/* Long-form subpages: SEO landing pages, the full case study. Reuses design
   tokens from style.css (loaded first) -- this file is layout/typography
   only, no new colors. */

.subpage { padding-bottom: 40px; }

.article-hero { padding: 96px 0 56px; border-bottom: 1px solid var(--line); }
.article-hero .wrap { max-width: 760px; }
.article-hero .eyebrow { margin-bottom: 16px; }
.article-hero h1 {
  font-family: var(--serif); font-weight: 500; letter-spacing: -0.01em;
  font-size: clamp(32px, 5vw, 48px); line-height: 1.1; margin: 0 0 20px; max-width: 900px; font-optical-sizing: auto;
}
.article-hero .lede { font-size: 19px; color: var(--ink-soft); max-width: 660px; margin: 0; line-height: 1.58; letter-spacing: -0.008em; }
.article-back { font-family: var(--mono); font-size: 13px; color: var(--gray); margin-bottom: 28px; display: inline-block; }
.article-back:hover { color: var(--ink); }

.prose { padding: 64px 0; }
.prose .wrap { max-width: 700px; }
.prose h2 {
  font-family: var(--serif); font-weight: 500; font-size: 27px;
  margin: 56px 0 16px; letter-spacing: -0.005em;
}
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 16px; font-weight: 700; margin: 32px 0 12px; }
.prose p { color: var(--ink-soft); font-size: 16.5px; line-height: 1.75; max-width: 68ch; margin: 0 0 20px; }
.prose p.lead { font-family: var(--serif); font-size: 21px; color: var(--ink); line-height: 1.5; }
.prose ul, .prose ol { color: var(--ink-soft); font-size: 16px; line-height: 1.7; margin: 0 0 20px; padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose .mono-line { display: block; margin: 24px 0; }
.prose a:not(.btn) { color: var(--accent-blue); text-decoration: underline; text-underline-offset: 3px; }
.prose blockquote {
  margin: 32px 0; padding-left: 20px; border-left: 2px solid var(--accent-blue);
  font-family: var(--serif); font-size: 19px; line-height: 1.5; font-style: italic; color: var(--ink);
}

.subpage-cta {
  border-top: 1px solid var(--line); padding: 56px 0; text-align: center;
}
.subpage-cta .wrap { max-width: 600px; }
.subpage-cta p { color: var(--gray); margin: 16px 0 24px; }

