/* BIL design tokens. Change values here; every component uses these vars. */
:root {
  /* Palette */
  --bil-primary:      #1f6fb2;
  --bil-primary-hov:  #185891;
  --bil-primary-deep: #0f2f4c;
  --bil-accent:       #14b8a6;
  --bil-ink:          #132030;
  --bil-ink-soft:     #4a5b6e;
  --bil-muted:        #8496a6;
  --bil-line:         #e4ebf1;
  --bil-surface:      #ffffff;
  --bil-surface-2:    #f5f8fb;

  /* Bootstrap 5 theme overrides - palette flows into BS components */
  --bs-primary:       var(--bil-primary);
  --bs-primary-rgb:   31, 111, 178;
  --bs-body-color:    var(--bil-ink);
  --bs-body-color-rgb: 19, 32, 48;
  --bs-body-bg:       var(--bil-surface);
  --bs-border-color:  var(--bil-line);
  --bs-link-color:    var(--bil-primary);
  --bs-link-hover-color: var(--bil-primary-hov);

  /* Type scale */
  --fs-100: 12.5px; --fs-200: 14px; --fs-300: 16px; --fs-400: 18px;
  --fs-500: 22px;   --fs-600: 28px; --fs-700: 36px; --fs-800: 44px;

  /* Spacing scale */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 64px;

  /* Radii, shadows */
  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 20px;
  --shadow-card: 0 20px 50px -30px rgba(20, 28, 45, .3);
  --shadow-hero: 0 20px 50px -30px rgba(20, 28, 45, .4);

  /* Type families */
  --font-heading: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body:    system-ui, -apple-system, 'Segoe UI', 'Helvetica Neue', sans-serif;
}

/* Base */
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: var(--fs-300);
  line-height: 1.55;
  color: var(--bil-ink);
  background-color: var(--bil-surface);
}
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--bil-ink);
}
a { color: var(--bil-primary); text-decoration: none; }
a:hover { color: var(--bil-primary-hov); text-decoration: underline; }

.eyebrow {
  font-size: var(--fs-100);
  font-weight: 700;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--bil-primary);
}

/* Topbar */
.topbar { background: var(--bil-primary-deep); }
.topbar-in {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  padding: var(--sp-3) var(--sp-6);
}
.logo {
  display: flex; align-items: center; gap: var(--sp-2);
  color: #fff; font-family: var(--font-heading);
  font-weight: 800; font-size: var(--fs-400); letter-spacing: -.01em;
}
.logo:hover { color: #fff; text-decoration: none; }
.logo img { display: block; height: 30px; width: auto; }

.topbar-nav { padding: 0; margin-left: auto; }
.topbar-nav .nav-link,
.topbar-nav .navbar-toggler {
  color: #cfe0ef; font-size: var(--fs-200); font-weight: 600;
}
.topbar-nav .nav-link:hover { color: #fff; }
.topbar-nav .dropdown-menu {
  border: 1px solid var(--bil-line);
  box-shadow: var(--shadow-card);
  border-radius: var(--radius-md);
  padding: var(--sp-2);
}
.topbar-nav .dropdown-item {
  border-radius: var(--radius-sm);
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-200);
}
.topbar-nav .dropdown-item:hover {
  background: var(--bil-surface-2);
  color: var(--bil-primary);
}

/* Footer */
.site-footer {
  background: var(--bil-primary-deep);
  color: #cfe0ef;
  padding: var(--sp-6) 0;
  margin-top: var(--sp-8);
}
.site-footer-in {
  max-width: 1080px; margin: 0 auto; padding: 0 var(--sp-6);
  display: flex; flex-direction: column; gap: var(--sp-3);
}
.site-footer p { margin: 0; font-size: var(--fs-200); line-height: 1.6; }
.site-footer-rrid { font-weight: 600; color: #fff; }

.announcement {
  margin-top: var(--sp-3);
  background: #fff8e1;
  color: #614a12;
  border: 1px solid #e6d38c;
  border-radius: var(--radius-sm);
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-200);
}

