@font-face{font-family:Cormorant;src:url(cormorant.woff2) format('woff2');font-weight:300 700;font-display:swap}
@font-face{font-family:Cormorant;src:url(cormorant-italic.woff2) format('woff2');font-weight:300 700;font-style:italic;font-display:swap}
@font-face{font-family:Inter;src:url(inter.woff2) format('woff2');font-weight:100 900;font-display:swap}
:root{--paper:#f9f8f4;--ink:#262f2e;--muted:#737b75;--line:#dedfd6;--green:#3e6053;--soft:#edf0e8;--sand:#ece5d6;--amber:#8f6335;--serif:Cormorant,Georgia,serif;--sans:Inter,Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font:22px/1.75 var(--serif);-webkit-font-smoothing:antialiased}a{color:var(--green);text-decoration-thickness:1px;text-underline-offset:4px}a:hover{color:#153e2b}button,input,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--green);outline-offset:5px}.skip{position:fixed;top:-80px;left:20px;background:var(--paper);padding:10px;z-index:20}.skip:focus{top:8px}.site-header{height:76px;border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(249,248,244,.97);z-index:10;display:flex;align-items:center;padding:0 42px;gap:30px}.wordmark{font:600 30px/1 var(--serif);text-decoration:none;letter-spacing:-1px;color:var(--ink)}.header-context{font:10px/1.4 var(--sans);text-transform:uppercase;letter-spacing:1.7px;color:var(--muted);border-left:1px solid var(--line);padding-left:26px}.header-tools{margin-left:auto;display:flex;gap:24px;font:11px var(--sans)}.header-tools a{text-decoration:none}.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:3px;padding:8px 12px;font:11px var(--sans);color:var(--ink)}.reading-progress{position:fixed;z-index:12;top:74px;left:0;height:2px;background:var(--green);width:0;transition:width .15s}.shell{display:grid;grid-template-columns:240px minmax(0,1fr);max-width:1480px;margin:0 auto}.sidebar{padding:40px 24px 40px 42px;border-right:1px solid var(--line);position:sticky;top:76px;max-height:calc(100vh - 76px);overflow-y:auto;align-self:start;scrollbar-width:thin}.nav-label,.eyebrow{font:10px/1.5 var(--sans);letter-spacing:1.8px;text-transform:uppercase;color:var(--muted)}.nav-label{margin:23px 0 8px}.nav-label:first-child{margin-top:0}.sidebar ol{list-style:none;margin:0;padding:0}.sidebar li a{font:12px/1.45 var(--sans);color:#616b64;text-decoration:none;display:flex;gap:10px;padding:8px 0}.sidebar .number{font-size:10px;color:#9a9f96;padding-top:1px;min-width:19px}.sidebar a[aria-current=page]{color:#294c3b;font-weight:600}.sidebar a[aria-current=page] .number{color:var(--green)}.sidebar a:hover{color:#1d4731}.sidebar-extra{border-top:1px solid var(--line);padding-top:17px;margin-top:23px;display:grid;gap:10px}.sidebar-extra a{font:11px/1.5 var(--sans);text-decoration:none;color:var(--muted)}.main{min-width:0;padding:68px 72px 30px}.page-top{display:flex;align-items:center;gap:20px;margin-bottom:24px}.page-top .rule{height:1px;background:var(--line);flex:1}.chapter-number{font:12px var(--sans);color:var(--green)}h1,h2,h3,h4{font-family:var(--serif);font-weight:500;line-height:1.12;letter-spacing:-.02em}h1{font-size:clamp(42px,4.5vw,66px);max-width:880px;margin:22px 0 26px}h2{font-size:35px;margin:60px 0 23px}h3{font-size:27px;margin:36px 0 14px}h4{font-size:23px}.lede{font:26px/1.48 var(--serif);color:#58665c;max-width:710px;margin:0 0 30px}.chapter-meta{font:10px/1.6 var(--sans);color:var(--muted);letter-spacing:.3px;display:flex;gap:20px;margin-bottom:36px}.chapter-head{border-bottom:1px solid var(--line);padding-bottom:5px;margin-bottom:35px}.article{max-width:800px}.article p{margin:0 0 22px}.article ul,.article ol{padding-left:25px;margin:20px 0 28px}.article li{padding-left:3px;margin:10px 0}.article strong{font-weight:600}.article blockquote{border-left:2px solid #a3b2a2;margin:32px 0;padding:4px 0 4px 24px;color:#546257}.article blockquote p{margin:0}.article hr{border:0;border-top:1px solid var(--line);margin:45px 0}.article :is(h2,h3,h4){scroll-margin-top:100px}.article h2:first-child{margin-top:16px}.citation{font:10px var(--sans);vertical-align:super;letter-spacing:.2px;padding:0 2px;text-decoration:none;white-space:nowrap}.article code{font:12px/1.65 ui-monospace,SFMono-Regular,Menlo,monospace;background:#eff0e9;padding:2px 