:root{--font-sans:"Helvetica World", "Helvetica Neue", Helvetica, Arial, "Liberation Sans", sans-serif;--font-display:var(--font-sans);--font-body:var(--font-sans);--font-mono:var(--font-sans);--ink:#1b1a19;--graphite:#3d3b3a;--ink-soft:#56534f;--label-ink:#6b6866;--paper:#f4f3f1;--paper-hi:#fff;--paper-deep:#eceae7;--rule:#d6d2ce;--rule-lo:#e6e3df;--brand:#0097b2;--brand-deep:#007a91;--brand-ink:#00697e;--brand-lift:#5fc6da;--brand-wash:#0097b214;--brand-wash-2:#0097b229;--sea:var(--brand);--sea-deep:var(--brand-deep);--marker:var(--brand);--marker-ink:var(--brand-ink);--gap:var(--graphite);--contour:#cdc9c4;--contour-lo:#e4e1dd;--sp-1:8px;--sp-2:12px;--sp-3:18px;--sp-4:26px;--sp-5:36px;--sp-6:54px;--sp-section:clamp(64px, 7.4vw, 112px);--sp-gutter:clamp(24px, 5vw, 64px);--radius:0px;--border-card:1px solid var(--rule);--shadow-card:0 1px 1px #1b1a190a, 0 10px 28px #1b1a1914;--rule-strong:1px solid var(--ink)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}html.fx{scroll-behavior:auto}body{background:var(--paper);color:var(--ink);font-family:var(--font-sans);letter-spacing:-.005em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-variant-numeric:tabular-nums;font-size:15.5px;line-height:1.55}button{font:inherit;color:inherit;cursor:pointer;letter-spacing:inherit;background:0 0;border:none}a{color:var(--brand-ink)}::selection{background:#0097b238}:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.mono{font-family:var(--font-sans);text-transform:uppercase;letter-spacing:.15em;font-size:10.5px;font-weight:500;line-height:1.5}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.container{max-width:1120px;margin:0 auto;padding:0 clamp(18px,4vw,44px)}.container.narrow{max-width:780px}.container-wide{max-width:1340px}.section .container+.container-wide{margin-top:var(--sp-6)}.kicker{color:var(--brand-ink);margin-bottom:16px;display:block}.btn{border-radius:var(--radius);letter-spacing:-.005em;white-space:nowrap;justify-content:center;align-items:center;gap:9px;min-height:44px;padding:12px 20px;font-size:14px;font-weight:500;line-height:1.2;text-decoration:none;transition:background .15s,border-color .15s,color .15s;display:inline-flex}.btn-primary{background:var(--brand-deep);color:#fff;border:1px solid var(--brand-deep)}.btn-primary:hover{background:var(--brand-ink);border-color:var(--brand-ink)}.btn-ghost{border:1px solid var(--ink);color:var(--ink);background:0 0}.btn-ghost:hover{background:var(--ink);color:var(--paper-hi)}.btn-quiet{color:var(--ink-soft);border-radius:var(--radius);padding:6px 10px;font-size:12.5px}.btn-quiet:hover{color:var(--brand-ink);background:var(--brand-wash)}.site-nav{z-index:90;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule);background:#f4f3f1e0;position:sticky;top:0}.site-nav-inner{justify-content:space-between;align-items:center;gap:16px;padding-top:13px;padding-bottom:13px;display:flex}.site-brand{letter-spacing:-.025em;color:var(--ink);align-items:center;gap:10px;font-size:17px;font-weight:500;text-decoration:none;display:inline-flex}.wm-atlas{color:var(--brand-ink)}.nav-right{align-items:center;gap:clamp(10px,1.6vw,22px);display:flex}.site-nav-links{align-items:stretch;display:flex}.site-nav-links a{letter-spacing:-.006em;color:var(--ink-soft);white-space:nowrap;border-left:1px solid