:600;margin-bottom:9px}
select{display:block;width:100%;max-width:100%;min-height:44px;border:1px solid #b9c2cc;border-radius:2px;background:var(--white);color:var(--ink);padding:10px 12px;font-size:17px;line-height:1.4}
table{border-collapse:collapse;width:100%;font-size:17px;font-variant-numeric:tabular-nums;text-align:right}th,td{padding:15px 10px;border-bottom:1px solid var(--line)}th{font-size:17px;color:var(--muted);font-weight:500}th:first-child{text-align:left}tbody th{font-size:20px;line-height:1.4;color:var(--ink);width:50px}tbody tr:last-child>*{border-bottom:0}
.share-cell{width:40%}.share-value{display:block;font-size:22px;line-height:1.35;color:var(--ink);margin-bottom:9px}.share-track{display:block;height:5px;background:#edf0f3}.share-track>span{display:block;height:100%;background:var(--blue)}tbody tr:nth-child(2) .share-track>span{background:#6885aa}tbody tr:nth-child(3) .share-track>span{background:var(--copper)}.markup-cell{font-size:var(--type-value);line-height:1.25;color:var(--blue)}
.lab-note{font-size:var(--type-note);color:var(--muted);margin-top:20px;max-width:75ch}.lab-extra{margin-top:24px;border-top:1px solid var(--line);padding-top:17px}.lab-extra summary{font-size:17px;color:var(--blue);cursor:pointer}.lab-extra>div{padding-top:17px}.lab-extra table{font-size:17px}.lab-extra table tbody th{font-size:17px}.status{font-size:var(--type-note);line-height:1.65;color:var(--muted);margin-top:18px;padding-left:14px;border-left:2px solid var(--line)}
.short-list{list-style:none;margin:0;padding:0;display:grid;gap:13px}.short-list li{padding-left:16px;position:relative;font-size:17px;color:var(--muted)}.short-list li:before{content:'·';position:absolute;left:0;color:var(--blue);font-weight:600}
.bridge-panel{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:start}.bridge-panel>.short-list{border-top:1px solid var(--line);padding-top:18px}.bridge-panel .short-list a{font-size:17px}
.note{padding:0 0 0 19px;border-left:2px solid var(--copper);color:var(--muted);font-size:17px}.note strong{display:block;color:var(--ink);font-weight:600;margin-bottom:10px}
.reading{display:grid;grid-template-columns:1fr 1fr;gap:30px}.reading a{display:block;padding:19px 0;border-top:1px solid var(--line);font-size:17px;font-weight:600;text-decoration:none}.reading a:hover{border-color:var(--blue)}.reading a span{display:block;font-size:17px;font-weight:400;line-height:1.65;color:var(--muted);margin-top:10px}.reading-note{font-size:var(--type-note);color:var(--muted);margin-top:16px;max-width:75ch}
.downloads{display:flex;gap:20px;font-size:17px;margin-top:25px;flex-wrap:wrap}.scope{font-size:17px}.scope>summary{color:var(--blue);font-size:17px;cursor:pointer}.scope>div{padding-top:18px}.scope .short-list{gap:12px}.scope .short-list li{font-size:17px}
.code{font:16px/1.75 var(--font-code);white-space:pre-wrap;overflow-wrap:anywhere;background:var(--pale);padding:18px;margin-block:18px 0}
.entry-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px;margin-bottom:28px}.entry-flow>div{padding:17px 0;border-top:1px solid var(--line);position:relative}.entry-flow>div:not(:last-child):after{content:'→';position:absolute;right:-22px;top:24px;color:#8c98a5}.entry-flow span{display:block;font-size:var(--type-label);color:var(--muted)}.entry-flow strong{display:block;font-size:20px;line-height:1.35;font-weight:600;margin-top:10px}
.profit-line{padding:23px 0;border-block:1px solid var(--line);display:flex;justify-content:space-between;align-items:baseline;gap:30px;margin-bottom:26px}.profit-line p{font-size:var(--type-note);color:var(--muted)}
.entry-controls{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:28px}.entry-overview{display:grid;grid-template-columns:140px 1fr 1fr;gap:30px;border-block:1px solid var(--line);padding:22px 0;margin:0 0 28px}.entry-overview dt{font-size:var(--type-label);color:var(--muted)}.entry-overview dd{font-size:var(--type-value);line-height:1.4;color:var(--ink);margin:8px 0 0;font-variant-numeric:tabular-nums}.entry-overview>div:first-child dd{font-size:var(--type-value);line-height:1.2;color:var(--blue)}
