/* Shared styles for all lexenne.com/slf sub-pages (essays + deep-dives).
   Category is set via a body class: .cat-writing or .cat-deepdives.
   Each category carries its own wayfinding tint, accent, and paper texture. */

:root {
  --paper:    #F2EEE4;
  --ink:      #1B1A16;
  --ink-soft: #514D44;
  --ink-faint:#87817395;
  --line:     rgba(27, 26, 22, 0.16);
  --line-soft:rgba(27, 26, 22, 0.08);
  --blue:     #1C3D5A;
  --rust:     #9C4A23;
  --serif: "Fraunces", Georgia, serif;
  --sans:  "IBM Plex Sans", system-ui, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans); color: var(--ink); line-height: 1.7; font-size: 18px;
  background-color: var(--page-tint, var(--paper));
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}

/* ---- category identities ---- */
body.cat-writing {
  --page-tint: #EAE3D2; --accent: #8A6B33;
  /* ruled parchment writing paper (muted, less yellow) + light fibrous texture */
  background-image:
    linear-gradient(rgba(74,56,26,0.10) 1px, transparent 1px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.55' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.30 0 0 0 0 0.26 0 0 0 0 0.16 0 0 0 0.07 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)'/%3E%3C/svg%3E");
  background-size: 100% 34px, 200px 200px;
}
body.cat-deepdives {
  --page-tint: #C9DCEA; --accent: #14546E;
  background-color: #BFD4E4;
  /* underwater: surface light + caustic ripples + dot grid + depth gradient */
  background-image:
    radial-gradient(140% 55% at 50% -12%, rgba(255,255,255,0.55), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='340' height='340'%3E%3Cfilter id='w'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.011 0.017' numOctaves='2' seed='4'/%3E%3CfeColorMatrix values='0 0 0 0 0.84 0 0 0 0 0.92 0 0 0 0 1 0 0 0 0.13 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23w)'/%3E%3C/svg%3E"),
    radial-gradient(rgba(12,52,75,0.13) 1px, transparent 1px),
    linear-gradient(180deg, #D4E3EE 0%, #A9C6DB 100%);
  background-size: 100% 100%, 340px 340px, 22px 22px, 100% 100%;
  background-attachment: fixed, fixed, scroll, fixed;
}
body.cat-career {
  --page-tint: #F2EEE4; --accent: #1C3D5A;
  /* graph paper, the "spine" page */
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px), linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 32px 32px;
}
body.cat-spa {
  --page-tint: #DDE3E2; --accent: #2E5F5C;
  /* "verifiable ledger": vertical column rules + faint hash-noise patina, the look of a long-lived audit register */
  background-color: #D5DCDB;
  background-image:
    linear-gradient(90deg, rgba(46,95,92,0.10) 1px, transparent 1px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='v'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.62' numOctaves='2' seed='7'/%3E%3CfeColorMatrix values='0 0 0 0 0.18 0 0 0 0 0.37 0 0 0 0 0.36 0 0 0 0.09 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23v)'/%3E%3C/svg%3E"),
    radial-gradient(120% 50% at 50% -10%, rgba(255,255,255,0.40), transparent 55%);
  background-size: 64px 100%, 240px 240px, 100% 100%;
  background-attachment: scroll, fixed, fixed;
}

/* ---- SPA/SLF spec-document elements (used only on cat-spa pages) ---- */
.cat-spa .sheet-no {
  font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.20em; font-weight: 600;
  text-transform: uppercase; color: var(--accent); display: inline-flex; align-items: center; gap: 0.5rem; white-space: nowrap;
}
.cat-spa .sheet-no::before { content: ""; width: 8px; height: 8px; border-radius: 1px; background: var(--accent); }

/* sticky section header used on the SLF overview */
.cat-spa .spec-head {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0.4rem 1rem;
  border-bottom: 1px solid var(--line); padding-bottom: 0.9rem; margin: 3.4rem 0 1.6rem;
}
.cat-spa .spec-head h2 { margin: 0; }
.cat-spa .spec-head .sheet-no { margin-left: auto; }

