/* ============================================================
   Buchenberg — Shared Stylesheet
   Light (default) + Dark mode via [data-theme="dark"]
   ============================================================ */

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

/* --- CSS varijable --- */
:root {
  --bg:           #f8f9fa;
  --surface:      #ffffff;
  --border:       #a2a9b1;
  --border-light: #eaecf0;
  --text:         #202122;
  --text-muted:   #54595d;
  --text-light:   #72777d;
  --link:         #3366cc;
  --link-hover:   #6a8fd8;
  --accent:       #3366cc;
  --header-bg:    #ffffff;
  --toc-bg:       #f8f9fa;
  --infobox-head: #cee0f2;
  --badge-bg:     #eaecf0;
  --font-serif:   'Linux Libertine','Georgia','Times New Roman',serif;
  --font-sans:    'Linux Biolinum','Helvetica Neue',Arial,sans-serif;
  --font-mono:    'Courier New',monospace;
  --shadow:       0 1px 4px rgba(0,0,0,0.08);
}

[data-theme="dark"] {
  --bg:           #18191a;
  --surface:      #242526;
  --border:       #3a3b3c;
  --border-light: #2d2e2f;
  --text:         #e4e6ea;
  --text-muted:   #b0b3b8;
  --text-light:   #8a8d91;
  --link:         #7aabf7;
  --link-hover:   #aac8ff;
  --accent:       #7aabf7;
  --header-bg:    #242526;
  --toc-bg:       #1e1f20;
  --infobox-head: #2a3a5a;
  --badge-bg:     #3a3b3c;
  --shadow:       0 1px 4px rgba(0,0,0,0.4);
}

/* --- Base --- */
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  transition: background .2s, color .2s;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--link-hover); }

/* --- Header --- */
#bb-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
  transition: background .2s, border-color .2s;
}
#bb-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 0;
}

/* Logo */
#bb-logo {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: bold;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  margin-right: 24px;
}
#bb-logo span { color: var(--accent); }
#bb-logo:hover { text-decoration: none; }

/* Nav */
#bb-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}
.bb-nav-link {
  padding: 4px 12px;
  border-radius: 3px;
  font-size: 13px;
  color: var(--text-muted);
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.bb-nav-link:hover {
  background: var(--border-light);
  color: var(--text);
  text-decoration: none;
}
.bb-nav-link.active {
  background: var(--accent);
  color: #fff;
}

/* Header controls — desna strana */
#bb-header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

/* Burger (mobile only) */
#bb-burger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-size: 18px;
  padding: 2px 8px;
  cursor: pointer;
}

/* UI language dropdown */
#bb-lang-select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 6px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  outline: none;
}
#bb-lang-select:hover { border-color: var(--accent); }
#bb-lang-select:focus { border-color: var(--accent); }

/* Dark mode toggle */
#bb-theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 3px 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-muted);
  transition: background .15s;
  line-height: 1;
}
#bb-theme-toggle:hover { background: var(--border-light); }

/* --- Page wrapper --- */
#bb-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* --- Footer --- */
#bb-footer {
  border-top: 1px solid var(--border);
  background: var(--toc-bg);
  padding: 16px 0;
  margin-top: 48px;
  font-size: 12px;
  color: var(--text-light);
  text-align: center;
}
#bb-footer a { color: var(--text-light); }
#bb-footer a:hover { color: var(--link); }

.bb-prose pre { overflow-x: auto; }

/* --- Sidebar layout (za reader) --- */
.bb-layout-sidebar {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
}

/* --- Surface box (sidebar, infobox...) --- */
.bb-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: background .2s, border-color .2s;
}
.bb-box-title {
  background: var(--toc-bg);
  border-bottom: 1px solid var(--border);
  padding: 6px 12px;
  font-weight: bold;
  font-size: 13px;
  color: var(--text);
}
.bb-box-body { padding: 10px 12px; }

/* --- Main content panel --- */
.bb-main {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 24px 32px;
  transition: background .2s, border-color .2s;
}

/* --- Toggle switch --- */
.bb-toggle-wrap { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.bb-toggle { position: relative; width: 36px; height: 18px; cursor: pointer; flex-shrink: 0; }
.bb-toggle input { opacity: 0; width: 0; height: 0; }
.bb-toggle-slider {
  position: absolute; inset: 0;
  background: var(--border);
  border-radius: 18px;
  transition: .2s;
}
.bb-toggle-slider::before {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: .2s;
}
.bb-toggle input:checked + .bb-toggle-slider { background: var(--accent); }
.bb-toggle input:checked + .bb-toggle-slider::before { transform: translateX(18px); }

/* --- Infobox (Wikipedia stil) --- */
.bb-infobox {
  float: right;
  clear: right;
  margin: 0 0 16px 24px;
  background: var(--toc-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 12px;
  width: 220px;
}
.bb-infobox-title {
  background: var(--infobox-head);
  text-align: center;
  font-weight: bold;
  padding: 4px 8px;
  font-size: 13px;
}
.bb-infobox table { width: 100%; border-collapse: collapse; }
.bb-infobox td { padding: 3px 8px; vertical-align: top; }
.bb-infobox td:first-child { font-weight: bold; color: var(--text-muted); width: 80px; }
.bb-infobox tr { border-bottom: 1px solid var(--border-light); }
.bb-infobox tr:last-child { border-bottom: none; }

/* --- Badge --- */
.bb-badge {
  display: inline-block;
  background: var(--badge-bg);
  color: var(--text-muted);
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 1px 6px;
  border-radius: 2px;
  border: 1px solid var(--border-light);
}
.bb-badge-coming-soon {
  background: none;
  color: var(--text-light);
  border-color: var(--border-light);
  font-style: italic;
}

/* --- Buttons --- */
.bb-btn {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 3px;
  border: 1px solid var(--border);
  font-size: 13px;
  cursor: pointer;
  background: var(--surface);
  color: var(--text);
  transition: background .15s;
  text-decoration: none;
}
.bb-btn:hover { background: var(--border-light); text-decoration: none; }
.bb-btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.bb-btn-primary:hover { opacity: 0.9; background: var(--accent); color: #fff; }
.bb-btn-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* --- Hero (landing page) --- */
.bb-hero {
  text-align: center;
  padding: 56px 24px 48px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 40px;
}
.bb-hero-logo {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: bold;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -1px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.bb-hero-icon { width: 64px; height: 64px; flex-shrink: 0; }
.bb-hero-logo span { color: var(--accent); }
.bb-hero-lab {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.bb-hero-tagline {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
  font-style: italic;
}
.bb-hero-desc {
  max-width: 680px;
  margin: 0 auto 36px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  font-family: var(--font-serif);
}
.bb-hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* --- Cards (books.html) --- */
.bb-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}
.bb-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
  transition: box-shadow .15s, background .2s;
}
.bb-card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.12); }
.bb-card-head {
  background: var(--toc-bg);
  border-bottom: 1px solid var(--border);
  padding: 10px 14px;
}
.bb-card-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: bold;
  color: var(--text);
  margin-bottom: 2px;
}
.bb-card-author { font-size: 12px; color: var(--text-muted); }
.bb-card-body { padding: 12px 14px; }
.bb-card-meta { font-size: 12px; color: var(--text-light); margin-bottom: 10px; }
.bb-card-langs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 14px;
}
.bb-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-top: 1px solid var(--border-light);
  padding-top: 10px;
}

/* --- Section headings --- */
.bb-section-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: normal;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  margin-bottom: 16px;
  color: var(--text);
}
.bb-section-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: -12px;
  margin-bottom: 20px;
}

/* --- Prose (about.html) --- */
.bb-prose {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  max-width: 760px;
}
.bb-prose h2 {
  font-size: 20px;
  font-weight: normal;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 3px;
  margin: 28px 0 12px;
}
.bb-prose h3 {
  font-size: 16px;
  font-weight: bold;
  margin: 20px 0 8px;
}
.bb-prose p { margin-bottom: 12px; }
.bb-prose code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--toc-bg);
  border: 1px solid var(--border-light);
  padding: 0 4px;
  border-radius: 2px;
}
.bb-prose pre {
  background: var(--toc-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 12px 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}
.bb-prose pre code { background: none; border: none; padding: 0; }
.bb-prose table { border-collapse: collapse; width: 100%; margin-bottom: 16px; font-size: 14px; }
.bb-prose th { background: var(--toc-bg); text-align: left; padding: 6px 10px; border: 1px solid var(--border); }
.bb-prose td { padding: 5px 10px; border: 1px solid var(--border-light); }

/* --- Stats (stats.html) --- */
.bb-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.bb-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 16px;
  text-align: center;
}
.bb-stat-number {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: bold;
  color: var(--accent);
  line-height: 1.1;
}
.bb-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --- Corpus funnel (home) --- */
.bb-funnel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 24px 20px 20px;
  margin-bottom: 28px;
}
.bb-funnel-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 18px;
}
.bb-funnel-row {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.bb-funnel-step {
  flex: 1 1 200px;
  text-align: center;
  padding: 8px 6px;
}
.bb-funnel-num {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: bold;
  color: var(--accent);
  line-height: 1.05;
}
.bb-funnel-cap {
  font-size: 13px;
  color: var(--text);
  margin-top: 6px;
  font-weight: 600;
}
.bb-funnel-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.4;
}
.bb-funnel-arrow {
  display: flex;
  align-items: center;
  font-size: 28px;
  color: var(--border);
  font-weight: bold;
  padding: 0 2px;
}
.bb-funnel-foot {
  text-align: center;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--text-muted);
}
.bb-funnel-foot strong {
  color: var(--accent);
  font-family: var(--font-serif);
  font-size: 18px;
}
@media (max-width: 640px) {
  .bb-funnel-arrow { transform: rotate(90deg); padding: 4px 0; }
  .bb-funnel-step { flex-basis: 100%; }
}

/* --- Loading / empty states --- */
.bb-loading {
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
  font-size: 16px;
}


/* --- Key Concepts --- */
#bb-key-concepts {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px 32px;
}
.bb-concepts-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-bottom: 16px;
}
.bb-concepts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 10px;
}
.bb-concept-card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
}
.bb-concept-icon { font-size: 18px; flex-shrink: 0; margin-top: 2px; }
.bb-concept-body { display: flex; flex-direction: column; gap: 4px; }
.bb-concept-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--link);
  text-decoration: none;
}
.bb-concept-name:hover { text-decoration: underline; color: var(--link-hover); }
.bb-concept-desc { font-size: 12px; color: var(--text-muted); line-height: 1.5; }

/* --- Responsive --- */
@media (max-width: 700px) {
  .bb-layout-sidebar { grid-template-columns: 1fr; }
  #about-layout { grid-template-columns: 1fr !important; }
  .bb-prose table { display: block; overflow-x: auto; }
  .bb-main { padding: 16px; }
  .bb-hero-logo { font-size: 36px; }
  .bb-hero { padding: 32px 16px 28px; }
  #bb-nav { display: none; }
  #bb-burger { display: block; padding: 4px 12px; font-size: 20px; }
  #bb-logo { font-size: 17px; margin-right: 8px; }
  #bb-lang-select { font-size: 11px; }
  #bb-header-controls { gap: 5px; }
  #bb-header-inner { padding: 0 8px; }
  #bb-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 8px 16px;
    gap: 4px;
  }
  #bb-nav.open .bb-nav-link { padding: 10px 12px; font-size: 15px; }
  #bb-header-inner { position: relative; }
}