/* ============================================================
   Cogniron — Reading template (articles · case studies · newsletter)
   Extends homepage.css ("Steel": Zinc + Indigo). Editorial,
   research-paper register. Type-driven — evidence panels and
   mono captions carry weight instead of stock photography.
   ============================================================ */

/* ── Breadcrumb ──────────────────────────────────────── */
.crumb { display: flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; color: var(--text-tertiary); flex-wrap: wrap; }
.crumb a { color: var(--text-secondary); text-decoration: none; transition: color 140ms ease; }
.crumb a:hover { color: var(--accent); }
.crumb .sep { opacity: 0.5; }
.crumb .here { color: var(--text-primary); }

/* ── Reading masthead ────────────────────────────────── */
.art-hero { padding: 36px 0 0; position: relative; overflow: hidden; }
.art-hero::after {
  content: ""; position: absolute; top: -36%; right: -10%; width: 560px; height: 480px;
  background: radial-gradient(ellipse at center, var(--accent-glow), transparent 70%);
  pointer-events: none; z-index: 0;
}
.art-head { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; padding-top: 38px; }
.art-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.art-tag { font-family: var(--font-mono); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); background: var(--accent-subtle); border-radius: 999px; padding: 5px 13px; }
.art-readtime { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; color: var(--text-tertiary); }
.art-title { margin-top: 24px; font-size: clamp(34px, 4.4vw, 56px); line-height: 1.05; letter-spacing: -0.026em; font-weight: 500; color: var(--text-primary); text-wrap: balance; max-width: 20ch; }
.art-dek { margin-top: 24px; font-size: 21px; line-height: 1.5; color: var(--text-secondary); max-width: 60ch; text-wrap: pretty; }
.art-byline { margin-top: 34px; padding: 22px 0; border-top: 1px solid var(--border-default); border-bottom: 1px solid var(--border-subtle); display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.art-byline .av { width: 42px; height: 42px; border-radius: 999px; flex: none; display: grid; place-items: center; font-family: var(--font-mono); font-size: 14px; font-weight: 600; color: var(--accent); background: var(--accent-subtle); border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent); }
.art-byline .who { font-size: 15px; font-weight: 600; color: var(--text-primary); line-height: 1.25; }
.art-byline .role { font-family: var(--font-mono); font-size: 12px; color: var(--text-tertiary); }
.art-byline .bsep { width: 1px; height: 30px; background: var(--border-default); margin: 0 4px; }
.art-byline .when { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.02em; color: var(--text-secondary); }
.art-byline .share { margin-left: auto; display: flex; gap: 8px; }
.art-byline .share a { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 9px; border: 1px solid var(--border-subtle); color: var(--text-tertiary); font-family: var(--font-mono); font-size: 12px; text-decoration: none; transition: color 140ms ease, border-color 140ms ease; }
.art-byline .share a:hover { color: var(--accent); border-color: var(--accent); }

/* ── Prose body ──────────────────────────────────────── */
.art-body { padding: 56px 0 0; }
.prose { max-width: 720px; margin: 0 auto; }
.prose > * + * { margin-top: 26px; }
.prose p { font-size: 18.5px; line-height: 1.75; color: color-mix(in srgb, var(--text-primary) 88%, var(--bg-canvas)); text-wrap: pretty; }
.prose .lead-p { font-size: 22px; line-height: 1.6; font-weight: 400; color: var(--text-primary); }
.prose h2 { margin-top: 56px; font-size: 29px; line-height: 1.18; font-weight: 600; letter-spacing: -0.018em; color: var(--text-primary); text-wrap: balance; }
.prose h3 { margin-top: 40px; font-size: 21px; line-height: 1.3; font-weight: 600; letter-spacing: -0.01em; color: var(--text-primary); }
.prose h2 + p, .prose h3 + p { margin-top: 16px; }
.prose ul, .prose ol { padding-left: 24px; }
.prose li { font-size: 18px; line-height: 1.7; color: color-mix(in srgb, var(--text-primary) 88%, var(--bg-canvas)); }
.prose li + li { margin-top: 11px; }
.prose li::marker { color: var(--accent); }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; transition: color 140ms ease; }
.prose a:hover { color: var(--accent-hover); }
.prose strong { font-weight: 650; color: var(--text-primary); }
.prose em { font-style: italic; }
.prose code { font-family: var(--font-mono); font-size: 0.88em; background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: 6px; padding: 2px 6px; color: var(--text-primary); }
.prose hr { border: none; height: 1px; background: var(--border-subtle); margin: 48px auto; max-width: 120px; }

