/* ══════════════════════════════════════════════════════
   NAV ENGINE — Unified Navigation for Standard Works
   ══════════════════════════════════════════════════════ */

/* ── Overlay ── */
#nav-overlay {
  display: none; position: fixed; inset: 0; z-index: 5000;
  background: rgba(0,0,0,0.5); backdrop-filter: blur(2px);
  opacity: 0; transition: opacity 0.25s ease;
}
#nav-overlay.open { display: block; opacity: 1; }

/* ── Sidebar Panel ── */
#nav-sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 5001;
  width: 360px; max-width: 90vw;
  background: #1a1a1a; color: #e8e2d4;
  transform: translateX(-100%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex; flex-direction: column;
  font-family: 'David Libre', 'Georgia', serif;
  border-right: 1px solid #333;
  box-shadow: 4px 0 24px rgba(0,0,0,0.4);
  overflow: hidden;
}
#nav-sidebar.open { transform: translateX(0); }

/* ── Search Bar ── */
.nav-search-wrap {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; border-bottom: 1px solid #2a2a2a;
  background: #151515; flex-shrink: 0;
}
.nav-search-wrap input {
  flex: 1; background: #222; border: 1px solid #333; border-radius: 6px;
  padding: 8px 12px; color: #e8e2d4; font-size: 0.95em;
  font-family: 'David Libre', serif;
  outline: none; transition: border-color 0.2s;
}
.nav-search-wrap input::placeholder { color: #666; }
.nav-search-wrap input:focus { border-color: #c8a84e; }
.nav-icon-btn {
  background: none; border: none; color: #888; font-size: 1.15em;
  cursor: pointer; padding: 4px 6px; line-height: 1;
}
.nav-icon-btn:hover { color: #e8e2d4; }
.nav-close-btn {
  background: none; border: none; color: #888; font-size: 1.4em;
  cursor: pointer; padding: 4px 8px; line-height: 1;
}
.nav-close-btn:hover { color: #e8e2d4; }

/* ── Footer: bookmarks ── */
.nf-bm {
  border: 1px solid #333;
  border-radius: 8px;
  padding: 10px 10px;
  margin-top: 8px;
  background: rgba(255,255,255,0.03);
  cursor: pointer;
}
.nf-bm:hover { border-color: rgba(200,168,78,0.65); background: rgba(200,168,78,0.08); }
.nf-bm-title { font-size: 0.95em; color: #e8e2d4; }
.nf-bm-heb { font-family: 'SBL Hebrew','David Libre',serif; font-size: 1.05em; color: #c8a84e; margin-top: 2px; }

/* ── Search Results ── */
.nav-search-results {
  display: none; background: #1e1e1e; border-bottom: 1px solid #2a2a2a;
  max-height: 280px; overflow-y: auto; flex-shrink: 0;
}
.nav-search-results.open { display: block; }
.nav-search-result {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 16px; cursor: pointer; border-bottom: 1px solid #222;
  transition: background 0.15s;
}
.nav-search-result:hover, .nav-search-result.active { background: rgba(200,168,78,0.12); }
.nav-search-result .sr-name { font-size: 0.95em; }
.nav-search-result .sr-heb { font-family: 'SBL Hebrew','David Libre',serif; font-size: 1em; color: #c8a84e; }
.nav-search-result .sr-vol { font-size: 0.75em; color: #888; margin-left: 8px; }

/* ── Volume Tabs ── */
.nav-vol-tabs {
  display: flex; flex-shrink: 0;
  border-bottom: 1px solid #2a2a2a; background: #151515;
}
.nav-vol-tab {
  flex: 1; text-align: center; padding: 10px 4px 8px; cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: background 0.15s, border-color 0.2s;
  min-width: 0;
}
.nav-vol-tab:hover { background: rgba(200,168,78,0.08); }
.nav-vol-tab.active {
  border-bottom-color: #c8a84e;
  background: rgba(200,168,78,0.1);
}
.nav-vol-tab .vt-heb {
  display: block; font-family: 'SBL Hebrew','David Libre',serif;
  font-size: 0.85em; color: #c8a84e; line-height: 1.2;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nav-vol-tab .vt-en {
  display: block; font-size: 0.6em; color: #888; margin-top: 2px;
  text-transform: uppercase; letter-spacing: 0.05em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nav-vol-tab.active .vt-heb { color: #e8c860; }
.nav-vol-tab.active .vt-en { color: #c8a84e; }

