/* modelsaar.com — one stylesheet, no framework. Tokens first; components below. */
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:600;font-display:swap;src:url(fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2")}

:root{
  --bg:#fbfbf9;--surface:#f1f3ef;--surface-2:#e7ebe6;--ink:#16211f;--muted:#55635f;--line:#d6dcd6;
  --brand:#0f5c50;--brand-ink:#0b4238;--brand-soft:#dcebe6;--accent:#d99a12;--accent-soft:#f7e9c6;
  --ok:#1f7a4d;--no:#b3402b;--no-soft:#f6e1dc;--code-bg:#1a2422;--code-ink:#e9eee9;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --measure:68ch;--gutter:clamp(16px,4vw,40px);--radius:6px;
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0f1715;--surface:#16211e;--surface-2:#1e2b27;--ink:#e8ece8;--muted:#9fada7;--line:#2b3a35;
    --brand:#62cdb1;--brand-ink:#9fe3cf;--brand-soft:#17332d;--accent:#f0b84a;--accent-soft:#3a2d10;
    --ok:#5fc48f;--no:#f08a73;--no-soft:#3a1f19;--code-bg:#0b1210;--code-ink:#dfe6e0;
  }
}
:root[data-theme="dark"]{
  --bg:#0f1715;--surface:#16211e;--surface-2:#1e2b27;--ink:#e8ece8;--muted:#9fada7;--line:#2b3a35;
  --brand:#62cdb1;--brand-ink:#9fe3cf;--brand-soft:#17332d;--accent:#f0b84a;--accent-soft:#3a2d10;
  --ok:#5fc48f;--no:#f08a73;--no-soft:#3a1f19;--code-bg:#0b1210;--code-ink:#dfe6e0;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto}
a{color:var(--brand);text-decoration-thickness:1px;text-underline-offset:.15em}
a:hover{color:var(--brand-ink)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:2px}
h1,h2,h3,h4{font-weight:600;line-height:1.15;letter-spacing:-.012em;margin:0 0 .5em;text-wrap:balance}
h1{font-size:clamp(2.1rem,4.6vw,3.3rem)}
h2{font-size:clamp(1.5rem,2.6vw,2rem);margin-top:0}
h3{font-size:1.2rem}
p,ul,ol,table,pre,blockquote,dl{margin:0 0 1.1em}
p,li,dd{max-width:var(--measure)}
.small{font-size:.9rem;color:var(--muted)}
code,kbd,pre{font-family:var(--mono);font-size:.92em}
code{background:var(--surface-2);padding:.08em .35em;border-radius:4px;overflow-wrap:anywhere}
pre{background:var(--code-bg);color:var(--code-ink);padding:14px 16px;border-radius:var(--radius);overflow:auto;line-height:1.5;max-width:100%}
pre code{background:none;padding:0;color:inherit;font-size:.9rem}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;vertical-align:top;padding:.55em .7em;border-bottom:1px solid var(--line)}
th{font-weight:600;color:var(--muted);font-size:.85rem}
.table-wrap{overflow-x:auto;margin:0 0 1.5em}
blockquote{border-left:3px solid var(--brand);margin-left:0;padding-left:1em;color:var(--muted)}
dt{font-weight:600}dd{margin:0 0 .8em}

/* layout */
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#1a1400;padding:.5em .8em;border-radius:4px;z-index:20}
.skip:focus{left:8px}
.preview-banner{background:var(--accent-soft);color:var(--ink);text-align:center;padding:.4em var(--gutter);font-size:.9rem;border-bottom:1px solid var(--line)}
.top{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:14px var(--gutter);border-bottom:1px solid var(--line);flex-wrap:wrap}
.wordmark{display:inline-flex;align-items:center;gap:.5rem;font-weight:600;font-size:1.15rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.wordmark .mark{color:var(--brand)}
.main-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:.2rem 1.1rem;flex-wrap:wrap}
.main-nav a{color:var(--ink);text-decoration:none;font-size:.95rem;padding:.3em 0;border-bottom:2px solid transparent}
.main-nav a:hover,.main-nav a[aria-current="page"]{border-bottom-color:var(--brand);color:var(--brand-ink)}
@media (max-width:760px){
  .main-nav{width:100%}
  .main-nav ul{gap:.1rem .9rem}
  .main-nav a{font-size:.9rem;padding:.2em 0}
}
main{padding:0 var(--gutter);max-width:1120px;margin:0 auto}
section{padding:3.2rem 0;border-bottom:1px solid var(--line)}
section:last-of-type{border-bottom:0}
.lede{font-size:1.2rem;color:var(--muted);max-width:60ch}
.crumbs ol{list-style:none;padding:0;margin:1rem 0 0;display:flex;gap:.5rem;flex-wrap:wrap;font-size:.88rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:.5rem;color:var(--line)}
.foot{border-top:1px solid var(--line);padding:2.5rem var(--gutter);margin-top:2rem}
.foot-grid{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr;gap:2rem}
.foot-links{list-style:none;padding:0;margin:0;columns:2;gap:2rem}
.foot-links li{margin-bottom:.4em}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr}.foot-links{columns:1}}

/* buttons */
.btn{display:inline-block;font:600 1rem/1 var(--sans);padding:.8em 1.2em;border-radius:var(--radius);text-decoration:none;border:1.5px solid var(--brand);color:var(--brand-ink);background:transparent}
.btn.primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn.primary:hover{background:var(--brand-ink);border-color:var(--brand-ink)}
.btn:hover{background:var(--brand-soft)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn.primary{color:#07211c}}
:root[data-theme="dark"] .btn.primary{color:#07211c}
.actions{display:flex;gap:.8rem;flex-wrap:wrap;margin:1.4rem 0}

/* status pill (one, truthful) */
.status{display:inline-flex;align-items:center;gap:.5em;font-size:.88rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:.25em .8em .25em .6em}
.status::before{content:"";width:.6em;height:.6em;border-radius:50%;background:var(--accent)}

/* command block with copy button */
.cmd{position:relative;margin:1rem 0 1.4rem;max-width:var(--measure)}
.cmd pre{margin:0;padding-right:5.6rem}
.cmd .copy{position:absolute;top:8px;right:8px;font:600 .8rem var(--sans);padding:.35em .7em;border-radius:4px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08);color:var(--code-ink);cursor:pointer}
.cmd .copy:hover{background:rgba(255,255,255,.18)}
.cmd .copy[hidden]{display:none}
.cmd-note{font-size:.88rem;color:var(--muted);margin:-.8rem 0 1.4rem}

/* hero */
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:3rem;align-items:center;padding:3.5rem 0 3rem}
.hero>div{min-width:0}
.hero h1{margin-bottom:.6rem}
.hero .lede{margin-bottom:.4rem}
@media (max-width:900px){.hero{grid-template-columns:1fr;gap:2rem}}

/* the decision record — the one memorable element */
.decision{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;font-size:.92rem}
.decision-head{display:flex;justify-content:space-between;gap:1rem;align-items:baseline;padding:.8rem 1rem;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.decision-head strong{color:var(--ink);font-weight:600}
.decision-req{padding:.9rem 1rem;border-bottom:1px solid var(--line)}
.decision-req p{margin:0 0 .3rem}
.facts{display:flex;flex-wrap:wrap;gap:.35rem .5rem;margin:.4rem 0 0;padding:0;list-style:none}
.facts li{background:var(--surface-2);border-radius:4px;padding:.15em .55em;font-size:.84rem;font-family:var(--mono)}
.decision table{margin:0}
.decision th,.decision td{padding:.55rem 1rem;border-bottom:1px solid var(--line)}
.decision tr:last-child td{border-bottom:0}
.decision .chosen td{background:var(--accent-soft);border-left:4px solid var(--accent)}
.decision td:not(:first-child){color:var(--muted)}
.decision .chosen td:not(:first-child){color:var(--ink)}
.yes{color:var(--ok);font-weight:600}.nope{color:var(--no);font-weight:600}
.decision-why{padding:.9rem 1rem;border-top:1px solid var(--line);background:var(--bg)}
.decision-why p{margin:0}
.decision-foot{padding:.6rem 1rem;font-size:.8rem;color:var(--muted);border-top:1px solid var(--line)}
.scenario-tabs{display:flex;gap:.4rem;flex-wrap:wrap;margin:0 0 1rem;padding:0;list-style:none}
.scenario-tabs button{font:600 .9rem var(--sans);padding:.45em .9em;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.scenario-tabs button[aria-selected="true"]{background:var(--brand);border-color:var(--brand);color:#fff}
:root[data-theme="dark"] .scenario-tabs button[aria-selected="true"]{color:#07211c}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .scenario-tabs button[aria-selected="true"]{color:#07211c}}
details.scenario{border:1px solid var(--line);border-radius:8px;margin:0 0 .8rem;background:var(--surface)}
details.scenario>summary{cursor:pointer;padding:.8rem 1rem;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:1rem}
details.scenario>summary::-webkit-details-marker{display:none}
details.scenario>summary::after{content:"+";color:var(--muted);font-weight:400}
details.scenario[open]>summary::after{content:"–"}
details.scenario>summary .small{font-weight:400}
details.scenario .decision{border:0;border-top:1px solid var(--line);border-radius:0}
.js-tabs details.scenario>summary{display:none}
.js-tabs details.scenario{border:0;background:transparent;margin:0}
.js-tabs details.scenario .decision{border:1px solid var(--line);border-radius:8px}

/* generic sections */
.two{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem}
.two>*,.three>*,.steps>li,.foot-grid>*{min-width:0}
.three{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem}
@media (max-width:860px){.two,.three{grid-template-columns:1fr}}
.steps{counter-reset:step;list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:2rem}
.steps>li{counter-increment:step;max-width:none}
.steps>li h3::before{content:counter(step) ". ";color:var(--brand)}
@media (max-width:860px){.steps{grid-template-columns:1fr}}
.callout{border-left:3px solid var(--accent);background:var(--surface);padding:.9rem 1rem;border-radius:0 var(--radius) var(--radius) 0;margin:0 0 1.4rem;max-width:var(--measure)}
.callout p:last-child{margin-bottom:0}
.evidence{font-size:.82rem;border-radius:4px;padding:.1em .5em;white-space:nowrap}
.evidence.live{background:var(--brand-soft);color:var(--brand-ink)}
.evidence.fixture{background:var(--surface-2)}
.evidence.docs{background:var(--accent-soft)}
.evidence.not-run{background:var(--no-soft);color:var(--no)}
.faq details{border-bottom:1px solid var(--line);padding:.6rem 0}
.faq summary{cursor:pointer;font-weight:600;padding:.3rem 0}
.faq details p{margin:.6rem 0 .4rem}
.doc{max-width:78ch}
.doc-head{margin:1.5rem 0 2rem;padding-bottom:1rem;border-bottom:1px solid var(--line)}
.doc h2{margin-top:2.2rem}.doc h3{margin-top:1.6rem}
.doc table{display:block;overflow-x:auto;max-width:100%}
.doc p,.doc li,.doc td{overflow-wrap:anywhere}
.docs-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem 2rem}
.docs-list li{max-width:none;padding:.6rem 0;border-bottom:1px solid var(--line)}
.docs-list a{font-weight:600}
.docs-list p{margin:.2rem 0 0;font-size:.92rem;color:var(--muted)}
figure{margin:0 0 1.5rem}figcaption{font-size:.88rem;color:var(--muted);margin-top:.4rem}
.diagram{background:#fbfbf9;border:1px solid var(--line);border-radius:8px;padding:1rem}
.kv{display:grid;grid-template-columns:max-content 1fr;gap:.3rem 1.2rem;font-size:.95rem}
.kv dt{font-weight:600}.kv dd{margin:0}
.toc{font-size:.92rem;background:var(--surface);border-radius:var(--radius);padding:.8rem 1rem;margin:0 0 1.6rem;max-width:var(--measure)}
.toc ul{margin:0;padding-left:1.1em}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}