.section-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* ---------- Editorial portfolio v2 surfaces ---------- */
.hero-compact { padding-top: 112px; padding-bottom: 88px; }
.hero-proof { border: 1px solid var(--line-strong); background: var(--glass); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); padding: 22px 24px 24px; box-shadow: var(--glass-sheen), 10px 10px 0 rgba(22,22,22,0.07); }
.proof-plate-meta { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-bottom: 16px; margin-bottom: 18px; border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: 10px; letter-spacing: .09em; text-transform: uppercase; color: var(--gray-dim); }
.proof-status { display: inline-flex; align-items: center; gap: 6px; color: var(--accent-green); white-space: nowrap; }
.proof-status i { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 3px var(--accent-green-dim); }
.hero-proof .diagram-caption { margin-bottom: 18px; }
.hero-proof-list { list-style: none; margin: 0; padding: 0; }
.hero-proof-list li { display: grid; grid-template-columns: 34px minmax(0, 1fr); grid-template-rows: auto auto; gap: 2px 12px; padding: 13px 0; border-top: 1px solid var(--line); }
.hero-proof-list li:first-child { border-top: none; padding-top: 0; }
.hero-proof-list li > span { grid-column: 1; grid-row: 1 / span 2; font-family: var(--mono); font-size: 11px; color: var(--accent-blue); padding-top: 2px; }
.hero-proof-list strong { display: block; grid-column: 2; grid-row: 1; font-size: 15px; line-height: 1.25; }
.hero-proof-list small { display: block; grid-column: 2; grid-row: 2; color: var(--gray); font-size: 12.5px; line-height: 1.45; }
.section-tight { padding-top: 72px; padding-bottom: 72px; }
.quick-intro { display: flex; align-items: baseline; gap: 28px; margin-bottom: 28px; }
.quick-intro .eyebrow { margin: 0; flex: none; }
.quick-intro-copy { margin: 0; font-family: var(--serif); font-size: 22px; color: var(--ink-soft); }
.quick-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.quick-card { background: var(--bg-elevated); padding: 24px 22px; min-height: 210px; display: flex; flex-direction: column; align-items: flex-start; }
.quick-card-num, .work-card-kicker { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .1em; color: var(--accent-blue); }
.quick-card h2 { font-size: 16px; margin: 18px 0 8px; }
.quick-card p { color: var(--ink-soft); font-size: 13.5px; line-height: 1.55; margin: 0 0 16px; }
.quick-card a, .text-link, .work-card-link { margin-top: auto; color: var(--accent-blue); font-family: var(--mono); font-size: 12px; }
.quick-card:hover { background: var(--accent-blue-dim); }
.section-heading-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }
.section-heading-row .text-link { margin: 0 0 9px; flex: none; }
.featured-work-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 36px; }
.featured-work-card { display: flex; flex-direction: column; align-items: flex-start; min-height: 290px; padding: 30px; background: var(--bg-alt); transition: background .18s var(--ease), transform .18s var(--ease); }
.featured-work-card:hover { background: var(--accent-blue-dim); transform: translateY(-3px); }
.featured-work-card h3 { font-family: var(--serif); font-weight: 500; font-size: 27px; line-height: 1.15; max-width: 430px; margin: 18px 0 12px; }
.featured-work-card p { color: var(--ink-soft); max-width: 480px; margin: 0 0 20px; }
.work-card-meta { color: var(--gray); font-family: var(--mono); font-size: 11px; line-height: 1.55; }
.work-card-link { margin-top: auto; padding-top: 22px; }
.featured-work-card-dark { background: var(--ink); color: var(--bg); }
.featured-work-card-dark p, .featured-work-card-dark .work-card-meta { color: rgba(245,243,238,.72); }
.featured-work-card-dark .work-card-kicker, .featured-work-card-dark .work-card-link { color: #9ec0cf; }
.featured-work-card-dark:hover { background: var(--accent-blue); }
.proof-layout, .about-preview-grid, .research-preview-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 72px; align-items: center; }
.proof-summary { border: 1px solid var(--line-strong); background: var(--glass); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); padding: 26px; box-shadow: var(--glass-sheen), 8px 8px 0 rgba(22,22,22,.06); }
.proof-summary-head, .proof-result { display: flex; flex-direction: column; gap: 5px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.proof-summary-head span, .proof-result span, .twin-summary span, .work-index-meta span, .contact-grid span, .research-principles span { font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: .1em; color: var(--gray); }
.proof-summary-head strong, .proof-result strong { font-family: var(--mono); font-size: 15px; font-weight: 500; }
.proof-chain { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; padding: 22px 0; font-family: var(--mono); font-size: 11px; color: var(--ink-soft); }
.proof-chain i { color: var(--accent-blue); font-style: normal; }
.proof-result { border-top: 1px dashed var(--line); border-bottom: none; padding-top: 18px; padding-bottom: 0; }
.proof-result strong { color: var(--accent-red); }
.proof-summary > p { margin: 22px 0 0; font-family: var(--serif); font-style: italic; font-size: 18px; }
.about-preview-copy { max-width: 620px; color: var(--ink-soft); font-size: 18px; line-height: 1.65; margin: 0 0 20px; }
.research-preview-grid .section-intro { margin-bottom: 24px; }
.method-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.method-strip > div { background: var(--bg-elevated); padding: 20px; }
.method-strip span, .capability-grid span { display: block; font-family: var(--mono); font-size: 11px; color: var(--accent-blue); margin-bottom: 15px; }
.method-strip strong { display: block; font-size: 15px; margin-bottom: 7px; }
.method-strip p { color: var(--gray); font-size: 13px; line-height: 1.5; margin: 0; }
.work-index-card { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: 40px; align-items: center; border: 1px solid var(--line); background: var(--glass); padding: 30px; }
.work-index-card h2 { font-family: var(--serif); font-size: 32px; line-height: 1.16; font-weight: 500; max-width: 560px; margin: 16px 0; }
.work-index-card p { color: var(--ink-soft); max-width: 560px; margin: 0 0 24px; }
.work-index-card .work-figure { margin: 0; }
.work-index-card .work-figure img { aspect-ratio: 16 / 9; object-fit: cover; }
.work-index-meta, .twin-summary, .contact-grid, .research-principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 28px; }
.work-index-meta > div, .twin-summary > div, .contact-grid > div, .research-principles > div { display: flex; flex-direction: column; gap: 8px; background: var(--bg-elevated); padding: 18px; }
.work-index-meta strong, .twin-summary strong, .contact-grid strong, .research-principles strong { font-size: 13px; font-weight: 500; line-height: 1.5; }
.work-detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin: 36px 0 28px; }
.work-detail-grid h3 { font-size: 15px; margin-bottom: 8px; }
.work-detail-grid p { color: var(--ink-soft); font-size: 14px; margin: 0; }
.graph-actions, .twin-toolbar, .demo-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }
.graph-actions .graph-hint { margin: 0; flex: 1 1 320px; }
.graph-text-view { margin-top: 20px; border-top: 1px dashed var(--line); border-bottom: 1px dashed var(--line); padding: 14px 0; }
.graph-text-view summary { cursor: pointer; color: var(--accent-blue); font-family: var(--mono); font-size: 12px; }
.graph-text-view ol { margin: 18px 0 4px; padding-left: 22px; color: var(--ink-soft); font-size: 14px; }
.graph-text-view li { margin-bottom: 8px; }
.graph-text-view .mono-line { display: inline; margin: 0; }
.graph-relation-key { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: center; margin-top: 18px; font-family: var(--mono); font-size: 11px; color: var(--gray); }
.graph-relation-key span { text-transform: uppercase; letter-spacing: .08em; color: var(--ink); }
.graph-relation-key i { font-style: normal; }
.relation-green { color: var(--accent-green); }
.relation-red { color: var(--accent-red); }
.relation-neutral { color: var(--gray); }
.twin-toolbar { justify-content: space-between; margin-bottom: 20px; }
.twin-toolbar .twin-modes { margin-bottom: 0; }
.demo-controls { margin-bottom: 4px; }
.demo-progress { font-family: var(--mono); font-size: 11px; color: var(--gray); }
.proof-summary-wide { margin-top: 28px; }
.about-profile { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 32px; align-items: start; }
.about-profile .about-lede { margin-top: 0; }
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 36px; }
.capability-grid article { background: var(--bg-elevated); padding: 22px; }
.capability-grid h3 { font-size: 16px; margin: 0 0 8px; }
.capability-grid p { color: var(--ink-soft); font-size: 13.5px; line-height: 1.55; margin: 0; }
.capability-stack { font-family: var(--mono); color: var(--gray); font-size: 12px; line-height: 1.8; margin: 22px 0 0; }
.writing-intro { display: flex; gap: 20px; align-items: flex-start; border-left: 2px solid var(--accent-blue); padding: 4px 0 4px 20px; margin-bottom: 44px; }
.writing-intro p { color: var(--ink-soft); max-width: 640px; margin: 0; }
.writing-list { border-top: 1px solid var(--line); }
.writing-list article { padding: 24px 0; border-bottom: 1px solid var(--line); }
.writing-list article > span { font-family: var(--mono); font-size: 11px; text-transform: uppercase; color: var(--accent-green); letter-spacing: .08em; }
.writing-list h2 { font-family: var(--serif); font-weight: 500; font-size: 23px; margin: 8px 0 4px; }
.writing-list p { color: var(--ink-soft); margin: 0; }
.article-hero-contact .contact-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.contact-links { margin-top: 40px; }
.e8-canvas-wrap { min-height: 300px; position: relative; }
.e8-loading, .e8-fallback { position: absolute; inset: 0; display: grid; place-items: center; margin: 0; padding: 24px; text-align: center; color: var(--gray); font-family: var(--mono); font-size: 12px; }
.e8-fallback { max-width: 560px; margin: auto; }

/* ---------- Framework atlas ---------- */
.framework-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.framework-card { background: var(--bg-elevated); padding: 28px; display: flex; flex-direction: column; min-height: 100%; }
.framework-card-wide { grid-column: 1 / -1; }
.framework-card-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 18px; }
.framework-card h2 { font-family: var(--serif); font-size: clamp(24px, 3vw, 34px); line-height: 1.12; font-weight: 500; margin: 0 0 12px; }
.framework-card p { color: var(--ink-soft); max-width: 650px; margin: 0 0 22px; }
.framework-card-foot { display: flex; justify-content: space-between; align-items: center; gap: 18px; margin-top: 22px; padding-top: 16px; border-top: 1px dashed var(--line); font-family: var(--mono); font-size: 11px; color: var(--gray); }
.framework-stack { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 0; padding: 0; }
.framework-stack li { display: grid; grid-template-columns: 32px minmax(0, .65fr) minmax(0, 1fr); gap: 12px; align-items: baseline; background: var(--bg); padding: 12px 14px; }
.framework-stack span, .framework-loop span { font-family: var(--mono); color: var(--accent-blue); font-size: 11px; }
.framework-stack strong { font-size: 13px; }
.framework-stack small { color: var(--gray); font-family: var(--mono); font-size: 10.5px; line-height: 1.45; }
.authority-ladder { display: flex; flex-direction: column; gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 4px 0 22px; }
.authority-zone { display: flex; flex-direction: column; gap: 7px; padding: 18px; background: var(--bg); }
.authority-zone span, .observatory-protocol span { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--gray); }
.authority-zone strong { font-size: 15px; line-height: 1.35; }
.authority-zone small { color: var(--gray); font-size: 12.5px; }
.authority-governed { background: var(--accent-green-dim); }
.authority-governed span { color: var(--accent-green); }
.authority-line { background: var(--bg-elevated); padding: 9px 16px; text-align: center; font-family: var(--mono); font-size: 10px; letter-spacing: .11em; text-transform: uppercase; color: var(--accent-blue); }
.framework-loop { list-style: none; margin: 4px 0 22px; padding: 0; border-top: 1px solid var(--line); }
.framework-loop li { display: grid; grid-template-columns: 32px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.framework-loop strong { font-size: 14px; font-weight: 600; }
.proof-steps { display: flex; align-items: stretch; gap: 10px; margin: 4px 0 24px; }
.proof-steps > div { flex: 1; min-width: 0; padding: 16px; border: 1px solid var(--line); background: var(--bg); }
.proof-steps > div span, .proof-steps > div small { display: block; }
.proof-steps > div span { font-family: var(--mono); font-size: 12px; color: var(--accent-blue); text-transform: uppercase; letter-spacing: .06em; }
.proof-steps > div small { margin-top: 8px; color: var(--gray); font-size: 12px; line-height: 1.4; }
.proof-steps i { display: grid; place-items: center; color: var(--accent-blue); font-style: normal; }
.proof-step-result { border-color: var(--accent-green) !important; background: var(--accent-green-dim) !important; }
.proof-step-result span { color: var(--accent-green) !important; }
.framework-card .text-link, .framework-card .btn { margin-top: auto; align-self: flex-start; }

/* ---------- Observatory ---------- */
.observatory-callout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .85fr); gap: 72px; align-items: end; padding-bottom: 48px; border-bottom: 1px solid var(--line); }
.observatory-callout .section-title { margin: 0; }
.observatory-callout > p { color: var(--ink-soft); font-size: 18px; line-height: 1.65; margin: 0; }
.observatory-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 48px; }
.observatory-grid article { background: var(--bg-elevated); padding: 24px; }
.observatory-grid h3 { font-family: var(--serif); font-weight: 500; font-size: 23px; margin: 24px 0 8px; }
.observatory-grid p { color: var(--ink-soft); font-size: 13.5px; line-height: 1.55; margin: 0; }
.observatory-protocol { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 32px; }
.observatory-protocol > div { display: flex; flex-direction: column; gap: 10px; background: var(--bg); padding: 20px; }
.observatory-protocol strong { font-size: 14px; line-height: 1.45; }
.observatory-note { margin-top: 20px; }

/* ---------- Editorial plate details ---------- */
.article-hero, .section { position: relative; }
.article-hero::after, .section::after { content: ""; position: absolute; right: 32px; top: 0; width: 1px; height: 28px; background: var(--line-strong); opacity: .55; }
.article-hero::before, .section::before { content: ""; position: absolute; right: 32px; top: 0; width: 28px; height: 1px; background: var(--line-strong); opacity: .55; }
.featured-work-card, .quick-card, .project-card, .research-item, .work-index-card, .verify-box, .twin-canvas-wrap, .fde-stack-figure, .e8-figure, .lab-box { position: relative; overflow: hidden; }
.featured-work-card::after, .quick-card::after, .project-card::after, .research-item::after { content: ""; position: absolute; top: 0; right: 0; width: 18px; height: 18px; border-top: 1px solid currentColor; border-right: 1px solid currentColor; opacity: .18; pointer-events: none; }
.section-alt .quick-card, .section-alt .project-card { background: var(--bg); }
.hero-proof-list li { transition: padding-left .22s var(--ease), background .22s var(--ease); }
.hero-proof-list li:hover { padding-left: 6px; background: linear-gradient(90deg, transparent, var(--accent-blue-dim)); }
.quick-card, .project-card { transition: background .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease); }
.quick-card:hover, .project-card:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(22,22,22,.06); }
.work-index-card { box-shadow: var(--glass-sheen), 10px 10px 0 rgba(22,22,22,.055); }
.work-index-card .work-figure img { filter: saturate(.8) contrast(.98); transition: filter .3s var(--ease), transform .3s var(--ease); }
.work-index-card:hover .work-figure img { filter: saturate(1) contrast(1); transform: scale(1.012); }
.section-contact { background: linear-gradient(180deg, transparent, rgba(47,93,115,.045)); }

@media (max-width: 980px) {
  .article-hero::after, .section::after { right: 20px; }
  .article-hero::before, .section::before { right: 20px; }
}

@media (max-width: 980px) {
  .quick-grid, .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .method-strip { grid-template-columns: repeat(3, 1fr); }
  .work-index-card, .proof-layout, .about-preview-grid, .research-preview-grid { gap: 40px; }
  .observatory-grid, .observatory-protocol { grid-template-columns: repeat(2, 1fr); }
  .observatory-callout { gap: 40px; }
}

@media (max-width: 720px) {
  .article-hero { padding: 72px 0 40px; }
  .prose { padding: 48px 0; }
  .prose h2 { font-size: 22px; margin-top: 40px; }
  .hero-compact { padding-top: 82px; padding-bottom: 62px; }
  .hero-proof { margin-top: 8px; }
  .proof-plate-meta { align-items: flex-start; flex-direction: column; gap: 8px; }
  .article-hero::after, .section::after, .article-hero::before, .section::before { display: none; }
  .quick-intro, .section-heading-row { display: block; }
  .quick-intro-copy { font-size: 20px; margin-top: 8px; }
  .section-heading-row .text-link { display: inline-block; margin-top: 16px; }
  .quick-grid, .featured-work-grid, .method-strip, .work-index-card, .work-index-meta, .twin-summary, .contact-grid, .research-principles, .work-detail-grid, .capability-grid { grid-template-columns: 1fr; }
  .featured-work-card { min-height: 250px; }
  .proof-layout, .about-preview-grid, .research-preview-grid { grid-template-columns: 1fr; gap: 24px; }
  .work-index-card { padding: 22px; }
  .work-index-card h2 { font-size: 27px; }
  .about-profile { grid-template-columns: 1fr; }
  .writing-intro { display: block; }
  .writing-intro .stamp { display: inline-block; margin-bottom: 12px; }
  .framework-grid { grid-template-columns: 1fr; }
  .framework-card-wide { grid-column: auto; }
  .framework-card { padding: 22px; }
  .framework-stack { grid-template-columns: 1fr; }
  .framework-stack li { grid-template-columns: 30px 1fr; }
  .framework-stack small { grid-column: 2; }
  .framework-card-foot { align-items: flex-start; flex-direction: column; }
  .proof-steps { flex-direction: column; }
  .proof-steps i { transform: rotate(90deg); min-height: 18px; }
  .observatory-callout { grid-template-columns: 1fr; gap: 24px; padding-bottom: 32px; }
  .observatory-grid, .observatory-protocol { grid-template-columns: 1fr; margin-top: 32px; }
}