var(--rule-lo);align-items:center;padding:7px 15px;font-size:13px;font-weight:500;text-decoration:none;transition:color .15s;display:flex;position:relative}.site-nav-links a:first-child{border-left:none}.site-nav-links a:after{content:"";background:var(--brand);transform-origin:0;height:2px;transition:transform .18s;position:absolute;bottom:-12px;left:15px;right:15px;transform:scaleX(0)}.site-nav-links a:hover{color:var(--ink)}.site-nav-links a:hover:after{background:var(--rule);transform:scaleX(1)}.site-nav-links a[aria-current=true]{color:var(--ink)}.site-nav-links a[aria-current=true]:after,.site-nav-links a[aria-current=true]:hover:after{background:var(--brand);transform:scaleX(1)}.nav-menu-btn{border:1px solid var(--ink);min-height:44px;color:var(--ink);background:0 0;align-items:center;gap:9px;padding:10px 14px;transition:background .15s,color .15s;display:none}.nav-menu-btn:hover{background:var(--ink);color:var(--paper-hi)}.nav-glyph rect{fill:currentColor;transform-box:fill-box;transform-origin:50%;transition:transform .2s}.nav-menu-btn.is-open .ng-a{transform:translateY(3.7px)rotate(45deg)}.nav-menu-btn.is-open .ng-b{transform:translateY(-3.7px)rotate(-45deg)}.nav-sheet{z-index:89;background:var(--paper);padding-top:calc(var(--nav-h,70px) + 20px);padding-bottom:40px;animation:.22s sheet-in;position:fixed;inset:0;overflow-y:auto}@keyframes sheet-in{0%{opacity:0;transform:translateY(-8px)}}.nav-sheet-title{color:var(--label-ink);border-bottom:var(--rule-strong);padding-bottom:10px;display:block}.nav-sheet-list a{border-bottom:1px solid var(--rule-lo);color:var(--ink);align-items:baseline;gap:18px;padding:17px 0;text-decoration:none;display:flex}.nav-sheet-list .ns-n{color:var(--brand-ink);flex:none}.nav-sheet-list .ns-t{letter-spacing:-.026em;font-size:clamp(19px,5vw,23px);font-weight:500;line-height:1.15}.nav-sheet-list a[aria-current=true] .ns-t{color:var(--brand-ink)}.nav-sheet-foot{flex-direction:column;align-items:flex-start;gap:18px;margin-top:30px;display:flex}.nav-sheet-cta{width:100%;max-width:340px}.nav-sheet-mail{color:var(--label-ink);font-size:14px;text-decoration:none}@media (max-width:1000px){.site-nav-links{display:none}.nav-menu-btn{display:inline-flex}}@media (min-width:1001px){.nav-sheet{display:none}}.cta-short{display:none}@media (max-width:620px){.cta-long{display:none}.cta-short{display:inline}.nav-cta{padding:12px 14px}.nav-menu-btn{padding:10px 11px}.site-nav-inner{gap:10px}}@media (max-width:360px){.site-brand .wordmark{display:none}}.hero{padding:var(--sp-section) 0 0;position:relative;overflow:hidden}.hero-inner{gap:var(--sp-gutter);grid-template-columns:minmax(0,1fr) minmax(0,.62fr);align-items:center;display:grid;position:relative}.hero-figure{aspect-ratio:1;width:100%;display:block;position:relative}@media (max-width:980px){.hero-inner{grid-template-columns:1fr}.hero-figure{opacity:.4;pointer-events:none;z-index:-1;width:62%;position:absolute;inset:auto -22% -14% auto}}@media (max-width:700px){.hero-figure{display:none}}.hero-h1{letter-spacing:-.04em;text-wrap:balance;max-width:15ch;font-size:clamp(40px,6.6vw,76px);font-weight:700;line-height:.98}.hero-h1 