/* ═══════════════════════════════════════════════════════════════════
   DodecaGreen — Brand stylesheet
   Shared across the portal: landing, principle guides, calculator tools.
   Identity: Newsreader (display) · IBM Plex Sans (body) · IBM Plex Mono (labels)
   Ground: warm parchment. Green is a refined accent, not a wash.
   ═══════════════════════════════════════════════════════════════════ */

:root {
  /* ── Brand greens ─────────────────────────────────────────── */
  --green-900: #1b5e20;
  --green-800: #2e7d32;
  --green-700: #388e3c;
  --green-600: #43a047;
  --green-500: #66bb6a;
  --green-400: #81c784;
  --green-300: #a5d6a7;
  --green-200: #c8e6c9;
  --green-100: #e8f5e9;
  --green-50:  #f3f9f3;

  /* ── Warm neutrals ────────────────────────────────────────── */
  --ink:       #11201a;
  --slate:     #3a4a40;
  --stone:     #6b7770;
  --mist:      #a8b1a8;
  --line:      #e7e2d4;
  --line-soft: #efece2;
  --parchment: #f6f3ec;
  --paper:     #fbfaf5;
  --surface:   #ffffff;

  /* ── Accent — warm clay (for "unusual" / counterpoint) ────── */
  --clay:        oklch(0.62 0.11 55);
  --clay-deep:   oklch(0.46 0.10 50);
  --clay-soft:   oklch(0.95 0.025 70);
  --clay-line:   oklch(0.86 0.05 62);

  /* ── Type ─────────────────────────────────────────────────── */
  --font-display: 'Newsreader', 'Iowan Old Style', 'Georgia', serif;
  --font-body:    'IBM Plex Sans', 'Segoe UI', Roboto, system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', 'SFMono-Regular', Menlo, monospace;

  --t-eyebrow: 11px;
  --t-meta:    13px;
  --t-body:    16px;
  --t-lead:    20px;
  --t-h3:      26px;
  --t-h2:      40px;
  --t-h1:      64px;

  --radius:    14px;
  --radius-sm: 9px;
  --radius-xs: 6px;
  --shadow:    0 1px 2px rgba(20,30,25,0.04), 0 8px 24px rgba(20,30,25,0.06);
  --shadow-lg: 0 2px 4px rgba(20,30,25,0.04), 0 24px 60px rgba(20,30,25,0.10);

  --content-w: 1200px;
  --reading-w: 760px;
  --pad-page:  64px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--parchment);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'ss01', 'cv11';
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--green-200); color: var(--green-900); }

/* ═══════════════════════════════════════════════════════════════════
   GLOBAL NAV — sticky, parchment blur, static dodecagon mark
   ═══════════════════════════════════════════════════════════════════ */
.topnav-wrap {
  position: sticky; top: 0; z-index: 60;
  background: rgba(246,243,236,0.86);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topnav {
  display: flex; justify-content: space-between; align-items: center;
  height: 64px;
  padding: 0 var(--pad-page); max-width: var(--content-w); margin: 0 auto;
  position: relative;
}
.topnav .brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-display);
  font-size: 19px; font-weight: 500; letter-spacing: -0.01em;
  color: var(--ink);
}
.topnav .brand svg { display: block; flex-shrink: 0; }
.topnav .brand strong { color: var(--green-700); font-weight: 500; }
.topnav nav { display: flex; gap: 28px; align-items: center; }
.topnav nav a {
  color: var(--slate);
  font-family: var(--font-body);
  font-size: 13.5px;
  transition: color .15s;
  position: relative;
  white-space: nowrap;
}
.topnav nav a:hover { color: var(--green-700); }
.topnav nav a.current { color: var(--green-800); }
.topnav nav > a.current::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -22px;
  height: 2px; background: var(--green-700);
}
.topnav .pill {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--green-800);
  background: var(--green-100);
  padding: 4px 10px; border-radius: 999px;
  letter-spacing: 0.05em;
}

/* ── Hover dropdown menus ─────────────────────────────────── */
.topnav nav .has-menu { position: relative; }
.topnav nav .has-menu > a { display: inline-flex; align-items: center; gap: 5px; }
.topnav nav .has-menu > a .chev {
  width: 9px; height: 9px; flex-shrink: 0;
  transition: transform .2s; color: var(--mist);
}
.topnav nav .has-menu:hover > a .chev,
.topnav nav .has-menu:focus-within > a .chev { transform: rotate(180deg); color: var(--green-700); }

.nav-menu {
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%);
  padding-top: 16px;            /* invisible hover bridge */
  opacity: 0; visibility: hidden;
  transition: opacity .18s ease, transform .18s ease;
  z-index: 70;
  transform: translateX(-50%) translateY(6px);
}
.has-menu:hover .nav-menu,
.has-menu:focus-within .nav-menu {
  opacity: 1; visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-menu .menu-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 12px;
}
.nav-menu .menu-head {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--stone);
  padding: 4px 10px 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.nav-menu .menu-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 10px; }
.nav-menu .menu-grid.single { grid-template-columns: 1fr; min-width: 240px; }
.nav-menu .menu-grid { min-width: 460px; }
.nav-menu a.menu-item {
  display: grid; grid-template-columns: 24px 1fr; gap: 9px; align-items: baseline;
  padding: 8px 10px; border-radius: var(--radius-sm);
  font-size: 13.5px; color: var(--slate); line-height: 1.3;
  transition: background .14s, color .14s;
}
.nav-menu a.menu-item .mi-num {
  font-family: var(--font-mono); font-size: 11px; color: var(--mist);
}
.nav-menu a.menu-item:hover { background: var(--green-50); color: var(--green-900); }
.nav-menu a.menu-item:hover .mi-num { color: var(--green-700); }
.nav-menu a.menu-item.current { background: var(--green-100); color: var(--green-900); }
.nav-menu a.menu-item.current .mi-num { color: var(--green-700); }
.nav-menu .menu-foot {
  margin-top: 8px; padding: 10px 10px 4px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em;
  color: var(--green-700);
}
.nav-menu a.menu-foot-link {
  text-decoration: none; text-transform: uppercase;
  transition: color .14s, gap .14s;
}
.nav-menu a.menu-foot-link .foot-arrow {
  width: 16px; height: 10px; transition: transform .16s ease;
}
.nav-menu a.menu-foot-link:hover { color: var(--green-900); }
.nav-menu a.menu-foot-link:hover .foot-arrow { transform: translateX(3px); }