/* the substrate / lens / frame diagram plate (full-width on the article) */
.cat-spa .diagram-plate {
  position: relative; margin: 2rem 0 0.6rem; border: 1px solid var(--line); border-radius: 4px;
  background: color-mix(in srgb, var(--page-tint) 30%, #fff);
  padding: 1.6rem clamp(0.8rem, 3vw, 1.6rem); overflow: hidden;
}
.cat-spa .diagram-plate::after {
  content: ""; position: absolute; inset: 0; opacity: 0.4; pointer-events: none;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px), linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 26px 26px;
}
.cat-spa .diagram-plate svg { position: relative; z-index: 1; width: 100%; height: auto; display: block; }
.cat-spa .diagram-plate .tick { position: absolute; width: 13px; height: 13px; border: 1px solid var(--accent); z-index: 2; }
.cat-spa .diagram-plate .tick.tl { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.cat-spa .diagram-plate .tick.tr { top: 10px; right: 10px; border-left: 0; border-bottom: 0; }
.cat-spa .diagram-plate .tick.bl { bottom: 10px; left: 10px; border-right: 0; border-top: 0; }
.cat-spa .diagram-plate .tick.br { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }

/* primitive blocks under the diagram */
.cat-spa .primitive-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 1.6rem 0 2rem; }
@media (max-width: 720px) { .cat-spa .primitive-grid { grid-template-columns: 1fr; } }
.cat-spa .primitive {
  border: 1px solid var(--line); border-radius: 4px; padding: 1rem 1.1rem;
  background: color-mix(in srgb, var(--page-tint) 35%, #fff);
}
.cat-spa .primitive .ptag {
  font-family: var(--sans); font-size: 0.66rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin-bottom: 0.4rem; display: block;
}
.cat-spa .primitive .pname { font-family: var(--serif); font-size: 1.18rem; font-weight: 600; margin-bottom: 0.4rem; }
.cat-spa .primitive .pdesc { font-size: 0.92rem; color: var(--ink-soft); line-height: 1.55; }

/* two-column scope grid (IN / OUT) */
.cat-spa .scope-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin: 1.6rem 0 2rem; }
@media (max-width: 640px) { .cat-spa .scope-grid { grid-template-columns: 1fr; } }
.cat-spa .scope-col {
  border: 1px solid var(--line); border-radius: 4px; padding: 1rem 1.2rem;
  background: color-mix(in srgb, var(--page-tint) 28%, #fff);
}
.cat-spa .scope-col .scope-head {
  font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin-bottom: 0.7rem; padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}
.cat-spa .scope-col ul { margin: 0; padding-left: 1.1rem; }
.cat-spa .scope-col li { font-size: 0.94rem; color: var(--ink-soft); margin-bottom: 0.4rem; line-height: 1.5; }

/* compact landscape table */
.cat-spa .landscape { width: 100%; border-collapse: collapse; font-size: 0.88rem; margin: 1.4rem 0 1rem; }
.cat-spa .landscape th, .cat-spa .landscape td { text-align: left; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.cat-spa .landscape thead th { font-family: var(--sans); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); font-weight: 600; border-bottom: 1px solid var(--accent); }
.cat-spa .landscape td { color: var(--ink-soft); }
.cat-spa .landscape .proto { font-family: var(--serif); color: var(--ink); font-weight: 600; }
.cat-spa .landscape .stance { color: var(--ink); }

/* "stack" composition figure (SLF sits above AATWG / AP2 / Entra / ERC-8004) */
.cat-spa .compose-stack { margin: 1.4rem 0 2rem; max-width: 60ch; }
.cat-spa .compose-stack .lyr {
  border: 1px solid var(--line); border-radius: 3px; padding: 0.75rem 1rem; margin-bottom: 0.4rem;
  background: color-mix(in srgb, var(--page-tint) 28%, #fff);
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
}
.cat-spa .compose-stack .lyr.is-top { background: color-mix(in srgb, var(--accent) 14%, #fff); border-color: var(--accent); }
.cat-spa .compose-stack .lyr-name { font-family: var(--serif); font-weight: 600; font-size: 1.04rem; }
.cat-spa .compose-stack .lyr-tag { font-family: var(--sans); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); font-weight: 600; }