4px;border-radius:2px;overflow-wrap:anywhere}.article pre{background:#f0f1eb;border:1px solid var(--line);border-radius:3px;padding:21px;overflow:auto;max-width:100%;line-height:1.6;white-space:pre}.article pre code{padding:0;overflow-wrap:normal}.article .table-scroll{max-width:100%;overflow-x:auto;margin:30px 0}.article table{border-collapse:collapse;min-width:100%;font:12px/1.65 var(--sans);text-align:left}.article th{font-weight:500;background:#edf0e8;vertical-align:bottom}.article td{vertical-align:top}.article th,.article td{padding:13px 16px;border-bottom:1px solid var(--line);min-width:130px}.article th:first-child,.article td:first-child{padding-left:12px}.article img{max-width:100%;height:auto}.katex-display{overflow-x:auto;overflow-y:hidden;padding:12px 0;font-size:.95em}.chapter-toc{border:1px solid var(--line);border-radius:3px;padding:14px 20px;margin:24px 0 36px;max-width:800px}.chapter-toc summary{font:11px var(--sans);cursor:pointer;color:var(--muted);padding:4px 0}.chapter-toc ul{padding-left:16px;margin:15px 0 4px;columns:2;column-gap:35px}.chapter-toc li{font:12px/1.6 var(--sans);margin:0 0 9px;break-inside:avoid}.chapter-toc a{text-decoration:none}.chapter-footer{border-top:1px solid var(--line);margin-top:66px;padding-top:25px;display:flex;justify-content:space-between;gap:30px;max-width:800px}.chapter-footer a{text-decoration:none;max-width:46%;font:24px/1.1 var(--serif)}.chapter-footer small{display:block;font:9px/1.5 var(--sans);color:var(--muted);letter-spacing:1.4px;text-transform:uppercase;margin-bottom:9px}.chapter-footer a:last-child{text-align:right}.site-footer{font:10px/1.6 var(--sans);color:var(--muted);margin:70px 0 15px;border-top:1px solid var(--line);padding-top:20px;display:flex;justify-content:space-between;gap:25px}.site-footer a{color:inherit}.home{padding-top:74px}.home .hero-title{font-size:clamp(70px,9vw,124px);margin:10px 0 18px;line-height:.95;letter-spacing:-.05em}.home .hero-subtitle{font:40px/1.12 var(--serif);max-width:690px;margin:25px 0 24px;letter-spacing:-.02em}.home .hero-copy{font:23px/1.65 var(--serif);color:#5f695f;max-width:650px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:33px 0 45px}.button{border:1px solid var(--line);border-radius:3px;font:11px/1.5 var(--sans);text-decoration:none;padding:12px 18px;background:transparent;color:var(--green)}.button.primary{background:var(--green);border-color:var(--green);color:#fff}.button:hover{background:#e7ece3}.button.primary:hover{background:#2f5042}.assurance-chain{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:27px 0 26px;margin:44px 0 62px;display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.chain-step{position:relative;padding-right:16px}.chain-step:not(:last-child):after{content:'→';position:absolute;right:0;top:16px;color:#a1ad9c;font-size:15px}.chain-step small{font:9px var(--sans);color:var(--muted);letter-spacing:1px}.chain-step span{display:block;font:21px/1.2 var(--serif);margin:9px 0}.chain-step p{font:10px/1.55 var(--sans);color:var(--muted);margin:0}.contents-header{display:flex;justify-content:space-between;align-items:baseline;border-bottom:1px solid var(--line)}.contents-header h2{margin:0 0 24px}.contents-header span{font:10px var(--sans);color:var(--muted)}.chapter-list{list-style:none;padding:0;margin:0}.chapter-card{display:grid;grid-template-columns:37px minmax(0,1fr) 30px;gap:16px;padding:24px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}.chapter-card .number{font:11px var(--sans);color:var(--muted);padding-top:6px}.chapter-card h3{font-size:27px;margin:0 0 8px}.chapter-card p{font:12px/1.5 var(--sans);color:var(--muted);margin:0}.chapter-card .arrow{font-size:20px;color:#9aa695;padding-top:2px}.chapter-card:hover h3{color:var(--green)}.chapter-card:hover .arrow{transform:translateX(4px)}.home-note{margin-top:50px;display:grid;grid-template-columns:1fr 1fr;gap:36px}.home-note h3{margin:8px 0 15px}.home-note p{font:13px/1.8 var(--sans);color:var(--muted)}.feature{margin:38px 0 48px;padding:26px;border:1px solid var(--line);background:#f3f4ee;border-radius:3px}.feature h2,.feature h3{margin:10px 0 15px}.feature .caption{font:11px/1.7 var(--sans);color:var(--muted)}.feature button{font:11px var(--sans);border:1px solid #ccd3c7;background:var(--paper);color:#455c4d;border-radius:3px;padding:10px 13px}.feature button[aria-pressed=true]{background:var(--green);color:white;border-color:var(--green)}.switches{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.dependency-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0}.dependency-node{border:1px solid #cdd8c7;background:#edf2e9;padding:14px;font:11px/1.6 var(--sans);border-radius:3px}.dependency-node strong{display:block;font-weight:500;font-size:12px}.dependency-node span{display:block;font-size:10px;color:#66745e;margin-top:5px}.dependency-node.stale{background:#f2e9dd;border-color:#d9c4a9}.dependency-node.stale span{color:var(--amber)}.feature-output{font:15px/1.7 Georgia,serif;min-height:3.5em;margin-top:20px}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:25px 0}.result-card{border:1px solid var(--line);border-radius:3px;padding:22px}.result-card .result{font:27px/1.1 var(--serif);margin:8px 0 18px}.result-card p{font:12px/1.8 var(--sans);margin:5px 0}.result-card.fail{border-top:3px solid #b08c61}.result-card.pass{border-top:3px solid #668064}.trace-view{border:1px solid var(--line);background:#eef0e8;padding:20px;min-height:160px}.trace-action{font:25px/1.2 var(--serif);margin-bottom:16px}.state-fields{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;font:11px/1.6 var(--sans)}.state-fields span{color:var(--muted);display:block;font-size:9px;text-transform:uppercase;letter-spacing:.8px}.trace-controls{display:flex;align-items:center;gap:15px;margin:15px 0}.trace-controls input{flex:1;min-width:0;accent-color:var(--green)}.trace-controls output{font:11px var(--sans);white-space:nowrap}.calculator{display:grid;grid-template-columns:1fr 1fr;gap:24px}.calc-fields{display:grid;gap:13px}.calc-fields label{font:11px/1.5 var(--sans);color:var(--muted);display:flex;align-items:center;justify-content:space-between;gap:16px}.calc-fields input{width:104px;background:var(--paper);border:1px solid #ccd1c6;padding:9px;border-radius:3px;font:12px var(--sans);color:var(--ink)}.calc-output{background:#e8eee3;padding:26px;border-radius:3px}.calc-output .big{font:52px/1.1 var(--serif);color:var(--green);margin:8px 0 20px;letter-spacing:-1px}.calc-output dl{font:11px/1.6 var(--sans);display:grid;grid-template-columns:1fr auto;gap:9px}.calc-output dt,.calc-output dd{margin:0}.calc-output dd{text-align:right}.calc-output .calc-status{font:11px/1.7 var(--sans);margin-top:20px;color:#58664f}.data-fold{font:11px var(--sans);margin:28px 0}.data-fold summary{cursor:pointer;color:var(--muted)}.data-fold pre{max-height:480px}.print-section{break-before:page;max-width:850px;margin:0 auto 90px}.print-section .chapter-head h1{font-size:52px}.print-cover{min-height:75vh;display:flex;flex-direction:column;justify-content:center;margin-bottom:100px}.print-cover h1{font-size:110px}.print-cover .lede{font-size:40px}.print-main{max-width:1030px;margin:0 auto;padding:60px 60px}.print-main .article{max-width:none}.print-controls{display:flex;gap:15px;font:12px var(--sans);margin-bottom:40px}.print-controls button{border:1px solid var(--line);background:var(--paper);padding:10px 18px;border-radius:3px;color:var(--green)}
@media(min-width:1500px){.main{padding-left:90px;padding-right:90px}}@media(max-width:1100px){.shell{grid-template-columns:210px minmax(0,1fr)}.sidebar{padding-left:28px}.main{padding:50px 40px 30px}.site-header{padding:0 28px}.header-context{font-size:9px}.assurance-chain{gap:9px}.chain-step span{font-size:19px}.chain-step p{font-size:9px}}
@media(max-width:780px){body{font-size:20px;line-height:1.7}.site-header{height:66px;padding:0 20px;gap:18px}.wordmark{font-size:28px}.header-context{display:none}.header-tools{gap:18px;font-size:10px}.header-tools .desktop-link{display:none}.menu-toggle{display:block}.reading-progress{top:64px}.shell{display:block}.sidebar{display:none;position:fixed;top:66px;left:0;bottom:0;width:290px;z-index:9;background:var(--paper);padding:28px;border-right:1px solid var(--line);max-height:calc(100vh - 66px);box-shadow:20px 0 45px #25372618}.sidebar.open{display:block}.main{padding:38px 23px 20px}.home{padding-top:48px}.home .hero-title{font-size:86px}.home .hero-subtitle{font-size:33px}.home .hero-copy{font-size:21px}.lede{font-size:24px}h1{font-size:43px}h2{font-size:31px;margin-top:45px}h3{font-size:26px}.chapter-meta{flex-wrap:wrap;gap:8px 16px}.chapter-toc ul{columns:1}.assurance-chain{grid-template-columns:1fr 1fr;gap:24px 20px;margin:33px 0 45px}.chain-step{padding-right:25px}.chain-step:not(:last-child):after{right:10px}.chain-step:last-child{grid-column:1/-1}.chain-step span{font-size:23px}.chain-step p{font-size:10px}.chapter-card{grid-template-columns:25px minmax(0,1fr) 22px;gap:10px;padding:22px 0}.chapter-card h3{font-size:25px}.chapter-card p{font-size:11px}.home-note{grid-template-columns:1fr;gap:12px}.feature{padding:18px}.dependency-grid{grid-template-columns:1fr 1fr}.result-grid{grid-template-columns:1fr}.calculator{grid-template-columns:1fr}.site-footer{display:block;margin-top:50px}.site-footer span{display:block;margin-bottom:9px}.state-fields{grid-template-columns:1fr 1fr}.print-main{padding:35px 23px}.print-cover h1{font-size:80px}.print-cover .lede{font-size:30px}.contents-header span{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.print-trace{display:none}

/* Print rhythm is kept together so later overrides cannot compress the PDF. */
@media print {
  @page { size:A4; margin:22mm 23mm; }
  .site-header,.sidebar,.reading-progress,.chapter-toc,.chapter-footer,
  .site-footer,.print-controls,.skip,.switches,.trace-controls,
  [data-dependencies] { display:none!important; }
  body { background:white; color:#222; font-size:11pt; line-height:1.6; }
  .shell { display:block; }
  .main,.print-main { padding:0; max-width:none; }
  .article,.print-section { max-width:none; }
  .print-section { margin-bottom:0; break-before:page; }
  .print-main > .print-section:first-of-type { break-before:auto; }
  .chapter-head { margin-bottom:24pt; break-inside:avoid; break-after:avoid; }
  .chapter-head h1,.print-section .chapter-head h1 {
    font-size:33pt; margin:16pt 0 20pt;
  }
  .chapter-meta { font-size:8pt; margin-bottom:24pt; }
  h2 { font-size:23pt; margin:25pt 0 13pt; }
  h3 { font-size:18pt; margin:24pt 0 12pt; }
  h4 { font-size:14pt; margin:22pt 0 10pt; }
  h2,h3,h4 { break-after:avoid; }
  .article p,.article li { orphans:3; widows:3; }
  .article p { margin-bottom:10pt; }
  .article ul,.article ol { margin:14pt 0 18pt; }
  .article li { margin:8pt 0; }
  .article blockquote { margin:22pt 0; padding:4pt 0 4pt 18pt; }
  .article .table-scroll { overflow:visible; margin:22pt 0; }
  .article table { font-size:8.5pt; line-height:1.6; }
  .article th,.article td { padding:7pt 7pt; min-width:0; }
  .article tr { break-inside:avoid; }
  .article pre,.article pre code { font-size:8pt; white-space:pre-wrap; overflow-wrap:anywhere; }
  .article a { color:inherit; }
  .article .citation { font-size:7pt; }
  .feature,.result-card { break-inside:avoid; }
  .feature { background:white; padding:18pt; }
  .feature .caption { font-size:8.5pt; line-height:1.65; }
  .data-fold:not([open]) { display:none; }
  .calculator { display:block; }
  .calc-fields { display:none; }
  .result-grid { break-inside:avoid; gap:12pt; }
  .result-card { padding:16pt; }
  .result-card .result { font-size:19pt; margin:8pt 0 13pt; }
  .print-trace { display:block; }
  .trace-feature .trace-view,.trace-feature [data-trace-note] { display:none; }
  .trace-feature { padding:15pt; }
  .print-trace table { font-size:8.5pt; }
  .print-section h1,.print-section h2 { color:#253e30; }
  #chapter-sources h4 + p {
    break-after:avoid; font-family:Inter,Arial,sans-serif;
    font-size:9pt; line-height:1.6;
  }
  #chapter-sources .article h4 { font-size:13.5pt; }
  #chapter-sources p:has(> a[id]:only-child) { margin:0; break-after:avoid; }
  #chapter-sources .article ul { margin:12pt 0 0; }
  #chapter-sources .article li { margin:5pt 0; }
  /* Keep the short architecture close and the cell tables with their context. */
  #chapter-architecture .article p { margin-bottom:9pt; }
  #chapter-architecture h2 { margin-top:23pt; }
  #chapter-first-cell .table-scroll,
  #chapter-programme .table-scroll { break-inside:avoid; }
}