:root {
  --ink: #e8e2d7;
  --muted: #aaa69f;
  --paper: #121311;
  --panel: #1a1b18;
  --line: #3b3c35;
  --accent: #d96543;
  --accent-soft: #f0b44a;
  --green: #82987e;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 88% 5%, rgba(217, 101, 67, .08), transparent 24rem),
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    var(--paper);
  background-size: auto, 100% 40px, auto;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  line-height: 1.58;
}

a { color: inherit; }
.site-header, main, footer { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.site-header {
  min-height: 88px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 42px;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 750; letter-spacing: .02em; }
.brand-mark { width: 24px; height: 24px; border: 2px solid var(--accent); border-radius: 50%; position: relative; transform: rotate(-18deg); }
.brand-mark::after { content: ""; position: absolute; width: 31px; height: 1px; background: var(--accent-soft); left: -6px; top: 10px; }
nav { display: flex; gap: 28px; }
nav a, .language { color: var(--muted); text-decoration: none; font-size: .92rem; }
nav a:hover, .language:hover { color: var(--ink); }
nav a.active { color: var(--ink); border-bottom: 1px solid var(--accent); }
.language { border: 1px solid var(--line); padding: 5px 9px; }

.hero { min-height: 680px; display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(280px, .7fr); gap: 80px; align-items: center; padding: 86px 0 92px; }
.eyebrow, .small-label, .note-label { margin: 0 0 18px; color: var(--accent-soft); text-transform: uppercase; letter-spacing: .14em; font-size: .72rem; font-weight: 750; }
h1, h2, h3 { font-family: Georgia, "Times New Roman", serif; font-weight: 500; line-height: 1.08; margin-top: 0; }
h1 { font-size: clamp(3rem, 6.4vw, 5.65rem); letter-spacing: -.045em; margin-bottom: 36px; }
h1 em { color: var(--accent); font-weight: inherit; }
h2 { font-size: clamp(2.2rem, 4.2vw, 3.8rem); letter-spacing: -.035em; }
h3 { font-size: 1.7rem; }
.lead { font-size: 1.18rem; max-width: 740px; color: #ccc6bb; }
.question { font-size: 1.2rem; max-width: 760px; padding-left: 22px; border-left: 2px solid var(--accent); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.button { display: inline-block; text-decoration: none; padding: 13px 19px; border: 1px solid var(--line); font-weight: 700; font-size: .9rem; }
.button.primary { background: var(--accent); border-color: var(--accent); color: #160f0c; }
.button.quiet:hover { border-color: var(--muted); }
.field-note { position: relative; background: #d7caa8; color: #28271f; padding: 34px 30px 26px; transform: rotate(1.2deg); box-shadow: 10px 16px 40px rgba(0,0,0,.28); font-family: Georgia, serif; font-size: 1.04rem; }
.field-note::after { content: ""; position: absolute; inset: 8px; border: 1px solid rgba(40,39,31,.18); pointer-events: none; }
.field-note .note-label { color: #8c402d; }
.signature { text-align: right; font-size: .88rem; font-style: italic; }
.pin { position: absolute; width: 15px; height: 15px; border-radius: 50%; background: #a24f38; top: 14px; left: 50%; box-shadow: 2px 3px 5px #52483c; }

section { border-top: 1px solid var(--line); padding: 98px 0; position: relative; }
.section-number { position: absolute; right: 0; top: 23px; color: #65665d; font: 1rem Georgia, serif; }
.section-heading { max-width: 840px; margin-bottom: 55px; }
.turn-grid { display: grid; grid-template-columns: 1fr 56px 1fr; gap: 26px; align-items: center; }
.then, .now { min-height: 200px; padding: 30px; border: 1px solid var(--line); background: rgba(255,255,255,.02); font-size: 1.22rem; }
.now { border-color: #71513c; background: rgba(217,101,67,.06); }
.arrow { text-align: center; color: var(--accent); font-size: 2rem; }
.plainspoken { max-width: 780px; margin: 45px 0 0 auto; color: #c9c4b9; font-size: 1.08rem; }