/* Top-of-page site banner (opt-in via home_announcement front matter). */
.site-banner {
  background: linear-gradient(180deg, #fff4d1 0%, #ffe9a8 100%);
  border-bottom: 2px solid #d69e1a;
  color: #4d3608;
}
.site-banner-details { max-width: 1080px; margin: 0 auto; }
.site-banner-summary {
  list-style: none;
  cursor: pointer;
  padding: var(--sp-3) var(--sp-6);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-200);
}
.site-banner-summary::-webkit-details-marker { display: none; }
.site-banner-summary:hover .site-banner-toggle { color: #3a2705; }
.site-banner-icon {
  font-size: 20px;
  line-height: 1;
  color: #b8830f;
}
.site-banner-headline {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  flex-wrap: wrap;
  min-width: 0;
}
.site-banner-headline strong {
  font-family: var(--font-heading);
  font-size: var(--fs-300);
  font-weight: 800;
  color: #3a2705;
  letter-spacing: -.01em;
}
.site-banner-tagline {
  color: #6b4c0e;
}
.site-banner-toggle {
  color: #7a4d05;
  font-weight: 600;
  font-size: var(--fs-100);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}
.site-banner-details[open] .site-banner-toggle-open { display: none; }
.site-banner-details:not([open]) .site-banner-toggle-close { display: none; }
.site-banner-body {
  padding: 0 var(--sp-6) var(--sp-5);
  max-width: 900px;
  margin: 0 auto;
}
.site-banner-body p {
  margin: 0 0 var(--sp-3);
  font-size: var(--fs-200);
  line-height: 1.6;
}
.site-banner-body ul {
  margin: 0 0 var(--sp-3);
  padding-left: var(--sp-5);
  font-size: var(--fs-200);
  line-height: 1.55;
}
.site-banner-body ul li { margin-bottom: var(--sp-2); }
.site-banner code {
  background: rgba(255, 255, 255, .6);
  color: #3a2705;
  padding: 0 4px;
  border-radius: 3px;
  border: 1px solid rgba(0, 0, 0, .08);
  font-size: 0.92em;
}
.site-banner a {
  color: #7a4d05;
  text-decoration: underline;
  font-weight: 600;
}
.site-banner a:hover { color: #3a2705; }
.site-banner-contact { margin-bottom: 0 !important; font-weight: 600; }

@media (max-width: 700px) {
  .site-banner-summary {
    grid-template-columns: auto 1fr;
    padding: var(--sp-3) var(--sp-4);
  }
  .site-banner-toggle {
    grid-column: 1 / -1;
    text-align: right;
  }
  .site-banner-body { padding: 0 var(--sp-4) var(--sp-4); }
}

/* Hero */
.hero { padding: var(--sp-7) 0 var(--sp-6); }
.hero .container-hero {
  max-width: 1080px; margin: 0 auto; padding: 0 var(--sp-6);
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: var(--sp-6); align-items: center;
}
@media (max-width: 900px) {
  .hero .container-hero { grid-template-columns: 1fr; }
}
.hero-title {
  font-size: var(--fs-800);
  line-height: 1.06;
  margin: var(--sp-3) 0 0;
}
.hero-lead {
  font-size: var(--fs-400);
  color: var(--bil-ink-soft);
  line-height: 1.55;
  margin: var(--sp-4) 0 0;
  max-width: 480px;
}
.hero-cta { margin-top: var(--sp-5); display: flex; gap: var(--sp-3); flex-wrap: wrap; }

/* Search band - full-width prominent search directly below the hero */
.search-band {
  background: var(--bil-surface-2);
  border-top: 1px solid var(--bil-line);
  border-bottom: 1px solid var(--bil-line);
  padding: var(--sp-6) 0;
}
.search-band-in {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--sp-6);
}
.search-band .section-title { font-size: var(--fs-500); }
.search-band-frame {
  background: var(--bil-surface);
  border: 1px solid var(--bil-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--sp-2) var(--sp-3);
}
.search-band-frame iframe {
  display: block;
  width: 100%;
  border: 0;
}

/* Stat grid */
.stat-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--bil-line);
  border: 1px solid var(--bil-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hero);
}
@media (max-width: 500px) {
  .stat-grid { grid-template-columns: 1fr; }
}
.stat {
  background: var(--bil-surface);
  padding: var(--sp-5) var(--sp-4);
}
.stat-v {
  font-size: var(--fs-700);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--bil-ink);
  font-variant-numeric: tabular-nums;
}
.stat-v small {
  font-size: var(--fs-400);
  font-weight: 700;
  color: var(--bil-primary);
  margin-left: 1px;
}
.stat-k {
  font-size: var(--fs-100);
  color: var(--bil-ink-soft);
  margin-top: var(--sp-2);
  font-weight: 500;
}

/* Bar list (species, modalities) */
.bar-list { display: flex; flex-direction: column; gap: var(--sp-2); }
.bar-row {
  display: grid;
  grid-template-columns: 200px 1fr auto;
  align-items: center;
  gap: var(--sp-3);
}
@media (max-width: 600px) {
  .bar-row { grid-template-columns: 1fr; gap: var(--sp-1); }
}
.bar-name { font-size: var(--fs-100); font-weight: 600; text-align: right; }
.bar-track {
  height: 16px;
  background: var(--bil-surface-2);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: var(--radius-sm);
  min-width: 4px;
  background: linear-gradient(90deg, var(--bil-primary), #3a93cf);
}
.bar-count {
  font-size: var(--fs-100);
  color: var(--bil-ink-soft);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 52px;
  text-align: right;
}

/* Content card (wraps long-form pages) */
.content-card {
  background: var(--bil-surface);
  border: 1px solid var(--bil-line);
  border-radius: var(--radius-xl);
  padding: var(--sp-6) var(--sp-6);
  box-shadow: var(--shadow-card);
  max-width: 900px;
  margin: 0 auto;
}
/* Wider variant for image/screenshot-heavy documentation. */
.content-card.content-card--wide { max-width: 1140px; }
.content-card--wide img.img-fluid {
  /* Let screenshots peek slightly past the card padding - visually breathe
     while keeping the surrounding prose column at a comfortable reading width. */
  max-width: min(960px, 100%) !important;
}
.content-card h1 { font-size: var(--fs-700); margin: 0 0 var(--sp-4); }
.content-card h2 { font-size: var(--fs-500); margin-top: var(--sp-5); }
.content-card h2:first-child { margin-top: 0; }
.content-card h3 { font-size: var(--fs-400); margin-top: var(--sp-5); }
.content-card p { margin: var(--sp-3) 0; }
.content-card ul, .content-card ol { padding-left: var(--sp-6); }

/* Section headings (shared across cards) */
.section-eyebrow { font-size: var(--fs-100); font-weight: 700; letter-spacing: .11em;
  text-transform: uppercase; color: var(--bil-primary); }
.section-title   { font-size: var(--fs-500); font-weight: 800; letter-spacing: -.02em;
  margin: 0; }
.section-sub     { font-size: var(--fs-200); color: var(--bil-ink-soft);
  margin: var(--sp-2) 0 0; line-height: 1.5; }

/* Most cited datasets (landing page) */
.cited-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.cited-item {
  border: 1px solid var(--bil-line);
  border-radius: var(--radius-md);
  background: var(--bil-surface-2);
  overflow: hidden;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.cited-item:hover {
  border-color: var(--bil-primary);
  background: var(--bil-surface);
  box-shadow: 0 4px 14px -8px rgba(20, 28, 45, .25);
}
.cited-link {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  color: inherit;
  text-decoration: none;
}
.cited-link:hover { color: inherit; text-decoration: none; }
.cited-link:focus-visible {
  outline: 2px solid var(--bil-primary);
  outline-offset: -2px;
}
.cited-id {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--bil-surface);
  color: var(--bil-ink-soft);
  border: 1px solid var(--bil-line);
}
.cited-rank {
  font-size: var(--fs-200);
  font-weight: 800;
  color: var(--bil-muted);
  width: 20px;
  text-align: center;
  flex: none;
}
.cited-thumb {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  flex: none;
  background: linear-gradient(135deg, var(--bil-primary), var(--bil-accent));
  opacity: .9;
}
.cited-meta { flex: 1; min-width: 0; }
.cited-title {
  font-size: var(--fs-300);
  font-weight: 700;
  color: var(--bil-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cited-tags {
  font-size: var(--fs-100);
  color: var(--bil-ink-soft);
  margin-top: 4px;
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}
.cited-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  background: #e8f1fa;
  color: var(--bil-primary);
}
.cited-count { text-align: right; flex: none; }
.cited-count b {
  display: block;
  font-size: var(--fs-500);
  color: var(--bil-ink);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.cited-count span {
  font-size: var(--fs-100);
  color: var(--bil-muted);
}

/* Downloads world map (landing page) */
.map-wrap {
  border: 1px solid var(--bil-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bil-surface);
}
.map-wrap img { display: block; width: 100%; height: auto; }
.map-cap {
  font-size: var(--fs-200);
  color: var(--bil-ink-soft);
  line-height: 1.6;
  margin: var(--sp-4) 0 0;
}
.map-cap-lead { font-weight: 700; color: var(--bil-ink); }
.dot-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-5);
  font-size: var(--fs-100);
  color: var(--bil-ink-soft);
}
.dot-legend span { display: inline-flex; align-items: center; gap: var(--sp-2); font-weight: 600; }
.dot-legend i {
  width: 10px; height: 10px; border-radius: 50%; display: inline-block;
}

/* Feature grid (replaces homepage carousel) */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4);
}
@media (max-width: 780px) { .feature-grid { grid-template-columns: 1fr; } }
.feature-card {
  display: flex;
  flex-direction: column;
  background: var(--bil-surface);
  border: 1px solid var(--bil-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  color: inherit;
  text-decoration: none;
  transition: transform .18s, box-shadow .18s, border-color .18s;
}
.feature-card:hover {
  color: inherit;
  text-decoration: none;
  transform: translateY(-2px);
  border-color: var(--bil-primary);
  box-shadow: 0 24px 40px -24px rgba(20, 28, 45, .35);
}
.feature-card:focus-visible {
  outline: 2px solid var(--bil-primary);
  outline-offset: 2px;
}
.feature-card img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: #000;
}
.feature-card-body {
  padding: var(--sp-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
}
.feature-card-caption {
  font-size: var(--fs-200);
  color: var(--bil-ink);
  font-weight: 600;
  margin: 0;
  flex: 1;
}
.feature-card-id {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--bil-surface-2);
  color: var(--bil-ink-soft);
  border: 1px solid var(--bil-line);
  flex: none;
}

/* Buttons - BS5 primary styling with our palette */
.btn-primary,
.btn-primary:focus {
  background-color: var(--bil-primary);
  border-color: var(--bil-primary);
}
.btn-primary:hover {
  background-color: var(--bil-primary-hov);
  border-color: var(--bil-primary-hov);
}

/* Table of contents (long doc pages) */
.bil-toc {
  background: var(--bil-surface-2);
  border: 1px solid var(--bil-line);
  border-radius: var(--radius-md);
  padding: var(--sp-4) var(--sp-5);
}
.bil-toc-list {
  list-style: decimal;
  padding-left: var(--sp-5);
  margin: 0;
  columns: 2;
  column-gap: var(--sp-6);
}
.bil-toc-list li { break-inside: avoid; margin-bottom: var(--sp-1); }
.bil-toc-list li.bil-toc-sub {
  list-style: none;
  font-size: var(--fs-100);
  margin-left: var(--sp-3);
}
.bil-toc-list a { color: var(--bil-ink); }
.bil-toc-list a:hover { color: var(--bil-primary); }
@media (max-width: 700px) {
  .bil-toc-list { columns: 1; }
}

/* Inline code + <pre> inside content-card */
.content-card code {
  background: var(--bil-surface-2);
  color: var(--bil-primary-deep);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  border: 1px solid var(--bil-line);
}
.content-card pre {
  background: var(--bil-primary-deep);
  color: #e6f0fa;
  padding: var(--sp-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: var(--fs-200);
}
.content-card pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  border: 0;
}

/* Alerts inside content-card - a little breathing room */
.content-card .alert { margin: var(--sp-4) 0; }

/* Embedded viewer frame (Neuroglancer, brAinPI, etc.) */
.viewer-frame {
  position: relative;
  width: 100%;
  height: 600px;
  border: 1px solid var(--bil-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--bil-primary-deep);
}
.viewer-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
@media (max-width: 780px) {
  .viewer-frame { height: 400px; }
}

/* <kbd> - keyboard-shortcut styling */
.content-card kbd {
  background: var(--bil-primary-deep);
  color: #e6f0fa;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  border: 1px solid rgba(0,0,0,.15);
  box-shadow: 0 1px 0 rgba(0,0,0,.15);
}

/* Data tables inside content cards (metadata model page) */
.content-card .table {
  --bs-table-bg: var(--bil-surface);
  font-size: var(--fs-200);
}
.content-card .table thead th {
  background: var(--bil-primary-deep);
  color: #fff;
  font-weight: 700;
  font-size: var(--fs-100);
  letter-spacing: .04em;
  text-transform: uppercase;
  border-color: var(--bil-primary-deep);
  vertical-align: middle;
}
.content-card .table td { vertical-align: top; }
.content-card .table tr.bil-table-section td {
  background: var(--bil-surface-2);
  color: var(--bil-ink);
  font-weight: 700;
  font-size: var(--fs-200);
  text-align: center;
  letter-spacing: .02em;
}
.content-card .table a { word-break: break-word; }
.content-card .table-responsive {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--bil-line);
  margin-left: calc(var(--sp-6) * -1);
  margin-right: calc(var(--sp-6) * -1);
}
.content-card .table-responsive > .table { margin-bottom: 0; }
.content-card .table-responsive > .table > :not(caption) > * > * {
  padding: var(--sp-2) var(--sp-3);
}
@media (max-width: 780px) {
  .content-card .table-responsive {
    margin-left: 0; margin-right: 0;
  }
}

/* Unavailable state for stats block */
.bil-stats--unavailable .bar-list,
.bil-stats--unavailable .stat-grid { display: none; }
.bil-stats--unavailable .bil-stats-unavailable-msg { display: block; }
.bil-stats-unavailable-msg {
  display: none;
  padding: var(--sp-4);
  color: var(--bil-ink-soft);
  font-size: var(--fs-200);
}