/* ==========================================================================
   SCIENTIFIC ARCHIVAL RESEARCH TERMINAL - CLASSIFIED DOCUMENT THEME
   Aesthetic: Off-white canvas, absolute black typography, stark monospace telemetry,
   instantaneous mechanical interactions, strict geometric alignment, zero emojis.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;0,8..60,700;1,8..60,400&display=swap');

:root {
  --bg-canvas: #f6f3eb;
  --bg-panel: #fcfbfa;
  --bg-inset: #ede9de;
  --bg-subtle: #ece8dc;
  
  --ink-primary: #000000;
  --ink-secondary: #222222;
  --ink-muted: #555555;
  --ink-faint: #888888;
  --ink-inverse: #ffffff;
  
  --border-stark: #000000;
  --border-thin: #333333;
  --border-faint: #b0aaa0;

  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-mono: 'IBM Plex Mono', 'SF Mono', 'Courier Prime', Menlo, Consolas, monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: none !important; /* Strict mechanical responsiveness: no slow fades */
}

html {
  font-size: 15px;
  background-color: var(--bg-canvas);
  color: var(--ink-primary);
}

body {
  font-family: var(--font-serif);
  line-height: 1.5;
  min-height: 100vh;
  background-color: var(--bg-canvas);
  background-image: 
    linear-gradient(to right, rgba(0, 0, 0, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink-primary);
  display: flex;
  flex-direction: column;
}

/* Monospace Utilities */
.mono {
  font-family: var(--font-mono);
}

/* Main Container Layout */
.terminal-wrapper {
  max-width: 1380px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 2rem 4rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Screen Transitions */
.screen-view.hidden {
  display: none !important;
}

/* Header & Telemetry */
.archive-topbar {
  border: 2px solid var(--border-stark);
  background-color: var(--bg-panel);
  margin-bottom: 2rem;
  box-shadow: 4px 4px 0px rgba(0, 0, 0, 0.9);
}

.topbar-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0.8rem;
  background-color: var(--ink-primary);
  color: var(--ink-inverse);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.badge-classified {
  background-color: #ffffff;
  color: #000000;
  padding: 0.1rem 0.4rem;
  font-weight: 700;
  margin-right: 0.5rem;
}

.topbar-status-ticker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #ffffff;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.telemetry-header-panel {
  padding: 0.6rem 1rem;
  border-bottom: 2px solid var(--border-stark);
  background-color: var(--bg-inset);
}

.telemetry-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-bottom: 0.35rem;
}

.telemetry-label {
  font-weight: 700;
  letter-spacing: 0.04em;
}

.telemetry-stats {
  display: flex;
  gap: 1.5rem;
}

.stat-group {
  display: flex;
  gap: 0.4rem;
}

.stat-group .k {
  color: var(--ink-muted);
}

.stat-group .v {
  font-weight: 700;
}

/* Mechanical Hatch Storage Gauge */
.storage-gauge-track {
  height: 12px;
  background: var(--bg-panel);
  border: 1px solid var(--border-stark);
  position: relative;
  overflow: hidden;
}

.storage-gauge-fill {
  height: 100%;
  background-color: #000000;
  background-image: repeating-linear-gradient(
    45deg,
    #000000,
    #000000 4px,
    #ffffff 4px,
    #ffffff 6px
  );
  width: 0%;
}

.storage-gauge-markers {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.storage-gauge-markers span {
  width: 1px;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.4);
}

/* Main Top Header */
.header-main {
  padding: 1.2rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-panel);
}

.app-title-area h1 {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.app-title-area .subtitle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

.header-actions {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

/* Mechanical Buttons */
.btn-mech {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.45rem 0.85rem;
  background-color: var(--bg-panel);
  color: var(--ink-primary);
  border: 2px solid var(--border-stark);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn-mech:hover {
  background-color: var(--ink-primary);
  color: var(--ink-inverse);
}

.btn-mech.primary {
  background-color: var(--ink-primary);
  color: var(--ink-inverse);
}

.btn-mech.primary:hover {
  background-color: #333333;
}

/* Monospace Keyboard Shortcut Badges */
.kbd-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.05rem 0.3rem;
  border: 1px solid currentColor;
  margin-right: 0.3rem;
  display: inline-block;
  vertical-align: baseline;
  line-height: 1;
}