.entry-board{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;margin-bottom:25px}.entry-firm{padding:17px 8px;border-top:1px dashed #a8b2bc;text-align:center;color:var(--muted)}.entry-firm.is-active{border-top:2px solid var(--blue);color:var(--blue)}.entry-firm>strong{font-size:var(--type-h3);line-height:1.25;font-weight:600;display:block}.entry-firm>span{display:block;font-size:var(--type-label);margin-top:9px}.entry-firm>small{display:block;font-size:var(--type-label);margin-top:7px}
.entry-status{padding:5px 0 5px 15px;font-size:17px;border-left:2px solid var(--blue);margin-top:20px}.entry-status.is-invalid{border-color:var(--copper)}.entry-table td:last-child{font-variant-numeric:tabular-nums;white-space:nowrap}.gain-positive{color:var(--copper)}.gain-nonpositive{color:var(--blue)}.entry-table tbody th{font-size:20px}.entry-table td{font-size:17px}.entry-profile-label{font-size:17px;color:var(--muted);margin-bottom:14px}
.conditions{display:grid;grid-template-columns:1fr 1fr;gap:38px;margin-bottom:28px}.condition{padding:22px 0;border-bottom:1px solid var(--line)}.condition h3{font-size:var(--type-h3);margin-bottom:9px}.condition p{font-size:var(--type-note);color:var(--muted);margin-top:12px}.condition .equation{font-size:22px}
.source-inline{font-size:var(--type-note);line-height:1.7;color:var(--muted);margin-top:22px;padding:0 0 0 15px;border-left:2px solid var(--line);max-width:85ch}.source-inline a{font-size:inherit;font-weight:500}
footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:25px;padding-block:23px 32px;font-size:17px;color:var(--muted)}.noscript{padding-bottom:25px;font-size:17px}:focus-visible{outline:3px solid var(--blue);outline-offset:4px}[hidden]{display:none!important}
@media(max-width:1000px){
  .component-map{gap:22px}.component strong{font-size:19px}.component small{font-size:var(--type-note)}.component:not(:last-child):after{right:-19px}.map-panel{gap:28px}.controls{gap:18px}.guide-card{column-gap:25px}.bridges a{grid-template-columns:170px 1fr 1fr;gap:22px}.entry-flow{gap:22px}.entry-flow strong{font-size:20px}.entry-flow>div:not(:last-child):after{right:-19px}
}
@media(max-width:700px){
  .wrap{width:calc(100% - 40px)}.masthead{flex-direction:column;align-items:start;gap:16px;padding-block:19px}.wordmark{font-size:17px}.hero{padding-block:30px}.hero h1{font-size:var(--type-h1);margin-block:14px 16px}.hero>p{font-size:var(--type-lead)}.eyebrow,.kicker{font-size:17px}.jump{font-size:17px;margin-top:20px}
  .section{padding-block:27px 32px}.section-heading{flex-direction:column;align-items:start;gap:14px;margin-bottom:24px}.section-heading h2{font-size:var(--type-h2)}.section-heading>p{font-size:17px;max-width:none;text-align:left}.section-heading .kicker{font-size:17px}
  .component-map{grid-template-columns:minmax(0,1fr);gap:12px}.component{display:grid;grid-template-columns:30px 1fr;gap:5px 14px;align-items:baseline;padding:16px 0 19px}.component>span{grid-row:1/3;font-size:17px;margin:0}.component strong{font-size:22px}.component small{font-size:var(--type-note);margin:0}.component:not(:last-child):after{content:'↓';top:auto;right:5px;bottom:-14px;line-height:1}
  .guide-card{grid-template-columns:minmax(0,1fr) 25px;grid-template-areas:'label arrow' 'title arrow' 'description description';gap:12px 20px;padding:24px 0}.guide-card h2{font-size:var(--type-h2)}.guide-card p{font-size:17px}.guide-card .arrow{align-self:start}
  .bridges a{grid-template-columns:minmax(0,1fr);gap:8px;padding-block:20px}.bridges strong{font-size:22px}.bridges small{font-size:17px}.bridges span{font-size:17px}.map-panel,.bridge-panel{grid-template-columns:minmax(0,1fr);gap:28px}
