/* ============================================================
   Epitalon Source — Analytics Metric Flow
   Palette: dark forest #14532D | vibrant green #16A34A | cool off-white #F7F8F3
   Typography: Space Grotesk (display/numerals) + Inter (body)
   ============================================================ */

/* --- Custom Properties ---------------------------------------- */
:root {
  --primary:         #14532D;
  --primary-50:      #ECFDF3;
  --primary-100:     #DCFCE7;
  --primary-200:     #BBF7D0;
  --primary-500:     #16A34A;
  --primary-700:     #15803D;
  --primary-900:     #0B3A20;
  --secondary:       #111827;
  --accent:          #16A34A;
  --neutral-50:      #FBFCFA;
  --neutral-100:     #F3F4F6;
  --neutral-200:     #E5E7EB;
  --neutral-300:     #D1D5DB;
  --neutral-500:     #6B7280;
  --neutral-700:     #374151;
  --neutral-900:     #111827;
  --bg:              #F7F8F3;
  --surface:         #FFFFFF;
  --surface-inset:   #F3F4F6;
  --surface-dark:    #14532D;
  --surface-dark-elevated: #0B3A20;
  --text:            #111827;
  --text-muted:      #4B5563;
  --text-on-dark:    #F7F8F3;
  --text-on-green:   #FFFFFF;
  --rule:            #E5E7EB;
  --rule-accent:     #16A34A;
  --mint-highlight:  #DCFCE7;
  --node-line:       #BBF7D0;
  --link:            #15803D;
  --link-visited:    #0B3A20;
  --success:         #16A34A;
  --warning:         #B45309;
  --danger:          #B91C1C;

  --font-heading:    'Space Grotesk', 'Helvetica Neue', 'Inter', system-ui, -apple-system, sans-serif;
  --font-body:       'Inter', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;

  --max-width:       74rem;
  --container-px:    clamp(1rem, 3.5vw, 2.5rem);
  --reading-width:   40rem;

  --radius-button:   9999px;
  --radius-card:     0.75rem;
  --radius-chip:     0.4rem;

  /* Type scale */
  --sz-metric-display: clamp(4.5rem, 12vw, 9rem);
  --sz-metric-unit:    clamp(1.25rem, 2.5vw, 2rem);
  --sz-h1:             clamp(2rem, 4.5vw, 3.25rem);
  --sz-h2:             clamp(1.625rem, 3.5vw, 2.5rem);
  --sz-h3:             1.375rem;
  --sz-h4:             1.0625rem;
  --sz-lede:           1.25rem;
  --sz-body:           1.0625rem;
  --sz-small:          0.875rem;
  --sz-micro:          0.8125rem;
  --sz-eyebrow:        0.8125rem;
  --sz-nav:            0.9375rem;
}

/* --- Reset ---------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0ms !important; animation-duration: 0ms !important; }
}
body {
  font-family: var(--font-body);
  font-size: var(--sz-body);
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-decoration: none; }
a:visited { color: var(--link-visited); }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 2px; }
ul, ol { padding-left: 1.5rem; }
li { margin-bottom: 0.375rem; }
p { margin-bottom: 1.25rem; }
p:last-child { margin-bottom: 0; }

/* --- Typography ----------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text);
  line-height: 1.15;
}
h1 {
  font-size: var(--sz-h1);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.12;
}
h2 {
  font-size: var(--sz-h2);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
h3 {
  font-size: var(--sz-h3);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}
h4 {
  font-size: var(--sz-h4);
  font-weight: 600;
  margin-bottom: 0.5rem;
}
strong { font-weight: 600; }
em { font-style: italic; }
small { font-size: var(--sz-small); }

/* Eyebrow label */
.eyebrow {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-eyebrow);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}

/* Lede / intro paragraph */
.lede {
  font-size: var(--sz-lede);
  line-height: 1.45;
  color: var(--text-muted);
  max-width: 34rem;
  margin-bottom: 1.75rem;
}

/* Inline technical identifiers (PMID, DOI, sequences) */
.identifier {
  font-family: var(--font-heading);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  background-color: var(--surface-inset);
  border-radius: 0.25rem;
  padding: 0.0625rem 0.375rem;
  font-size: 0.9em;
}

/* Citation superscript links */
sup a {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.75em;
  color: var(--link);
  text-decoration: none;
  vertical-align: super;
  font-variant-numeric: tabular-nums;
}
sup a:hover { text-decoration: underline; }

/* --- Layout --------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--container-px);
}
.reading-col {
  max-width: var(--reading-width);
}
main { min-height: 50vh; }

