/**
 * CYBERPUNK HUD LAYOUT & NAVIGATION
 * Header HUD, Collapsible Sidebar, Main Reading Pane & Sticky Right Rail
 */

#app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* ================= TOP HUD HEADER ================= */
#cyber-header {
  height: 64px;
  background: var(--bg-panel);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-hud);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  cursor: pointer;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--primary);
  text-shadow: 0 0 10px var(--primary-glow);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-title .brand-accent {
  color: var(--secondary);
  text-shadow: 0 0 10px var(--secondary-glow);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-muted);
  letter-spacing: 1px;
}

#hud-status-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-hud);
  border-radius: 2px;
  color: var(--text-muted);
}

#hud-status-text .status-live {
  color: #00ff66;
  text-shadow: 0 0 8px #00ff66;
  margin-right: 4px;
}

#hud-status-text .status-err {
  color: #ff003c;
  margin-right: 4px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* THEME SELECTOR HUD */
.cyber-select-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.cyber-select {
  appearance: none;
  background: var(--bg-input);
  border: 1px solid var(--border-hud);
  color: var(--primary);
  font-family: var(--font-display);
  font-size: 11px;
  padding: 6px 28px 6px 12px;
  clip-path: var(--clip-chamfer-small);
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.cyber-select:hover, .cyber-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.cyber-select-wrapper .select-arrow {
  position: absolute;
  right: 10px;
  pointer-events: none;
  font-size: 8px;
  color: var(--primary);
}

/* ================= WORKSPACE BODY LAYOUT ================= */
#cyber-body {
  display: flex;
  flex: 1;
  position: relative;
}

/* SIDEBAR HUD */
#cyber-sidebar {
  width: 320px;
  min-width: 320px;
  height: calc(100vh - 64px);
  position: sticky;
  top: 64px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-hud);
  display: flex;
  flex-direction: column;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  z-index: 50;
}

#cyber-sidebar.closed {
  width: 0;
  min-width: 0;
  transform: translateX(-100%);
}

.sidebar-search-box {
  padding: 14px 16px 10px;
  position: relative;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input-wrapper .search-icon {
  position: absolute;
  left: 12px;
  color: var(--primary);
  pointer-events: none;
}

#nav-search-input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  background: var(--bg-input);
  border: 1px solid var(--border-hud);
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-size: 11px;
  clip-path: var(--clip-chamfer-small);
  outline: none;
  transition: all 0.2s;
}

#nav-search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
}

#nav-search-input::placeholder {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* SIDEBAR TABS */
.sidebar-tabs {
  display: flex;
  padding: 0 16px;
  border-bottom: 1px solid var(--border-hud);
  gap: 8px;
}

.sidebar-tab-btn {
  flex: 1;
  padding: 8px 4px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.sidebar-tab-btn:hover {
  color: var(--text-bright);
}

.sidebar-tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  text-shadow: 0 0 8px var(--primary-glow);
}

.sidebar-tree-controls {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tree-control-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  cursor: pointer;
  padding: 2px 4px;
}

.tree-control-btn:hover {
  color: var(--primary);
}

/* SIDEBAR TREE VIEW */
#sidebar-tree {
  flex: 1;
  overflow-y: auto;
  padding: 10px 8px;
}

.cyber-tree-root, .node-children {
  list-style: none;
}

.node-children {
  padding-left: 14px;
  border-left: 1px dashed rgba(0, 243, 255, 0.15);
  margin-left: 8px;
}

.cyber-tree-node.folder.collapsed > .node-children {
  display: none;
}

.cyber-tree-node.folder.collapsed > .node-row .folder-caret {
  transform: rotate(0deg);
}

.node-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  color: var(--text-main);
  text-decoration: none;
  border-radius: 2px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s, color 0.15s;
  user-select: none;
}

.node-row:hover {
  background: var(--primary-subtle);
  color: var(--text-bright);
}

.cyber-tree-node.active > .node-row {
  background: var(--primary-subtle);
  border-left: 2px solid var(--primary);
  color: var(--primary);
  font-weight: 700;
  text-shadow: 0 0 8px var(--primary-glow);
}

.folder-caret {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  transform: rotate(90deg);
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

/* CYBERPUNK VECTOR FOLDER ICONS */
.node-icon.folder-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  filter: drop-shadow(0 0 5px var(--primary-glow));
  transition: color 0.2s, filter 0.2s, transform 0.2s;
  flex-shrink: 0;
}

.node-row:hover .node-icon.folder-icon {
  color: var(--secondary);
  filter: drop-shadow(0 0 8px var(--secondary-glow));
  transform: scale(1.08);
}

.folder-svg-open {
  display: block;
}

.folder-svg-closed {
  display: none;
}

.cyber-tree-node.folder.collapsed > .node-row .folder-svg-open {
  display: none;
}

.cyber-tree-node.folder.collapsed > .node-row .folder-svg-closed {
  display: block;
}

.node-icon-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-muted);
  margin-right: 4px;
}

.cyber-tree-node.active .node-icon-dot {
  background: var(--primary);
  box-shadow: 0 0 6px var(--primary);
}

.node-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.node-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  padding: 1px 5px;
  border: 1px solid var(--border-hud);
  border-radius: 8px;
}

.node-direct-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  opacity: 0.35;
  padding: 2px 4px;
  border-radius: 2px;
  transition: opacity 0.2s, color 0.2s, background 0.2s;
  flex-shrink: 0;
}

.node-direct-link:hover {
  opacity: 1;
  color: var(--primary);
  background: var(--primary-subtle);
  box-shadow: 0 0 8px var(--primary-glow);
}

