:root {
  --ink: #262119;
  --paper: #ede2c5;
  --cream: #f6efd9;
  --acid: #e6ad37;
  --signal: #cc4a2f;
  --green: #245542;
  --muted: #716957;
  --line: rgba(38,33,25,.25);
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  --mono: "SFMono-Regular", "Roboto Mono", "Cascadia Code", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(rgba(38,33,25,.075) .65px, transparent .65px);
  background-size: 5px 5px;
  font-family: var(--sans);
  line-height: 1.6;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .18em; }
.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 2px solid var(--ink);
  background: rgba(237,226,197,.94);
  backdrop-filter: blur(12px);
}
.site-nav-inner {
  width: min(1380px, calc(100% - 40px));
  min-height: 68px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; font-weight: 850; letter-spacing: .09em; text-decoration: none; }
.nav-links { display:flex; align-items:center; gap:24px; font:700 .72rem/1 var(--mono); letter-spacing:.05em; }
.nav-links a { text-decoration:none; }
.nav-cta { padding:11px 15px; color:var(--cream); background:var(--green); border:1px solid var(--ink); box-shadow:3px 3px 0 var(--acid); }
.breadcrumb { width:min(1180px, calc(100% - 40px)); margin:28px auto 0; font:700 .67rem/1.5 var(--mono); color:var(--muted); }
.breadcrumb a { color:var(--ink); }
.article-hero { width:min(1180px, calc(100% - 40px)); margin:52px auto 0; display:grid; grid-template-columns:minmax(0,1.25fr) minmax(280px,.55fr); gap:7vw; align-items:end; padding-bottom:56px; border-bottom:2px solid var(--ink); }
.article-kicker { margin:0 0 24px; font:800 .72rem/1.3 var(--mono); letter-spacing:.1em; text-transform:uppercase; color:var(--signal); }
h1 { margin:0; max-width:900px; font:700 clamp(3.1rem,7vw,7rem)/.91 var(--serif); letter-spacing:-.065em; }
.article-dek { margin:0; padding-left:18px; border-left:5px solid var(--green); font-size:clamp(1.05rem,1.7vw,1.34rem); line-height:1.55; color:var(--muted); }
.article-meta { width:min(1180px, calc(100% - 40px)); margin:0 auto; padding:18px 0; border-bottom:1px solid var(--line); display:flex; justify-content:space-between; gap:20px; font:700 .66rem/1.5 var(--mono); color:var(--muted); }
.answer-box { width:min(920px, calc(100% - 40px)); margin:64px auto; padding:30px 34px; border:2px solid var(--ink); background:var(--cream); box-shadow:8px 8px 0 var(--acid); }
.answer-box span { display:block; margin-bottom:16px; color:var(--signal); font:850 .7rem/1 var(--mono); letter-spacing:.1em; }
.answer-box p { margin:0; font:700 clamp(1.35rem,2.4vw,2rem)/1.42 var(--serif); }
.article-shell { width:min(1180px, calc(100% - 40px)); margin:0 auto 100px; display:grid; grid-template-columns:260px minmax(0,760px); gap:7vw; align-items:start; }
.toc { position:sticky; top:100px; border-top:2px solid var(--ink); }
.toc strong { display:block; padding:15px 0; border-bottom:1px solid var(--line); font:800 .66rem/1 var(--mono); letter-spacing:.09em; }
.toc a { display:block; padding:11px 0; border-bottom:1px solid var(--line); color:var(--muted); font-size:.8rem; text-decoration:none; }
.toc a:hover { color:var(--signal); }
.article-body section { margin:0 0 72px; scroll-margin-top:100px; }
.section-no { display:block; margin-bottom:16px; color:var(--signal); font:800 .66rem/1 var(--mono); letter-spacing:.08em; }
.article-body h2 { margin:0 0 24px; font:700 clamp(2.25rem,4.5vw,4.35rem)/.98 var(--serif); letter-spacing:-.05em; }
.article-body h3 { margin:34px 0 13px; font-size:1.2rem; line-height:1.25; letter-spacing:-.02em; }
.article-body p { margin:0 0 18px; font-size:1.03rem; line-height:1.78; }
.article-body ul, .article-body ol { margin:20px 0 24px; padding-left:1.25rem; }
.article-body li { margin:10px 0; padding-left:7px; line-height:1.65; }
.framework { list-style:none; padding:0 !important; counter-reset:steps; border-top:2px solid var(--ink); }
.framework li { counter-increment:steps; margin:0; padding:22px 0; display:grid; grid-template-columns:56px 1fr; gap:14px; border-bottom:1px solid var(--line); }
.framework li::before { content:"0" counter(steps); color:var(--signal); font:800 .72rem/1.4 var(--mono); }
.framework b { display:block; margin-bottom:6px; }
.data-grid { display:grid; grid-template-columns:1fr 1fr; border:2px solid var(--ink); background:var(--cream); }
.data-grid div { min-height:165px; padding:22px; border-bottom:1px solid var(--line); }