.split-heading { max-width: none; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: end; }
.split-heading > p { color: var(--muted); margin-bottom: 16px; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.model-card { min-height: 340px; padding: 28px; border: 1px solid var(--line); background: var(--panel); display: flex; flex-direction: column; }
.model-card.featured { background: linear-gradient(145deg, rgba(217,101,67,.14), var(--panel) 58%); }
.card-topline { display: flex; justify-content: space-between; color: var(--accent-soft); font-size: .72rem; text-transform: uppercase; letter-spacing: .09em; margin-bottom: 55px; }
.status { color: var(--green); }
.model-card p { color: var(--muted); }
.model-card a { margin-top: auto; color: var(--accent-soft); text-decoration: none; font-weight: 700; font-size: .9rem; }
.text-link { display: inline-block; margin-top: 28px; text-decoration: none; border-bottom: 1px solid var(--accent); }

.method { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; }
.method-intro { position: relative; }
.method-intro p:not(.eyebrow) { color: #c4beb3; }
code { color: #f0c083; background: #272820; padding: 2px 5px; }
.method-steps { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.method-steps li { display: grid; grid-template-columns: 60px 1fr; gap: 18px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.method-steps li > span { color: var(--accent); font-family: Georgia, serif; }
.method-steps strong { font-family: Georgia, serif; font-size: 1.25rem; font-weight: 500; }
.method-steps p { margin: 5px 0 0; color: var(--muted); }

.human { display: grid; grid-template-columns: 8px 1.4fr 1fr; gap: 45px; align-items: center; background: rgba(255,255,255,.018); padding-inline: 46px; }
.human-rule { width: 4px; height: 100%; background: linear-gradient(var(--accent), var(--accent-soft)); }
blockquote { margin: 0; font: 1.7rem/1.4 Georgia, serif; }
.human > p { color: var(--muted); }

.library-links { border-top: 1px solid var(--line); }
.library-links a { display: grid; grid-template-columns: 55px 1fr 1.4fr 30px; gap: 25px; align-items: center; padding: 25px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.library-links a:hover strong { color: var(--accent-soft); }
.library-links span { color: var(--accent); font-family: Georgia, serif; }
.library-links strong { font: 1.35rem Georgia, serif; }
.library-links small { color: var(--muted); font-size: .9rem; }
.library-links b { text-align: right; color: var(--accent-soft); }

footer { padding: 55px 0 72px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 50px; color: var(--muted); font-size: .88rem; }
.footer-brand { color: var(--ink); }
.footer-contact { display: flex; flex-direction: column; gap: 5px; }
.footer-contact a { color: var(--ink); }
.footer-note { font-family: Georgia, serif; font-style: italic; }

.breadcrumbs { color: var(--muted); font-size: .82rem; margin: 0 0 70px; }
.breadcrumbs a { text-decoration: none; border-bottom: 1px solid var(--line); }
.subpage-hero { padding-top: 52px; }
.subpage-hero h1 { max-width: 1000px; }
.subpage-lead { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; max-width: 930px; margin-left: auto; font-size: 1.08rem; color: #c7c1b6; }
.status-key { padding: 25px 0; display: flex; flex-wrap: wrap; gap: 25px; color: var(--muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .06em; }
.status-key span { display: inline-flex; align-items: center; gap: 8px; }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #777; }
.dot.concept { background: #84735f; }.dot.sandbox { background: var(--accent-soft); }.dot.working { background: var(--green); }.dot.reproducible { background: #6b96a7; }.dot.archive { background: #65665d; }
.model-catalog { padding-top: 0; }
.model-row { display: grid; grid-template-columns: 80px minmax(260px, .9fr) minmax(320px, 1.1fr); gap: 42px; padding: 55px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 30px; }
.model-row:first-child { border-top: 1px solid var(--line); }
.model-index { color: var(--accent); font: 1rem Georgia, serif; }
.model-summary h2 { font-size: clamp(2rem, 3.2vw, 3rem); }
.model-summary > p { color: var(--muted); }
.working-text { color: var(--green); }.sandbox-text { color: var(--accent-soft); }.archive-text { color: #88887f; }
.model-facts dl { margin: 0; }
.model-facts dl > div { border-top: 1px solid var(--line); padding: 12px 0; }
.model-facts dt { color: var(--muted); font-size: .73rem; text-transform: uppercase; letter-spacing: .07em; }
.model-facts dd { margin: 5px 0 0; }
.model-facts a { display: inline-block; margin-top: 24px; color: var(--accent-soft); text-decoration: none; font-weight: 700; font-size: .9rem; }
.model-links { display: flex; flex-direction: column; align-items: flex-start; }
.model-links a + a { margin-top: 8px; color: var(--muted); font-weight: 400; }
.external-result { display: grid; grid-template-columns: 1fr 1fr; gap: 55px; padding: 32px; margin: 26px 0; border-left: 3px solid var(--accent-soft); background: rgba(240,180,74,.055); }
.external-result h3 { margin-bottom: 0; }
.external-result > div:last-child p { color: var(--muted); }
.external-result a { color: var(--accent-soft); text-decoration: none; }
.model-row.subdued { opacity: .78; }
.catalog-note { display: grid; grid-template-columns: .6fr 1.4fr; gap: 70px; }
.catalog-note blockquote { font-size: 1.55rem; }

.cqt-hero { padding-bottom: 80px; }
.cqt-flow { display: grid; grid-template-columns: 1fr 32px 1.25fr 32px 1fr 32px .8fr; align-items: stretch; gap: 12px; padding: 35px 0; }
.flow-step, .flow-result { border: 1px solid var(--line); padding: 24px; display: flex; flex-direction: column; gap: 8px; background: var(--panel); }
.flow-step > span { color: var(--accent); font: 1rem Georgia, serif; }
.flow-step small { color: var(--muted); }
.flow-arrow { display: grid; place-items: center; color: var(--accent); }
.flow-result { justify-content: center; align-items: center; color: var(--accent-soft); }
.flow-result span { color: var(--muted); font-size: .75rem; }
.principle-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.principle-grid article { padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); min-height: 280px; }
.principle-grid article > span { color: var(--accent); }
.principle-grid h3 { margin-top: 45px; }
.principle-grid p { color: var(--muted); }
.invalid-section { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; background: rgba(217,101,67,.06); padding-inline: 42px; }
.invalid-section > div:last-child { color: #c8c1b6; font-size: 1.08rem; }
.use-list { border-top: 1px solid var(--line); }
.use-list > div { display: grid; grid-template-columns: 1fr 1.4fr; gap: 30px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.use-list span { color: var(--muted); }
.working-disclaimer { max-width: 780px; margin: 45px 0 0 auto; padding: 22px; border-left: 2px solid var(--accent-soft); background: rgba(255,255,255,.02); }
.compact-footer { padding: 38px 0 55px; display: flex; justify-content: space-between; }
.compact-footer a { color: var(--muted); text-decoration: none; }
.compact-footer a:hover { color: var(--ink); }

.publications-hero { padding-bottom: 75px; }
.current-output { display: grid; grid-template-columns: 1.15fr .85fr; gap: 65px; background: rgba(130,152,126,.07); padding-inline: 38px; }
.current-output h2 { font-size: clamp(2rem, 3.3vw, 3rem); }
.current-output > div:first-child > p:last-child, .current-output > div:last-child p { color: var(--muted); }
.current-output > div:last-child { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.current-output a { color: var(--accent-soft); text-decoration: none; margin-top: 10px; }
.publication-statuses { display: grid; grid-template-columns: repeat(3, 1fr); padding: 0; border-left: 1px solid var(--line); }
.publication-statuses > div { padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.publication-statuses span { color: var(--accent); font-family: Georgia, serif; display: block; margin-bottom: 35px; }
.publication-statuses strong { font: 1.25rem Georgia, serif; }
.publication-statuses p { color: var(--muted); }
.publication-section .section-heading > p:last-child { color: var(--muted); }
.publication-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.publication-list li { display: grid; grid-template-columns: 55px 1fr auto; gap: 28px; align-items: start; padding: 24px 0; border-bottom: 1px solid var(--line); }
.publication-list li > span { color: var(--accent); font-family: Georgia, serif; }
.publication-list h3 { font-size: 1.25rem; margin-bottom: 8px; }
.publication-list p { color: var(--muted); margin: 0; font-size: .85rem; }
.publication-list a { color: var(--accent-soft); text-decoration: none; font-size: .82rem; white-space: nowrap; }
.topic-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 0 50px; border-top: 1px solid var(--line); }
.topic-groups article { padding: 30px 0; border-bottom: 1px solid var(--line); }
.topic-groups h3 { margin-bottom: 18px; }
.topic-groups ul, .archive-list { list-style: none; padding: 0; margin: 0; }
.topic-groups li { padding: 9px 0; border-top: 1px dotted var(--line); }
.topic-groups a, .archive-list a { color: #c9c4b9; text-decoration: none; }
.topic-groups a:hover, .archive-list a:hover { color: var(--accent-soft); }
.archive-publications { background: rgba(255,255,255,.015); padding-inline: 34px; }
.archive-list { border-top: 1px solid var(--line); }
.archive-list li { padding: 17px 0; border-bottom: 1px solid var(--line); }

.library-hero { padding-bottom: 75px; }
.library-doors { padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); border-left: 1px solid var(--line); }
.library-doors > a { min-height: 290px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; display: flex; flex-direction: column; }
.library-doors span { color: var(--accent); font-family: Georgia, serif; }
.library-doors h2 { margin-top: 45px; font-size: 2.15rem; }
.library-doors p { color: var(--muted); }
.library-doors b { margin-top: auto; color: var(--accent-soft); font-size: .8rem; }
.project-timeline ol { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.project-timeline li { display: grid; grid-template-columns: .45fr 1.55fr; gap: 40px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.project-timeline li > span { color: var(--accent); text-transform: uppercase; letter-spacing: .08em; font-size: .73rem; }
.project-timeline h3 { margin-bottom: 8px; }
.project-timeline p { color: var(--muted); margin: 0; }
.chapter-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.chapter-grid a { min-height: 175px; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; display: flex; flex-direction: column; }
.chapter-grid span { color: var(--accent); font-family: Georgia, serif; }
.chapter-grid strong { margin-top: 25px; font: 1.25rem Georgia, serif; }
.chapter-grid small { color: var(--muted); margin-top: 6px; }
.chapter-grid a:hover strong { color: var(--accent-soft); }
.migration-note { max-width: 760px; margin: 35px 0 0 auto; color: var(--muted); border-left: 2px solid var(--accent-soft); padding-left: 20px; }
.reading-list { border-top: 1px solid var(--line); }
.reading-list a { display: grid; grid-template-columns: 130px 1fr 1.2fr; gap: 30px; padding: 19px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.reading-list span { color: var(--accent); text-transform: uppercase; letter-spacing: .06em; font-size: .72rem; }
.reading-list strong { font-family: Georgia, serif; }
.reading-list small { color: var(--muted); }
.notes-library { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.notes-intro { position: relative; }
.notes-intro > p:not(.eyebrow) { color: var(--muted); }
.notes-stack { border-top: 1px solid var(--line); }
.notes-stack article { padding: 25px 0; border-bottom: 1px solid var(--line); }
.notes-stack span { color: var(--accent-soft); text-transform: uppercase; letter-spacing: .07em; font-size: .7rem; }
.notes-stack h3 { margin: 12px 0 8px; }
.notes-stack p { color: var(--muted); margin: 0; }

.project-hero { padding-bottom: 75px; }
.author-letter { display: grid; grid-template-columns: .55fr 1.25fr .7fr; gap: 48px; align-items: start; background: rgba(217,101,67,.055); padding-inline: 40px; }
.letter-label { display: flex; flex-direction: column; gap: 7px; }
.letter-label span { color: var(--accent); text-transform: uppercase; letter-spacing: .08em; font-size: .72rem; }
.letter-label strong { font-family: Georgia, serif; font-weight: 500; }
.author-letter blockquote { font-size: 1.55rem; }
.letter-signature { color: var(--muted); font-family: Georgia, serif; font-style: italic; }
.claim-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.claim-grid article { min-height: 235px; padding: 27px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.claim-grid article > span { color: var(--green); text-transform: uppercase; letter-spacing: .07em; font-size: .7rem; }
.claim-grid article.not-claim > span { color: var(--accent); }
.claim-grid h3 { margin: 40px 0 10px; }
.claim-grid p { color: var(--muted); }
.working-principles ol { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.working-principles li { display: grid; grid-template-columns: 70px 1fr; gap: 25px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.working-principles li > span { color: var(--accent); font-family: Georgia, serif; }
.working-principles h3 { margin-bottom: 7px; }
.working-principles p { color: var(--muted); margin: 0; }
.person-section { display: grid; grid-template-columns: 1.25fr .75fr; gap: 70px; align-items: end; }
.person-card > p:not(.eyebrow) { color: var(--muted); max-width: 680px; }
.person-card dl { margin-top: 35px; border-top: 1px solid var(--line); }
.person-card dl > div { display: grid; grid-template-columns: 120px 1fr; gap: 25px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.person-card dt { color: var(--muted); text-transform: uppercase; letter-spacing: .06em; font-size: .7rem; }
.person-card dd { margin: 0; }
.person-card a { color: var(--accent-soft); }
.person-note { background: var(--panel); border: 1px solid var(--line); padding: 28px; transform: rotate(-.6deg); }
.person-note p { margin: 0; font-family: Georgia, serif; }
.collaboration-section .section-heading > p:last-child { color: var(--muted); }
.collaboration-list { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.collaboration-list > div { min-height: 190px; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.collaboration-list span { color: var(--accent); font-family: Georgia, serif; display: block; margin-bottom: 35px; }
.collaboration-list strong { font-family: Georgia, serif; font-size: 1.2rem; }
.collaboration-list p { color: var(--muted); }
.contact-call { display: flex; justify-content: space-between; gap: 30px; margin-top: 35px; padding: 25px 0; border-top: 1px solid var(--accent); border-bottom: 1px solid var(--accent); text-decoration: none; }
.contact-call span { color: var(--muted); }
.contact-call strong { color: var(--accent-soft); }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  nav { display: none; }
  .hero, .method { grid-template-columns: 1fr; gap: 50px; }
  .hero { padding-top: 60px; }
  .field-note { max-width: 500px; }
  .card-grid { grid-template-columns: 1fr; }
  .model-card { min-height: 280px; }
  .split-heading, .human { grid-template-columns: 1fr; gap: 28px; }
  .subpage-lead, .invalid-section { grid-template-columns: 1fr; gap: 25px; }
  .model-row { grid-template-columns: 55px 1fr; }
  .model-facts { grid-column: 2; }
  .cqt-flow { grid-template-columns: 1fr; }
  .flow-arrow { transform: rotate(90deg); min-height: 24px; }
  .principle-grid { grid-template-columns: 1fr 1fr; }
  .catalog-note { grid-template-columns: 1fr; gap: 20px; }
  .publication-statuses { grid-template-columns: 1fr; }
  .topic-groups { grid-template-columns: 1fr; }
  .library-doors { grid-template-columns: 1fr; }
  .chapter-grid { grid-template-columns: 1fr 1fr; }
  .notes-library { grid-template-columns: 1fr; gap: 35px; }
  .author-letter { grid-template-columns: 1fr; gap: 25px; }
  .person-section { grid-template-columns: 1fr; gap: 35px; }
  .external-result, .current-output { grid-template-columns: 1fr; gap: 25px; }
  .human-rule { width: 100%; height: 3px; }
  footer { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .site-header, main, footer { width: min(calc(100% - 28px), var(--max)); }
  .site-header { min-height: 70px; }
  h1 { font-size: 2.75rem; }
  section { padding: 70px 0; }
  .turn-grid { grid-template-columns: 1fr; }
  .arrow { transform: rotate(90deg); }
  .hero-actions { flex-direction: column; align-items: stretch; text-align: center; }
  .human { padding-inline: 20px; }
  .library-links a { grid-template-columns: 35px 1fr 25px; }
  .library-links small { grid-column: 2 / 4; }
  .model-row { grid-template-columns: 1fr; gap: 18px; }
  .model-facts { grid-column: 1; }
  .principle-grid { grid-template-columns: 1fr; }
  .invalid-section { padding-inline: 20px; }
  .use-list > div { grid-template-columns: 1fr; gap: 5px; }
  .compact-footer { flex-direction: column; gap: 16px; }
  .publication-list li { grid-template-columns: 35px 1fr; }
  .publication-list li > a { grid-column: 2; white-space: normal; }
  .archive-publications { padding-inline: 18px; }
  .project-timeline li { grid-template-columns: 1fr; gap: 8px; }
  .chapter-grid { grid-template-columns: 1fr; }
  .reading-list a { grid-template-columns: 1fr; gap: 6px; }
  .claim-grid, .collaboration-list { grid-template-columns: 1fr; }
  .author-letter { padding-inline: 20px; }
  .contact-call { flex-direction: column; gap: 6px; }
  .external-result, .current-output { padding-inline: 20px; }
}