/* =========================================================
   GHK-Cu Script — Linear Precision Dark
   Aesthetic: linear-precision-dark
   Palette: #08090A / #0F1011 / #191A1B / indigo #5E6AD2
   ========================================================= */

/* ----- Reset ----- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0ms !important; animation-duration: 0ms !important; }
}

body {
  background-color: #08090A;
  color: #F7F8F8;
  font-family: 'Geist', 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  letter-spacing: 0;
  min-height: 100vh;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* ----- CSS Variables ----- */
:root {
  --primary:          #5E6AD2;
  --primary-50:       #1A1C2E;
  --primary-300:      #828FFF;
  --primary-500:      #7170FF;
  --secondary:        #828FFF;
  --accent:           #5E6AD2;
  --accent-bright:    #7170FF;

  --neutral-50:       #F7F8F8;
  --neutral-200:      #C9CBD1;
  --neutral-400:      #8A8F98;
  --neutral-500:      #6B7280;
  --neutral-900:      #08090A;

  --bg:               #08090A;
  --surface:          #0F1011;
  --surface-elevated: #191A1B;
  --surface-inset:    #0B0C0D;

  --text:             #F7F8F8;
  --text-muted:       #9CA0A8;
  --text-faint:       #6B7280;

  --border:           rgba(255,255,255,0.06);
  --border-strong:    rgba(255,255,255,0.10);
  --rule:             rgba(255,255,255,0.06);

  --success:          #4CC38A;
  --warning:          #D9A441;
  --danger:           #E5484D;

  --max-width:        70rem;
  --container-px:     clamp(1rem, 3vw, 2rem);

  --font-heading:     'Geist', 'Inter', system-ui, -apple-system, sans-serif;
  --font-body:        'Geist', 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:        'Geist Mono', 'IBM Plex Mono', 'SF Mono', ui-monospace, 'Courier New', monospace;

  --radius-button:    0.375rem;
  --radius-card:      0.5rem;
  --radius-chip:      0.25rem;

  --transition:       160ms ease;
}

/* ----- Typography Scale ----- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text);
  line-height: 1.12;
}

h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  letter-spacing: -0.02em;
  line-height: 1.12;
}

h3 {
  font-size: 1.3125rem;
  letter-spacing: -0.015em;
  line-height: 1.2;
}

h4 {
  font-size: 1.0625rem;
  letter-spacing: -0.015em;
  line-height: 1.3;
}

p {
  color: var(--text);
  font-size: 1.0625rem;
  line-height: 1.65;
  max-width: 64ch;
}

.lede {
  font-size: 1.1875rem;
  line-height: 1.5;
  color: var(--text-muted);
  max-width: 64ch;
}

small, .small {
  font-size: 0.875rem;
  line-height: 1.5;
}

.micro {
  font-size: 0.8125rem;
  line-height: 1.5;
}

/* Mono eyebrow label */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  display: block;
  margin-bottom: 0.75rem;
}

/* ----- Container / Layout ----- */
.container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-px);
  padding-right: var(--container-px);
}

/* Reading column — 64ch max */
.prose {
  max-width: 64ch;
}

/* ----- Site Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 56px;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 100%;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.site-brand::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--primary);
  flex-shrink: 0;
}

.site-brand:hover {
  color: var(--text);
}

/* ----- Primary Nav ----- */
.site-nav {
  display: none;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.375rem 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}

.site-nav a .nav-index {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-faint);
  letter-spacing: 0.05em;
}

.site-nav a:hover {
  color: var(--text);
}

.site-nav a.active {
  color: var(--text);
  border-bottom-color: var(--primary);
}

/* Mobile nav toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  height: 1px;
  background-color: var(--text-muted);
  transition: background-color var(--transition);
}

.nav-toggle:hover span {
  background-color: var(--text);
}

/* Mobile nav menu */
.mobile-nav {
  display: none;
  position: absolute;
  top: 56px;
  left: 0;
  right: 0;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0;
  z-index: 99;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav ul {
  list-style: none;
}

.mobile-nav a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem var(--container-px);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
}

.mobile-nav a .nav-index {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-faint);
}

.mobile-nav a:hover {
  color: var(--text);
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .site-nav { display: flex; }
  .mobile-nav { display: none !important; }
}

/* ----- Hero ----- */
.hero {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: 46ch;
}

.hero h1 {
  margin-bottom: 1rem;
}

.hero .lede {
  margin-bottom: 1.75rem;
}

/* Spec strip */
.spec-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.spec-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background-color: var(--surface-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  padding: 0.3125rem 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.spec-chip .spec-key {
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.spec-chip .spec-sep {
  color: var(--primary);
}

.spec-chip .spec-val {
  color: var(--text);
}

/* CTA row */
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6875rem 1.125rem;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: rgba(255,255,255,0.04);
  border: 1px solid var(--border-strong);
  color: var(--text);
}