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em{color:var(--brand-ink);font-style:normal}.section-lede{margin-top:var(--sp-3);color:var(--ink-soft);max-width:62ch;font-size:16px;line-height:1.55}.sec-intro{gap:var(--sp-gutter);grid-template-columns:minmax(0,1.12fr) minmax(0,1fr);align-items:end;display:grid}.sec-intro .section-lede,.sec-intro .lede-xl{max-width:46ch;margin-top:0}.sec-intro.statement{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);align-items:start}.sec-intro.statement .section-h2{max-width:100%}.sec-intro.statement .lede-xl{max-width:52ch}@media (max-width:880px){.sec-intro{gap:var(--sp-3);grid-template-columns:1fr}}.lede-xl{margin-top:var(--sp-3);letter-spacing:-.014em;color:var(--ink-soft);max-width:58ch;font-size:clamp(17px,1.7vw,20px);line-height:1.48}.lede-xl strong{color:var(--ink);font-weight:500}.rulegrid{border-top:var(--rule-strong);margin-top:var(--sp-5);display:grid}.rulegrid .cell{padding:var(--sp-4) 30px var(--sp-5);border-right:1px solid var(--rule)}.rulegrid.c3{grid-template-columns:repeat(3,1fr)}.rulegrid.c3 .cell:nth-child(3n){border-right:none;padding-right:0}.rulegrid.c3 .cell:nth-child(3n+1){padding-left:0}.rulegrid.c2{grid-template-columns:repeat(2,1fr)}.rulegrid.c2 .cell:nth-child(2n){border-right:none;padding-right:0}.rulegrid.c2 .cell:nth-child(odd){padding-left:0}.rulegrid.c2 .cell:nth-child(n+3){border-top:1px solid var(--rule)}.cell-n{color:var(--label-ink);margin-bottom:var(--sp-2);display:block}.cell-title{letter-spacing:-.022em;margin-bottom:var(--sp-1);text-wrap:balance;font-size:19px;font-weight:700;line-height:1.18}.cell p{color:var(--ink-soft);font-size:14.5px;line-height:1.55}@media (max-width:880px){.rulegrid.c3,.rulegrid.c2{grid-template-columns:1fr}.rulegrid .cell{border-right:none;border-top:1px solid var(--rule);padding:var(--sp-4) 0 var(--sp-5)}.rulegrid .cell:first-child{border-top:none}}.routes{margin-top:var(--sp-3);border-top:1px solid var(--rule-lo);list-style:none}.routes li{border-bottom:1px solid var(--rule-lo);color:var(--ink);gap:10px;padding:9px 0;font-size:13.5px;line-height:1.4;display:flex}.routes li:before{content:"→";color:var(--brand);flex:none}.sec-tail{margin-top:var(--sp-6);max-width:62ch}.step-fig{letter-spacing:-.05em;color:var(--brand);margin-bottom:14px;font-size:40px;font-weight:700;line-height:1;display:block}.source-tag-inline{font-family:var(--font-sans);letter-spacing:.1em;text-transform:uppercase;color:var(--brand-ink);background:var(--brand-wash);border:1px solid var(--brand-wash-2);border-radius:var(--radius);white-space:nowrap;padding:2px 6px;font-size:10px;font-weight:500;position:relative}.cta-inner{gap:var(--sp-gutter);grid-template-columns:minmax(0,1fr) minmax(0,.5fr);align-items:center;display:grid}.cta-figure{aspect-ratio:1;width:100%}@media (max-width:880px){.cta-inner{grid-template-columns:1fr}.cta-figure{display:none}}.site-footer{border-top:var(--rule-strong);color:var(--label-ink)}.site-footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:20px;padding-top:28px;padding-bottom:46px;display:flex}.site-footer-brand{color:var(--ink);letter-spacing:-.025em;align-items:center;gap:10px;font-size:15px;font-weight:500;display:flex}.site-footer .mono{color:var(--label-ink);margin-top:8px;font-size:10px;display:block}.site-footer-links{align-items:baseline;gap:26px;font-size:13px;display:flex}.site-footer-links a{color:var(--label-ink);text-decoration:none}.site-footer-links