/* pressure-test elements used on deep-dive pages */
.cat-spa .draft-banner {
  font-family: var(--sans); font-size: 0.86rem; color: var(--ink);
  background: color-mix(in srgb, var(--accent) 12%, #fff);
  border: 1px solid var(--accent); border-radius: 3px;
  padding: 0.8rem 1rem; margin: 0 0 2rem; max-width: 70ch;
  line-height: 1.5;
}
.cat-spa .draft-banner strong { color: var(--accent); font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.74rem; display: block; margin-bottom: 0.3rem; }

.cat-spa .tension {
  border-left: 3px dashed var(--rust);
  background: color-mix(in srgb, var(--rust) 6%, #fff);
  padding: 0.9rem 1.1rem; margin: 1.4rem 0; max-width: 66ch;
  border-radius: 0 3px 3px 0;
}
.cat-spa .tension .t-label {
  font-family: var(--sans); font-size: 0.66rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--rust); font-weight: 600;
  margin-bottom: 0.3rem; display: block;
}
.cat-spa .tension p { margin: 0; font-size: 0.94rem; line-height: 1.55; }
.cat-spa .tension p + p { margin-top: 0.5rem; }
.cat-spa .tension .claim { font-style: italic; color: var(--ink); }
.cat-spa .tension .counter { color: var(--ink-soft); }
.cat-spa .tension .counter::before { content: "Counter: "; font-style: normal; color: var(--rust); font-weight: 600; }

.cat-spa .verbatim {
  font-family: var(--serif); font-style: italic; font-size: 1.02rem; line-height: 1.55;
  color: var(--ink); border-left: 2px solid var(--accent);
  padding: 0.5rem 0 0.5rem 1.2rem; margin: 1.4rem 0; max-width: 64ch;
}
.cat-spa .verbatim cite {
  display: block; margin-top: 0.5rem; font-style: normal;
  font-family: var(--sans); font-size: 0.78rem; letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.cat-spa .prob-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin: 1.4rem 0 1.4rem; }
.cat-spa .prob-table th, .cat-spa .prob-table td { text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.cat-spa .prob-table thead th { font-family: var(--sans); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); font-weight: 600; border-bottom: 1px solid var(--accent); }
.cat-spa .prob-table td.prob-pct { font-family: var(--sans); font-weight: 600; color: var(--accent); white-space: nowrap; }
.cat-spa .prob-table .outcome { font-family: var(--serif); font-weight: 600; color: var(--ink); white-space: nowrap; }

.cat-spa pre.json-block {
  font-family: ui-monospace, Menlo, "SF Mono", monospace; font-size: 0.82rem; line-height: 1.55;
  background: color-mix(in srgb, var(--page-tint) 22%, #fff);
  border: 1px solid var(--line); border-radius: 4px;
  padding: 0.9rem 1.1rem; margin: 1.2rem 0;
  overflow-x: auto; color: var(--ink);
}
.cat-spa pre.json-block .k { color: var(--accent); }
.cat-spa pre.json-block .s { color: var(--ink-soft); }
.cat-spa pre.json-block .c { color: var(--ink-faint); font-style: italic; }

.cat-spa pre.org-tree {
  font-family: ui-monospace, Menlo, "SF Mono", monospace; font-size: 0.86rem; line-height: 1.7;
  background: color-mix(in srgb, var(--page-tint) 28%, #fff);
  border: 1px solid var(--line); border-radius: 4px;
  padding: 1rem 1.2rem; margin: 1.4rem 0;
  overflow-x: auto; color: var(--ink); white-space: pre;
}
.cat-spa pre.org-tree .n { color: var(--accent); font-weight: 600; }
.cat-spa pre.org-tree .leaf { color: var(--ink); font-weight: 600; }
.cat-spa pre.org-tree .desc { color: var(--ink-soft); font-family: "IBM Plex Sans", system-ui, sans-serif; font-style: italic; }
.cat-spa pre.org-tree .punc { color: var(--ink-faint); }