/* ── Mobile hamburger ─────────────────────────────────────── */
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface); cursor: pointer;
  align-items: center; justify-content: center;
  color: var(--green-800);
}
.nav-toggle svg { width: 20px; height: 20px; }

/* Static logo lockup */
.dg-lockup { display: block; height: auto; }
.topnav .brand { gap: 0; }

/* Fix: no floating underline under nav items that own a dropdown */
.topnav nav .has-menu > a.current::after { display: none; }
/* Menu items: align wrapped lines to top, never underline */
.nav-menu a.menu-item { align-items: start; text-decoration: none; }
.nav-menu a.menu-item > span:last-child { text-wrap: pretty; }

/* ═══════════════════════════════════════════════════════════════════
   LAYOUT PRIMITIVES
   ═══════════════════════════════════════════════════════════════════ */
.wrap { max-width: var(--content-w); margin: 0 auto; padding: 0 var(--pad-page); }

/* Alpha disclaimer strip */
.alpha-strip {
  max-width: var(--content-w); margin: 24px auto 0; padding: 0 var(--pad-page);
}
.alpha-strip .inner {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  border-radius: var(--radius-sm);
  padding: 13px 20px;
  font-size: 13px;
  color: var(--slate);
  display: flex; align-items: center; gap: 14px;
}
.alpha-strip .tag {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--clay-deep);
  padding: 3px 9px; border: 1px solid var(--clay-line); border-radius: 999px;
  white-space: nowrap;
}

/* Breadcrumb */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--stone);
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  padding: 26px 0 0;
}
.breadcrumb a, .breadcrumb > span { white-space: nowrap; }
.breadcrumb a { color: var(--green-700); transition: color .15s; }
.breadcrumb a:hover { color: var(--green-900); }
.breadcrumb .sep { color: var(--mist); }

/* ═══════════════════════════════════════════════════════════════════
   GUIDE HEADER (principle pages)
   ═══════════════════════════════════════════════════════════════════ */
.guide-header { padding: 30px 0 40px; border-bottom: 1px solid var(--line); }
.guide-header .gh-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--t-eyebrow); letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--green-700);
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 20px;
}
.guide-header .gh-eyebrow .badge {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--green-800); background: var(--green-100);
  padding: 4px 10px; border-radius: 999px;
}
.guide-header h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--t-h1);
  line-height: 1.0;
  letter-spacing: -0.035em;
  color: var(--ink);
}
.guide-header h1 em { font-style: italic; color: var(--green-700); font-weight: 300; }
.guide-header h1 .h1-num {
  color: var(--green-300);
  font-weight: 300;
  font-style: normal;
  margin-right: 0.32em;
  letter-spacing: -0.02em;
}
.guide-header .gh-tagline {
  margin-top: 26px;
  font-size: var(--t-lead);
  line-height: 1.5;
  color: var(--slate);
  max-width: var(--reading-w);
  text-wrap: pretty;
}
.guide-header .gh-actions {
  display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
  margin-top: 34px;
}

/* Buttons */
.btn-solid, .btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body);
  font-size: 13.5px; font-weight: 500;
  border-radius: 999px;
  padding: 10px 18px;
  cursor: pointer;
  transition: background .18s, border-color .18s, color .18s, transform .18s;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-solid {
  background: var(--green-800); color: #fff;
}
.btn-solid:hover { background: var(--green-900); transform: translateY(-1px); }
.btn-ghost {
  background: transparent; color: var(--slate);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--green-300); color: var(--green-800); background: var(--paper); }
.btn-solid svg, .btn-ghost svg { flex-shrink: 0; }
.gh-actions .divider { width: 1px; height: 22px; background: var(--line); margin: 0 4px; }

/* ═══════════════════════════════════════════════════════════════════
   GUIDE BODY LAYOUT — sticky TOC + content column
   ═══════════════════════════════════════════════════════════════════ */
.guide-layout {
  display: grid;
  grid-template-columns: 232px 1fr;
  gap: 64px;
  padding: 48px 0 0;
  align-items: start;
}

/* Sticky table of contents (scroll-spy) */
.guide-toc {
  position: sticky; top: 96px;
  align-self: start;
}
.guide-toc .toc-label {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--stone);
  padding-bottom: 14px; margin-bottom: 6px;
  border-bottom: 1px solid var(--line);
}
.guide-toc ol { list-style: none; }
.guide-toc li { margin: 0; }
.guide-toc a {
  display: grid; grid-template-columns: 24px 1fr; gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  font-size: 13.5px;
  line-height: 1.35;
  color: var(--stone);
  border-left: 2px solid transparent;
  padding-left: 14px; margin-left: -16px;
  transition: color .15s, border-color .15s;
}
.guide-toc a .n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  transition: color .15s;
}
.guide-toc a:hover { color: var(--ink); }
.guide-toc a:hover .n { color: var(--green-700); }
.guide-toc a.active {
  color: var(--green-900); font-weight: 500;
  border-left-color: var(--green-700);
}
.guide-toc a.active .n { color: var(--green-700); }