  .two-cards{gap:24px}.mini-card{padding-block:18px}.mini-card h3{font-size:var(--type-h3)}.mini-card p{font-size:17px}.symbol{font-size:22px;margin-bottom:13px}.demand-tree{padding:17px 0}.tree-top{font-size:22px;padding:12px}.tree-sector{padding:13px 5px}.tree-sectors{gap:18px}.tree-firms{gap:6px}.tree-firms>span{padding:5px 8px;font-size:17px}.tree-note{font-size:var(--type-label)}
  .formula-row{grid-template-columns:minmax(0,1fr);gap:23px}.formula-card{padding:20px 0}.formula-card .kicker{font-size:17px;margin-bottom:13px}.equation{font-size:22px}.formula-card small{font-size:var(--type-note);margin-top:12px}
  .loop{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-block:24px}.loop>div{padding-block:11px 15px}.loop strong{font-size:17px}.loop span{font-size:22px}.loop>div:not(:last-child):after{right:-17px}.loop>div:nth-child(3):after{display:none}.loop-note{font-size:17px}
  .lab{padding:21px 0}.controls{grid-template-columns:minmax(0,1fr);gap:18px;margin-bottom:26px}.controls label,.entry-controls label{font-size:17px;margin-bottom:8px}select{font-size:17px;padding:10px 12px}
  .lab table{font-size:17px}th,td{padding:13px 6px}.lab th{font-size:17px}.lab tbody th{font-size:20px;width:32px}.share-cell{width:43%}.share-value{font-size:22px;margin-bottom:7px}.markup-cell{font-size:var(--type-value)}.lab-note,.status{font-size:var(--type-note);margin-top:17px}.lab-extra{margin-top:21px;padding-top:16px}.lab-extra summary{font-size:17px}.lab-extra table{font-size:17px}
  .short-list li,.bridge-panel .short-list a{font-size:17px}.note{font-size:17px;padding-left:16px}.reading{grid-template-columns:minmax(0,1fr);gap:0}.reading a{font-size:17px;padding-block:18px}.reading a span{font-size:17px}.reading-note{font-size:var(--type-note)}.scope>summary{font-size:17px}.scope .short-list li{font-size:17px}.code{font-size:16px;padding:16px}.downloads{font-size:17px;gap:15px 20px;margin-top:22px}
  .entry-flow{grid-template-columns:1fr 1fr;gap:18px 24px;margin-bottom:24px}.entry-flow>div{padding:14px 0}.entry-flow>div:nth-child(2):after{display:none}.entry-flow span{font-size:var(--type-label)}.entry-flow strong{font-size:20px;margin-top:9px}
  .profit-line{flex-direction:column;gap:13px;padding-block:20px;margin-bottom:24px}.profit-line .equation{font-size:22px}.profit-line p{font-size:var(--type-note)}.entry-controls{grid-template-columns:minmax(0,1fr);gap:18px;margin-bottom:24px}.entry-overview{grid-template-columns:110px 1fr;gap:20px 24px;padding-block:20px;margin-bottom:24px}.entry-overview>div:last-child{grid-column:1/-1}.entry-overview dt{font-size:var(--type-label)}.entry-overview dd{font-size:var(--type-value);margin-top:7px}.entry-overview>div:first-child dd{font-size:var(--type-value)}
  .entry-board{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px 24px;margin-bottom:23px}.entry-firm{padding:15px 5px}.entry-firm>strong{font-size:var(--type-h3)}.entry-firm>span,.entry-firm>small{font-size:var(--type-label)}.entry-table th,.entry-table td{padding:12px 5px}.entry-table td{font-size:17px}.entry-table tbody th{font-size:20px}.entry-status{font-size:17px;margin-top:18px}.entry-profile-label{font-size:17px;margin-bottom:12px}
  .conditions{grid-template-columns:minmax(0,1fr);gap:18px;margin-bottom:24px}.condition{padding:20px 0}.condition h3{font-size:var(--type-h3);margin-bottom:9px}.condition p{font-size:var(--type-note)}.condition .equation{font-size:22px}.source-inline{font-size:var(--type-note);padding-left:14px;margin-top:20px}.source-inline a{font-size:inherit}footer{flex-direction:column;gap:12px;font-size:17px}.noscript{font-size:17px}
}
@media(max-width:360px){
  .two-cards{grid-template-columns:minmax(0,1fr);gap:8px}.mini-card{display:grid;grid-template-columns:40px minmax(0,1fr);gap:0 14px}.mini-card .symbol{grid-row:1/3;margin:0}.mini-card p{margin-top:10px}.share-value{font-size:21px}.markup-cell{font-size:var(--type-value)}.entry-table td{font-size:17px}.loop{gap:15px}.loop strong{font-size:17px}.equation{font-size:22px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}