/* --- Site Header --------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg);
  border-bottom: 1px solid var(--rule);
  height: 64px;
  display: flex;
  align-items: center;
  transition: box-shadow 200ms ease-out;
}
.site-header.scrolled { box-shadow: 0 1px 0 var(--rule); }
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* Brand wordmark */
.site-brand {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.site-brand::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--accent);
  flex-shrink: 0;
}
.site-brand:hover { text-decoration: none; color: var(--primary); }
.site-brand:visited { color: var(--text); }

/* Nav */
.site-nav { display: flex; align-items: center; }
.site-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}
.site-nav li { margin: 0; }
.site-nav a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--sz-nav);
  letter-spacing: 0.01em;
  color: var(--text);
  text-decoration: none;
  padding: 0.375rem 0.625rem;
  border-radius: 0.25rem;
  position: relative;
  display: block;
}
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0.625rem;
  right: 0.625rem;
  height: 2px;
  background-color: var(--accent);
  transform: scaleX(0);
  transition: transform 200ms ease-out;
  transform-origin: left;
}
.site-nav a:hover::after,
.site-nav a.active::after { transform: scaleX(1); }
.site-nav a:hover { text-decoration: none; }
.site-nav a:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--sz-nav);
  color: var(--text);
  padding: 0.5rem;
}
.nav-details { position: relative; }
.nav-details summary { list-style: none; cursor: pointer; }
.nav-details summary::-webkit-details-marker { display: none; }

/* --- Metric Hero --------------------------------------------- */
.hero {
  padding-block: clamp(3rem, 7vw, 5rem);
  border-bottom: 1px solid var(--rule);
}
.hero-inner {
  max-width: var(--reading-width);
}

/* Dominant metric block */
.metric-display {
  margin-bottom: 1rem;
}
.metric-number {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--sz-metric-display);
  letter-spacing: -0.03em;
  line-height: 0.95;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  display: block;
}
.metric-label-chip {
  display: inline-block;
  margin-top: 0.5rem;
  background-color: var(--mint-highlight);
  color: var(--primary-900);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-metric-unit);
  letter-spacing: 0.02em;
  padding: 0.25rem 0.75rem;
  border-radius: 0.4rem;
  line-height: 1.4;
}

/* Stat strip */
.stat-strip {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.75rem;
}
.stat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-micro);
  font-variant-numeric: tabular-nums;
  border: 1px solid var(--accent);
  border-radius: var(--radius-chip);
  padding: 0.25rem 0.625rem;
  color: var(--primary-700);
  white-space: nowrap;
}
.stat-chip-value { font-weight: 600; }

/* CTA row */
.cta-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}

/* --- Buttons -------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-button);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 200ms ease-out, color 200ms ease-out, border-color 200ms ease-out;
  line-height: 1;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
.btn-primary {
  background-color: var(--accent);
  color: var(--text-on-green);
  border: 1.5px solid transparent;
}
.btn-primary:hover { background-color: var(--primary-700); color: var(--text-on-green); text-decoration: none; }
.btn-secondary {
  background-color: transparent;
  color: var(--primary-700);
  border: 1.5px solid var(--accent);
}
.btn-secondary:hover { background-color: var(--mint-highlight); text-decoration: none; color: var(--primary); }
.btn-ghost {
  background-color: transparent;
  color: var(--primary-700);
  border: none;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
}
.btn-ghost:hover { color: var(--primary); }

/* --- Hero Figure (below hero text) ---------------------------- */
.hero-figure {
  margin-block: 0;
  border-top: 1px solid var(--rule);
}
.hero-figure img {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
}

/* --- Page Body: Metric Flow Bands ----------------------------- */
.band {
  padding-block: 3rem;
  border-bottom: 1px solid var(--rule);
}
.band:nth-child(even) { background-color: var(--surface-inset); }
.band-inner {
  max-width: var(--reading-width);
}

/* Section headings */
.band h2 {
  margin-bottom: 0.5rem;
}
.band .accent-rule {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--rule-accent);
  margin-bottom: 1.5rem;
}

/* Inline metric pull-outs */
.inline-metric {
  margin-block: 1.5rem;
  padding-left: 1rem;
  border-left: 3px solid var(--rule-accent);
}
.inline-metric-number {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.75rem;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  display: block;
}
.inline-metric-caption {
  font-size: var(--sz-micro);
  color: var(--text-muted);
  margin-top: 0.125rem;
}

/* --- Cards ---------------------------------------------------- */
.card {
  background-color: var(--surface);
  border: 1px solid rgba(22, 163, 74, 0.35);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  box-shadow: 0 1px 2px rgba(17, 24, 39, 0.04);
}
.card-eyebrow {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.375rem;
  display: block;
}
.card-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text);
  margin-bottom: 0.75rem;
}
.card-metric {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 2.25rem;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  display: block;
  margin-bottom: 0.375rem;
}

