:root {
  --ink: #123442;
  --ink-2: #244c59;
  --paper: #f6f2e9;
  --mint: #d9eee8;
  --teal: #65b9aa;
  --coral: #f09a82;
  --line: rgba(18, 52, 66, 0.18);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-geist-sans), Arial, sans-serif; }
a { color: inherit; text-decoration: none; }
p { line-height: 1.65; }
.site-header { position: relative; z-index: 10; background: rgba(246,242,233,.92); backdrop-filter: blur(14px); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.site-header { min-height: 84px; display: flex; align-items: center; gap: 38px; padding: 18px clamp(22px, 5vw, 76px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 750; font-size: 18px; margin-right: auto; letter-spacing: -0.02em; }
.brand-mark { width: 38px; height: 38px; border-radius: 12px 12px 12px 3px; background: var(--ink); color: white; display: grid; place-items: center; font-size: 12px; letter-spacing: .08em; }
nav { display: flex; gap: 30px; font-size: 14px; color: var(--ink-2); }
nav a:hover { color: var(--teal); }
.vv-link { border: 1px solid var(--ink); border-radius: 999px; padding: 11px 17px; font-size: 13px; font-weight: 700; }

.hero { min-height: 640px; padding: 74px clamp(22px, 6vw, 96px) 62px; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, .9fr); align-items: center; gap: clamp(42px, 8vw, 120px); background: radial-gradient(circle at 83% 12%, rgba(101,185,170,.22), transparent 28%), linear-gradient(135deg, rgba(255,255,255,.45), transparent 48%); }
.eyebrow { font-family: var(--font-geist-mono), monospace; text-transform: uppercase; letter-spacing: .13em; font-size: 12px; font-weight: 700; color: #337f74; }
h1 { font-size: clamp(52px, 7vw, 96px); line-height: .96; letter-spacing: -.07em; margin: 18px 0 26px; font-weight: 680; max-width: 850px; }
h1 em { font-family: Georgia, serif; font-weight: 400; color: #337f74; }
.hero-intro { max-width: 690px; font-size: clamp(17px, 2vw, 21px); line-height: 1.6; color: var(--ink-2); }
.search-shell { margin-top: 34px; max-width: 670px; min-height: 62px; display: grid; grid-template-columns: 34px 1fr auto; align-items: center; gap: 6px; background: white; border: 1px solid var(--line); border-radius: 18px; padding: 7px 8px 7px 18px; box-shadow: 0 18px 45px rgba(18,52,66,.08); }
.search-shell > span { font-size: 24px; }
.search-shell input { min-width: 0; border: 0; outline: 0; font: inherit; color: var(--ink); background: transparent; padding: 12px 6px; }
.search-shell input::placeholder { color: #78919a; }
.search-shell button { border: 0; background: var(--ink); color: white; border-radius: 12px; padding: 14px 20px; font: inherit; font-size: 14px; font-weight: 700; cursor: pointer; }
.search-note { font-size: 12px; color: #607c86; margin: 12px 4px; }

.result-card { background: #fffdf8; border: 1px solid var(--line); border-radius: 26px; padding: 26px; box-shadow: 0 28px 80px rgba(18,52,66,.13); transform: rotate(1.4deg); }
.result-card-top { display: flex; justify-content: space-between; gap: 18px; align-items: flex-start; }
.result-card h2 { margin: 6px 0 3px; font-size: 28px; letter-spacing: -.04em; }
.mini-label, .alias { margin: 0; }
.mini-label { font-family: var(--font-geist-mono), monospace; text-transform: uppercase; letter-spacing: .1em; font-size: 10px; color: #5f7c85; }
.alias { font-size: 13px; color: #5f7c85; }
.reviewed { background: var(--mint); color: #23675d; border-radius: 999px; padding: 8px 10px; white-space: nowrap; font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; }
.answer-block { background: var(--paper); border-radius: 17px; margin: 25px 0 18px; padding: 18px; }
.answer-block p:last-child { font-size: 16px; line-height: 1.55; margin: 8px 0 0; }
.can-cannot { display: grid; gap: 9px; padding: 3px 3px 19px; font-size: 13px; }
.can-cannot div { display: flex; align-items: center; gap: 9px; }
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.yes { background: var(--teal); }
.dot.no { background: var(--coral); }
.sample-link { border-top: 1px solid var(--line); padding-top: 18px; display: flex; justify-content: space-between; font-size: 13px; font-weight: 750; }

.proof-strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); display: grid; grid-template-columns: repeat(4, 1fr); padding: 18px clamp(22px, 6vw, 96px); font-size: 12px; font-weight: 650; text-align: center; }
.proof-strip span + span { border-left: 1px solid var(--line); }
.featured { padding: 86px clamp(22px, 6vw, 96px) 110px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 35px; }
.section-heading h2 { max-width: 650px; margin: 10px 0 0; font-size: clamp(34px, 5vw, 58px); line-height: 1.02; letter-spacing: -.055em; }
.section-heading > a { font-size: 14px; font-weight: 750; padding-bottom: 6px; border-bottom: 1px solid var(--ink); }
.test-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.test-tile { min-height: 230px; padding: 22px; display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto 1fr auto; position: relative; }
.test-tile + .test-tile { border-left: 1px solid var(--line); }
.tile-number, .tile-group, .tile-alias { font-family: var(--font-geist-mono), monospace; font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.tile-group { text-align: right; color: #51747e; }
.test-tile strong { grid-column: 1 / -1; align-self: end; font-size: 25px; letter-spacing: -.035em; }
.tile-alias { align-self: end; color: #51747e; }
.tile-arrow { justify-self: end; align-self: end; font-size: 22px; }
.test-tile:hover { background: rgba(255,255,255,.55); }

.home-method { padding: 92px clamp(22px, 6vw, 96px) 110px; background: var(--ink); color: #f9f6ef; }
.home-method .eyebrow { color: #8bd2c4; }
.home-method > h2 { max-width: 980px; margin: 14px 0 48px; font-size: clamp(36px, 5vw, 66px); line-height: 1.03; letter-spacing: -.055em; }
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.method-grid p { margin: 0; padding: 28px; color: #cfe0df; }
.method-grid p + p { border-left: 1px solid rgba(255,255,255,.2); }
.method-grid strong { color: white; display: block; margin-bottom: 7px; }
.text-link { display: inline-block; margin-top: 30px; color: white; border-bottom: 1px solid currentColor; padding-bottom: 4px; font-weight: 700; }

.content-shell, .prose-shell, .article-shell { width: min(1180px, calc(100% - 44px)); margin: 0 auto; }
.content-shell { padding: 88px 0 120px; }
.page-title, .prose-shell h1 { margin: 16px 0 24px; max-width: 950px; font-size: clamp(46px, 7vw, 82px); line-height: .98; letter-spacing: -.065em; }
.lede { max-width: 760px; color: var(--ink-2); font-size: 20px; }
.library-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 62px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.library-card { padding: 28px; min-height: 340px; display: flex; flex-direction: column; transition: background .2s ease; }
.library-card + .library-card { border-left: 1px solid var(--line); }
.library-card > span { font: 700 10px var(--font-geist-mono), monospace; text-transform: uppercase; letter-spacing: .1em; color: #47756e; }
.library-card h2 { font-size: 30px; letter-spacing: -.04em; margin: 40px 0 8px; }
.library-card p { color: var(--ink-2); font-size: 14px; }
.library-card small { margin: 14px 0; color: #8a5b4f; font: 700 10px var(--font-geist-mono), monospace; text-transform: uppercase; letter-spacing: .06em; }
.library-card strong { margin-top: auto; font-size: 13px; }
.library-card:hover { background: rgba(255,255,255,.55); }
.search-results { margin: 30px 0 -35px; color: #607c86; font-size: 14px; }
.empty-state { margin-top: 32px; font-size: 17px; color: var(--ink-2); }

.prose-shell { padding: 90px 0 130px; max-width: 860px; }
.prose-shell > p:not(.eyebrow):not(.lede):not(.updated), .prose-shell li { font-size: 17px; color: var(--ink-2); }
.prose-shell h2 { font-size: 32px; letter-spacing: -.035em; margin: 56px 0 12px; }
.prose-shell ol { padding-left: 24px; }
.prose-shell li { padding: 8px 0 8px 8px; }
.prose-shell a { text-decoration: underline; text-underline-offset: 3px; }
.updated { margin-top: 60px; padding-top: 20px; border-top: 1px solid var(--line); font: 700 11px var(--font-geist-mono), monospace; text-transform: uppercase; letter-spacing: .08em; }

.article-shell { padding: 30px 0 120px; }
.breadcrumbs { display: flex; gap: 9px; align-items: center; padding: 20px 0 38px; font-size: 12px; color: #5d777f; }
.breadcrumbs a:hover { text-decoration: underline; }
.article-hero { display: grid; grid-template-columns: 1.25fr .55fr; gap: 72px; align-items: end; padding: 38px 0 64px; border-bottom: 1px solid var(--line); }
.article-hero h1 { margin: 13px 0 22px; font-size: clamp(48px, 7vw, 86px); line-height: .96; letter-spacing: -.065em; }
.article-hero h1 em { display: block; margin-top: 12px; font-size: .35em; font-family: var(--font-geist-mono), monospace; font-style: normal; letter-spacing: -.02em; color: #4d7875; }
.article-dek { max-width: 790px; font-size: 20px; color: var(--ink-2); }
.fact-card { background: white; border: 1px solid var(--line); border-radius: 20px; padding: 22px; box-shadow: 0 20px 60px rgba(18,52,66,.08); }
.fact-card dl { margin: 12px 0 0; }
.fact-card dl div { padding: 12px 0; display: grid; grid-template-columns: 1fr 1.2fr; border-top: 1px solid var(--line); font-size: 12px; }
.fact-card dt { color: #607980; }
.fact-card dd { margin: 0; font-weight: 700; text-align: right; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 82px; padding-top: 72px; }
.article-layout article section { padding: 18px 0 76px; border-bottom: 1px solid var(--line); }
.article-layout article h2 { font-size: clamp(34px, 4vw, 48px); line-height: 1.05; letter-spacing: -.045em; margin: 10px 0 22px; }
.article-layout article h3 { font-size: 20px; margin-top: 30px; }
.article-layout article > section > p:not(.section-kicker), .article-layout article li { font-size: 17px; color: var(--ink-2); }
.section-kicker { margin: 0; font: 700 11px var(--font-geist-mono), monospace; color: #43857b; letter-spacing: .1em; }
.meaning-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.meaning-grid > div { border-radius: 18px; padding: 22px; }
.meaning-yes { background: var(--mint); }
.meaning-no { background: #f6ded6; }
.meaning-grid h3 { margin: 0 0 15px; }
.meaning-grid ul, .context-list { padding-left: 20px; }
.meaning-grid li { color: var(--ink); padding: 4px 0; }
.range-warning { background: #fffdf8; border-left: 5px solid var(--coral); padding: 24px 26px; }
.range-warning strong { font-size: 18px; }
.range-warning p { margin-bottom: 0; }
.context-list li { padding: 6px 0; }
.qa-list details { border-top: 1px solid var(--line); }
.qa-list details:last-child { border-bottom: 1px solid var(--line); }
.qa-list summary { cursor: pointer; list-style: none; padding: 20px 30px 20px 0; font-weight: 750; position: relative; }
.qa-list summary::after { content: "+"; position: absolute; right: 4px; }
.qa-list details[open] summary::after { content: "–"; }
.qa-list details p { margin-top: 0; padding-right: 28px; }
.source-list { padding-left: 24px; }
.source-list li { padding: 0 0 26px 10px; }
.source-list a { color: #246f65; font-weight: 750; text-decoration: underline; text-underline-offset: 4px; }
.source-list span { display: block; margin-top: 5px; font: 650 10px var(--font-geist-mono), monospace; text-transform: uppercase; letter-spacing: .06em; color: #647e86; }
.source-list p { margin: 6px 0 0; font-size: 14px; }
.claim-citations { margin-left: 3px; font-size: .68em; line-height: 1; white-space: nowrap; }
.claim-citations a { color: #246f65; text-decoration: underline; text-underline-offset: 2px; }
.revision-list { padding-left: 22px; }
.revision-list li { padding: 0 0 18px 8px; }
.revision-list strong { font: 700 11px var(--font-geist-mono), monospace; }
.revision-list p { margin: 5px 0 0; font-size: 14px; }
.article-aside { align-self: start; position: sticky; top: 28px; }
.toc, .review-box { padding: 20px; border: 1px solid var(--line); border-radius: 16px; }
.toc { display: grid; gap: 10px; }
.toc a { font-size: 12px; color: #496771; }
.toc a:hover { color: var(--teal); }
.review-box { margin-top: 14px; background: #fffdf8; }
.review-box strong { display: block; margin: 10px 0 6px; font-size: 14px; }
.review-box p, .review-box a { font-size: 11px; color: #607980; }
.review-box a { text-decoration: underline; }
.review-box .review-hold { color: #8a4e41; font-weight: 650; }
.vv-panel { margin-top: 80px; background: var(--ink); color: white; padding: 42px; border-radius: 24px; display: grid; grid-template-columns: 1fr auto; gap: 50px; align-items: center; }
.vv-panel h2 { font-size: 36px; letter-spacing: -.045em; margin: 8px 0; }
.vv-panel p { max-width: 740px; color: #cadddf; margin-bottom: 0; }
.vv-panel .eyebrow { color: #8bd2c4; }
.vv-button { border: 1px solid rgba(255,255,255,.6); border-radius: 999px; padding: 15px 20px; font-size: 13px; font-weight: 750; white-space: nowrap; }

.site-footer { padding: 54px clamp(22px, 6vw, 96px) 28px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; gap: 34px; }
.footer-brand { display: inline-flex; }
.site-footer > div:first-child p { max-width: 570px; color: #58727b; font-size: 13px; }
.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; font-size: 12px; }
.footer-links a:hover { text-decoration: underline; }
.copyright { grid-column: 1 / -1; margin: 12px 0 0; padding-top: 20px; border-top: 1px solid var(--line); font-size: 10px; color: #71868d; text-transform: uppercase; letter-spacing: .08em; }

@media (max-width: 900px) {
  nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 55px; }
  .result-card { transform: none; max-width: 620px; }
  .proof-strip { grid-template-columns: 1fr 1fr; gap: 14px 0; }
  .proof-strip span:nth-child(3) { border-left: 0; }
  .test-grid { grid-template-columns: 1fr; }
  .test-tile + .test-tile { border-left: 0; border-top: 1px solid var(--line); }
  .method-grid, .library-grid { grid-template-columns: 1fr; }
  .method-grid p + p, .library-card + .library-card { border-left: 0; border-top: 1px solid var(--line); }
  .article-hero { grid-template-columns: 1fr; gap: 30px; }
  .fact-card { max-width: 560px; }
  .article-layout { grid-template-columns: 1fr; gap: 24px; }
  .article-aside { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; grid-row: 1; }
  .review-box { margin: 0; }
  .vv-panel { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 560px) {
  .site-header { min-height: 72px; }
  .brand { font-size: 16px; }
  .vv-link { padding: 9px 12px; font-size: 0; }
  .vv-link span { font-size: 15px; }
  .search-shell { grid-template-columns: 28px 1fr; }
  .search-shell button { grid-column: 1 / -1; }
  .proof-strip { grid-template-columns: 1fr; text-align: left; }
  .proof-strip span + span { border-left: 0; border-top: 1px solid var(--line); padding-top: 13px; }
  .section-heading { display: block; }
  .section-heading > a { display: inline-block; margin-top: 24px; }
  .content-shell, .prose-shell, .article-shell { width: min(100% - 32px, 1180px); }
  .meaning-grid { grid-template-columns: 1fr; }
  .article-aside { grid-template-columns: 1fr; }
  .vv-panel { padding: 28px 22px; }
  .vv-button { white-space: normal; text-align: center; }
  .site-footer { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr; }
}