/* ==========================================================================
   pnhdisease.org — "The Rare Hematology Lab-to-Life Atlas & Complement Navigator"
   Self-hosted Lora + Figtree + Red Hat Mono · Bone-Marrow Ivory · Zero SaaS Slop
   ========================================================================== */

@font-face {
  font-family: 'Lora';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/fonts/lora-latin-600.woff2') format('woff2');
}

@font-face {
  font-family: 'Lora';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('/fonts/lora-latin-400i.woff2') format('woff2');
}

@font-face {
  font-family: 'Figtree';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/fonts/figtree-latin-400.woff2') format('woff2');
}

@font-face {
  font-family: 'Figtree';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('/fonts/figtree-latin-500.woff2') format('woff2');
}

@font-face {
  font-family: 'Figtree';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/fonts/figtree-latin-600.woff2') format('woff2');
}

@font-face {
  font-family: 'Red Hat Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/fonts/redhatmono-latin-400.woff2') format('woff2');
}

@font-face {
  font-family: 'Red Hat Mono';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/fonts/redhatmono-latin-600.woff2') format('woff2');
}

:root {
  --bg-ivory: #FBF9F5;
  --bg-elevated: #FFFFFF;
  --bg-recessed: #F3EFE6;
  --bg-plum: #1C161E;
  --bg-plum-soft: #2B222E;

  --ink-primary: #1C161E;
  --ink-secondary: #4A3E4D;
  --ink-muted: #6E6073;
  --ink-on-plum: #FAF7F2;

  --signal-crimson: #9E2A3B;
  --signal-crimson-hover: #7A1C2A;
  --signal-crimson-soft: #FCEEEF;
  --accent-amber: #C87D20;
  --accent-amber-soft: #FEF6E7;

  --pathway-c5-bg: #FCEEEF;
  --pathway-c5-ink: #7A1C2A;
  --pathway-c5-border: #F5B8C0;

  --pathway-c3-bg: #FEF3C7;
  --pathway-c3-ink: #78350F;
  --pathway-c3-border: #FCD34D;

  --pathway-fb-bg: #DCFCE7;
  --pathway-fb-ink: #14532D;
  --pathway-fb-border: #86EFAC;

  --pathway-fd-bg: #E0E7FF;
  --pathway-fd-ink: #1E3A8A;
  --pathway-fd-border: #A5B4FC;

  --pathway-hsct-bg: #F3F4F6;
  --pathway-hsct-ink: #374151;
  --pathway-hsct-border: #D1D5DB;

  --rule-hairline: #DED6C8;
  --rule-strong: #1C161E;

  --font-display: 'Lora', 'Georgia', 'Songti SC', 'SimSun', serif;
  --font-sans: 'Figtree', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Red Hat Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container-max: 1200px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--bg-ivory);
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 1.03rem;
  line-height: 1.68;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

html[lang^="zh"] body {
  line-height: 1.82;
  letter-spacing: 0.01em;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  background: var(--bg-plum);
  color: #FFFFFF;
  padding: 0.65rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  border: 2px solid var(--signal-crimson);
}

.skip-link:focus {
  top: 0.75rem;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.15rem, 3.8vw, 2.5rem);
}

/* Top Provenance & Emergency Redline Band */
.disclaimer-band {
  background-color: var(--bg-plum);
  color: #E2D9E6;
  font-size: 0.78rem;
  line-height: 1.45;
  padding: 0.5rem 0;
  border-bottom: 1px solid #35293A;
}

.disclaimer-band .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1.25rem;
}

.disclaimer-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #F8B4BF;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* Masthead & Sticky Clinical Navigation */
.site-header {
  background-color: var(--bg-ivory);
  border-bottom: 2px solid var(--rule-strong);
  position: sticky;
  top: 0;
  z-index: 200;
}

.masthead-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding-block: 0.85rem;
  gap: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--rule-hairline);
}

.brand-link {
  text-decoration: none;
  color: var(--ink-primary);
  display: flex;
  flex-direction: column;
  gap: 0.14rem;
}

.brand-title {
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 2.1vw, 1.58rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ink-primary);
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.edition-pill {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  background: var(--bg-recessed);
  border: 1px solid var(--rule-hairline);
  padding: 0.25rem 0.65rem;
  color: var(--ink-secondary);
}

/* Language Switcher */
.lang-switch {
  position: relative;
}

.lang-switch details {
  position: relative;
}

.lang-switch summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  padding: 0.35rem 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 36px;
}

.lang-switch summary::-webkit-details-marker {
  display: none;
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  background: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  box-shadow: 0 8px 20px rgba(28, 22, 30, 0.14);
  min-width: 155px;
  z-index: 300;
  display: flex;
  flex-direction: column;
}

.lang-menu a {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--ink-primary);
  text-decoration: none;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--rule-hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.lang-menu a:last-child {
  border-bottom: none;
}

.lang-menu a:hover,
.lang-menu a.active {
  background: var(--signal-crimson-soft);
  color: var(--signal-crimson);
  font-weight: 600;
}

/* Primary Nav Bar */
.primary-nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  overflow-x: auto;
  scrollbar-width: none;
  padding-block: 0.35rem;
}

.primary-nav::-webkit-scrollbar {
  display: none;
}

.primary-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-secondary);
  text-decoration: none;
  padding: 0.42rem 0.68rem;
  white-space: nowrap;
  border-radius: 2px;
  transition: background-color 140ms ease, color 140ms ease;
}

.primary-nav a:hover {
  color: var(--ink-primary);
  background-color: var(--bg-recessed);
}

.primary-nav a[aria-current="page"] {
  color: var(--signal-crimson);
  background-color: var(--signal-crimson-soft);
  font-weight: 600;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--ink-primary);
  margin-top: 0;
  text-wrap: balance;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.3vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin-bottom: 1rem;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.42rem, 2.2vw, 1.9rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 600;
  margin-bottom: 0.85rem;
}

h3 {
  font-family: var(--font-sans);
  font-size: 1.16rem;
  line-height: 1.34;
  font-weight: 600;
  margin-bottom: 0.55rem;
}

p {
  margin-top: 0;
  margin-bottom: 1.1rem;
  max-width: 70ch;
}

a {
  color: var(--signal-crimson);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--signal-crimson-hover);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.small {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--ink-muted);
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--signal-crimson);
  margin-bottom: 0.55rem;
  display: inline-block;
}

/* Breadcrumb & Page Meta Header */
.page-meta-bar {
  padding-block: 0.82rem;
  border-bottom: 1px solid var(--rule-hairline);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb a {
  color: var(--ink-secondary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* Complement Pathway Badges */
.pathway-badge, .grade-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 600;
  padding: 0.18rem 0.54rem;
  border-radius: 2px;
  letter-spacing: 0.03em;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.pathway-c5, .grade-a {
  background-color: var(--pathway-c5-bg);
  color: var(--pathway-c5-ink);
  border: 1px solid var(--pathway-c5-border);
}

.pathway-c3, .grade-b {
  background-color: var(--pathway-c3-bg);
  color: var(--pathway-c3-ink);
  border: 1px solid var(--pathway-c3-border);
}

.pathway-fb, .grade-c {
  background-color: var(--pathway-fb-bg);
  color: var(--pathway-fb-ink);
  border: 1px solid var(--pathway-fb-border);
}

.pathway-fd, .grade-d {
  background-color: var(--pathway-fd-bg);
  color: var(--pathway-fd-ink);
  border: 1px solid var(--pathway-fd-border);
}

.pathway-hsct, .grade-i {
  background-color: var(--pathway-hsct-bg);
  color: var(--pathway-hsct-ink);
  border: 1px solid var(--pathway-hsct-border);
}

/* Answer Box Capsule (GEO & Clinical Takeaway — Zero links inside!) */
.answer-box {
  background-color: var(--bg-elevated);
  border-top: 2px solid var(--rule-strong);
  border-left: 4px solid var(--signal-crimson);
  border-right: 1px solid var(--rule-hairline);
  border-bottom: 1px solid var(--rule-hairline);
  padding: 1.25rem 1.5rem;
  margin-block: 1.5rem;
}

.answer-box-label {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--signal-crimson);
  margin-bottom: 0.4rem;
  display: block;
}

.answer-box p {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.64;
  color: var(--ink-primary);
  max-width: 75ch;
}

/* Section Cadence */
.section {
  padding-block: clamp(2.6rem, 5vw, 4.25rem);
  border-bottom: 1px solid var(--rule-hairline);
}

.section-alt {
  background-color: var(--bg-recessed);
}

.section-header {
  margin-bottom: 1.85rem;
  max-width: 780px;
}

/* Hero Asymmetric 7:5 Clinical Briefing */
.hero-briefing {
  padding-block: clamp(2.2rem, 4.5vw, 3.6rem);
  border-bottom: 2px solid var(--rule-strong);
}

.hero-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: clamp(1.75rem, 3.5vw, 3rem);
  align-items: start;
}

.provenance-note {
  background-color: var(--bg-recessed);
  border: 1px solid var(--rule-hairline);
  border-left: 3px solid var(--ink-primary);
  padding: 0.85rem 1.1rem;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink-secondary);
  margin-top: 1.25rem;
}

.provenance-note strong {
  color: var(--ink-primary);
}

/* Plate Figure */
.clinical-figure {
  margin: 0;
  background-color: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  padding: 0.75rem;
}

.clinical-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--rule-hairline);
}

.clinical-figure figcaption {
  padding-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.48;
  color: var(--ink-secondary);
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Signature Device 1: Interactive 60-Second Flow Cytometry Clone Decoder */
.flow-clone-decoder, .age-concordance-dial {
  background-color: var(--bg-elevated);
  border: 2px solid var(--rule-strong);
  margin-top: 1.5rem;
}

.decoder-header, .dial-header {
  background-color: var(--bg-plum);
  color: var(--ink-on-plum);
  padding: 0.9rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.decoder-title, .dial-title {
  font-family: var(--font-mono);
  font-size: 0.83rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
  color: #FFFFFF;
}

.clone-tabs, .dial-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--rule-strong);
  background-color: var(--bg-recessed);
}

.clone-tab, .dial-tab {
  appearance: none;
  background: transparent;
  border: none;
  border-right: 1px solid var(--rule-hairline);
  padding: 0.75rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.81rem;
  font-weight: 600;
  color: var(--ink-secondary);
  cursor: pointer;
  text-align: center;
  min-height: 48px;
  transition: background-color 140ms ease, color 140ms ease;
}

.clone-tab:last-child, .dial-tab:last-child {
  border-right: none;
}

.clone-tab:hover, .dial-tab:hover {
  background-color: #E7E0D3;
  color: var(--ink-primary);
}

.clone-tab[aria-selected="true"], .dial-tab[aria-selected="true"] {
  background-color: var(--signal-crimson);
  color: #FFFFFF;
}

.clone-panel, .dial-panel {
  padding: 1.35rem 1.5rem;
  animation: fadeInClonePanel 160ms ease-out;
}

.clone-panel[hidden], .dial-panel[hidden] {
  display: none;
}

@keyframes fadeInClonePanel {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

.clone-band-summary, .dial-band-summary {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--rule-hairline);
}

.clone-band-summary h3, .dial-band-summary h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.28rem;
}

/* Signature Device 2: Hemolysis & Complement Outcome Tracker */
.hemolysis-scale, .fact-scale-1000 {
  background-color: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  border-top: 3px solid var(--bg-plum);
  padding: 1.4rem 1.5rem;
  margin-block: 1.5rem;
}

.fact-scale-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem 1rem;
  border-bottom: 1px solid var(--rule-hairline);
  padding-bottom: 0.75rem;
  margin-bottom: 1.1rem;
}

.fact-scale-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.fact-scale-denom {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--signal-crimson);
  background: var(--signal-crimson-soft);
  padding: 0.2rem 0.55rem;
}

.fact-scale-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.fact-metric {
  border-left: 3px solid var(--rule-strong);
  padding-left: 0.85rem;
}

.fact-metric.benefit {
  border-left-color: #15803D;
}

.fact-metric.false-alarm {
  border-left-color: var(--accent-amber);
}

.fact-metric.overdx {
  border-left-color: var(--signal-crimson);
}

.fact-num {
  font-family: var(--font-mono);
  font-size: 1.52rem;
  font-weight: 600;
  line-height: 1.15;
  color: var(--ink-primary);
  font-variant-numeric: tabular-nums;
}

.fact-label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-primary);
  margin-top: 0.2rem;
}

.fact-sub {
  font-size: 0.79rem;
  color: var(--ink-muted);
  margin-top: 0.15rem;
  line-height: 1.4;
}

.fact-bar-track {
  margin-top: 1.15rem;
  height: 14px;
  background-color: var(--bg-recessed);
  border: 1px solid var(--rule-hairline);
  display: flex;
  overflow: hidden;
}

.fact-bar-seg {
  height: 100%;
  transition: width 220ms ease-out;
}

.seg-unharmed { background-color: #CBD5E1; }
.seg-falsepos { background-color: #D97706; }
.seg-biopsy { background-color: #9E2A3B; }
.seg-saved { background-color: #15803D; }

.fact-bar-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.35rem;
  margin-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-secondary);
}

.legend-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 0.35rem;
  vertical-align: middle;
}

/* Clinical Tables (Pitfall 94 Compliant) */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-top: 2px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
  background-color: var(--bg-elevated);
  margin-block: 1.25rem;
}

.concordance-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.91rem;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
  min-width: 640px;
}

.concordance-table caption {
  text-align: left;
  padding: 0.85rem 1rem;
  background-color: var(--bg-recessed);
  border-bottom: 1px solid var(--rule-strong);
  font-family: var(--font-mono);
  font-size: 0.79rem;
  font-weight: 600;
  color: var(--ink-primary);
}

.concordance-table th {
  background-color: var(--bg-plum);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: left;
  padding: 0.75rem 0.95rem;
}

.concordance-table td {
  padding: 0.85rem 0.95rem;
  border-bottom: 1px solid var(--rule-hairline);
  vertical-align: top;
  color: var(--ink-primary);
}

.concordance-table tbody tr:last-child td {
  border-bottom: 0;
}

.concordance-table tbody tr:nth-child(even) {
  background-color: #FCFBF9;
}

.concordance-table tbody tr:hover {
  background-color: var(--signal-crimson-soft);
}

/* Asymmetric Editorial Split Layout (8:4) */
.editorial-split {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: clamp(1.75rem, 3.5vw, 3rem);
  align-items: start;
}

.editorial-prose {
  max-width: 72ch;
}

.editorial-rail {
  background-color: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  padding: 1.25rem 1.35rem;
}

.editorial-rail h3 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--rule-hairline);
  padding-bottom: 0.55rem;
  margin-bottom: 0.85rem;
}

.rail-list {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.89rem;
  line-height: 1.58;
  color: var(--ink-secondary);
}

.rail-list li {
  margin-bottom: 0.6rem;
}

/* Emergency Triage & REMS Meningococcal Safety Callout */
.er-triage-card, .billing-trap-callout {
  background-color: var(--accent-amber-soft);
  border: 1px solid var(--accent-amber);
  border-left: 5px solid var(--signal-crimson);
  padding: 1.25rem 1.4rem;
  margin-block: 1.5rem;
}

.er-triage-title, .billing-trap-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--signal-crimson);
  margin-bottom: 0.45rem;
  display: block;
}

.er-triage-card p, .billing-trap-callout p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-primary);
  max-width: 74ch;
}

/* Two-Column Hematology Dossier Grid */
.dossier-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.dossier-sheet {
  background-color: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  padding: 1.4rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.dossier-sheet-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  border-bottom: 1px solid var(--rule-hairline);
  padding-bottom: 0.75rem;
  margin-bottom: 0.9rem;
}

.dossier-sheet h3 {
  font-family: var(--font-display);
  font-size: 1.28rem;
  margin: 0;
}

.dossier-kv {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.4rem 0.9rem;
  font-size: 0.88rem;
  margin-block: 0.85rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--rule-hairline);
}

.dossier-kv dt {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
  text-transform: uppercase;
}

.dossier-kv dd {
  margin: 0;
  color: var(--ink-primary);
  font-weight: 500;
}

.dossier-link {
  font-family: var(--font-mono);
  font-size: 0.81rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--signal-crimson);
  padding-top: 0.75rem;
  border-top: 1px solid var(--rule-hairline);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.dossier-link:hover {
  text-decoration: underline;
}

/* Interactive PNH Lab & LDH Multiple Calculator */
.calc-box {
  background-color: var(--bg-elevated);
  border: 2px solid var(--rule-strong);
  padding: 1.5rem;
  margin-block: 1.5rem;
}

.calc-controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.15rem;
  margin-block: 1.1rem;
}

.calc-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.77rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--ink-secondary);
}

.calc-field input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  border: 1px solid var(--rule-strong);
  background: var(--bg-ivory);
  color: var(--ink-primary);
}

.calc-output {
  background-color: var(--bg-recessed);
  border-left: 4px solid var(--signal-crimson);
  padding: 1rem 1.2rem;
  font-size: 0.94rem;
}

/* SVG Apparatus Container */
.svg-apparatus {
  background-color: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  padding: 1.25rem;
  margin-block: 1.5rem;
}

.svg-apparatus svg {
  display: block;
  width: 100%;
  height: auto;
}

.svg-apparatus figcaption {
  margin-top: 0.75rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--rule-hairline);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-secondary);
}

/* FAQ Section (GEO-compliant structure) */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-elevated);
  border: 1px solid var(--rule-strong);
  padding: 1.25rem 1.45rem;
}

.faq-q {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 600;
  margin: 0 0 0.6rem 0;
  color: var(--ink-primary);
}

.faq-a {
  font-size: 0.97rem;
  line-height: 1.65;
  color: var(--ink-secondary);
  margin: 0;
}

.faq-a p {
  margin: 0;
  max-width: 75ch;
}

.faq-src {
  margin: 0.65rem 0 0 0;
  padding-top: 0.55rem;
  border-top: 1px dashed var(--rule-hairline);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}

/* Footer (Pitfall 32: p.foot-h instead of h4 so footer doesn't pollute heading outline) */
.site-footer {
  background-color: var(--bg-plum);
  color: #DFD6E3;
  padding-block: 3rem 2.5rem;
  border-top: 3px solid var(--signal-crimson);
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #35293A;
}

.footer-title {
  font-family: var(--font-display);
  font-size: 1.22rem;
  color: #FFFFFF;
  margin-bottom: 0.65rem;
}

.foot-h {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #F8B4BF;
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-links a {
  color: #DFD6E3;
  text-decoration: none;
  font-size: 0.86rem;
}

.footer-links a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.79rem;
  color: #A899B0;
}

/* Responsive Breakpoints */
@media (max-width: 960px) {
  .hero-grid,
  .editorial-split {
    grid-template-columns: 1fr;
  }

  .fact-scale-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .dossier-grid-2 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .clone-tabs,
  .dial-tabs {
    grid-template-columns: repeat(2, 1fr);
  }

  .clone-tab,
  .dial-tab {
    border-bottom: 1px solid var(--rule-hairline);
  }

  .fact-scale-grid,
  .calc-controls,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .masthead-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .answer-box,
  .hemolysis-scale,
  .fact-scale-1000,
  .clone-panel,
  .dial-panel,
  .faq-item {
    padding: 1.05rem 1.1rem;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print Stylesheet for Hematology Clinic Visits & ER Triage Cards */
@media print {
  body {
    background: #FFFFFF;
    color: #000000;
    font-size: 10.5pt;
  }
  .site-header,
  .skip-link,
  .lang-switch,
  .site-footer,
  .clone-tabs,
  .dial-tabs {
    display: none !important;
  }
  .clone-panel[hidden],
  .dial-panel[hidden] {
    display: block !important;
    border-top: 1px solid #000;
    margin-top: 1rem;
  }
  .section,
  .hero-briefing {
    padding-block: 1rem;
  }
  a {
    color: #000000;
    text-decoration: underline;
  }
}