/* Metric card grid */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  gap: 1rem;
  margin-block: 2rem;
}

/* Study card */
.study-card {
  position: relative;
}
.study-card .species-dose {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-small);
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  margin-top: 0.5rem;
}
.study-card .outcome-chip {
  display: inline-block;
  background-color: var(--mint-highlight);
  color: var(--primary-900);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-micro);
  padding: 0.1875rem 0.5rem;
  border-radius: var(--radius-chip);
  margin-top: 0.5rem;
}
.study-cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}
@media (min-width: 640px) {
  .study-cards-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --- Callouts / Notices --------------------------------------- */
.callout {
  background-color: var(--surface);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 0 0.5rem 0.5rem 0;
  padding: 1rem 1.25rem;
  margin-block: 1.5rem;
}
.callout-eyebrow {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 0.375rem;
  display: block;
}
.callout-telomerase { border-left-color: var(--warning); }
.callout-telomerase .callout-eyebrow-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--warning);
  margin-right: 0.375rem;
  vertical-align: middle;
}

/* --- Tables --------------------------------------------------- */
.table-wrap { overflow-x: auto; margin-block: 1.5rem; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--sz-small);
}
thead th {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--sz-small);
  text-align: left;
  padding: 0.875rem 0.75rem;
  border-bottom: 2px solid var(--primary);
  color: var(--text);
}
thead th:is([data-numeric]) { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr { border-bottom: 1px solid var(--rule); }
tbody tr:nth-child(even) { background-color: var(--surface-inset); }
tbody tr:nth-child(odd) { background-color: var(--surface); }
tbody td {
  padding: 0.875rem 0.75rem;
  vertical-align: top;
  color: var(--text);
}
tbody td.positive { background-color: var(--mint-highlight); }
tbody td.numeric {
  text-align: right;
  font-family: var(--font-heading);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

/* --- Figures -------------------------------------------------- */
.figure-block {
  border: 1px solid rgba(22, 163, 74, 0.35);
  border-radius: 0.75rem;
  overflow: hidden;
  margin-block: 2rem;
  box-shadow: 0 1px 2px rgba(17, 24, 39, 0.04);
}
.figure-block img { width: 100%; height: auto; }
.figure-caption {
  padding: 0.75rem 1rem;
  font-size: var(--sz-small);
  color: var(--text);
  background-color: var(--surface-inset);
}
.figure-caption .fig-label {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-micro);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-right: 0.5rem;
}

/* --- Chips ---------------------------------------------------- */
.chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-micro);
  font-variant-numeric: tabular-nums;
  padding: 0.1875rem 0.5rem;
  border-radius: var(--radius-chip);
  white-space: nowrap;
}
.chip-outline-green { border: 1px solid var(--accent); color: var(--primary-700); background: transparent; }
.chip-mint { background-color: var(--mint-highlight); color: var(--primary-900); }
.chip-amber { border: 1px solid var(--warning); color: var(--warning); background: transparent; }
.chip-danger { border: 1px solid var(--danger); color: var(--danger); background: transparent; }

/* --- References list ------------------------------------------ */
.references-list {
  list-style: decimal;
  padding-left: 1.5rem;
  margin-top: 1.5rem;
}
.references-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: var(--sz-small);
  line-height: 1.6;
  margin: 0;
}
.references-list li:last-child { border-bottom: none; }
.ref-authors { font-weight: 600; }
.ref-journal { color: var(--text-muted); }
.ref-ids {
  font-family: var(--font-heading);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  font-size: var(--sz-micro);
  color: var(--primary-700);
  margin-top: 0.25rem;
  display: block;
}

/* DataTables override */
#references-table_wrapper { margin-top: 1.5rem; }
#references-table_wrapper .dataTables_filter input {
  border: 1px solid var(--rule);
  border-radius: 0.375rem;
  padding: 0.375rem 0.625rem;
  font-family: var(--font-body);
  font-size: var(--sz-small);
  background-color: var(--surface);
  color: var(--text);
}
#references-table { width: 100% !important; }

/* --- FAQ ------------------------------------------------------ */
.faq-list {
  list-style: none;
  padding: 0;
  margin-top: 1.5rem;
}
.faq-item {
  border-bottom: 1px solid var(--rule);
  margin: 0;
}
.faq-question {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--sz-body);
  color: var(--text);
  padding: 1rem 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  list-style: none;
  user-select: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '+';
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 1.25rem;
  color: var(--accent);
  flex-shrink: 0;
  line-height: 1.3;
}
details[open] > .faq-question::after { content: '−'; }
.faq-answer {
  padding: 0 0 1.25rem 0;
  font-size: var(--sz-body);
  color: var(--text);
  max-width: var(--reading-width);
}