a:hover{color:var(--brand-ink)}.atlas-frame{--ground:#f1efec;--wire:#cdc8c2;--wire-thin:#dbd6d0;border:1px solid var(--ink);background:var(--paper-hi);height:clamp(560px,78vh,780px);box-shadow:var(--shadow-card);flex-direction:column;display:flex;position:relative;overflow:hidden}.atlas-frame.is-fullscreen{z-index:400;border:none;height:100dvh;position:fixed;inset:0}.atlas-head{border-bottom:1px solid var(--ink);background:var(--paper-hi);flex:none;align-items:center;gap:16px;padding:10px 14px;display:flex}.atlas-title{text-align:left;align-items:center;gap:10px;padding:3px 6px 3px 0;display:flex}.atlas-title:hover .at-name{color:var(--brand-ink)}.atlas-title>span:last-child{flex-direction:column;line-height:1.25;display:flex}.at-name{letter-spacing:-.01em;font-size:14px;font-weight:600;transition:color .15s}.at-sub{color:var(--label-ink);font-size:9.5px}.atlas-badge{color:var(--brand-ink);border:1px solid var(--brand);padding:3px 8px;font-size:9px;line-height:1.3}.atlas-head-actions{gap:8px;margin-left:auto;display:flex}.atlas-head-actions .btn{min-height:34px;padding:7px 14px;font-size:12.5px}.atlas-body{flex:1;grid-template-columns:348px 1fr;min-height:0;display:grid}.atlas-stage{background:var(--ground);min-width:0;position:relative;overflow:hidden}.atlas-board{cursor:grab;touch-action:pan-y;width:100%;height:100%;font-family:var(--font-sans);display:block;position:absolute;inset:0}.atlas-board:active{cursor:grabbing}.atlas-board text{-webkit-user-select:none;user-select:none;pointer-events:none}.board-ground{pointer-events:none}.grid-dot{fill:#d8d3cd}.block-frame{fill:#ffffff80;stroke:var(--rule);stroke-width:1px;vector-effect:non-scaling-stroke}.block-label{fill:var(--ink);letter-spacing:.17em;text-transform:uppercase;font-size:10.5px;font-weight:500}.block-sub{fill:var(--label-ink);letter-spacing:.01em;font-size:10px}.atlas-board[data-band=out] .block-sub,.atlas-board[data-band=far] .block-sub{opacity:0}.wire{fill:none;stroke:var(--wire);stroke-width:1.4px;stroke-linejoin:round;stroke-linecap:round;vector-effect:non-scaling-stroke;transition:stroke .2s,stroke-width .2s,opacity .2s}.wire.s2{stroke:var(--wire-thin);stroke-width:1.1px}.wire.s1{stroke:var(--wire-thin);stroke-width:1px;stroke-dasharray:3 3}.is-focused .wire,.has-answer .wire,.has-path .wire{opacity:.2}.wire.is-lit{stroke:var(--brand);stroke-width:2px;opacity:1}.wire.is-path{stroke:var(--brand-deep);stroke-width:2.6px;stroke-dasharray:none;opacity:1}.no-wires .wire:not(.is-lit){display:none}.junction{fill:var(--paper-hi);stroke:var(--brand);stroke-width:1.6px;vector-effect:non-scaling-stroke}.chip{cursor:pointer;outline:none}.chip-body{fill:var(--paper-hi);stroke:var(--rule);stroke-width:1px;vector-effect:non-scaling-stroke;transition:stroke .16s,fill .16s}.chip-gauge-track{fill:var(--rule-lo)}.chip-gauge{fill:var(--brand)}.chip-name{fill:var(--ink);letter-spacing:-.008em;font-size:12px;font-weight:600}.chip-role{fill:var(--label-ink);font-size:10px}.chip-ref{fill:var(--brand-ink);letter-spacing:.1em;font-size:9px;font-weight:500}.atlas-board[data-band=out] .chip-role,.atlas-board[data-band=out] .chip-ref{opacity:0}.chip:hover .chip-body,.chip.is-hover .chip-body,.chip.is-related .chip-body{stroke:var(--brand)}.chip.is-selected .chip-body,.chip.is-answer .chip-body,.chip.is-path .chip-body{stroke:var(--brand-deep);stroke-width:2px}.chip:focus-visible .chip-body{stroke:var(--ink);stroke-width:2px}.chip.is-gap .chip-body{fill:none;stroke:var(--graphite);stroke-dasharray:4 3}.chip.is-gap .chip-name{fill:var(--ink-soft)}.is-focused .chip,.has-answer .chip,.has-path .chip{opacity:.34;transition:opacity .2s}.is-focused .chip.is-related,.has-answer .chip.is-answer,.has-path .chip.is-path{opacity:1}.chip-step circle{fill:var(--brand-deep)}.chip-step text{fill:var(--paper-hi);text-anchor:middle;font-size:11px;font-weight:600}.other-boards{opacity:0;pointer-events:none;transition:opacity .7s}.other-boards.is-shown{opacity:1}.other-boards rect{fill:none;stroke:var(--rule);stroke-width:1px;stroke-dasharray:6 6;vector-effect:non-scaling-stroke}.other-boards text{fill:var(--label-ink);letter-spacing:.16em;text-transform:uppercase;text-anchor:middle;font-size:13px;font-weight:500}.other-boards .ob-note{letter-spacing:.04em;text-transform:none;opacity:.7;font-size:11px}.board-controls{z-index:3;flex-direction:column;align-items:flex-end;gap:8px;display:flex;position:absolute;top:14px;right:14px}.ctrl-stack{background:var(--paper-hi);border:1px solid var(--rule);flex-direction:column;display:flex;box-shadow:0 1px 2px #1b1a190f,0 6px 18px #1b1a1912}.ctrl{min-width:36px;min-height:34px;color:var(--ink);justify-content:center;align-items:center;gap:7px;padding:0 10px;font-size:12.5px;display:flex}.ctrl+.ctrl{border-top:1px solid var(--rule)}.ctrl:hover{background:var(--paper)}.ctrl.is-on{background:var(--ink);color:var(--paper-hi)}.zoom-stack .ctrl{padding:0;font-size:16px}.display-pop{background:var(--paper-hi);border:1px solid var(--rule);box-shadow:var(--shadow-card);min-width:186px;padding:10px 12px}.display-row{cursor:pointer;align-items:center;gap:8px;padding:4px 0;font-size:12.5px;display:flex}.display-row input{accent-color:var(--brand-deep);width:13px;height:13px}.board-legend{z-index:3;max-width:330px;position:absolute;bottom:12px;left:14px}.atlas-stage.tour-on .board-legend{display:none}.legend-toggle{background:var(--paper-hi);border:1px solid var(--rule);color:var(--ink);align-items:center;gap:7px;padding:6px 10px;display:inline-flex}.legend-caret{color:var(--label-ink);font-size:9px}.legend-body{background:var(--paper-hi);border:1px solid var(--rule);border-top:none;padding:10px 12px 12px}.legend-body ul{gap:7px;list-style:none;display:grid}.legend-body li{color:var(--ink-soft);align-items:center;gap:9px;font-size:12px;display:flex}.lg-swatch{border:1px solid var(--rule);background:var(--paper-hi);flex:none;width:26px;height:13px}.lg-gauge{border-left:3px solid var(--brand)}.lg-hollow{border:1px dashed var(--graphite);background:0 0}.lg-wire{fill:none;stroke:var(--wire);stroke-width:1.6px}.lg-wire.s1{stroke-width:1.1px;stroke-dasharray:3 3}.legend-note{border-top:1px solid var(--rule-lo);color:var(--label-ink);margin-top:9px;padding-top:8px;font-size:11.5px;line-height:1.45}.board-attribution{letter-spacing:.06em;text-transform:uppercase;color:var(--label-ink);background:#f1efecdb;margin-top:7px;padding:3px 6px;font-size:9.5px;display:inline-block}.wheel-hint{color:var(--paper-hi);opacity:0;pointer-events:none;z-index:5;background:#1b1a19e6;padding:8px 14px;font-size:12px;transition:opacity 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