/* deep-dive index (forthcoming pages) */
.cat-spa .dd-index { margin: 1rem 0 1.4rem; border-top: 1px solid var(--line); }
.cat-spa .dd-row {
  display: grid; grid-template-columns: 2.4rem 1fr auto; align-items: baseline;
  gap: 0.7rem; padding: 0.85rem 0; border-bottom: 1px solid var(--line);
  font-family: var(--sans);
}
.cat-spa .dd-row .dd-no { font-size: 0.74rem; letter-spacing: 0.14em; color: var(--accent); font-weight: 600; }
.cat-spa .dd-row .dd-title { font-family: var(--serif); font-size: 1.04rem; color: var(--ink); }
.cat-spa .dd-row .dd-tag { font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); font-weight: 600; }
.cat-spa .dd-row.is-soon .dd-title { color: var(--ink-faint); font-style: italic; }
.cat-spa a.dd-row { color: inherit; transition: background 0.2s var(--ease); }
.cat-spa a.dd-row:hover { background: color-mix(in srgb, var(--accent) 6%, transparent); }
.cat-spa a.dd-row .dd-tag { color: var(--accent); }

/* SVG diagram theming hook — tokens used by the inline SVG so it inherits the page palette */
.cat-spa .diagram-plate svg .layer { fill: color-mix(in srgb, var(--page-tint) 40%, #fff); stroke: var(--line); stroke-width: 1; }
.cat-spa .diagram-plate svg .layer-frame { fill: color-mix(in srgb, var(--accent) 18%, #fff); stroke: var(--accent); stroke-width: 1.2; }
.cat-spa .diagram-plate svg .layer-lens  { fill: color-mix(in srgb, var(--accent) 10%, #fff); stroke: var(--accent); stroke-width: 1.2; }
.cat-spa .diagram-plate svg .layer-sub   { fill: color-mix(in srgb, var(--accent) 22%, #fff); stroke: var(--accent); stroke-width: 1.2; }
.cat-spa .diagram-plate svg .lbl       { font-family: "IBM Plex Sans", system-ui, sans-serif; font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; fill: var(--accent); font-weight: 600; }
.cat-spa .diagram-plate svg .lbl-name  { font-family: "Fraunces", Georgia, serif; font-size: 22px; fill: var(--ink); font-weight: 600; }
.cat-spa .diagram-plate svg .lbl-desc  { font-family: "IBM Plex Sans", system-ui, sans-serif; font-size: 12px; fill: var(--ink-soft); }
.cat-spa .diagram-plate svg .lbl-side  { font-family: "IBM Plex Sans", system-ui, sans-serif; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; fill: var(--ink-faint); font-weight: 600; }
.cat-spa .diagram-plate svg .arrow     { stroke: var(--accent); stroke-width: 1.5; fill: none; }
.cat-spa .diagram-plate svg .arrow-receipt { stroke: var(--rust); stroke-width: 1.5; fill: none; stroke-dasharray: 4 3; }
.cat-spa .diagram-plate svg .arrow-receipt-head { fill: var(--rust); }
.cat-spa .diagram-plate svg .arrow-head { fill: var(--accent); }
.cat-spa .diagram-plate svg .receipt-pill { fill: color-mix(in srgb, var(--rust) 18%, #fff); stroke: var(--rust); stroke-width: 1; }
.cat-spa .diagram-plate svg .receipt-pill-lbl { fill: var(--rust); font-family: "IBM Plex Sans", system-ui, sans-serif; font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; font-weight: 600; }

/* ---- career timeline ---- */
.timeline { position: relative; padding-left: 1.9rem; margin-top: 1rem; }
.timeline::before { content: ""; position: absolute; left: 0; top: 0.45rem; bottom: 0.45rem; width: 2px; background: linear-gradient(var(--accent), var(--line)); }
.t-item { position: relative; padding-bottom: 2.4rem; }
.t-item:last-child { padding-bottom: 0; }
.t-item::before { content: ""; position: absolute; left: -1.9rem; top: 0.5rem; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); transform: translateX(-3.5px); }
.t-date { font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); font-weight: 600; margin-bottom: 0.3rem; }
.t-title { font-family: var(--serif); font-size: 1.3rem; font-weight: 600; line-height: 1.15; margin-bottom: 0.15rem; }
.t-co { font-family: var(--serif); font-style: italic; font-size: 0.98rem; color: var(--ink-soft); margin-bottom: 0.6rem; }
.t-desc { font-size: 0.98rem; color: var(--ink-soft); max-width: 64ch; }

/* paper grain */
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 9999; opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--blue); color: var(--paper); }
a { color: inherit; text-decoration: none; }

/* ---- header ---- */
header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--page-tint, var(--paper)) 86%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line);
}
.bar {
  max-width: 760px; margin: 0 auto; padding: 0 1.5rem; height: 58px;
  display: flex; align-items: center; justify-content: space-between;
}
.back {
  font-family: var(--sans); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-soft); display: inline-flex; align-items: center; gap: 0.5rem; transition: color 0.25s var(--ease);
}
.back:hover { color: var(--accent); }
.crumb {
  font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); display: inline-flex; align-items: center; gap: 0.5rem;
}
.crumb::before { content: ""; width: 8px; height: 8px; border-radius: 1px; background: var(--accent); }
.bar-contact { display: flex; gap: 1.1rem; align-items: center; }
.bar-contact a { font-family: var(--sans); font-size: 0.74rem; letter-spacing: 0.05em; color: var(--accent); transition: color 0.25s var(--ease); }
.bar-contact a:hover { color: var(--ink); }
@media (max-width: 480px) { .bar-contact { gap: 0.85rem; } .bar-contact a { font-size: 0.7rem; } }

/* ---- SLF mini-site sub-nav (cat-spa pages only) ---- */
.cat-spa .slf-nav {
  position: sticky; top: 58px; z-index: 49;
  background: color-mix(in srgb, var(--page-tint, var(--paper)) 92%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line);
}
.cat-spa .slf-nav .slf-nav-inner {
  max-width: 760px; margin: 0 auto; padding: 0.55rem 1.5rem;
  display: flex; flex-wrap: wrap; gap: 0.35rem 1.1rem; align-items: center;
}
.cat-spa .slf-nav a {
  font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.06em;
  color: var(--ink-soft); white-space: nowrap; transition: color 0.25s var(--ease);
}
.cat-spa .slf-nav a:hover { color: var(--accent); }
.cat-spa .slf-nav a[aria-current="page"] { color: var(--accent); font-weight: 600; border-bottom: 2px solid var(--accent); }
@media (max-width: 480px) {
  .cat-spa .slf-nav .slf-nav-inner { gap: 0.25rem 0.85rem; padding: 0.45rem 1rem; }
  .cat-spa .slf-nav a { font-size: 0.68rem; }
}

/* ---- article ---- */
article { max-width: 760px; margin: 0 auto; padding: clamp(2.5rem, 7vw, 5rem) 1.5rem 4rem; }
.eyebrow {
  font-family: var(--sans); font-size: 0.74rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin-bottom: 1.4rem; display: flex; align-items: center; gap: 0.7rem;
}
.eyebrow .rule { height: 1px; width: 30px; background: var(--accent); }

h1 {
  font-family: var(--serif); font-weight: 600; line-height: 1.06; letter-spacing: -0.015em;
  font-size: clamp(2.1rem, 5.5vw, 3.4rem); margin-bottom: 1.4rem;
}
.lede {
  font-family: var(--serif); font-style: italic; font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  line-height: 1.4; color: var(--ink-soft); margin-bottom: 2.6rem;
  padding-left: 1.2rem; border-left: 2px solid var(--accent);
}
h2 {
  font-family: var(--serif); font-weight: 600; font-size: clamp(1.35rem, 3vw, 1.9rem);
  margin: 2.6rem 0 1rem; line-height: 1.12;
}
article p { margin-bottom: 1.4rem; max-width: 66ch; }
article p strong { font-weight: 600; }
article ul, article ol { max-width: 66ch; margin: 0 0 1.4rem 1.2rem; }
article li { margin-bottom: 0.6rem; }
article li strong { font-weight: 600; }

.pull {
  font-family: var(--serif); font-size: clamp(1.4rem, 3vw, 1.9rem); line-height: 1.3;
  color: var(--blue); margin: 2.6rem 0; padding: 0.4rem 0 0.4rem 1.4rem; border-left: 3px solid var(--blue);
}
code { font-family: ui-monospace, Menlo, "SF Mono", monospace; background: rgba(27,26,22,0.07); padding: 0.1em 0.35em; border-radius: 2px; font-size: 0.9em; }
article em { font-style: italic; color: var(--accent); }
article img { width: 100%; border: 1px solid var(--line); border-radius: 3px; margin: 1.6rem 0; display: block; }
.article-hero { margin-top: 0.5rem; margin-bottom: 2.4rem; }
.callout { background: color-mix(in srgb, var(--page-tint, var(--paper)) 45%, #fff); border-left: 3px solid var(--accent); border-radius: 0 4px 4px 0; padding: 1.1rem 1.4rem; margin: 1.9rem 0; font-size: 1rem; color: var(--ink); line-height: 1.65; max-width: 66ch; }
.callout strong { font-weight: 600; }

/* article subheads */
article h3 { font-family: var(--serif); font-weight: 600; font-size: clamp(1.2rem, 2.4vw, 1.55rem); margin: 2.5rem 0 0.8rem; line-height: 1.15; }

/* data tables */
.table-wrap { overflow-x: auto; margin: 1.8rem 0; max-width: 100%; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 460px; }
.data-table th, .data-table td { text-align: left; padding: 0.6rem 0.85rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.data-table thead th { font-family: var(--sans); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); font-weight: 600; border-bottom: 1px solid var(--accent); }
.data-table td { color: var(--ink-soft); }
.data-table code { font-size: 0.82em; }

/* stacked lists: layers, gaps, numbered patterns, insights */
.stack { margin: 1.9rem 0; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; max-width: 70ch; }
.stack-item { padding: 1rem 1.3rem; border-bottom: 1px solid var(--line); display: flex; gap: 0.9rem; }
.stack-item:last-child { border-bottom: 0; }
.stack-item.is-highlight { background: color-mix(in srgb, var(--accent) 13%, transparent); }
.stack-no { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); font-weight: 600; flex: none; padding-top: 0.15rem; }
.stack-name { font-family: var(--serif); font-size: 1.12rem; font-weight: 600; margin-bottom: 0.2rem; }
.stack-desc { font-size: 0.92rem; color: var(--ink-soft); line-height: 1.6; }

/* ---- figure / diagram placeholder ---- */
figure { margin: 2.4rem 0; }
.plate {
  position: relative; aspect-ratio: 16 / 9; border: 1px solid var(--line); border-radius: 3px;
  background: color-mix(in srgb, var(--page-tint, var(--paper)) 45%, #fff);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.plate::after {
  content: ""; position: absolute; inset: 0; opacity: 0.5; pointer-events: none;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px), linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 26px 26px;
}
.plate .tick { position: absolute; width: 13px; height: 13px; border: 1px solid var(--accent); }
.plate .tick.tl { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.plate .tick.tr { top: 10px; right: 10px; border-left: 0; border-bottom: 0; }
.plate .tick.bl { bottom: 10px; left: 10px; border-right: 0; border-top: 0; }
.plate .tick.br { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }
.plate .ph {
  position: relative; font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ink-faint); text-align: center; padding: 0 1rem;
}
figcaption {
  font-family: var(--sans); font-size: 0.82rem; color: var(--ink-soft); margin-top: 0.7rem;
  display: flex; gap: 0.6rem;
}
figcaption b { color: var(--accent); font-weight: 600; white-space: nowrap; }

/* ---- end / nav ---- */
.end-rule { width: 44px; height: 2px; background: var(--accent); margin: 3rem 0 2rem; }
.more {
  font-family: var(--sans); font-size: 0.82rem; letter-spacing: 0.06em;
  border-bottom: 1px solid var(--ink); padding-bottom: 3px; transition: all 0.25s var(--ease);
}
.more:hover { color: var(--accent); border-color: var(--accent); }

footer { border-top: 1px solid var(--line); margin-top: 2rem; }
footer .fbar { max-width: 760px; margin: 0 auto; padding: 1.8rem 1.5rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.8rem; }
footer span { font-family: var(--sans); font-size: 0.72rem; color: var(--ink-faint); letter-spacing: 0.06em; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }