:root {
  --paper: #fbfbf8;
  --paper-alt: #f3f3ee;
  --ink: #181c19;
  --muted: #606660;
  --faint: #929791;
  --line: #d6d8d1;
  --accent: #205d45;
  --serif: "Source Serif 4", Georgia, serif;
}
.editorial { color: var(--ink); background: var(--paper); font-family: var(--serif); }
.reading-progress { position: fixed; inset: 0 0 auto; z-index: 30; height: 2px; }
.reading-progress span { display: block; width: 0; height: 100%; background: var(--accent); transition: width .08s linear; }
.editorial .editorial-nav { height: 60px; padding: 0 clamp(20px, 4vw, 60px); color: var(--ink); background: rgba(251, 251, 248, .95); border-color: var(--line); backdrop-filter: blur(14px); }
.editorial .brand { color: var(--ink); font-family: var(--sans); }
.editorial .brand-mark { width: 28px; height: 28px; color: var(--paper); background: var(--ink); }
.editorial .editorial-nav nav a { color: var(--muted); font: 500 11px var(--sans); }
.editorial .editorial-nav nav a:hover { color: var(--accent); }
.issue-date { color: var(--faint); font: 400 9px var(--mono); letter-spacing: .08em; }
.publication-header { max-width: 1040px; margin: 0 auto; padding: 62px 34px 52px; border-bottom: 1px solid var(--line); }
.journal-masthead { display: flex; justify-content: space-between; padding: 9px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--ink); color: var(--muted); font: 500 9px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.publication-label { margin: 45px 0 12px; color: var(--accent); font: 600 10px var(--sans); letter-spacing: .13em; text-transform: uppercase; }
.publication-header h1 { max-width: 860px; margin: 0; color: var(--ink); font: 500 clamp(43px, 6.2vw, 72px)/1.02 var(--serif); letter-spacing: -.045em; text-wrap: balance; }
.abstract { display: grid; grid-template-columns: 100px minmax(0, 680px); gap: 25px; margin: 34px 0 36px; padding: 20px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.abstract > span { padding-top: 4px; color: var(--ink); font: 600 9px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.publication-deck { margin: 0; color: #3e443f; font: 400 19px/1.58 var(--serif); text-wrap: pretty; }
.byline-row { display: flex; flex-wrap: wrap; gap: 16px 30px; }
.byline-row div { display: flex; align-items: baseline; gap: 8px; }
.byline-row span { color: var(--faint); font: 500 8px var(--mono); letter-spacing: .07em; }
.byline-row b { color: var(--ink); font: 600 10px var(--sans); }
.article-frame { display: grid; grid-template-columns: minmax(0, 800px) 180px; justify-content: center; gap: 54px; max-width: 1120px; margin: auto; padding: 72px 34px 100px; }
.article-rail { position: relative; grid-column: 2; grid-row: 1; font-family: var(--sans); }
.rail-inner { position: sticky; top: 92px; }
.rail-label { margin: 0 0 14px; padding-bottom: 9px; border-bottom: 1px solid var(--line); color: var(--faint); font: 500 8px var(--mono); letter-spacing: .11em; text-transform: uppercase; }
.article-toc { max-height: 55vh; margin: 0; padding: 0 0 0 17px; overflow-y: auto; scrollbar-width: thin; }
.article-toc li { margin: 0 0 9px; padding-left: 3px; color: var(--faint); font: 500 10px/1.35 var(--sans); }
.article-toc a { color: inherit; text-decoration: none; }
.article-toc li.active, .article-toc a:hover { color: var(--accent); }
.session-note { margin-top: 26px; padding-top: 14px; border-top: 1px solid var(--line); }
.session-note > span { color: var(--muted); font: 600 8px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.session-note p { display: flex; justify-content: space-between; margin: 6px 0; color: var(--faint); font: 500 9px var(--sans); }
.session-note b { color: var(--muted); font: 500 9px var(--mono); }
.technical-article { grid-column: 1; grid-row: 1; width: 100%; min-width: 0; color: var(--ink); }
.technical-article > h2:first-child { margin-top: 0; font-size: clamp(31px, 4vw, 42px); }
.technical-article h2 { margin: 0 0 28px; font: 500 clamp(30px, 3.6vw, 40px)/1.12 var(--serif); letter-spacing: -.025em; }
.technical-article h3 { scroll-margin-top: 88px; margin: 66px 0 22px; font: 600 clamp(23px, 2.5vw, 29px)/1.2 var(--serif); letter-spacing: -.014em; text-wrap: balance; }
.technical-article p, .technical-article li { color: #343a35; font: 400 19.5px/1.76 var(--serif); text-wrap: pretty; }
.technical-article p { margin: 0 0 24px; }
.technical-article li { margin-bottom: 7px; }
.technical-article ul, .technical-article ol { margin: 4px 0 28px; padding-left: 26px; }
.technical-article strong { color: var(--ink); font-weight: 600; }
.technical-article a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.technical-article .research-note { margin: 0 0 44px; padding: 20px 22px; border: 1px solid var(--line); border-left: 3px solid var(--accent); background: var(--paper-alt); color: #344139; font: 400 16px/1.68 var(--serif); }
.technical-article .citation { margin-top: 46px; padding: 22px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font: 400 14px/1.68 var(--serif); }
.technical-article .math-block { margin: 30px 0; padding: 22px 14px; overflow-x: auto; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: center; }
.technical-article .article-caption { margin: 13px 0 26px; color: var(--faint); font: 400 10px/1.55 var(--mono); }
.technical-article pre { margin: 28px 0; padding: 20px; overflow: auto; border: 1px solid var(--line); border-radius: 0; background: var(--paper-alt); tab-size: 4; }
.technical-article code { color: #26342c; font: 400 12px/1.68 var(--mono); }
.article-table { width: 100%; margin: 34px 0; border-collapse: collapse; background: transparent; }
.article-table th, .article-table td { padding: 10px; border-bottom: 1px solid var(--line); color: var(--muted); text-align: left; vertical-align: top; font: 500 10px/1.4 var(--sans); }
.article-table th { color: var(--ink); border-top: 2px solid var(--ink); font-size: 9px; text-transform: uppercase; }
.video-frame { width: 100%; aspect-ratio: 16/9; margin: 38px 0 14px; border: 0; filter: grayscale(.15); }
.article-backmatter { max-width: 900px; margin: 0 auto; padding: 82px 34px; border-top: 1px solid var(--line); }
.backmatter-heading { display: grid; grid-template-columns: 125px 1fr; column-gap: 28px; margin-bottom: 40px; }
.backmatter-heading p { grid-row: 1 / span 2; margin: 7px 0 0; color: var(--muted); font: 500 8px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.backmatter-heading h2 { margin: 0; font: 500 clamp(31px, 4.5vw, 48px)/1.08 var(--serif); letter-spacing: -.03em; }
.backmatter-heading span { max-width: 570px; margin-top: 11px; color: var(--muted); font: 400 14px/1.55 var(--serif); }
.simulator-boundary { display: grid; grid-template-columns: 145px 1fr; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.simulator-boundary b { color: var(--ink); font: 600 10px var(--sans); }
.simulator-boundary p { margin: 0; color: var(--muted); font: 400 13px/1.5 var(--serif); }
.code-disclosure { margin-top: 22px; border-bottom: 1px solid var(--line); }
.code-disclosure summary { display: flex; justify-content: space-between; gap: 20px; padding: 16px 0; cursor: pointer; font: 600 12px var(--sans); }
.code-disclosure summary small { color: var(--faint); font: 400 9px var(--mono); }
.code-toolbar { display: flex; justify-content: flex-end; gap: 20px; padding: 9px 13px; border: 1px solid var(--line); border-bottom: 0; background: var(--paper-alt); }
.code-toolbar a, .text-button { color: var(--accent); border: 0; background: transparent; font: 500 9px var(--mono); text-decoration: none; cursor: pointer; }
.source-code { max-height: 760px; margin: 0; padding: 25px; overflow: auto; color: #26342c; border: 1px solid var(--line); background: var(--paper-alt); tab-size: 4; }
.source-code code { font: 400 12px/1.7 var(--mono); }
.bibliography-section { padding-bottom: 95px; }
.source-ledger { margin: 0; padding: 0; list-style: none; counter-reset: source; }
.source-entry { counter-increment: source; display: grid; grid-template-columns: 42px 1fr 110px; gap: 16px; padding: 18px 0; border-top: 1px solid var(--line); background: transparent; }
.source-entry::before { content: counter(source, decimal-leading-zero); color: var(--faint); font: 500 9px var(--mono); }
.source-entry .source-type { color: var(--muted); font: 500 8px var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.source-entry h3 { margin: 3px 0; font: 500 17px/1.25 var(--serif); }
.source-entry p { margin: 0; color: var(--muted); font: 400 12px/1.45 var(--serif); }
.source-entry a { align-self: center; color: var(--accent); font: 500 8px var(--mono); text-align: right; text-decoration: none; }
.curriculum-index { padding: 90px max(28px, calc((100vw - 1040px) / 2)); border-top: 1px solid var(--line); background: var(--paper-alt); }
.index-heading { display: grid; grid-template-columns: 150px minmax(0, 650px); gap: 0 28px; margin-bottom: 42px; }
.index-heading > p { grid-row: 1 / span 2; margin: 7px 0; color: var(--muted); font: 500 8px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.index-heading h2 { margin: 0; font: 500 clamp(34px, 4.5vw, 52px)/1.07 var(--serif); letter-spacing: -.035em; }
.index-heading > span { max-width: 600px; margin-top: 14px; color: var(--muted); font: 400 14px/1.55 var(--serif); }
.index-summary { display: flex; gap: 10px; margin: 0 0 35px 178px; color: var(--muted); font: 400 11px var(--mono); }
.index-summary strong { color: var(--ink); font-weight: 500; }
.index-summary i { color: var(--faint); font-style: normal; }
.roadmap-toolbar, .roadmap-list { margin-left: 178px; }
.editorial .roadmap-toolbar input, .editorial .roadmap-toolbar select { color: var(--ink); background: var(--paper); border-color: var(--line); }
.editorial .roadmap-toolbar .search { background: var(--paper); border-color: var(--line); }
.roadmap-list { margin-top: 28px; border-top: 1px solid var(--line); }
.lesson-card { display: grid; grid-template-columns: 70px minmax(230px, 1.5fr) 1fr 105px; align-items: baseline; min-height: 0; padding: 14px 0; border: 0; border-bottom: 1px solid var(--line); background: transparent; }
.lesson-card::before { display: none; }
.lesson-number { color: var(--faint); font: 500 9px var(--mono); }
.lesson-card h3 { margin: 0; padding-right: 22px; color: var(--ink); font: 500 15px/1.3 var(--serif); }
.lesson-meta { color: var(--faint); font: 400 8px var(--mono); }
.lesson-domain { margin: 0; padding: 0; color: var(--muted); border: 0; font: 400 8px/1.3 var(--mono); text-align: right; }
.thread-list { display: none; }
.lesson-card.current { border-color: var(--accent); }
.lesson-card.current h3 { color: var(--accent); }
.foundations-index { max-width: 900px; margin: auto; padding: 90px 34px; }
.foundations-index header { display: grid; grid-template-columns: 150px 1fr; margin-bottom: 42px; }
.foundations-index header p { color: var(--muted); font: 500 8px var(--mono); text-transform: uppercase; }
.foundations-index h2 { margin: 0; font: 500 clamp(31px, 4.5vw, 47px)/1.08 var(--serif); letter-spacing: -.03em; }
.foundation-list { display: grid; grid-template-columns: repeat(2, 1fr); margin: 0 0 0 150px; padding: 0; list-style: none; counter-reset: foundation; border-top: 1px solid var(--line); }