/* Pull quote */
.pull { max-width: 800px; margin: 52px auto; }
.pull p { font-size: clamp(24px, 2.4vw, 31px); line-height: 1.3; font-weight: 500; letter-spacing: -0.018em; color: var(--text-primary); text-wrap: balance; }
.pull .accent-bar { margin-bottom: 22px; }
.pull cite { display: block; margin-top: 18px; font-family: var(--font-mono); font-size: 13px; font-style: normal; letter-spacing: 0.02em; color: var(--text-tertiary); }

/* Evidence ledger panel (on-brand mono block) */
.ev { max-width: 760px; margin: 44px auto; border: 1px solid var(--border-subtle); border-radius: 14px; overflow: hidden; background: var(--bg-elevated); box-shadow: 0 1px 0 rgba(0,0,0,0.02), 0 30px 64px -50px rgba(9,9,11,0.3); }
.ev-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 13px 18px; border-bottom: 1px solid var(--border-subtle); background: var(--bg-subtle); }
.ev-head .run { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em; color: var(--text-secondary); }
.ev-head .run b { color: var(--text-primary); font-weight: 600; }
.ev-verdict { font-family: var(--font-mono); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; padding: 4px 11px; border-radius: 999px; }
.ev-verdict.hold { color: var(--warning); background: color-mix(in srgb, var(--warning) 14%, transparent); }
.ev-verdict.review { color: var(--accent); background: var(--accent-subtle); }
.ev-verdict.pass { color: var(--success); background: color-mix(in srgb, var(--success) 14%, transparent); }
.ev-body { padding: 8px 18px 14px; }
.ev-row { display: grid; grid-template-columns: 16px 1fr auto; gap: 12px; align-items: center; padding: 11px 0; border-bottom: 1px solid var(--border-subtle); }
.ev-row:last-child { border-bottom: none; }
.ev-row .dot { width: 8px; height: 8px; border-radius: 999px; }
.ev-row.ok .dot { background: var(--status-pass); }
.ev-row.no .dot { background: var(--status-fail); }
.ev-row .t { font-family: var(--font-mono); font-size: 13px; color: var(--text-secondary); }
.ev-row.no .t { color: var(--text-primary); }
.ev-row .sc { font-family: var(--font-mono); font-size: 12.5px; font-weight: 600; color: var(--text-tertiary); }
.ev-row .sc.flag { color: var(--danger); }

/* Key-finding callout */
.note { max-width: 760px; margin: 44px auto; border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border-subtle)); border-radius: 14px; padding: 22px 26px; background: var(--accent-subtle); }
.note .lbl { display: inline-flex; align-items: center; gap: 11px; font-family: var(--font-mono); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 12px; }
.note p { font-size: 17.5px; line-height: 1.6; color: var(--text-primary); text-wrap: pretty; }

/* Figure placeholder (where a diagram goes) */
.figph { max-width: 800px; margin: 44px auto; }
.figph .ph { height: 320px; border-radius: 14px; border: 1px solid var(--border-subtle); display: grid; place-items: center; background-image: repeating-linear-gradient(135deg, var(--bg-surface), var(--bg-surface) 11px, var(--bg-subtle) 11px, var(--bg-subtle) 22px); }
.figph .ph span { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-tertiary); background: var(--bg-canvas); padding: 7px 14px; border-radius: 999px; border: 1px solid var(--border-subtle); }
.figph figcaption { margin-top: 14px; font-family: var(--font-mono); font-size: 12px; color: var(--text-tertiary); text-align: center; }

/* Author footer + tags */
.art-author { max-width: 760px; margin: 60px auto 0; padding-top: 30px; border-top: 1px solid var(--border-default); display: flex; gap: 18px; align-items: flex-start; }
.art-author .av { width: 54px; height: 54px; border-radius: 999px; flex: none; display: grid; place-items: center; font-family: var(--font-mono); font-size: 16px; font-weight: 600; color: var(--accent); background: var(--accent-subtle); border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent); }
.art-author .who { font-size: 16px; font-weight: 600; color: var(--text-primary); }
.art-author .role { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-tertiary); margin-top: 2px; }
.art-author .bio { margin-top: 12px; font-size: 15px; line-height: 1.62; color: var(--text-secondary); max-width: 58ch; text-wrap: pretty; }
.art-tags { max-width: 760px; margin: 30px auto 0; display: flex; flex-wrap: wrap; gap: 8px; }
.art-tags .tg { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-secondary); border: 1px solid var(--border-subtle); border-radius: 999px; padding: 6px 13px; text-decoration: none; transition: color 140ms ease, border-color 140ms ease; }
.art-tags .tg:hover { color: var(--accent); border-color: var(--accent); }