/* Ingestion Dropzone Panel */
.ingestion-panel {
  border: 2px solid var(--border-stark);
  background-color: var(--bg-panel);
  margin-bottom: 2rem;
}

.panel-header {
  padding: 0.5rem 0.8rem;
  background-color: var(--bg-inset);
  border-bottom: 1px solid var(--border-stark);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dropzone-area {
  padding: 2rem 1.5rem;
  text-align: center;
  border: 2px dashed var(--border-stark);
  margin: 1rem;
  background-color: var(--bg-canvas);
  cursor: pointer;
  position: relative;
}

.dropzone-area:hover,
.dropzone-area.dragover {
  background-color: #eae4d4;
  border-style: solid;
}

.dropzone-crosshairs {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 14px;
  height: 14px;
  border-top: 2px solid #000;
  border-right: 2px solid #000;
}

.dropzone-text-main {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
}

.dropzone-text-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}

.ingestion-file-list {
  padding: 0 1rem 1rem;
}

.ingest-item {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border-thin);
  background: var(--bg-canvas);
  margin-bottom: 0.4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Visualizations Grid */
.analytics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 900px) {
  .analytics-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  border: 2px solid var(--border-stark);
  background-color: var(--bg-panel);
}

.chart-body {
  padding: 1rem;
}

.chart-canvas-container {
  width: 100%;
  height: 180px;
  position: relative;
}

.chart-canvas-container canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.chart-legend {
  display: flex;
  gap: 1.2rem;
  margin-top: 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--border-faint);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-box {
  width: 12px;
  height: 12px;
  border: 1px solid #000;
}

.legend-box.hatch {
  background: repeating-linear-gradient(45deg, #000, #000 2px, #fff 2px, #fff 4px);
}
.legend-box.grid {
  background: radial-gradient(#000 1.5px, transparent 1.5px);
  background-size: 4px 4px;
}
.legend-box.solid {
  background-color: #000000;
}

/* Category Tabs & Header Actions */
.category-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
}

.category-tab-group {
  display: flex;
  gap: 0.4rem;
}

.category-tab-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.5rem 0.9rem;
  border: 2px solid var(--border-stark);
  background: var(--bg-panel);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
}

.category-tab-btn:hover {
  background: #333;
  color: #fff;
}

.category-tab-btn.active {
  background: var(--ink-primary);
  color: var(--ink-inverse);
}

.chart-ctrl-group {
  display: flex;
  gap: 0.3rem;
  align-items: center;
}

.chart-pill-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--border-stark);
  background: var(--bg-panel);
  cursor: pointer;
  color: var(--ink-muted);
}

.chart-pill-btn:hover {
  background: #444;
  color: #fff;
}

.chart-pill-btn.active {
  background: var(--ink-primary);
  color: var(--ink-inverse);
  font-weight: 700;
}

/* Registry Panel & Filter Toolbar */
.registry-panel {
  border: 2px solid var(--border-stark);
  background-color: var(--bg-panel);
}

.filter-toolbar {
  padding: 0.8rem 1rem;
  border-bottom: 2px solid var(--border-stark);
  background-color: var(--bg-inset);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.status-filter-pills {
  display: flex;
  gap: 0.4rem;
}

.filter-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border-stark);
  background: var(--bg-panel);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.filter-pill:hover {
  background: #000;
  color: #fff;
}

.filter-pill.active {
  background: var(--ink-primary);
  color: var(--ink-inverse);
}

.search-sort-controls {
  display: flex;
  gap: 0.6rem;
}

.input-mech {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border-stark);
  background: var(--bg-panel);
  color: var(--ink-primary);
}

.input-mech:focus {
  outline: 2px solid #000000;
  background: #ffffff;
}

/* Bulk Selection Bar */
.bulk-selection-bar {
  padding: 0.5rem 1rem;
  background: #000000;
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  display: none;
  justify-content: space-between;
  align-items: center;
}

.bulk-selection-bar.visible {
  display: flex;
}

/* Registry Table Layout & Strict Alignment */
.registry-table-container {
  overflow-x: auto;
}

.registry-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.registry-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.6rem 0.8rem;
  border-bottom: 2px solid var(--border-stark);
  background-color: var(--bg-panel);
}

.registry-table td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--border-faint);
  font-size: 0.92rem;
  vertical-align: middle;
}

.registry-table tbody tr:hover {
  background-color: #f0ebe0;
}

.registry-table tbody tr.row-focused {
  background-color: #ede8dc !important;
  outline: 2px solid #000000;
  outline-offset: -2px;
}

.row-confidential {
  background: repeating-linear-gradient(
    45deg,
    #e8e6e1,
    #e8e6e1 10px,
    #dedbd4 10px,
    #dedbd4 20px
  ) !important;
  border-left: 4px solid #444444;
}

.row-confidential:hover {
  background: repeating-linear-gradient(
    45deg,
    #dedbd4,
    #dedbd4 10px,
    #d4d0c7 10px,
    #d4d0c7 20px
  ) !important;
}

.row-confidential.row-focused {
  background: repeating-linear-gradient(
    45deg,
    #d4d0c7,
    #d4d0c7 10px,
    #cac5ba 10px,
    #cac5ba 20px
  ) !important;
  outline: 2px solid #000000;
}

.flag-toggle-card {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.8rem;
  background: var(--bg-inset);
  border: 1px solid var(--border-stark);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
  height: 100%;
  box-sizing: border-box;
}

.flag-toggle-card input[type="checkbox"] {
  width: auto;
  margin: 0;
  cursor: pointer;
}

.flag-toggle-card.incomplete {
  color: #900;
  border-color: #c00;
  background: #fff8f8;
}

.version-payload-card {
  background: var(--bg-inset);
  border: 1px solid var(--border-stark);
  padding: 0.65rem 0.85rem;
  box-sizing: border-box;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 0.2rem;
}

.version-primary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  width: 100%;
}

.version-history-container {
  border-top: 1px dashed var(--border-faint);
  padding-top: 0.5rem;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  box-sizing: border-box;
}

.version-pills-list {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 0.4rem;
}

.version-pill-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-stark);
  padding: 0.2rem 0.45rem;
  font-size: 0.68rem;
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-sizing: border-box;
}

.version-dl-link {
  text-decoration: none;
  color: var(--ink-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 600;
}

.version-dl-link:hover {
  text-decoration: underline;
}

.version-del-btn {
  background: transparent;
  border: none;
  border-left: 1px solid var(--border-stark);
  color: #888888;
  cursor: pointer;
  padding: 0 0.1rem 0 0.4rem;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  transition: color 0.15s ease;
}

.version-del-btn:hover {
  color: #c00000;
}

.row-cursor-indicator {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #000000;
  display: inline-block;
  margin-right: 0.2rem;
  visibility: hidden;
}

.row-focused .row-cursor-indicator {
  visibility: visible;
}

.book-title-cell a {
  color: var(--ink-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
}

.book-title-cell a:hover {
  text-decoration: underline;
}

.book-meta-subline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Badges */
.badge-format {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.05rem 0.35rem;
  border: 1px solid var(--border-stark);
  background: var(--bg-inset);
  color: var(--ink-primary);
  display: inline-block;
  letter-spacing: 0.04em;
}

.incomplete-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: #900;
  border: 1px solid #900;
  background: #fff0f0;
  padding: 0.05rem 0.3rem;
  margin-left: 0.4rem;
}

/* 3-Way Segmented Reading Status Toggle */
.segmented-status-toggle {
  display: inline-flex;
  border: 1px solid var(--border-stark);
  background: var(--bg-panel);
}

.seg-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.25rem 0.45rem;
  border: none;
  border-right: 1px solid var(--border-stark);
  background: transparent;
  cursor: pointer;
  color: var(--ink-muted);
}

.seg-btn:last-child {
  border-right: none;
}

.seg-btn:hover {
  background: #333;
  color: #fff;
}

.seg-btn.active {
  background: var(--ink-primary);
  color: var(--ink-inverse);
}

/* Action Button Group */
.action-btn-group {
  display: inline-flex;
  gap: 0.25rem;
}

.btn-icon {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--border-stark);
  background: var(--bg-panel);
  color: var(--ink-primary);
  cursor: pointer;
  text-decoration: none;
}

.btn-icon:hover {
  background: var(--ink-primary);
  color: var(--ink-inverse);
}

/* ==========================================================================
   DEDICATED DIRECTORY & TAXONOMY WORKSPACE SCREEN
   ========================================================================== */
.directory-workspace-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1.5rem;
}

.dir-sidebar {
  border: 2px solid var(--border-stark);
  background: var(--bg-panel);
  display: flex;
  flex-direction: column;
}

.dir-sidebar-header {
  padding: 0.6rem 0.8rem;
  background: var(--ink-primary);
  color: var(--ink-inverse);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dir-tree-list {
  list-style: none;
  padding: 0.4rem 0;
  overflow-y: auto;
  max-height: 650px;
}

.dir-tree-item {
  padding: 0.5rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-faint);
}

.dir-tree-item:hover {
  background: #000000;
  color: #ffffff;
}

.dir-tree-item.active {
  background: var(--ink-primary);
  color: var(--ink-inverse);
  font-weight: 700;
  border-left: 4px solid #fff;
}

.dir-main-pane {
  display: flex;
  flex-direction: column;
}

.dir-breadcrumb-banner {
  padding: 0.7rem 1rem;
  background: var(--bg-inset);
  border: 2px solid var(--border-stark);
  margin-bottom: 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   REDESIGNED DOCUMENT READER & COMFORT CONTROLS
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 1.5rem;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-box {
  width: 100%;
  max-width: 820px;
  max-height: 90vh;
  background: var(--bg-panel);
  border: 3px solid var(--border-stark);
  display: flex;
  flex-direction: column;
  box-shadow: 12px 12px 0px rgba(0, 0, 0, 0.9);
  overflow: hidden;
  box-sizing: border-box;
}

.modal-box form {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 1rem;
  background: var(--ink-primary);
  color: var(--ink-inverse);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.modal-close-btn {
  background: transparent;
  color: #fff;
  border: 1px solid #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
}
.modal-close-btn:hover {
  background: #fff;
  color: #000;
}

.modal-header .btn-mech {
  background: transparent !important;
  color: #ffffff !important;
  border: 1px solid #ffffff !important;
}
.modal-header .btn-mech:hover {
  background: #ffffff !important;
  color: #000000 !important;
}


.modal-content-area {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
  box-sizing: border-box;
}

.modal-footer {
  padding: 0.8rem 1.5rem;
  border-top: 2px solid var(--border-stark);
  background: var(--bg-inset);
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
  flex-shrink: 0;
}

/* Reader Modal Specifics */
.reader-modal-box {
  max-width: 1350px;
  width: 96vw;
  height: 92vh;
  padding: 0;
}

.reader-toolbar {
  padding: 0.45rem 1rem;
  background: var(--bg-inset);
  border-bottom: 2px solid var(--border-stark);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.reader-ctrl-group {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.reader-ctrl-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.2rem 0.45rem;
  border: 1px solid var(--border-stark);
  background: var(--bg-panel);
  cursor: pointer;
  color: var(--ink-primary);
  display: inline-flex;
  align-items: center;
}

.reader-ctrl-btn:hover {
  background: var(--ink-primary);
  color: var(--ink-inverse);
}

.reader-ctrl-btn.active {
  background: var(--ink-primary);
  color: var(--ink-inverse);
  font-weight: 700;
}

.reader-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* TOC Sidebar */
.reader-toc-sidebar {
  width: 320px;
  min-width: 270px;
  border-right: 2px solid var(--border-stark);
  background: var(--bg-canvas);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.reader-toc-sidebar.collapsed {
  display: none;
}

.toc-top {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border-stark);
  background: var(--bg-panel);
}

.toc-search-input {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border-stark);
  background: var(--bg-canvas);
}

.toc-list {
  flex: 1;
  overflow-y: auto;
  list-style: none;
}

.toc-item {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border-faint);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.82rem;
  background: var(--bg-panel);
}

.toc-item:hover {
  background: #000000;
  color: #ffffff;
}

.toc-item:hover .toc-words {
  color: #aaaaaa;
}

.toc-item.active {
  background: var(--ink-primary);
  color: var(--ink-inverse);
  font-weight: 700;
  border-left: 4px solid #fff;
}

.toc-words {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  white-space: nowrap;
}

/* Reader Main Content */
.reader-main-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  position: relative;
}

.reader-book-container {
  flex: 1;
  padding: 2.5rem 2rem 4rem;
  margin: 0 auto;
  width: 100%;
}

.reader-book-container.width-standard { max-width: 740px; }
.reader-book-container.width-wide { max-width: 980px; }
.reader-book-container.width-full { max-width: 1200px; }

/* Themes */
.reader-theme-archive {
  background-color: #f6f3eb !important;
  color: #000000 !important;
}
.reader-theme-night {
  background-color: #121212 !important;
  color: #e5e0d4 !important;
}
.reader-theme-night a { color: #ffffff !important; }
.reader-theme-sepia {
  background-color: #f4ecd8 !important;
  color: #2b2318 !important;
}

.reader-book-body {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.7;
}

.reader-book-body h1, .reader-book-body h2, .reader-book-body h3 {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 2rem 0 1rem;
  border-bottom: 2px solid currentColor;
  padding-bottom: 0.4rem;
}

.reader-book-body p {
  margin-bottom: 1.3rem;
  text-indent: 1.8rem;
}
.reader-book-body p:first-of-type, .reader-book-body p.first {
  text-indent: 0;
}

.reader-book-body blockquote {
  border-left: 3px solid currentColor;
  padding-left: 1.2rem;
  margin: 1.5rem 0;
  font-style: italic;
}

.reader-book-body code, .reader-book-body pre {
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.06);
  padding: 0.2rem 0.4rem;
  font-size: 0.88em;
}
.reader-theme-night .reader-book-body code, .reader-theme-night .reader-book-body pre {
  background: rgba(255, 255, 255, 0.1);
}

.pdf-page-marker {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-align: center;
  padding: 1.2rem 0 0.6rem;
  opacity: 0.6;
  border-top: 1px dashed currentColor;
  margin-top: 2rem;
}

.reader-bottom-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2.5rem;
  margin-top: 3rem;
  border-top: 2px solid currentColor;
}

.btn-chapter-nav {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.65rem 1.1rem;
  border: 2px solid currentColor;
  background: transparent;
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
}

.btn-chapter-nav:hover:not(:disabled) {
  background: #000000;
  color: #ffffff;
  border-color: #000000;
}
.reader-theme-night .btn-chapter-nav:hover:not(:disabled) {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}
.btn-chapter-nav:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

/* BibTeX & Code Blocks */
.bibtex-code-block {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  background: #181818;
  color: #e5e0d4;
  padding: 1.2rem;
  border: 2px solid #000;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  user-select: text;
}

/* Shortcuts Cheatsheet Table */
.shortcuts-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.shortcuts-table th, .shortcuts-table td {
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--border-stark);
  text-align: left;
}
.shortcuts-table th {
  background: var(--ink-primary);
  color: var(--ink-inverse);
}

/* Form Styles */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-full {
  grid-column: span 2;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.8rem;
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-field input,
.form-field textarea,
.form-field select {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  padding: 0.5rem;
  border: 1px solid var(--border-stark);
  background: var(--bg-canvas);
  color: var(--ink-primary);
  max-width: 100%;
  box-sizing: border-box;
}

.form-field input.mono,
.form-field select.mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.form-field textarea {
  min-height: 80px;
  resize: vertical;
  max-width: 100%;
  box-sizing: border-box;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border: 2px solid #000000;
  background: #ffffff;
}

/* Footer Telemetry Stamp */
.archive-footer {
  margin-top: 3rem;
  padding: 1rem 0;
  border-top: 2px solid var(--border-stark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
}

/* Access Clearance Gate Overlay */
.auth-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(246, 243, 235, 0.97);
  backdrop-filter: blur(5px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  padding: 1.5rem;
}

.auth-overlay.hidden {
  display: none;
}

.auth-card {
  width: 100%;
  max-width: 580px;
  background: var(--bg-panel);
  border: 3px solid var(--border-stark);
  box-shadow: 12px 12px 0px rgba(0, 0, 0, 0.9);
}

.auth-header {
  padding: 0.8rem 1.2rem;
  background: var(--ink-primary);
  color: var(--ink-inverse);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.auth-body {
  padding: 1.8rem;
}

.auth-key-dropzone {
  border: 2px dashed var(--border-stark);
  padding: 1.6rem 1rem;
  text-align: center;
  background: var(--bg-canvas);
  cursor: pointer;
  position: relative;
}

.auth-key-dropzone.dragover {
  background: #eae4d4;
  border-style: solid;
  border-width: 3px;
}

.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 1.4rem 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-faint);
}
.auth-divider span {
  padding: 0 0.8rem;
}

.auth-error {
  margin-top: 1rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid #900;
  background: #fff0f0;
  color: #900;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  display: none;
}
.auth-error.visible {
  display: block;
}