.guide-content { min-width: 0; }

/* ═══════════════════════════════════════════════════════════════════
   COLLAPSIBLE SECTION CARDS
   ═══════════════════════════════════════════════════════════════════ */
.card.collapsible {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
  transition: box-shadow .2s, border-color .2s;
}
.card.collapsible.open { box-shadow: var(--shadow); }
.collapsible-header {
  display: grid; grid-template-columns: auto 1fr auto;
  gap: 18px; align-items: center;
  padding: 26px 30px;
  cursor: pointer;
  user-select: none;
}
.collapsible-header .sec-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green-700);
  letter-spacing: 0.04em;
  padding-top: 4px;
}
.collapsible-header h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--t-h3);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--ink);
  text-wrap: pretty;
}
.collapsible.open .collapsible-header h2 { color: var(--green-900); }
.toggle-btn {
  flex-shrink: 0;
  width: 34px; height: 34px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-size: 20px; line-height: 1;
  color: var(--green-700);
  background: var(--paper);
  transition: background .18s, border-color .18s, transform .2s;
}
.collapsible-header:hover .toggle-btn { border-color: var(--green-300); background: var(--green-50); }

.collapsible-content {
  max-height: 0;
  padding: 0 30px;
  overflow: hidden;
  opacity: 0;
  transition: max-height .35s ease, opacity .25s ease, padding .25s ease;
  will-change: max-height, opacity, padding;
}
.collapsible.open .collapsible-content {
  max-height: 40000px;
  padding: 4px 30px 32px;
  opacity: 1;
}

/* ═══════════════════════════════════════════════════════════════════
   SECTION BODY — reading typography
   ═══════════════════════════════════════════════════════════════════ */
.section-body { max-width: var(--reading-w); }
.section-body > *:first-child { margin-top: 0; }
.section-body p,
.section-body ul,
.section-body ol { margin: 0 0 16px; }
.section-body p { line-height: 1.68; color: var(--slate); }
.section-body p strong { color: var(--ink); font-weight: 600; }
.section-body ul, .section-body ol { padding-left: 22px; }
.section-body li { margin: 8px 0; line-height: 1.62; color: var(--slate); }
.section-body li strong { color: var(--ink); font-weight: 600; }
.section-body h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 21px;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 28px 0 10px;
  text-wrap: pretty;
}
.section-body .small { font-size: 13px; color: var(--stone); }

.section-body blockquote {
  margin: 18px 0;
  padding: 16px 22px;
  background: var(--paper);
  border-left: 3px solid var(--green-700);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-style: italic;
  line-height: 1.5;
  color: var(--green-900);
}

/* Inline hyperlinks */
.section-body a[href] {
  color: var(--green-800);
  text-decoration: underline;
  text-decoration-color: var(--green-300);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: text-decoration-color .15s, color .15s;
}
.section-body a[href]:hover { color: var(--green-900); text-decoration-color: var(--green-700); }

/* Inline code / pre */
.section-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--green-50);
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  padding: 2px 6px;
  color: var(--green-900);
}
.section-body pre {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green-700);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  overflow-x: auto;
  margin: 16px 0;
}
.section-body pre code {
  background: none; border: none; padding: 0;
  font-size: 14px; color: var(--green-900); line-height: 1.55;
}

/* ── KPI row ──────────────────────────────────────────────── */
.kpi { display: flex; gap: 14px; flex-wrap: wrap; margin: 18px 0 4px; }
.kpi .item {
  flex: 1 1 200px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--slate);
}
.kpi .item strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--green-700);
  margin-bottom: 8px;
  font-weight: 600;
}

/* ═══════════════════════════════════════════════════════════════════
   EXPANDABLE LISTS  (<details> for metrics / strategies / case studies)
   ═══════════════════════════════════════════════════════════════════ */
.expandable-list { display: flex; flex-direction: column; gap: 10px; margin: 16px 0 0; }
.expandable-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface);
  transition: border-color .18s;
}
.expandable-list details[open] { border-color: var(--green-300); }
.expandable-list summary {
  list-style: none;
  padding: 16px 20px;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.45;
  color: var(--ink);
  background: var(--paper);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  transition: background .15s, color .15s;
}
.expandable-list summary:hover { background: var(--green-50); color: var(--green-900); }
.expandable-list details[open] summary { color: var(--green-900); background: var(--green-50); }
.expandable-list summary::-webkit-details-marker { display: none; }
.expandable-list summary::after {
  content: '+';
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 22px; font-weight: 400; line-height: 1;
  color: var(--green-700);
  transition: transform .2s;
}
.expandable-list details[open] summary::after { content: '\2212'; }
.expandable-list .item-body {
  padding: 18px 20px 20px;
  border-top: 1px solid var(--line);
}
.expandable-list .item-body > *:first-child { margin-top: 0; }
.expandable-list .item-body > *:last-child { margin-bottom: 0; }
.expandable-list .item-body p { font-size: 15px; }

/* ── Case studies ─────────────────────────────────────────── */
/* ── Case studies ──────────────────────────── */
.case-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 14px; align-items: center; }
.case-tag {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.04em;
  padding: 4px 11px;
  border-radius: 999px;
  font-weight: 500;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--stone);
  transition: background .15s, border-color .15s, color .15s;
  cursor: pointer;
}
.case-tag::before { content: "#"; color: var(--mist); font-weight: 400; }
.case-tag:hover { border-color: var(--green-300); color: var(--green-900); background: var(--green-50); }
/* Type chips lead the row and carry colour */
.case-tag.type { text-transform: uppercase; letter-spacing: 0.08em; font-size: 10.5px; }
.case-tag.type::before { content: none; }
.case-tag.type-routine { background: var(--green-100); color: var(--green-900); border-color: var(--green-200); }
.case-tag.type-routine:hover { background: var(--green-200); }
.case-tag.type-unusual { background: var(--clay-soft); color: var(--clay-deep); border-color: var(--clay-line); }
.case-tag.type-unusual:hover { background: var(--clay-soft); border-color: var(--clay); }

.case-metric { display: flex; gap: 10px; flex-wrap: wrap; margin: 16px 0 0; }
.case-metric .m {
  flex: 1 1 150px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 14px;
  color: var(--ink);
  font-weight: 500;
}
.case-metric .m strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--green-700);
  margin-bottom: 5px;
  font-weight: 600;
}

/* ── Strengths / challenges two-column ────────────────────── */
.sl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
.sl-col h3 { margin-top: 0; }
.sl-col ul { padding-left: 0; list-style: none; }
.sl-col li {
  position: relative; padding-left: 22px;
  font-size: 15px;
}
.sl-col li::before {
  content: ""; position: absolute; left: 4px; top: 11px;
  width: 7px; height: 7px; border-radius: 50%;
}
.sl-col.strengths li::before { background: var(--green-600); }
.sl-col.challenges li::before { background: var(--clay); }

/* ═══════════════════════════════════════════════════════════════════
   MARKDOWN TABLES  (rendered by marked.js inside expandable items)
   ═══════════════════════════════════════════════════════════════════ */
.item-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 13.5px;
  overflow-x: auto;
  display: block;
}
.item-body table thead tr { background: var(--green-100); -webkit-print-color-adjust: exact; print-color-adjust: exact; }
.item-body table thead th {
  padding: 8px 13px;
  text-align: left;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--green-800);
  border-bottom: 1px solid var(--green-200);
  white-space: nowrap;
}
.item-body table tbody tr { border-bottom: 1px solid var(--line-soft); }
.item-body table tbody tr:nth-child(even) { background: var(--paper); }
.item-body table td {
  padding: 8px 13px;
  vertical-align: middle;
  line-height: 1.5;
  color: var(--slate);
}
.item-body table td:first-child { font-weight: 600; color: var(--green-900); white-space: nowrap; }
.item-body table .katex { font-size: 1em; }

/* ═══════════════════════════════════════════════════════════════════
   EQUATION BLOCKS  (KaTeX)
   ═══════════════════════════════════════════════════════════════════ */
.eq-block { margin: 18px 0; }
.eq-display {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green-700);
  border-radius: var(--radius-sm);
  padding: 16px 22px;
  overflow-x: auto;
  text-align: center;
}
.eq-display .katex-display { margin: 0; }
.eq-display .katex { font-size: 1.2em; color: var(--ink); }

.eq-terms {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 13.5px;
}
.eq-terms thead tr { background: var(--green-100); }
.eq-terms thead th {
  padding: 8px 13px;
  text-align: left;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--green-800);
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em;
  border-bottom: 1px solid var(--green-200);
}
.eq-terms tbody tr { border-bottom: 1px solid var(--line-soft); }
.eq-terms tbody tr:nth-child(even) { background: var(--paper); }
.eq-terms td {
  padding: 8px 13px;
  vertical-align: top;
  line-height: 1.5;
  color: var(--slate);
}
.eq-terms td:first-child {
  font-weight: 600; color: var(--green-900);
  white-space: nowrap; width: 1%;
}
.eq-terms .katex { font-size: 1em; }

/* ═══════════════════════════════════════════════════════════════════
   CHECKLIST  (localStorage-persisted)
   ═══════════════════════════════════════════════════════════════════ */
.cl-group {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 600;
  color: var(--green-700);
  text-transform: uppercase; letter-spacing: 0.1em;
  margin: 22px 0 4px;
}
.cl-group:first-child { margin-top: 0; }
.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li { margin: 4px 0; }
.checklist li:has(.cl-group) { margin: 0; }
.checklist label {
  display: grid;
  grid-template-columns: 1.3em auto;
  align-items: start;
  gap: 12px;
  cursor: pointer;
  padding: 7px 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--slate);
}
.checklist input[type="checkbox"] {
  position: absolute; opacity: 0; pointer-events: none;
}
.checklist .box {
  width: 20px; height: 20px;
  border: 2px solid var(--green-400);
  border-radius: var(--radius-xs);
  margin-top: 1px;
  display: inline-block;
  transition: background .15s, border-color .15s;
  position: relative;
}
.checklist input[type="checkbox"]:checked + .box {
  background: var(--green-700);
  border-color: var(--green-700);
}
.checklist input[type="checkbox"]:checked + .box::after {
  content: "\2713";
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-size: 13px; color: #fff; line-height: 1;
}
.checklist input[type="checkbox"]:focus-visible + .box {
  outline: 2px solid var(--green-700); outline-offset: 2px;
}
.checklist input[type="checkbox"]:checked ~ .txt {
  text-decoration: line-through;
  color: var(--mist);
}

/* Live-checklist affordance: row reacts on hover so its interactivity reads */
.checklist label {
  border-radius: var(--radius-sm);
  margin: 0 -10px; padding: 8px 10px;
  transition: background .15s;
}
.checklist label:hover { background: var(--green-50); color: var(--ink); }
.checklist label:hover .box {
  border-color: var(--green-700);
  background: var(--green-100);
  box-shadow: 0 0 0 4px rgba(56,142,60,0.10);
}
.checklist label:active .box { transform: scale(0.9); }
.checklist .box { transition: background .15s, border-color .15s, box-shadow .15s, transform .12s; }

.live-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.06em;
  color: var(--green-800);
  background: var(--green-50);
  border: 1px solid var(--green-200);
  padding: 6px 12px; border-radius: 999px;
  margin: 0 0 6px;
}
.live-badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green-600);
  box-shadow: 0 0 0 0 rgba(67,160,71,0.5);
  animation: livePulse 2s infinite;
}
@keyframes livePulse {
  0%   { box-shadow: 0 0 0 0 rgba(67,160,71,0.45); }
  70%  { box-shadow: 0 0 0 7px rgba(67,160,71,0); }
  100% { box-shadow: 0 0 0 0 rgba(67,160,71,0); }
}
@media (prefers-reduced-motion: reduce) { .live-badge .dot { animation: none; } }

/* ═══════════════════════════════════════════════════════════════════
   TLDR
   ═══════════════════════════════════════════════════════════════════ */
.tldr-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.tldr-list li {
  padding: 14px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green-700);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.6;
  font-size: 15px;
  color: var(--slate);
}
.tldr-list li strong { color: var(--green-900); font-weight: 600; }

/* ═══════════════════════════════════════════════════════════════════
   REFERENCES
   ═══════════════════════════════════════════════════════════════════ */
ol.ref-list { padding-left: 24px; }
ol.ref-list li {
  margin: 12px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--slate);
  padding-left: 6px;
}
ol.ref-list li::marker { color: var(--green-700); font-family: var(--font-mono); font-size: 12px; }
ol.ref-list em { color: var(--stone); font-style: italic; }

/* ═══════════════════════════════════════════════════════════════════
   CONTRIBUTORS  (Section 10)
   ═══════════════════════════════════════════════════════════════════ */
.contributors-list { display: flex; flex-direction: column; }
.contributor {
  display: grid; grid-template-columns: 1fr auto; gap: 4px 18px;
  padding: 18px 0; border-bottom: 1px solid var(--line); align-items: baseline;
}
.contributor:first-child { padding-top: 2px; }
.contributor:last-child { border-bottom: none; padding-bottom: 2px; }
.contributor .c-name {
  font-family: var(--font-display); font-size: 20px; font-weight: 400;
  letter-spacing: -0.01em; color: var(--ink);
}
.contributor .c-role {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em;
  color: var(--green-700); text-align: right; white-space: nowrap;
}
.contributor .c-detail { grid-column: 1 / -1; font-size: 14px; color: var(--stone); margin-top: 0; }

/* ── CRediT contributor matrix ───────────────────────────── */
.credit-matrix {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 18px;
}
.credit-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.credit-table { border-collapse: collapse; min-width: 100%; font-size: 13.5px; }
.credit-table thead th {
  background: var(--green-800); color: #fff;
  padding: 12px 12px 10px; text-align: center;
  font-family: var(--font-mono); font-weight: 500; font-size: 10.5px;
  letter-spacing: 0.04em; white-space: nowrap;
  position: sticky; top: 0; z-index: 2;
  cursor: default; user-select: none;
  transition: background .15s;
  -webkit-print-color-adjust: exact; print-color-adjust: exact;
}
.credit-table thead th:not(.name-col):hover { background: var(--green-900); }
.credit-table thead th.name-col {
  text-align: left; padding-left: 18px; min-width: 190px;
  position: sticky; left: 0; top: 0; z-index: 4; background: var(--green-800);
}
.credit-table tbody tr { transition: background .12s; }
.credit-table tbody tr:nth-child(even) { background: var(--paper); }
.credit-table tbody tr:hover { background: var(--green-50); }
.credit-table td {
  padding: 11px 12px; text-align: center;
  border-bottom: 1px solid var(--line-soft); vertical-align: middle;
}
.credit-table td.name-col {
  text-align: left; padding-left: 18px;
  font-family: var(--font-display); font-size: 17px; font-weight: 400;
  letter-spacing: -0.01em; white-space: nowrap;
  position: sticky; left: 0; z-index: 1;
  background: var(--surface); border-right: 1px solid var(--line); cursor: default;
}
.credit-table tbody tr:nth-child(even) td.name-col { background: var(--paper); }
.credit-table tbody tr:hover td.name-col { background: var(--green-50); }
.credit-table td.name-col .affil {
  display: block; font-family: var(--font-body); font-weight: 400;
  font-size: 12px; color: var(--stone); margin-top: 2px;
}
.credit-table td.icon-cell { line-height: 0; }

.credit-legend { display: flex; gap: 28px; flex-wrap: wrap; margin-top: 18px; }
.credit-legend-item { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.credit-legend-label strong { display: block; font-size: 13.5px; color: var(--ink); }
.credit-legend-label .desc { font-size: 12px; color: var(--stone); max-width: 190px; line-height: 1.4; margin-top: 2px; }

.credit-tip {
  display: none; position: fixed; z-index: 9999;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-lg);
  padding: 12px 16px; max-width: 300px; font-size: 13.5px; line-height: 1.55;
  pointer-events: none;
}
.credit-tip.visible { display: block; }
.credit-tip .t-name { font-family: var(--font-display); font-weight: 500; color: var(--green-900); font-size: 16px; }
.credit-tip .t-affil { font-size: 12px; color: var(--stone); margin-bottom: 7px; }
.credit-tip .t-sum { color: var(--slate); font-size: 13.5px; }
.credit-tip .t-role { font-family: var(--font-mono); font-weight: 500; color: var(--green-800); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 5px; }
.credit-tip .t-def { color: var(--slate); font-size: 13px; }
.credit-notice { font-size: 12px; color: var(--stone); margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); line-height: 1.6; }
.credit-ai-note { font-size: 11.5px; font-style: italic; color: var(--stone); margin-top: 14px; line-height: 1.65; }
.credit-notice strong { color: var(--slate); }

/* ═══════════════════════════════════════════════════════════════════
   CITATION  (Section 11)
   ═══════════════════════════════════════════════════════════════════ */
.citation-block {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green-700);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  position: relative;
  margin-top: 8px;
}
.citation-block + .citation-block { margin-top: 14px; }
.citation-block .cite-label {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--green-700); margin-bottom: 10px;
  display: block; padding-right: 90px;
}
.citation-block .cite-text {
  font-family: var(--font-mono);
  font-size: 13px; line-height: 1.7; color: var(--ink);
  word-break: break-word;
}
.cite-copy {
  position: absolute; top: 14px; right: 14px;
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em;
  color: var(--green-800); background: var(--surface);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 12px; cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}
.cite-copy:hover { background: var(--green-50); border-color: var(--green-300); }
.cite-copy.copied { background: var(--green-700); color: #fff; border-color: var(--green-700); }
.cite-copy svg { width: 13px; height: 13px; }

/* ═══════════════════════════════════════════════════════════════════
   PREV / NEXT PAGER
   ═══════════════════════════════════════════════════════════════════ */
.pager {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 20px;
  align-items: stretch;
  margin: 56px 0 0;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}
.pager .pg-link {
  display: flex; flex-direction: column; gap: 6px;
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color .2s, transform .2s, box-shadow .2s;
  min-width: 0;
}
.pager .pg-link:hover { border-color: var(--green-300); transform: translateY(-2px); box-shadow: var(--shadow); }
.pager .pg-link.next { text-align: right; }
.pager .pg-link.disabled { opacity: 0.4; pointer-events: none; }
.pager .pg-dir {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--stone);
}
.pager .pg-name {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 400; letter-spacing: -0.01em;
  color: var(--ink);
}
.pager .pg-link:hover .pg-name { color: var(--green-800); }
.pager .pg-all {
  display: grid; place-items: center; gap: 4px;
  padding: 0 22px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--green-700);
  text-align: center;
}
.pager .pg-all:hover { color: var(--green-900); }

/* ═══════════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════════ */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 76px 0 52px;
  margin-top: 88px;
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 52px;
}
.site-footer .brand-block .brand-name {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-display);
  font-size: 26px; font-weight: 400; letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.site-footer .brand-block .brand-name strong { color: var(--green-300); font-weight: 400; }
.site-footer .brand-block p {
  color: rgba(246,243,236,0.6);
  font-size: 13px; line-height: 1.65;
  max-width: 340px;
}
.site-footer .col h5 {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--green-300);
  margin-bottom: 16px;
}
.site-footer .col ul { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.site-footer .col a {
  color: rgba(246,243,236,0.78);
  font-size: 13.5px;
  transition: color .15s;
}
.site-footer .col a:hover { color: var(--paper); }
.site-footer .meta-bar {
  max-width: var(--content-w); margin: 52px auto 0; padding: 24px var(--pad-page) 0;
  border-top: 1px solid rgba(231,226,212,0.16);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.04em;
  color: rgba(246,243,236,0.5);
  flex-wrap: wrap; gap: 16px;
}

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════ */
@media (max-width: 1080px) {
  :root { --pad-page: 40px; --t-h1: 52px; --t-h2: 34px; }
  .guide-layout { grid-template-columns: 1fr; gap: 0; }
  .guide-toc {
    position: static;
    margin-bottom: 28px;
    border: 1px solid var(--line); border-radius: var(--radius);
    background: var(--surface); padding: 18px 22px;
  }
  .guide-toc ol { columns: 2; column-gap: 32px; }
  .site-footer .wrap { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .topnav nav {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    padding: 6px var(--pad-page) 16px;
    display: none;
  }
  .topnav.nav-open nav { display: flex; }
  .topnav nav > a,
  .topnav nav .has-menu > a {
    padding: 13px 2px; font-size: 15px;
    border-bottom: 1px solid var(--line-soft);
  }
  .topnav nav .current::after { display: none; }
  .topnav nav .has-menu { position: static; }
  .topnav nav .has-menu > a .chev { margin-left: auto; }
  .nav-menu {
    position: static; transform: none; opacity: 1; visibility: visible;
    padding-top: 0; max-height: 0; overflow: hidden;
    transition: max-height .3s ease;
  }
  .has-menu.expanded .nav-menu { max-height: 1600px; }
  .nav-menu .menu-card { box-shadow: none; border: none; border-radius: 0; padding: 6px 0 10px 10px; }
  .nav-menu .menu-head { display: none; }
  .nav-menu .menu-grid,
  .nav-menu .menu-grid.single { grid-template-columns: 1fr; min-width: 0; }
  .nav-menu .menu-foot { padding-left: 0; }
}

@media (max-width: 720px) {
  :root { --pad-page: 22px; --t-h1: 40px; --t-h3: 22px; }
  .collapsible-header { padding: 20px; grid-template-columns: auto 1fr auto; gap: 12px; }
  .collapsible.open .collapsible-content { padding: 4px 20px 24px; }
  .collapsible-content { padding: 0 20px; }
  .sl-grid { grid-template-columns: 1fr; gap: 8px; }
  .guide-toc ol { columns: 1; }
  .pager { grid-template-columns: 1fr; }
  .pager .pg-all { padding: 12px; }
  .pager .pg-link.next { text-align: left; }
  .contributor { grid-template-columns: 1fr; }
  .contributor .c-role { text-align: left; }
  .cite-copy { position: static; margin-bottom: 10px; }
  .citation-block .cite-label { padding-right: 0; }
  .site-footer .wrap { grid-template-columns: 1fr; gap: 36px; }
}

/* ═══════════════════════════════════════════════════════════════════
   PRINT / PDF  — brand-upgraded: white ground, serif heads, dodecagon footer
   ═══════════════════════════════════════════════════════════════════ */
#print-page-header { display: none; }
#print-header { display: none; }

@page {
  size: A4;
  margin: 18mm 16mm 24mm 16mm;
}

@media print {
  /* ── Hide all screen-only chrome ─────────────────────────── */
  .topnav-wrap, .alpha-strip, .breadcrumb, .gh-actions,
  .pager, .site-footer, .toggle-btn,
  .cite-copy, .live-badge,
  #credit-name-tip, #credit-role-tip { display: none !important; }

  html, body {
    background: #fff !important;
    color: var(--ink);
    font-size: 10.25pt;
    line-height: 1.5;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .wrap { max-width: 100%; padding: 0; }
  .guide-layout { display: block; padding: 0; }
  .guide-content { max-width: 100%; }
  p, li { orphans: 2; widows: 2; }

  /* ── Running brand footer on every printed page ──────────── */
  #print-page-header {
    display: flex !important;
    position: fixed; bottom: 0; left: 0; right: 0;
    height: 17pt;
    background: var(--green-800) !important;
    color: #fff !important;
    align-items: center; justify-content: space-between;
    padding: 0 14pt;
    font-family: var(--font-mono);
    font-size: 7.5pt; letter-spacing: 0.04em;
    z-index: 9999;
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }
  #print-page-header .pph-left { display: flex; align-items: center; gap: 9pt; }
  #print-page-header .pph-logo {
    font-family: var(--font-display);
    font-size: 9.5pt; font-weight: 600; letter-spacing: 0; color: #fff !important;
  }
  #print-page-header .pph-sep { width: 1pt; height: 10pt; background: rgba(255,255,255,0.4) !important; }
  #print-page-header .pph-title { color: rgba(255,255,255,0.92) !important; }
  #print-page-header .pph-right { color: rgba(255,255,255,0.7) !important; font-size: 7pt; }

  /* ══ COVER (page 1) — masthead + contents ════════════════ */
  .guide-header { display: none !important; }
  #print-header {
    display: block !important;
    padding: 8pt 0 0;
    margin: 0 0 4pt;
  }
  #print-header .ph-label {
    font-family: var(--font-mono);
    font-size: 8pt; font-weight: 600; text-transform: uppercase; letter-spacing: 0.18em;
    color: var(--green-700);
    margin-bottom: 16pt; padding-bottom: 10pt;
    border-bottom: 0.75pt solid var(--green-200);
  }
  #print-header h1 {
    font-family: var(--font-display); font-weight: 300;
    font-size: 31pt; line-height: 1.04; letter-spacing: -0.02em;
    color: var(--ink); margin: 0 0 12pt; max-width: 22ch;
  }
  #print-header .ph-sub {
    font-family: var(--font-display); font-style: italic;
    font-size: 12.5pt; line-height: 1.45; color: var(--green-900);
    max-width: 78%; padding-left: 13pt;
    border-left: 2.5pt solid var(--green-700);
  }

  /* Printed contents — reuse the on-page TOC */
  .guide-toc {
    display: block !important;
    position: static !important;
    width: 100%; margin: 26pt 0 0; padding: 0;
    border: none !important; border-radius: 0 !important;
    background: transparent !important; box-shadow: none !important;
    page-break-after: always;
  }
  .guide-toc .toc-label { display: none !important; }
  .guide-toc::before {
    content: "Contents";
    display: block;
    font-family: var(--font-mono);
    font-size: 8pt; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--green-700);
    padding-bottom: 9pt; margin-bottom: 13pt;
    border-bottom: 0.5pt solid var(--green-200);
  }
  .guide-toc ol {
    list-style: none; margin: 0; padding: 0;
    columns: 2; column-gap: 44pt;
  }
  .guide-toc li { margin: 0 0 10pt; padding: 0; break-inside: avoid; }
  .guide-toc a {
    display: block;
    color: var(--ink) !important;
    border: none !important; padding: 0 !important; margin: 0 !important;
    font-family: var(--font-body); font-size: 10.5pt; line-height: 1.3;
    transition: none !important;
  }
  .guide-toc a .n {
    font-family: var(--font-mono); font-size: 8.5pt; font-weight: 600;
    color: var(--green-700) !important;
    display: inline-block; min-width: 20pt; margin-right: 4pt;
  }

  /* ══ SECTIONS ════════════════════════════════════════════ */
  .card.collapsible {
    box-shadow: none !important; border: none !important; border-radius: 0 !important;
    background: transparent !important;
    margin: 0 0 15pt !important; padding: 0 !important;
    page-break-inside: auto;
    page-break-before: always; break-before: page;
  }
  /* First section flows right after the contents page break, not an extra blank page */
  .guide-content > .card.collapsible:first-of-type {
    page-break-before: avoid; break-before: avoid;
  }
  .collapsible-header {
    display: block !important;
    padding: 0 0 7pt !important; margin-bottom: 9pt;
    border-bottom: 0.5pt solid var(--green-200);
    page-break-after: avoid; break-after: avoid;
  }
  .collapsible-header .sec-num {
    font-family: var(--font-mono); font-size: 8pt; font-weight: 600;
    letter-spacing: 0.1em; color: var(--green-700);
    display: block; margin: 0 0 4pt; padding: 0;
  }
  .collapsible-header h2 {
    font-family: var(--font-display); font-weight: 400;
    font-size: 15.5pt; line-height: 1.14; letter-spacing: -0.01em;
    color: var(--green-900); display: block;
  }
  .collapsible-content {
    display: block !important; max-height: none !important;
    overflow: visible !important; opacity: 1 !important; padding: 0 !important;
    transition: none !important; will-change: auto !important;
  }
  .section-body { max-width: 100%; }
  .section-body p { margin: 0 0 7pt; }
  .section-body li { margin: 0 0 6pt; line-height: 1.5; }
  .section-body ul, .section-body ol { padding-left: 16pt; }
  .section-body h3 {
    font-size: 11.5pt; margin: 13pt 0 5pt;
    page-break-after: avoid; break-after: avoid;
  }

  /* Expandable lists */
  .expandable-list { gap: 0; margin: 8pt 0 0; }
  .expandable-list details {
    border: 0.5pt solid var(--green-200) !important;
    border-radius: var(--radius-xs) !important;
    margin: 0 0 6pt; overflow: hidden;
    page-break-inside: avoid;
  }
  .expandable-list details summary {
    background: var(--green-50) !important; padding: 5pt 9pt !important;
    font-family: var(--font-body); font-weight: 600;
    font-size: 10pt; color: var(--green-900);
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }
  .expandable-list summary::after,
  .expandable-list summary::-webkit-details-marker { display: none !important; }
  .expandable-list .item-body { display: block !important; padding: 8pt 9pt 10pt !important; }

  /* Metric / KPI cards — keep each group intact */
  .kpi, .case-metric { page-break-inside: avoid; gap: 7pt; }
  .kpi .item, .case-metric .m {
    border: 0.5pt solid var(--green-200) !important;
    border-radius: var(--radius-xs) !important;
    background: var(--paper) !important;
    padding: 7pt 9pt !important; font-size: 9pt;
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }

  /* Equations and KaTeX */
  .eq-block { page-break-inside: avoid; }
  .eq-display {
    border: 0.5pt solid var(--green-200) !important;
    border-left: 2pt solid var(--green-700) !important;
    border-radius: var(--radius-xs) !important;
    background: var(--paper) !important;
    overflow: visible !important;
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }
  .eq-terms { font-size: 8.5pt; }
  .eq-terms thead tr {
    background: var(--green-100) !important;
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }
  /* KaTeX display math must not be clipped in print */
  .katex-display { overflow: visible !important; }
  .katex-display > .katex { overflow: visible !important; }
  /* Expandable items: allow KaTeX and tables to overflow freely */
  .expandable-list details { overflow: visible !important; }
  .expandable-list .item-body { overflow: visible !important; }
  /* Markdown tables inside expandable content */
  .item-body table {
    display: table !important;
    width: 100% !important;
    overflow: visible !important;
    font-size: 8.5pt;
    page-break-inside: avoid;
  }
  .item-body table thead tr {
    background: var(--green-100) !important;
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }
  .item-body table td, .item-body table th {
    padding: 5pt 8pt !important;
    white-space: normal;
    word-break: break-word;
  }

  /* Key takeaways */
  .tldr-list { gap: 6pt; }
  .tldr-list li {
    border: 0.5pt solid var(--green-200) !important;
    border-left: 2pt solid var(--green-700) !important;
    border-radius: var(--radius-xs) !important;
    background: var(--paper) !important;
    padding: 7pt 9pt !important; page-break-inside: avoid;
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }

  /* Strengths / challenges */
  .sl-grid, .sl-col { page-break-inside: avoid; }
  .sl-col li { page-break-inside: avoid; }
  .sl-col h3 { page-break-after: avoid; break-after: avoid; }

  /* Checklist */
  .checklist .box { border: 1pt solid var(--stone) !important; width: 10pt; height: 10pt; }
  .checklist label { padding: 2pt 0; font-size: 9.5pt; }
  .checklist .cl-group { page-break-after: avoid; break-after: avoid; }
  .checklist li { page-break-inside: avoid; }

  /* Case tags */
  .case-tag { -webkit-print-color-adjust: exact; print-color-adjust: exact; }

  /* References */
  ol.ref-list li { font-size: 9pt; margin: 5pt 0; page-break-inside: avoid; }

  /* Contributors + citation */
  .credit-matrix { overflow: hidden !important; }
  .credit-scroll { overflow: visible !important; }
  .credit-table {
    width: 100% !important; min-width: 0 !important;
    table-layout: fixed; font-size: 7.5pt;
  }
  .credit-table thead th {
    padding: 5pt 1pt !important; font-size: 7pt; line-height: 1.15;
    word-break: break-word; hyphens: auto;
  }
  .credit-table thead th.name-col {
    min-width: 0 !important; width: 22%;
    position: static !important; padding-left: 6pt !important;
  }
  .credit-table td { padding: 5pt 1pt !important; }
  .credit-table td.name-col {
    position: static !important; padding-left: 6pt !important;
    font-size: 9pt !important; line-height: 1.2;
  }
  .credit-table td.name-col .affil { font-size: 6.5pt; }
  .credit-table td.icon-cell svg { width: 15pt !important; height: 15pt !important; }
  .credit-legend { display: block; margin-top: 12pt; }
  .credit-legend-item {
    display: block; overflow: hidden; margin: 0 0 9pt; font-size: 8.5pt;
  }
  .credit-legend-item svg { float: left; width: 16pt; height: 16pt; margin: 1pt 8pt 0 0; }
  .credit-legend-label strong { font-size: 9pt; }
  .credit-legend-label .desc { max-width: none; font-size: 8pt; line-height: 1.35; }
  .credit-notice { font-size: 8pt; margin-top: 14pt; padding-top: 10pt; border-top: 0.5pt solid var(--line); clear: both; }
  .credit-matrix, .credit-legend, .citation-block { page-break-inside: avoid; }

  blockquote { page-break-inside: avoid; }
}