/* Home: a short introduction, a single framework, and routes into the tools. */
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--bg-1);color:var(--fg-2);font:400 18px/1.6 var(--font-body);-webkit-font-smoothing:antialiased}
h1,h2,h3,p,figure,dl,dd{margin:0}
h1,h2,h3,dt{font-family:var(--font-display);color:var(--fg-1);font-weight:600;letter-spacing:-.025em}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:4px}
button,a{touch-action:manipulation}
button{font:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--fg-1);outline-offset:5px}
[hidden]{display:none!important}
.wrap{width:min(1180px,calc(100% - 64px));margin-inline:auto}
.skip,.skip-link{position:absolute;left:16px;top:-80px;z-index:10;padding:10px 16px;background:var(--bg-3)}
.skip:focus,.skip-link:focus{top:12px}
.home-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0;border-bottom:1px solid var(--line-2)}
.lab-mark{font:500 12px/1.4 var(--font-mono);color:var(--fg-3);letter-spacing:.025em}
.lang-toggle{display:flex;flex-shrink:0;gap:2px;padding:3px;border:1px solid var(--line-2);border-radius:6px;background:var(--bg-2)}
.lang-btn{min-width:44px;min-height:38px;border:0;border-radius:3px;background:transparent;color:var(--fg-3);font:600 12px/1 var(--font-display)}
.lang-btn.active{background:var(--bg-3);color:var(--fg-1)}
.sec{padding:68px 0;border-bottom:1px solid var(--line-2)}
.hero{padding:46px 0 0}
.hero-grid{display:grid;grid-template-columns:1fr 1.03fr;align-items:center;gap:48px}
.eyebrow,.hero-kicker{font:600 12px/1.4 var(--font-display);letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
h1{font-size:clamp(42px,4.8vw,66px);line-height:1.07;max-width:17ch;text-wrap:balance;letter-spacing:-.045em}
h1 span{display:block}
.hero-sub{font-size:21px;line-height:1.5;max-width:46ch;margin-top:23px}
.hero-actions,.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:46px;padding:11px 19px;border:1px solid var(--line-3);border-radius:5px;background:var(--bg-2);color:var(--fg-1);font:600 14px/1.4 var(--font-display);text-align:center}
.btn:hover{background:var(--bg-3);text-decoration:none;border-color:var(--fg-4)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--bg-0)}
.btn.primary:hover{filter:brightness(1.12)}
.hero-access{font-size:14px;color:var(--fg-3);margin-top:15px}
.shot{overflow:hidden;border:1px solid var(--line-3);border-radius:8px;background:var(--bg-2)}
.shot-title,.figure-label{padding:14px 18px;border-bottom:1px solid var(--line-2);font:500 13px/1.5 var(--font-display);color:var(--fg-2)}
.shot-link{display:block;color:inherit}
.shot-link:hover{text-decoration:none}
.shot picture,.shot img{display:block;width:100%}
.shot img{height:auto}
.shot figcaption{padding:17px 20px;font-size:15px;line-height:1.5;color:var(--fg-3)}
.shot figcaption strong{display:block;color:var(--fg-1);font-weight:600;margin-bottom:5px}
.hero-router{margin-top:42px;padding:27px 0 26px;border-top:1px solid var(--line-2)}
.hr-label{font:500 18px/1.4 var(--font-display);color:var(--fg-1);margin-bottom:19px}
.hr-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.hr-q{display:flex;flex-direction:column;align-items:flex-start;gap:8px;color:var(--fg-2);padding:3px 24px 3px 0;text-decoration:none;min-width:0}
.hr-q+.hr-q{padding-left:28px;border-left:1px solid var(--line-2)}
.hr-q:hover{text-decoration:none}
.hr-q-q{font:600 15px/1.4 var(--font-display);color:var(--fg-1)}
.hr-q-detail{font-size:16px;line-height:1.4}
.hr-q-go{font-size:15px;color:var(--accent);margin-top:auto;padding-top:4px}
.hr-q:hover .hr-q-go{text-decoration:underline;text-underline-offset:4px}
.section-nav{display:flex;gap:10px 28px;flex-wrap:wrap;padding:17px 0;border-top:1px solid var(--line-2);font-size:14px}
.section-nav a{color:var(--fg-3);padding:4px 0}
h2{font-size:clamp(29px,3.4vw,43px);line-height:1.17;max-width:28ch;text-wrap:balance}
.lead{font-size:21px;line-height:1.6;max-width:800px;margin-top:20px}
.silos{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:33px;border:1px solid var(--line-3);border-radius:7px;background:var(--bg-2);overflow:hidden}
.silo{padding:24px}
.silo+.silo{border-left:1px solid var(--line-2)}
.silo dt{font-size:18px;letter-spacing:-.01em;display:flex;align-items:center;gap:10px;margin-bottom:9px}
.silo dt:before{content:"";width:7px;height:7px;flex-shrink:0;background:var(--accent);border-radius:2px}
.silo dd{font-size:17px;line-height:1.5;color:var(--fg-3)}
.example-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px}
.example-head .lead{max-width:740px}
.example-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:32px;align-items:start;margin-top:30px}
.scenario-presets{display:flex;flex-direction:column;gap:10px}
.scenario-option{text-align:left;border:1px solid var(--line-3);border-radius:6px;padding:17px 20px;background:var(--bg-2);color:var(--fg-2);min-height:84px}
.scenario-option[aria-pressed="true"]{border-color:var(--accent);box-shadow:inset 3px 0 var(--accent)}
.scenario-option .option-title{display:block;font:600 16px/1.4 var(--font-display);color:var(--fg-1)}
.scenario-option .option-note{display:block;font-size:15px;line-height:1.4;color:var(--fg-3);margin-top:6px}
.scenario-summary{padding-top:22px;min-height:143px}
.scenario-summary h3{font-size:20px;line-height:1.3;margin-bottom:10px}
.scenario-summary p{font-size:17px;line-height:1.55}
.scenario-assumptions{margin:16px 0 22px}
.scenario-nl{margin-top:15px}
.scenario-limit{display:block;margin-top:8px}
.text-link{display:inline-flex;align-items:center;min-height:44px;font-size:16px}
.hero-actions .primary::after,.hr-q-go::after,.play .go::after,.text-link::after,.ask-cta::after{content:" →";white-space:pre}
.small{font-size:15px;line-height:1.6;color:var(--fg-3)}
.scenario-note{margin-top:18px;max-width:940px}
.secondary-path{margin-top:15px;font-size:15px}
.plays{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
.play{display:flex;flex-direction:column;align-items:flex-start;min-height:225px;padding:23px;border:1px solid var(--line-2);border-radius:7px;background:var(--bg-2);color:var(--fg-2);transition:border-color .15s}
.play:hover{border-color:var(--accent);text-decoration:none}
.play .play-category{font:500 11px/1.5 var(--font-mono);letter-spacing:.07em;color:var(--fg-3);text-transform:uppercase;margin-bottom:14px}
.play h3{font-size:23px;line-height:1.25;margin-bottom:13px;max-width:19ch}
.play p{font-size:17px;line-height:1.5;margin-bottom:23px}
.play .go{color:var(--accent);font-size:15px;margin-top:auto}
.selection-note{margin-top:22px;max-width:930px}
.selection-details{margin-top:15px;max-width:940px;font-size:15px}
summary{cursor:pointer;color:var(--fg-2);padding:9px 0}
.selection-details p{color:var(--fg-3);margin:8px 0 14px}
.evidence-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:64px}
#ch-edge .evidence-layout{margin-top:30px}
.evidence-aside{padding:25px;background:var(--bg-2);border-radius:7px;border:1px solid var(--line-2);align-self:start}
.evidence-aside h3{font-size:23px;line-height:1.3;margin-bottom:15px}
.evidence-aside p{font-size:18px;line-height:1.6}
.evidence-items{display:grid;gap:23px}
.evidence-item{border-bottom:1px solid var(--line-2);padding-bottom:21px}
.evidence-item h3{font-size:20px;margin-bottom:8px}
.evidence-item p{font-size:17px;line-height:1.55}
.evidence-note{margin-top:23px;max-width:560px}
.asks{display:grid;grid-template-columns:1fr 1fr;gap:52px;margin-top:28px}
.ask{padding-top:22px;border-top:1px solid var(--line-3)}
.ask h3{font-size:22px;margin-bottom:12px}
.ask p{font-size:18px;max-width:52ch}
.ask .who{font:500 12px/1.5 var(--font-display);letter-spacing:.04em;color:var(--fg-3);margin-bottom:13px}
.ask a{display:inline-flex;align-items:center;min-height:44px;margin-top:14px;font-size:16px}
.footer{padding:27px 0 34px;font-size:13px;line-height:1.7;color:var(--fg-3)}
.footer-inner{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}
.footer-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-links a{color:var(--fg-3)}
@media(max-width:1000px){.hero-grid{gap:28px}h1{font-size:50px}.hero-sub{font-size:19px}.example-layout{grid-template-columns:.85fr 1.15fr}.silo{padding:20px}.silo dt{font-size:16px}.evidence-layout{gap:34px}}
@media(max-width:780px){.wrap{width:calc(100% - 40px)}.home-bar{padding:15px 0}.sec{padding:46px 0}.hero{padding:30px 0 0}.hero-grid,.example-layout,.evidence-layout{grid-template-columns:1fr;gap:26px}h1{font-size:48px;max-width:20ch}.hero-sub{font-size:20px;max-width:52ch}.hero-shot{max-width:650px}.silos{grid-template-columns:1fr 1fr}.silo:nth-child(3){border-left:0}.silo:nth-child(n+3){border-top:1px solid var(--line-2)}.plays{grid-template-columns:1fr 1fr}.hr-grid{gap:18px}.hr-q{padding-right:12px}.hr-q+.hr-q{padding-left:18px}.scenario-presets{display:grid;grid-template-columns:1fr 1fr}.scenario-summary{min-height:0}.example-controls .cta-row{margin-top:18px}.asks{gap:28px}.lead{font-size:20px}}
@media(max-width:500px){.lab-mark{font-size:10px;max-width:24ch}h1{font-size:43px}.hero-sub{font-size:19px;margin-top:18px}.hero-actions{gap:10px;margin-top:21px}.hero-actions .btn{font-size:13px;padding:11px 14px}.hero-access{font-size:13px}.hero-grid{gap:25px}.hero-router{margin-top:27px;padding-top:24px}.hr-grid{grid-template-columns:1fr;gap:0}.hr-q,.hr-q+.hr-q{padding:17px 0;border-left:0;border-top:1px solid var(--line-2);gap:6px}.hr-q:first-child{border-top:0;padding-top:0}.hr-q-go{padding-top:1px}.section-nav{gap:3px 20px;font-size:13px}.section-nav a{min-height:38px;display:flex;align-items:center}.silos{grid-template-columns:1fr}.silo{padding:20px}.silo+.silo{border-left:0;border-top:1px solid var(--line-2)}.silo dt{font-size:18px}.scenario-presets,.plays,.asks{grid-template-columns:1fr}.scenario-option{min-height:0}.play{min-height:0;padding:22px}.play p{margin-bottom:18px}.play h3{max-width:none}.lead{font-size:19px}.shot figcaption{padding:14px 16px;font-size:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.play{transition:none}}
/* A concrete decision entry beside the existing model example. */
.decision-invitation{display:flex;align-items:center;justify-content:space-between;gap:32px;margin-bottom:64px;padding-bottom:38px;border-bottom:1px solid var(--line-3)}
.decision-invitation>div{max-width:800px}.decision-invitation h2{font-size:clamp(25px,3vw,36px);margin:0 0 15px}.decision-invitation p{color:var(--fg-2)}.decision-invitation .eyebrow{color:var(--accent)}.decision-invitation>.btn{flex-shrink:0}
@media(max-width:800px){.decision-invitation{display:block;margin-bottom:38px}.decision-invitation>.btn{margin-top:18px}}

@media(min-width:501px) and (max-width:1000px){.hr-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hr-q:nth-child(3){border-left:0;padding-left:0}}