.data-grid div:nth-child(odd) { border-right:1px solid var(--line); }
.data-grid b { display:block; margin-bottom:10px; color:var(--green); font:800 .69rem/1.3 var(--mono); letter-spacing:.06em; }
.poc-card { padding:30px; color:var(--cream); background:var(--green); border:2px solid var(--ink); box-shadow:8px 8px 0 var(--signal); }
.poc-card h3 { margin-top:0; color:var(--acid); }
.poc-card p, .poc-card li { color:var(--cream); }
.failure-list { list-style:none; padding:0 !important; border-top:1px solid var(--ink); }
.failure-list li { margin:0; padding:18px 0; display:grid; grid-template-columns:160px 1fr; gap:24px; border-bottom:1px solid var(--line); }
.failure-list b { color:var(--signal); }
.sources { padding:26px; border:1px solid var(--ink); background:rgba(246,239,217,.5); }
.sources h2 { font-size:2.2rem; }
.sources ol { margin-bottom:0; }
.sources a { font-weight:700; }
.faq { border-top:2px solid var(--ink); }
.faq details { border-bottom:1px solid var(--line); }
.faq summary { padding:20px 32px 20px 0; cursor:pointer; font-weight:780; list-style:none; position:relative; }
.faq summary::after { content:"+"; position:absolute; right:2px; color:var(--signal); }
.faq details[open] summary::after { content:"−"; }
.faq details p { padding:0 0 20px; color:var(--muted); }
.related { padding:72px max(20px, calc((100vw - 1180px)/2)); background:var(--ink); color:var(--cream); }
.related h2 { margin:0 0 34px; font:700 clamp(2.4rem,5vw,5rem)/.95 var(--serif); letter-spacing:-.05em; }
.related-grid { display:grid; grid-template-columns:repeat(3,1fr); border-top:1px solid #4b443a; }
.related a { min-height:210px; padding:22px 22px 22px 0; border-right:1px solid #4b443a; text-decoration:none; }
.related a + a { padding-left:22px; }
.related small { color:var(--acid); font:800 .63rem/1 var(--mono); letter-spacing:.08em; }
.related strong { display:block; margin-top:60px; font:700 1.35rem/1.25 var(--serif); }
.site-footer { padding:32px max(20px, calc((100vw - 1180px)/2)); display:flex; justify-content:space-between; gap:24px; border-top:2px solid var(--ink); font:.72rem/1.5 var(--mono); }
.hub-hero { width:min(1380px, calc(100% - 40px)); margin:70px auto 0; padding:50px 0 70px; border-block:2px solid var(--ink); display:grid; grid-template-columns:1.3fr .7fr; gap:7vw; align-items:end; }
.hub-hero h1 { max-width:900px; }
.hub-hero p { margin:0; font-size:1.25rem; line-height:1.65; color:var(--muted); }
.guide-grid { width:min(1380px, calc(100% - 40px)); margin:70px auto 100px; display:grid; grid-template-columns:repeat(2,1fr); border:2px solid var(--ink); }
.guide-card { min-height:390px; padding:28px; position:relative; border-bottom:1px solid var(--ink); text-decoration:none; background:var(--cream); transition:background .2s, color .2s; }
.guide-card:nth-child(odd) { border-right:1px solid var(--ink); }
.guide-card:nth-last-child(-n+2) { border-bottom:0; }
.guide-card:hover { color:var(--cream); background:var(--green); }
.guide-card small { font:800 .66rem/1 var(--mono); color:var(--signal); letter-spacing:.08em; }
.guide-card h2 { max-width:570px; margin:70px 0 18px; font:700 clamp(2.1rem,4vw,4.3rem)/.98 var(--serif); letter-spacing:-.05em; }
.guide-card p { max-width:550px; color:var(--muted); }
.guide-card:hover p { color:rgba(246,239,217,.75); }
@media (max-width: 850px) {
  .nav-links > a:not(.nav-cta) { display:none; }
  .article-hero, .hub-hero { grid-template-columns:1fr; }
  .article-shell { grid-template-columns:1fr; }
  .toc { position:static; }
  .article-hero { margin-top:34px; }
  .article-meta { flex-direction:column; }
  .related-grid, .guide-grid { grid-template-columns:1fr; }
  .related a { border-right:0; border-bottom:1px solid #4b443a; padding-left:0 !important; }
  .guide-card, .guide-card:nth-child(odd), .guide-card:nth-last-child(-n+2) { border-right:0; border-bottom:1px solid var(--ink); }
  .guide-card:last-child { border-bottom:0; }
}
@media (max-width: 560px) {
  .site-nav-inner, .breadcrumb, .article-hero, .article-meta, .article-shell, .answer-box, .hub-hero, .guide-grid { width:min(100% - 28px, 1180px); }
  h1 { font-size:3.05rem; }
  .data-grid { grid-template-columns:1fr; }
  .data-grid div:nth-child(odd) { border-right:0; }
  .failure-list li { grid-template-columns:1fr; gap:4px; }
  .site-footer { flex-direction:column; }
}