/* ── Library view ── */
.nav-library { flex: 1; overflow-y: auto; padding: 12px 16px 16px; }
.nl-sec-title {
  font-size: 0.72em; color: #888; text-transform: uppercase;
  letter-spacing: 0.12em; font-weight: 700; margin: 6px 0 10px;
}
.nl-card {
  border: 1px solid #333; border-radius: 10px; padding: 12px;
  background: rgba(255,255,255,0.03); cursor: pointer;
}
.nl-card:hover { border-color: rgba(200,168,78,0.65); background: rgba(200,168,78,0.08); }
.nl-card-title { font-size: 0.8em; color: #888; text-transform: uppercase; letter-spacing: 0.12em; font-weight: 700; }
.nl-card-text { color: #e8e2d4; font-size: 1.05em; margin-top: 6px; }
.nl-card-heb { color: #c8a84e; font-family: 'SBL Hebrew','David Libre',serif; font-size: 1.2em; margin-top: 4px; }
.nl-bm-list { display: grid; gap: 8px; }
.nl-bm { border: 1px solid #333; border-radius: 10px; padding: 10px; background: rgba(255,255,255,0.02); cursor: pointer; }
.nl-bm:hover { border-color: rgba(200,168,78,0.65); background: rgba(200,168,78,0.08); }
.nl-bm-title { color: #e8e2d4; font-size: 0.95em; }
.nl-bm-heb { color: #c8a84e; font-family: 'SBL Hebrew','David Libre',serif; font-size: 1.1em; margin-top: 2px; }
.nl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.nl-tile {
  border: 1px solid #333; border-radius: 12px; padding: 12px;
  background: rgba(255,255,255,0.02); cursor: pointer;
}
.nl-tile:hover { border-color: rgba(200,168,78,0.65); background: rgba(200,168,78,0.08); }
.nl-top { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.nl-abbr { color: #c8a84e; font-weight: 700; letter-spacing: 0.08em; }
.nl-name { color: #e8e2d4; font-size: 0.95em; opacity: 0.95; }
.nl-sub { margin-top: 6px; font-size: 0.8em; color: #888; }

/* ── Book List (scrollable area) ── */
.nav-book-list {
  flex: 1; overflow-y: auto; overflow-x: hidden;
  padding: 8px 0;
  scrollbar-width: thin; scrollbar-color: #444 #1a1a1a;
}
.nav-book-list::-webkit-scrollbar { width: 6px; }
.nav-book-list::-webkit-scrollbar-track { background: #1a1a1a; }
.nav-book-list::-webkit-scrollbar-thumb { background: #444; border-radius: 3px; }

/* ── Footer tools (Export/Import) ── */
.nav-footer {
  padding: 10px 16px;
  border-top: 1px solid #2a2a2a;
  background: #151515;
  flex-shrink: 0;
}
.nav-footer .nf-title {
  font-size: 0.7em;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  margin-bottom: 8px;
}
.nav-footer .nf-row { display: flex; gap: 8px; flex-wrap: wrap; }
.nav-footer button {
  flex: 1;
  min-width: 120px;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid #333;
  background: #222;
  color: #e8e2d4;
  cursor: pointer;
  font-family: 'David Libre', serif;
  font-size: 0.9em;
}
.nav-footer button:hover { border-color: #c8a84e; background: rgba(200,168,78,0.12); }
.nav-footer .nf-hint { margin-top: 8px; font-size: 0.75em; color: #777; line-height: 1.35; }

/* ── Division Headers ── */
.nav-division {
  padding: 12px 16px 4px; font-size: 0.72em; color: #888;
  text-transform: uppercase; letter-spacing: 0.1em;
  font-weight: 600; border-top: 1px solid #2a2a2a; margin-top: 4px;
}
.nav-division:first-child { border-top: none; margin-top: 0; }

/* ── Book Row ── */
.nav-book-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 16px; cursor: pointer;
  transition: background 0.15s;
}
.nav-book-row:hover { background: rgba(200,168,78,0.08); }
.nav-book-row.expanded { background: rgba(200,168,78,0.06); }
.nav-book-row.nav-focus-row {
  background: rgba(200,168,78,0.10);
  border-bottom: 1px solid rgba(200,168,78,0.20);
}
.nav-book-row.nav-focus-row:hover { background: rgba(200,168,78,0.16); }
.nav-book-row .nb-heb {
  font-family: 'SBL Hebrew','David Libre',serif; font-size: 1em;
  color: #c8a84e; direction: rtl;
}
.nav-book-row .nb-en { font-size: 0.88em; color: #bbb; }
.nav-book-row .nb-ch {
  font-size: 0.7em; color: #666; margin-left: 6px; white-space: nowrap;
}
.nav-book-row .nb-arrow {
  font-size: 0.7em; color: #666; transition: transform 0.2s; margin-right: 4px;
}
.nav-book-row.expanded .nb-arrow { transform: rotate(90deg); }
.nav-book-row.single-ch { cursor: pointer; }

/* ── Chapter Grid ── */
.nav-ch-grid {
  display: none; grid-template-columns: repeat(7, 1fr); gap: 4px;
  padding: 6px 16px 10px; background: rgba(0,0,0,0.15);
}
.nav-ch-grid.open { display: grid; }
.nav-ch-cell {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 6px 2px; border-radius: 4px; cursor: pointer;
  background: #252525; border: 1px solid #333;
  transition: background 0.15s, border-color 0.15s;
  min-height: 38px;
}
.nav-ch-cell:hover { background: rgba(200,168,78,0.15); border-color: #c8a84e; }
.nav-ch-cell.current {
  background: rgba(200,168,78,0.25); border-color: #c8a84e;
}
.nav-ch-cell .ch-heb {
  font-family: 'SBL Hebrew','David Libre',serif; font-size: 0.85em;
  color: #c8a84e; line-height: 1.1;
}
.nav-ch-cell .ch-num { font-size: 0.65em; color: #888; }
.nav-ch-cell.current .ch-heb { color: #e8c860; }
.nav-ch-cell.current .ch-num { color: #c8a84e; }

/* ── Breadcrumb ── */
#nav-breadcrumb {
  position: fixed; top: 70px; left: 0; right: 0; z-index: 99;
  font-family: 'David Libre', serif; font-size: 0.78em;
  color: rgba(30, 34, 51, 0.75);
  padding: 6px 16px;
  border-bottom: 1px solid rgba(200,168,78,0.18);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  background: rgba(250, 248, 242, 0.92);
  backdrop-filter: blur(6px);
  display: none;
  direction: ltr;
}
#nav-breadcrumb.visible { display: block; }
/* Page padding is set dynamically by nav_engine.js when breadcrumb is visible */
#nav-breadcrumb span { cursor: pointer; transition: color 0.15s; }
#nav-breadcrumb span:hover { color: #c8a84e; }
#nav-breadcrumb .bc-sep { color: #bbb; margin: 0 6px; cursor: default; }
body.dark-mode #nav-breadcrumb {
  background: rgba(18, 20, 28, 0.92);
  color: rgba(232, 226, 212, 0.82);
}
body.dark-mode #nav-breadcrumb .bc-sep { color: rgba(232, 226, 212, 0.35); }

/* ── Continue Reading Card (index.html) ── */
.continue-reading {
  background: rgba(200,168,78,0.08); border: 1px solid rgba(200,168,78,0.25);
  border-radius: 8px; padding: 16px 20px; margin: 16px auto;
  max-width: 600px; cursor: pointer; transition: background 0.2s;
  font-family: 'David Libre', serif; text-align: center;
}
.continue-reading:hover { background: rgba(200,168,78,0.15); }
.continue-reading .cr-label { font-size: 0.8em; color: #888; text-transform: uppercase; letter-spacing: 0.1em; }
.continue-reading .cr-ref { font-size: 1.15em; color: rgba(30, 34, 51, 0.88); margin-top: 4px; font-weight: 650; }
.continue-reading .cr-heb { font-family: 'SBL Hebrew','David Libre',serif; font-size: 1.1em; color: #c8a84e; }
body.dark-mode .continue-reading .cr-ref { color: rgba(232, 226, 212, 0.92); }

/* ── Mobile ── */
@media (max-width: 600px) {
  #nav-sidebar { width: 90vw; }
  .nav-ch-grid { grid-template-columns: repeat(5, 1fr); gap: 5px; }
  .nav-ch-cell { min-height: 44px; padding: 8px 2px; }
  .nav-book-row { padding: 10px 16px; }
  .nav-vol-tab { padding: 8px 2px 6px; }
  .nav-vol-tab .vt-heb { font-size: 0.8em; }
  .nav-vol-tab .vt-en { font-size: 0.55em; }
  #nav-breadcrumb { font-size: 0.72em; padding: 3px 12px; }
}

/* ── Mobile nav bar padding fix ── */
/* On small screens the controls-top wraps to 2+ rows (~100px). */
@media (max-width: 600px) {
  .page { padding-top: 130px !important; }
}

/* ── Swipe hint (first visit) ── */
.nav-swipe-hint {
  position: fixed; left: 0; top: 50%; transform: translateY(-50%);
  width: 4px; height: 60px; background: rgba(200,168,78,0.3);
  border-radius: 0 4px 4px 0; z-index: 998;
  animation: swipeHintPulse 2s ease-in-out infinite;
  pointer-events: none;
}
@keyframes swipeHintPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.7; width: 6px; }
}