.btn-primary:hover {
  background-color: rgba(255,255,255,0.07);
  border-color: var(--primary);
  color: var(--text);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.btn-secondary:hover {
  background-color: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-secondary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-ghost {
  background: none;
  border: none;
  color: var(--text);
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--primary);
}

.btn-ghost:hover {
  text-decoration-color: var(--primary-500);
  color: var(--text);
}

/* ----- Main Content ----- */
main {
  padding: 2.5rem 0 4rem;
}

/* ----- Sections ----- */
.content-section {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}

.content-section:last-child {
  border-bottom: none;
}

.section-heading {
  margin-bottom: 1.25rem;
}

/* Section body prose */
.section-body p {
  margin-bottom: 1rem;
}

.section-body p:last-child {
  margin-bottom: 0;
}

.section-body h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.section-body h4 {
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

.section-body ul {
  margin-bottom: 1rem;
  padding-left: 0;
}

.section-body ul li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.375rem;
  font-size: 1.0625rem;
  line-height: 1.65;
}

.section-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background-color: var(--primary);
}

.section-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.section-body ol li {
  margin-bottom: 0.375rem;
  font-size: 1.0625rem;
  line-height: 1.65;
}

.section-body strong {
  font-weight: 600;
  color: var(--text);
}

.section-body em {
  font-style: italic;
  color: var(--text-muted);
}

/* Inline citation superscript */
.section-body sup a,
.citation-sup {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 1px;
  text-decoration-color: var(--primary);
  vertical-align: super;
  line-height: 0;
}

.section-body sup a:hover,
.citation-sup:hover {
  text-decoration-color: var(--primary-500);
}

/* ----- Cards ----- */
.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  transition: border-color var(--transition), background-color var(--transition);
}

.card:hover {
  border-color: var(--border-strong);
  background-color: var(--surface-elevated);
}

.card-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.5rem;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.625rem;
}

/* ----- Callout ----- */
.callout {
  background-color: var(--surface-inset);
  border: 1px solid var(--border);
  border-left: 2px solid var(--primary);
  border-radius: var(--radius-chip);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.callout-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.callout p {
  font-size: 0.9375rem;
  color: var(--text);
  max-width: none;
}

/* ----- Study Ledger ----- */
.study-ledger {
  margin: 1.5rem 0;
}

.ledger-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  background-color: var(--surface);
  border-left: 2px solid var(--primary);
  padding-left: 1rem;
  margin-bottom: 0.5rem;
  transition: border-left-color var(--transition), background-color var(--transition);
}

.ledger-row:hover {
  border-left-color: var(--primary-500);
  background-color: rgba(255,255,255,0.02);
}

.ledger-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-faint);
  padding-top: 0.125rem;
  white-space: nowrap;
}

.ledger-content .ledger-claim {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.5rem;
  max-width: none;
}

.ledger-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  align-items: center;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.1875rem 0.4375rem;
  border-radius: var(--radius-chip);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  background: transparent;
  white-space: nowrap;
}

.chip-accent {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-50);
}

.chip-success {
  border-color: var(--success);
  color: var(--success);
}

.chip-warning {
  border-color: var(--warning);
  color: var(--warning);
}

/* ----- Figure ----- */
figure.site-figure {
  background-color: var(--surface-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin: 1.5rem 0;
}

figure.site-figure img {
  width: 100%;
  height: auto;
  display: block;
}

figure.site-figure figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

figure.site-figure figcaption .fig-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  margin-right: 0.5rem;
  letter-spacing: 0.05em;
}

/* ----- Dosage Table ----- */
.dose-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  margin: 1.5rem 0;
}

.dose-table thead tr {
  border-bottom: 1px solid var(--border-strong);
}

.dose-table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  text-align: left;
  padding: 0.625rem 0.75rem;
}

.dose-table th:last-child,
.dose-table td:last-child {
  text-align: right;
}

.dose-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
  line-height: 1.5;
}

.dose-table td.mono {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.dose-table tbody tr:hover td {
  background-color: rgba(255,255,255,0.02);
}

/* ----- References List ----- */
.references-list {
  list-style: none;
  margin: 1.5rem 0;
}

.references-list li {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.references-list li:last-child {
  border-bottom: none;
}

.ref-num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text);
  flex-shrink: 0;
  min-width: 2rem;
  padding-top: 0.125rem;
}

.ref-body {
  flex: 1;
}

.ref-citation {
  color: var(--text-muted);
}

.ref-meta {
  margin-top: 0.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.ref-doi {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  background-color: var(--surface-inset);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 0.0625rem 0.375rem;
}

.ref-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.ref-link:hover {
  color: var(--primary-500);
}

/* ----- FAQ ----- */
.faq-group {
  margin-bottom: 2.5rem;
}

.faq-group-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-strong);
  margin-bottom: 1rem;
}

.faq-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.faq-q {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.625rem;
}

.faq-a {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.65;
  max-width: 64ch;
}

.faq-a p {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: none;
  margin-bottom: 0.5rem;
}

/* ----- Contact Form ----- */
.contact-form {
  margin-top: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.5rem;
}

.form-input,
.form-textarea {
  width: 100%;
  max-width: 36rem;
  background-color: var(--surface-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-chip);
  padding: 0.625rem 0.875rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text);
  transition: border-color var(--transition);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-textarea {
  min-height: 8rem;
  resize: vertical;
  line-height: 1.6;
}

/* ----- Reading Progress Bar ----- */
.reading-progress {
  position: fixed;
  top: 56px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  z-index: 99;
  transition: width 0.1s linear;
}

/* ----- Two Column Layout (research + sidebar) ----- */
.two-col {
  display: block;
}

.two-col-main {
  width: 100%;
}

.two-col-sidebar {
  display: none;
}

@media (min-width: 900px) {
  .two-col {
    display: grid;
    grid-template-columns: 1fr 14rem;
    gap: 3rem;
    align-items: start;
  }

  .two-col-sidebar {
    display: block;
    position: sticky;
    top: calc(56px + 2rem);
  }
}

.sidebar-nav {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 1rem;
}

.sidebar-nav-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.75rem;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav li + li {
  margin-top: 0.125rem;
}

.sidebar-nav a {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 0.3rem 0.5rem;
  border-radius: 0.25rem;
  transition: color var(--transition), background-color var(--transition);
}

.sidebar-nav a:hover {
  color: var(--text);
  background-color: rgba(255,255,255,0.02);
}

.sidebar-nav a.active {
  color: var(--primary);
}

/* ----- Site Footer ----- */
.site-footer {
  background-color: var(--surface-inset);
  border-top: 1px solid var(--border-strong);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

@media (min-width: 640px) {
  .footer-top {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer-col-heading {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-col-heading .col-index {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-faint);
}

.footer-col ul li + li {
  margin-top: 0.25rem;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
}

.footer-disclaimer {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  max-width: 50ch;
}

.footer-colophon {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  text-align: right;
  line-height: 1.6;
}

/* ----- 404 page ----- */
.page-404 {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 56px);
  text-align: center;
  padding: 2rem;
}

.page-404 .error-code {
  font-family: var(--font-mono);
  font-size: 5rem;
  font-weight: 500;
  color: var(--text-faint);
  line-height: 1;
  margin-bottom: 1rem;
}

.page-404 h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 0.75rem;
}

.page-404 p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  margin-left: auto;
  margin-right: auto;
}

/* ----- Inline code ----- */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--surface-inset);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 0.0625rem 0.375rem;
  color: var(--text);
}

/* ----- Breadcrumb ----- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  margin-bottom: 2rem;
}

.breadcrumb a {
  color: var(--text-faint);
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--text-muted);
}

.breadcrumb-sep {
  color: var(--border-strong);
}

/* ----- DataTables dark theme override ----- */
.dataTables_wrapper {
  color: var(--text);
  font-size: 0.9375rem;
}

.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
  background-color: var(--surface-inset);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 0.25rem;
  padding: 0.375rem 0.5rem;
  font-family: var(--font-body);
}

.dataTables_wrapper .dataTables_filter label,
.dataTables_wrapper .dataTables_length label,
.dataTables_wrapper .dataTables_info {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
  color: var(--text-muted) !important;
  background: transparent;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-chip);
  padding: 0.25rem 0.5rem;
  margin: 0 0.125rem;
  cursor: pointer;
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
  color: var(--text) !important;
  background: rgba(255,255,255,0.04) !important;
  border-color: var(--border-strong) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
  color: var(--primary) !important;
  background: var(--primary-50) !important;
  border-color: var(--primary) !important;
}

table.dataTable thead th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  border-bottom: 1px solid var(--border-strong);
  background-color: transparent;
  padding: 0.625rem 0.75rem;
}

table.dataTable tbody td {
  border-bottom: 1px solid var(--border);
  padding: 0.75rem;
  color: var(--text);
  vertical-align: top;
  background-color: transparent;
}

table.dataTable tbody tr:hover td {
  background-color: rgba(255,255,255,0.02) !important;
}

table.dataTable.no-footer {
  border-bottom: 1px solid var(--border);
}

/* ----- Tippy dark skin override ----- */
.tippy-box[data-theme~='ghk-dark'] {
  background-color: var(--surface-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-size: 0.875rem;
  font-family: var(--font-body);
  max-width: 24rem;
  box-shadow: none;
}

.tippy-box[data-theme~='ghk-dark'] .tippy-arrow {
  color: var(--surface-elevated);
}

/* ----- Focus Styles ----- */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ----- Utility ----- */
.text-muted { color: var(--text-muted); }
.text-faint { color: var(--text-faint); }
.text-accent { color: var(--primary); }
.mono { font-family: var(--font-mono); }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ----- Responsive ----- */
@media (max-width: 640px) {
  .cta-row { flex-direction: column; align-items: flex-start; }
  .spec-strip { gap: 0.375rem; }
}