.foundation-item { counter-increment: foundation; display: grid; grid-template-columns: 30px 1fr; padding: 15px 10px 15px 0; border-bottom: 1px solid var(--line); background: transparent; }
.foundation-item::before { content: counter(foundation, decimal-leading-zero); color: var(--faint); font: 400 8px var(--mono); }
.foundation-item h3 { margin: 0; font: 500 14px/1.35 var(--serif); }
.foundation-item span { display: none; }
.research-history { padding: 90px max(28px, calc((100vw - 900px) / 2)); border-top: 1px solid var(--line); background: var(--paper-alt); }
.research-history .index-heading { grid-template-columns: 150px 1fr; }
.research-ledger { margin-left: 178px; }
.research-record { padding: 24px 0; border: 0; border-top: 1px solid var(--line); background: transparent; }
.research-record header { display: flex; justify-content: space-between; gap: 20px; }
.research-record h3 { margin: 0; font: 500 20px/1.25 var(--serif); }
.research-record time { color: var(--muted); font: 400 9px var(--mono); }
.research-record > p { color: var(--muted); font: 400 14px/1.58 var(--serif); }
.research-sources { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; }
.research-source { padding: 11px 0; border: 0; border-top: 1px solid var(--line); }
.research-source b { display: block; font: 500 12px/1.35 var(--serif); }
.research-source span { color: var(--faint); font: 400 9px/1.4 var(--sans); }
.research-source a { color: var(--accent); font: 500 8px var(--mono); text-decoration: none; }
.correction { margin-top: 18px; padding: 13px 0 0 16px; color: var(--muted); border-left: 2px solid var(--muted); background: transparent; font: 400 11px/1.5 var(--serif); }
.editorial-footer { color: #cbd1cc; background: #1d221e; }
.editorial-footer p { color: #929c95; }
.editorial-footer a { color: #b8c2bb; }
.editorial .error-banner { color: #6f211d; border-color: #bf837b; background: #f5dfda; font-family: var(--sans); }
@media (max-width: 980px) {
  .article-frame { display: block; max-width: 820px; }
  .article-rail { display: none; }
  .index-summary, .roadmap-toolbar, .roadmap-list, .research-ledger { margin-left: 0; }
}
@media (max-width: 720px) {
  .editorial .editorial-nav nav { display: none; }
  .publication-header { padding: 45px 22px 40px; }
  .journal-masthead { gap: 20px; }
  .journal-masthead span:last-child { text-align: right; }
  .abstract { grid-template-columns: 1fr; gap: 8px; }
  .byline-row { gap: 10px 20px; }
  .article-frame { display: block; padding: 50px 22px 72px; }
  .article-rail { display: none; }
  .technical-article p, .technical-article li { font-size: 18px; line-height: 1.74; }
  .technical-article h3 { margin-top: 56px; }
  .article-table { display: block; overflow-x: auto; }
  .article-backmatter, .foundations-index { padding: 68px 22px; }
  .backmatter-heading, .index-heading, .foundations-index header, .research-history .index-heading { display: block; }
  .backmatter-heading p, .index-heading > p { margin-bottom: 10px; }
  .simulator-boundary { grid-template-columns: 1fr; gap: 7px; }
  .source-entry { grid-template-columns: 30px 1fr; }
  .source-entry a { grid-column: 2; text-align: left; }
  .curriculum-index, .research-history { padding: 68px 22px; }
  .index-summary { flex-wrap: wrap; }
  .roadmap-toolbar { flex-direction: column; }
  .lesson-card { grid-template-columns: 52px 1fr; gap: 4px 10px; }
  .lesson-meta, .lesson-domain { grid-column: 2; text-align: left; }
  .foundation-list { grid-template-columns: 1fr; margin-left: 0; }
  .research-sources { grid-template-columns: 1fr; }
  .editorial-footer { flex-direction: column; }
}
@media (max-width: 440px) {
  .publication-header h1 { font-size: 40px; }
  .publication-deck { font-size: 17px; }
  .source-code { padding: 16px; }
}