/* ================= MAIN READING VIEW ================= */
#cyber-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 24px 32px 80px;
  max-width: 1300px;
  margin: 0 auto;
}

#cyber-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 20px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.2);
  border-left: 2px solid var(--primary);
  width: fit-content;
}

.crumb-link {
  color: var(--primary);
  text-decoration: none;
}

.crumb-link:hover {
  text-decoration: underline;
}

.crumb-sep {
  opacity: 0.4;
}

.crumb-active {
  color: var(--text-bright);
}

/* DOCUMENT HEADER HUD CARD */
.doc-header-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hud);
  clip-path: var(--clip-chamfer);
  padding: 24px 28px;
  margin-bottom: 32px;
  position: relative;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.doc-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.doc-category-badge {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 4px 10px;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.doc-actions {
  display: flex;
  gap: 10px;
}

#doc-header-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--text-bright);
  text-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
  line-height: 1.3;
  margin-bottom: 12px;
}

.doc-metadata-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 12px;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* READING CONTENT CONTAINER */
.reading-layout-container {
  display: flex;
  gap: 40px;
  position: relative;
}

#doc-markdown-container {
  flex: 1;
  min-width: 0;
}

/* STICKY RIGHT RAIL TABLE OF CONTENTS */
#doc-toc-wrapper {
  width: 240px;
  min-width: 240px;
  position: sticky;
  top: 96px;
  height: fit-content;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  background: var(--bg-panel);
  border: 1px solid var(--border-hud);
  clip-path: var(--clip-chamfer-small);
  padding: 16px;
}

.toc-header {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--primary);
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-hud);
  padding-bottom: 6px;
}

#doc-toc-list {
  list-style: none;
}

.toc-item {
  margin-bottom: 6px;
}

.toc-item.level-3 {
  padding-left: 12px;
}

.toc-link {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: none;
  line-height: 1.4;
  transition: color 0.15s;
}

.toc-link:hover, .toc-link.active {
  color: var(--primary);
  text-shadow: 0 0 6px var(--primary-glow);
}

.toc-dot {
  font-size: 8px;
  opacity: 0.5;
}

.toc-link.active .toc-dot {
  color: var(--primary);
  opacity: 1;
}

/* ================= LOADING & ERROR SCREENS ================= */
.cyber-loading-screen {
  padding: 60px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.cyber-spinner {
  width: 50px;
  height: 50px;
  border: 2px solid var(--border-hud);
  border-top-color: var(--primary);
  border-bottom-color: var(--secondary);
  border-radius: 50%;
  animation: cyber-spin 1s linear infinite;
}

@keyframes cyber-spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--primary);
  letter-spacing: 1px;
}

.loading-bar {
  width: 220px;
  height: 4px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-hud);
  overflow: hidden;
  position: relative;
}

.loading-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 40%;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary);
  animation: cyber-loader-bar 1.5s infinite ease-in-out;
}

@keyframes cyber-loader-bar {
  0% { left: -40%; width: 30%; }
  50% { width: 60%; }
  100% { left: 100%; width: 30%; }
}

.cyber-error-screen {
  padding: 50px 30px;
  background: rgba(255, 0, 60, 0.05);
  border: 1px solid #ff003c;
  clip-path: var(--clip-chamfer);
  text-align: center;
}

.error-badge {
  font-family: var(--font-display);
  font-size: 12px;
  color: #ff003c;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.cyber-error-screen h2 {
  font-family: var(--font-display);
  color: #fff;
  margin-bottom: 12px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
}

/* ================= MODALS & LIGHTBOX ================= */
.cyber-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(4, 7, 14, 0.88);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
}

.cyber-modal.active {
  display: flex;
}

.cyber-modal-card {
  width: 90%;
  max-width: 520px;
  background: var(--bg-panel);
  border: 1px solid var(--primary);
  box-shadow: 0 0 30px var(--primary-glow);
  clip-path: var(--clip-chamfer);
  padding: 28px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-hud);
  padding-bottom: 12px;
}

.modal-header h3 {
  font-family: var(--font-display);
  color: var(--primary);
  font-size: 16px;
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-close-btn:hover {
  color: #ff003c;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--primary);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-hud);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

/* IMAGE LIGHTBOX */
#cyber-lightbox-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.92);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}

#cyber-lightbox-modal.active {
  display: flex;
}

#cyber-lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  border: 1px solid var(--primary);
  box-shadow: 0 0 30px var(--primary-glow);
  object-fit: contain;
}

/* ================= TRANSLATION HUD BANNER ================= */
.cyber-trans-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 16, 28, 0.85);
  border: 1px solid var(--primary);
  padding: 10px 16px;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
  clip-path: var(--clip-chamfer-small);
  box-shadow: 0 4px 16px var(--primary-subtle);
  animation: bannerFadeIn 0.3s ease-out;
}

@keyframes bannerFadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.trans-banner-left {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.trans-banner-left strong {
  color: var(--primary);
}

.trans-check {
  color: #00ff66;
  font-weight: bold;
  font-size: 14px;
  text-shadow: 0 0 8px #00ff66;
}

.pulsing-dot-spin {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  border-top-color: transparent;
  animation: spinLoader 0.8s linear infinite;
}

@keyframes spinLoader {
  to { transform: rotate(360deg); }
}

.trans-progress-line {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
  background-size: 200% 100%;
  animation: scanProgress 1.5s linear infinite;
}

@keyframes scanProgress {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.trans-banner-right {
  display: flex;
  align-items: center;
  gap: 8px;
}