/* Related reading */
.related { border-top: 1px solid var(--border-subtle); }
.related-head { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; margin-bottom: 30px; }
.rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.rel-card { display: flex; flex-direction: column; padding: 24px; border: 1px solid var(--border-subtle); border-radius: 14px; background: var(--bg-elevated); text-decoration: none; color: inherit; transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease; }
.rel-card:hover { transform: translateY(-3px); border-color: var(--border-default); box-shadow: 0 26px 56px -44px rgba(9,9,11,0.32); }
.rel-card .rc-tag { font-family: var(--font-mono); font-size: 10.5px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); }
.rel-card .rc-title { margin-top: 14px; font-size: 18px; font-weight: 600; line-height: 1.28; letter-spacing: -0.012em; color: var(--text-primary); text-wrap: pretty; transition: color 200ms ease; }
.rel-card:hover .rc-title { color: var(--accent-hover); }
.rel-card .rc-meta { margin-top: auto; padding-top: 18px; font-family: var(--font-mono); font-size: 11px; color: var(--text-tertiary); }

/* ── Case study specifics ────────────────────────────── */
.cs-metric { margin-top: 30px; display: flex; align-items: baseline; gap: 14px; }
.cs-metric .num { font-size: clamp(56px, 7vw, 88px); font-weight: 600; letter-spacing: -0.04em; line-height: 0.9; color: var(--accent); font-variant-numeric: tabular-nums; }
.cs-metric .unit { font-size: 20px; font-weight: 600; color: var(--text-primary); max-width: 16ch; }
.cs-glance { max-width: 820px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border-subtle); border: 1px solid var(--border-subtle); border-radius: 14px; overflow: hidden; }
.cs-stat { background: var(--bg-canvas); padding: 22px 24px; }
.cs-stat .l { font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-tertiary); }
.cs-stat .v { margin-top: 9px; font-size: 17px; font-weight: 600; color: var(--text-primary); line-height: 1.3; }
.cs-results { max-width: 760px; margin: 44px auto; border: 1px solid var(--border-subtle); border-radius: 14px; background: var(--bg-subtle); padding: 28px 30px; }
.cs-results .rh { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 20px; }
.cs-bar { display: grid; grid-template-columns: 130px 1fr; gap: 16px; align-items: center; padding: 12px 0; border-top: 1px solid var(--border-subtle); }
.cs-bar:first-of-type { border-top: none; }
.cs-bar .bl { font-size: 14px; color: var(--text-secondary); }
.cs-bar .track { height: 12px; border-radius: 999px; background: var(--bg-surface); position: relative; overflow: hidden; }
.cs-bar .fill { position: absolute; inset: 0 auto 0 0; border-radius: 999px; background: var(--accent); }
.cs-bar .fill.was { background: var(--border-default); }
.cs-bar .bv { font-family: var(--font-mono); font-size: 12px; color: var(--text-primary); }
.cs-barrow { display: flex; align-items: center; gap: 12px; }
.cs-barrow .track { flex: 1; }

/* ── Newsletter issue specifics ──────────────────────── */
.nl-issuemeta { display: inline-flex; align-items: center; gap: 12px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: var(--text-tertiary); text-transform: uppercase; }
.nl-issuemeta b { color: var(--accent); }
.nl-section { max-width: 720px; margin: 0 auto; }
.nl-section + .nl-section { margin-top: 52px; padding-top: 52px; border-top: 1px solid var(--border-subtle); }
.nl-eyebrow { display: inline-flex; align-items: center; gap: 11px; font-family: var(--font-mono); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 16px; }
.nl-links { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; }
.nl-link { display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center; padding: 18px 6px; border-bottom: 1px solid var(--border-subtle); text-decoration: none; color: inherit; transition: padding-left 200ms ease; }
.nl-link:hover { padding-left: 12px; }
.nl-link .nll-t { font-size: 16px; font-weight: 600; color: var(--text-primary); transition: color 180ms ease; }
.nl-link:hover .nll-t { color: var(--accent-hover); }
.nl-link .nll-src { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-tertiary); }

/* ── Section rhythm helpers ──────────────────────────── */
.reading-cta { padding: 0; }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 900px) {
  .rel-grid { grid-template-columns: 1fr; }
  .cs-glance { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .prose, .pull, .ev, .note, .figph, .art-author, .art-tags { max-width: 100%; }
  .art-byline .share { margin-left: 0; width: 100%; }
  .cs-glance { grid-template-columns: 1fr; }
  .cs-bar { grid-template-columns: 1fr; gap: 8px; }
}