/* --- About page hero (dark inversion) ------------------------- */
.hero-dark {
  background-color: var(--surface-dark);
  padding-block: clamp(3rem, 7vw, 5rem);
}
.hero-dark .eyebrow { color: var(--primary-100); }
.hero-dark .metric-number { color: var(--text-on-dark); }
.hero-dark .metric-label-chip {
  background-color: rgba(220, 252, 231, 0.25);
  color: var(--primary-100);
}
.hero-dark h1 { color: var(--text-on-dark); }
.hero-dark .lede { color: rgba(247, 248, 243, 0.75); }
.hero-dark a:focus-visible { outline-color: var(--primary-100); }

/* --- Contact form -------------------------------------------- */
.contact-form {
  max-width: 36rem;
  margin-top: 2rem;
}
.form-group {
  margin-bottom: 1.25rem;
}
.form-label {
  display: block;
  font-weight: 500;
  font-size: var(--sz-small);
  margin-bottom: 0.375rem;
  color: var(--text);
}
.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--rule);
  border-radius: 0.375rem;
  font-family: var(--font-body);
  font-size: var(--sz-body);
  background-color: var(--surface);
  color: var(--text);
  transition: border-color 200ms ease-out;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-textarea { min-height: 8rem; resize: vertical; }

/* --- Footer --------------------------------------------------- */
.site-footer {
  background-color: var(--surface-dark);
  padding-block: 3rem 2rem;
  margin-top: 0;
}
.footer-disclaimer {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--sz-small);
  color: var(--text-on-dark);
  margin-bottom: 1.25rem;
}
.footer-rule {
  display: block;
  width: 100%;
  height: 1px;
  background-color: var(--accent);
  margin-bottom: 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 600px) {
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}
.footer-col-heading {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--sz-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary-100);
  margin-bottom: 0.75rem;
  display: block;
}
.footer-col ul {
  list-style: none;
  padding: 0;
}
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--sz-small);
  color: var(--text-on-dark);
  text-decoration: none;
}
.footer-col a:hover { text-decoration: underline; color: var(--primary-100); }
.footer-col a:focus-visible { outline-color: var(--primary-100); }
.footer-brand {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--text-on-dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.footer-brand::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--primary-100);
  flex-shrink: 0;
}
.footer-colophon {
  font-size: var(--sz-micro);
  color: var(--text-muted);
  color: rgba(247, 248, 243, 0.45);
  line-height: 1.5;
}
.footer-colophon a { color: inherit; text-decoration: underline; }
.footer-copyright {
  font-size: var(--sz-micro);
  color: rgba(247, 248, 243, 0.45);
  margin-top: 0.375rem;
}

/* --- 404 page ------------------------------------------------- */
.page-404 {
  text-align: center;
  padding-block: 6rem 4rem;
}
.page-404 .metric-number { color: var(--primary); display: block; margin-bottom: 1rem; }
.page-404 h1 { margin-bottom: 1rem; }
.page-404 p { max-width: 28rem; margin-inline: auto; margin-bottom: 2rem; }

/* --- Breadcrumb ---------------------------------------------- */
.breadcrumb {
  font-size: var(--sz-small);
  color: var(--text-muted);
  padding-block: 0.75rem;
  border-bottom: 1px solid var(--rule);
}
.breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  align-items: center;
}
.breadcrumb li { margin: 0; }
.breadcrumb li::after { content: '/'; margin-left: 0.375rem; color: var(--neutral-300); }
.breadcrumb li:last-child::after { display: none; }
.breadcrumb a { color: var(--link); }

/* --- Responsive ---------------------------------------------- */
@media (max-width: 879px) {
  .site-nav ul { display: none; }
  .nav-details { display: block; }
  .nav-details[open] ul {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--bg);
    border-bottom: 1px solid var(--rule);
    padding: 1rem var(--container-px);
    gap: 0.25rem;
    z-index: 99;
  }
  .nav-details[open] a { padding: 0.625rem 0; }
}
@media (min-width: 880px) {
  .nav-details summary { display: none; }
  .nav-details { display: contents; }
  .site-nav ul { display: flex; }
}
@media (min-width: 1024px) {
  .band-inner-wide { max-width: 56rem; }
}

/* --- Utility -------------------------------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}
.text-muted { color: var(--text-muted); }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }