/* ==============================================================================
   Sorai Tokyo Specification Portal Design System (v3.0)
   3-Pane Layout, Dark/Light Themes, Zero-Emoji Modern UI
   ============================================================================== */

/* --- Dark Theme (Default) --- */
:root,
[data-theme="dark"] {
  --bg-primary: #070d18;
  --bg-secondary: #0d1627;
  --bg-sidebar: rgba(13, 22, 39, 0.95);
  --bg-card: rgba(16, 27, 48, 0.92);
  --bg-surface: #14213d;
  --bg-surface-elevated: #1a2b4f;
  --bg-hover: rgba(245, 158, 11, 0.08);

  --accent-gold-start: #f59e0b;
  --accent-gold-end: #d97706;
  --accent-gold: #fbbf24;
  --accent-glow: rgba(245, 158, 11, 0.25);

  --border-color: rgba(255, 255, 255, 0.09);
  --border-color-glow: rgba(245, 158, 11, 0.38);
  --border-subtle: rgba(255, 255, 255, 0.05);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #8292a8;
  --text-inverse: #070d18;

  --primary-blue: #38bdf8;
  --badge-bg: #070c16;
  --badge-color: #38bdf8;
  --badge-border: rgba(56, 189, 248, 0.28);

  --code-bg: #040812;
  --code-header-bg: #0a1120;
  --code-text: #f8fafc;
  --code-inline-bg: rgba(255, 255, 255, 0.06);
  --code-inline-color: #f43f5e;

  --table-th-bg: #0e192f;
  --table-stripe: rgba(255, 255, 255, 0.015);
  --table-hover: rgba(245, 158, 11, 0.06);

  --mermaid-bg: #0a1224;
  --mermaid-border: rgba(255, 255, 255, 0.08);

  --shadow-card: 0 16px 40px rgba(0, 0, 0, 0.45), 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-popover: 0 25px 60px rgba(0, 0, 0, 0.7);

  --font-display: 'Outfit', 'Noto Sans JP', sans-serif;
  --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --transition-smooth: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Light Theme --- */
[data-theme="light"] {
  --bg-primary: #f6f8fb;
  --bg-secondary: #ffffff;
  --bg-sidebar: rgba(255, 255, 255, 0.96);
  --bg-card: rgba(255, 255, 255, 0.98);
  --bg-surface: #f1f5f9;
  --bg-surface-elevated: #e2e8f0;
  --bg-hover: rgba(217, 119, 6, 0.06);

  --accent-gold-start: #d97706;
  --accent-gold-end: #b45309;
  --accent-gold: #d97706;
  --accent-glow: rgba(217, 119, 6, 0.2);

  --border-color: rgba(15, 23, 42, 0.09);
  --border-color-glow: rgba(217, 119, 6, 0.35);
  --border-subtle: rgba(15, 23, 42, 0.05);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --primary-blue: #0284c7;
  --badge-bg: #0f172a;
  --badge-color: #38bdf8;
  --badge-border: rgba(56, 189, 248, 0.25);

  --code-bg: #0f172a;
  --code-header-bg: #1e293b;
  --code-text: #f8fafc;
  --code-inline-bg: rgba(15, 23, 42, 0.05);
  --code-inline-color: #e11d48;

  --table-th-bg: #f8fafc;
  --table-stripe: rgba(15, 23, 42, 0.02);
  --table-hover: rgba(217, 119, 6, 0.04);

  --mermaid-bg: #ffffff;
  --mermaid-border: rgba(15, 23, 42, 0.08);

  --shadow-card: 0 16px 40px rgba(15, 23, 42, 0.06), 0 2px 8px rgba(15, 23, 42, 0.03);
  --shadow-popover: 0 25px 60px rgba(15, 23, 42, 0.18);
}

/* Base Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-display);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface-elevated);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold-start);
}

/* Top Accent Bar */
.top-accent {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3.5px;
  background: linear-gradient(90deg, var(--accent-gold-start), var(--accent-gold-end), #38bdf8, var(--accent-gold-start));
  background-size: 200% 100%;
  animation: accentFlow 8s ease infinite;
  z-index: 1100;
}

@keyframes accentFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Mobile Header */
.mobile-header {
  display: none;
  position: fixed;
  top: 3.5px;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1rem;
  align-items: center;
  justify-content: space-between;
  z-index: 1000;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.mobile-menu-btn,
.mobile-search-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: var(--transition-smooth);
}
.mobile-menu-btn:hover,
.mobile-search-btn:hover {
  color: var(--accent-gold);
  background: var(--bg-hover);
}

.mobile-brand {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}
.mobile-brand-title span {
  background: linear-gradient(90deg, var(--accent-gold-start), var(--accent-gold-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.mobile-header-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ==============================================================================
   3-Pane Grid / Layout
   ============================================================================== */
.app-container {
  display: flex;
  min-height: 100vh;
  position: relative;
}

/* --- LEFT PANE: Sidebar --- */
.sidebar {
  width: 310px;
  background: var(--bg-sidebar);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 3.5px;
  bottom: 0;
  left: 0;
  padding: 1.5rem 1.25rem 1.25rem 1.25rem;
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.brand-section {
  margin-bottom: 1.1rem;
}

.brand-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.brand-title span {
  background: linear-gradient(90deg, var(--accent-gold-start), var(--accent-gold-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}
.theme-toggle-btn:hover {
  border-color: var(--accent-gold-start);
  color: var(--accent-gold);
  background: var(--bg-surface-elevated);
}

[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="dark"] .theme-icon-sun { display: block; color: var(--accent-gold); }

[data-theme="light"] .theme-icon-sun { display: none; }
[data-theme="light"] .theme-icon-moon { display: block; color: var(--text-secondary); }

/* View Mode Switcher (SYS / HP) */
.view-mode-switcher {
  display: flex;
  background: var(--bg-surface);
  border-radius: 9px;
  padding: 3px;
  gap: 3px;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
}
.mode-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.4rem;
  border-radius: 7px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}
.mode-tab:hover {
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
}
.mode-tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.mode-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.12rem 0.4rem;
  border-radius: 4px;
  background: var(--badge-bg);
  color: var(--badge-color);
  border: 1px solid var(--badge-border);
  letter-spacing: 0.04em;
}
.mode-tab.active .mode-badge {
  background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
  color: #ffffff;
  border-color: transparent;
}

/* Quick Search Trigger Bar */
.search-trigger-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 9px;
  padding: 0.55rem 0.8rem;
  color: var(--text-muted);
  font-size: 0.84rem;
  cursor: pointer;
  margin-bottom: 1.25rem;
  transition: var(--transition-smooth);
}
.search-trigger-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.search-trigger-btn:hover {
  border-color: var(--accent-gold-start);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  box-shadow: 0 0 12px var(--accent-glow);
}
.search-key-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 0.15rem 0.45rem;
  border-radius: 5px;
  color: var(--text-muted);
  font-weight: 600;
}

.toc-title {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-gold-start);
  margin-bottom: 0.65rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.module-count-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
}

.toc-list {
  list-style: none;
  margin-bottom: 1.25rem;
  flex: 1;
}

/* Category Groups (No Emoji - Clean Text Badges) */
.toc-category-group {
  margin-bottom: 1.1rem;
}
.toc-category-group:last-child {
  margin-bottom: 0.4rem;
}

.toc-category-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.55rem;
  margin-bottom: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
  user-select: none;
}

.toc-category-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  background: var(--bg-primary);
  color: var(--accent-gold);
  border: 1px solid var(--border-color-glow);
  letter-spacing: 0.05em;
  line-height: 1;
}

.toc-category-title {
  flex: 1;
  font-weight: 700;
  color: var(--text-secondary);
}

.toc-category-count {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.08rem 0.35rem;
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-muted);
  font-weight: 600;
}

.toc-category-list {
  list-style: none;
  padding-left: 0;
}

.toc-item {
  margin-bottom: 0.35rem;
}

.toc-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.65rem;
  border-radius: 7px;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  background: transparent;
}

.toc-link .toc-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  background: var(--badge-bg);
  color: var(--badge-color);
  border: 1px solid var(--badge-border);
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  text-align: center;
  transition: var(--transition-smooth);
  flex-shrink: 0;
}

.toc-link .toc-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.toc-link:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
  border-color: var(--border-color);
  padding-left: 0.8rem;
}
.toc-link:hover .toc-num {
  border-color: var(--accent-gold-start);
  color: var(--accent-gold);
}

.toc-link.active {
  color: var(--text-primary);
  font-weight: 600;
  background: var(--bg-surface-elevated);
  border-color: var(--border-color-glow);
  border-left: 3px solid var(--accent-gold-start);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}
.toc-link.active .toc-num {
  background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* Sub-TOC in Sidebar */
.toc-sub-list {
  list-style: none;
  margin: 0.25rem 0 0.45rem 1rem;
  padding-left: 0.65rem;
  border-left: 1.5px solid var(--border-color);
  display: none;
}
.toc-item.active .toc-sub-list {
  display: block;
}

.toc-sub-item {
  margin: 0.2rem 0;
}
.toc-sub-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  transition: var(--transition-smooth);
  line-height: 1.35;
}
.toc-sub-link .sub-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--primary-blue);
  flex-shrink: 0;
}
.toc-sub-link .sub-text {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.toc-sub-link:hover {
  color: var(--accent-gold);
  background: var(--bg-surface);
  padding-left: 0.55rem;
}

.badge-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 0.12rem 0.42rem;
  border-radius: 4px;
  background: var(--badge-bg);
  color: var(--badge-color);
  border: 1px solid var(--badge-border);
}

/* Sidebar Footer Actions */
.sidebar-footer-actions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-color);
}

.knowledge-graph-btn,
.api-catalog-btn,
.all-in-one-btn,
.download-md-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.5rem 0.75rem;
  border-radius: 7px;
  border: 1px solid var(--border-color);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.knowledge-graph-btn {
  background: var(--bg-surface);
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.35);
}
.knowledge-graph-btn:hover {
  background: var(--bg-surface-elevated);
  border-color: #38bdf8;
  color: #7dd3fc;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.32);
}

.api-catalog-btn {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color-glow);
}
.api-catalog-btn:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--accent-gold-start);
  color: var(--accent-gold);
  box-shadow: 0 0 10px var(--accent-glow);
}

.all-in-one-btn {
  background: var(--bg-surface);
  color: var(--text-secondary);
}
.all-in-one-btn:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--accent-gold-start);
  color: var(--text-primary);
}
.all-in-one-btn.active {
  background: var(--bg-surface-elevated);
  border-color: var(--accent-gold-start);
  color: var(--accent-gold);
}

.download-md-btn {
  background: transparent;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
}
.download-md-btn:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color);
}

/* User Profile Badge */
.user-profile-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 0.65rem;
  padding: 0.55rem 0.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 9px;
  transition: var(--transition-smooth);
}
.user-profile-badge:hover {
  border-color: var(--border-color-glow);
  background: var(--bg-surface-elevated);
}

.user-profile-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  flex: 1;
}

.user-avatar-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  flex-shrink: 0;
}

.user-info-text {
  min-width: 0;
  flex: 1;
  text-align: left;
}

.user-role-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-gold);
  line-height: 1;
  margin-bottom: 0.1rem;
}

.user-email-text {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.user-logout-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-smooth);
  flex-shrink: 0;
}
.user-logout-link:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}

/* ==============================================================================
   CENTER PANE: Main Content Area
   ============================================================================== */
.main-content {
  flex: 1;
  margin-left: 310px;
  margin-right: 270px;
  padding: 2.75rem 2.5rem;
  max-width: 980px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: margin 0.25s ease;
}

#wiki-container {
  position: relative;
  flex: 1;
  width: 100%;
}

.wiki-section {
  transition: opacity 0.2s ease-in-out;
  width: 100%;
}

.content-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 3rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 2.5rem;
}

/* Card Breadcrumbs */
.card-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-weight: 500;
  flex-wrap: wrap;
}
.bc-mode-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  background: var(--badge-bg);
  color: var(--badge-color);
  border: 1px solid var(--badge-border);
}
.bc-sep {
  color: var(--border-color-glow);
  font-weight: bold;
}
.bc-category {
  color: var(--accent-gold);
  font-weight: 600;
}
.bc-current {
  color: var(--text-secondary);
}

/* Card Module Header */
.card-module-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.module-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  background: var(--bg-surface);
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
}

.module-header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
}
.action-btn:hover {
  border-color: var(--accent-gold-start);
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
}

/* Prev / Next Module Cards Navigation Footer */
.module-nav-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.module-nav-placeholder {
  visibility: hidden;
}

.module-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  text-decoration: none;
  transition: var(--transition-smooth);
}
.module-nav-card:hover {
  border-color: var(--accent-gold-start);
  background: var(--bg-surface-elevated);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.nav-card-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-gold);
}
.next-card .nav-card-label {
  justify-content: flex-end;
}
.next-card {
  text-align: right;
}

.nav-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.next-card .nav-card-title {
  justify-content: flex-end;
}

/* ==============================================================================
   RIGHT PANE: On This Page (Sticky Headings TOC & ScrollSpy)
   ============================================================================== */
.on-this-page-pane {
  width: 270px;
  background: var(--bg-sidebar);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-left: 1px solid var(--border-color);
  position: fixed;
  top: 3.5px;
  bottom: 0;
  right: 0;
  padding: 2rem 1.25rem 1.25rem 1.25rem;
  overflow-y: auto;
  z-index: 90;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.otp-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.otp-header {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.otp-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  background: var(--badge-bg);
  color: var(--badge-color);
  border: 1px solid var(--badge-border);
}

.otp-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.otp-nav {
  flex: 1;
  overflow-y: auto;
}

.otp-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.otp-item {
  position: relative;
}

.otp-link {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.3rem 0.6rem;
  border-radius: 5px;
  border-left: 2px solid transparent;
  line-height: 1.4;
  transition: var(--transition-smooth);
  word-break: break-word;
}
.otp-link[data-level="3"] {
  padding-left: 1.4rem;
  font-size: 0.76rem;
  color: var(--text-muted);
  opacity: 0.9;
}

.otp-link:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  border-left-color: var(--border-color-glow);
}

.otp-link.active {
  color: var(--accent-gold);
  font-weight: 600;
  background: var(--bg-hover);
  border-left: 2.5px solid var(--accent-gold-start);
  box-shadow: inset 0 0 12px var(--accent-glow);
}

.otp-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.otp-back-to-top-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-decoration: none;
  transition: var(--transition-smooth);
}
.otp-back-to-top-link:hover {
  color: var(--accent-gold);
}

/* ==============================================================================
   Markdown Element Typography & Components
   ============================================================================== */
.markdown-body {
  color: var(--text-primary);
}

h1 {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  letter-spacing: -0.01em;
}

h1::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100px;
  height: 2.5px;
  background: linear-gradient(90deg, var(--accent-gold-start), var(--accent-gold-end));
  box-shadow: 0 0 10px var(--accent-glow);
}

.spec-heading {
  position: relative;
}

h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 3rem;
  margin-bottom: 1.15rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.65rem;
  letter-spacing: -0.01em;
}

h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.15em;
  background: linear-gradient(180deg, var(--accent-gold-start), var(--accent-gold-end));
  border-radius: 3px;
  box-shadow: 0 0 8px var(--accent-glow);
}

h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-gold);
  margin-top: 2rem;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

h4 {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 1.5rem;
  margin-bottom: 0.65rem;
}

/* Heading Anchor Permalinks (#) */
.heading-anchor-link {
  opacity: 0;
  margin-left: 0.5rem;
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85em;
  font-weight: 600;
  padding: 0 0.3rem;
  border-radius: 4px;
  transition: opacity 0.2s ease, color 0.2s ease;
  border-bottom: none !important;
}

.spec-heading:hover .heading-anchor-link {
  opacity: 1;
}
.heading-anchor-link:hover {
  color: var(--accent-gold-start);
  background: var(--bg-hover);
}

p {
  margin-bottom: 1.4rem;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.8;
}

a {
  color: var(--accent-gold);
  text-decoration: none;
  transition: var(--transition-smooth);
  border-bottom: 1px dashed var(--border-color-glow);
}
a:hover {
  color: var(--text-primary);
  border-bottom-color: var(--accent-gold-start);
}

ul, ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.45rem;
}

strong {
  color: var(--text-primary);
  font-weight: 600;
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background-color: var(--code-inline-bg);
  padding: 0.15rem 0.45rem;
  border-radius: 5px;
  color: var(--code-inline-color);
  border: 1px solid var(--border-color);
}

/* Code Block Containers with Copy Button */
.code-block-wrapper {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 1.75rem;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.code-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.45rem 0.9rem;
  background: var(--code-header-bg);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.code-lang-label {
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary-blue);
}

.code-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 0.2rem 0.55rem;
  font-family: var(--font-display);
  font-size: 0.74rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-smooth);
}
.code-copy-btn:hover {
  border-color: var(--accent-gold-start);
  color: var(--accent-gold);
  background: rgba(255, 255, 255, 0.12);
}
.code-copy-btn.copied {
  border-color: #10b981;
  color: #10b981;
}

pre {
  background-color: var(--code-bg);
  padding: 1.25rem 1.4rem;
  overflow-x: auto;
  margin: 0;
}

pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  color: var(--code-text);
  font-size: 0.9em;
  border: none;
  line-height: 1.65;
}

/* Blockquotes */
blockquote {
  background: var(--bg-surface);
  border-left: 4px solid var(--accent-gold-start);
  border-radius: 0 10px 10px 0;
  padding: 1.1rem 1.4rem;
  margin-bottom: 1.75rem;
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
blockquote p {
  margin-bottom: 0;
  color: var(--text-primary);
  font-style: italic;
}

/* Tables (Sticky Header & Striped) */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-card);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

th {
  background-color: var(--table-th-bg);
  position: sticky;
  top: 0;
  border-bottom: 2px solid var(--border-color);
  color: var(--text-primary);
  font-weight: 700;
  padding: 0.85rem 1rem;
  z-index: 2;
  white-space: nowrap;
}

td {
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.8rem 1rem;
  line-height: 1.6;
}

tbody tr:nth-child(even) {
  background-color: var(--table-stripe);
}

tbody tr:hover {
  background-color: var(--table-hover);
}

hr {
  border: 0;
  height: 1px;
  background: var(--border-color);
  margin: 2.5rem 0;
}

/* Mermaid Diagrams */
.mermaid-wrapper {
  position: relative;
  margin: 2rem 0;
  background: var(--mermaid-bg);
  border: 1px solid var(--mermaid-border);
  border-radius: 14px;
  padding: 1.75rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  overflow-x: auto;
}

.mermaid {
  text-align: center;
}
.mermaid svg {
  max-width: 100% !important;
  height: auto !important;
  margin: 0 auto;
  display: inline-block;
  min-width: 620px;
}

.mermaid-expand-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.3rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  z-index: 10;
}
.mermaid-expand-btn:hover {
  border-color: var(--accent-gold-start);
  color: var(--accent-gold);
  background: var(--bg-surface-elevated);
}

/* Changelog Timeline */
.changelog-timeline {
  position: relative;
  padding-left: 2rem;
  margin-top: 2rem;
}
.changelog-timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}
.changelog-item {
  position: relative;
  margin-bottom: 2rem;
}
.changelog-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.35rem;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 3px solid var(--accent-gold-start);
  box-shadow: 0 0 8px var(--accent-glow);
  transition: var(--transition-smooth);
}
.changelog-item:hover::before {
  background: var(--accent-gold-start);
  box-shadow: 0 0 12px var(--accent-gold-start);
}
.changelog-meta {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
}
.changelog-date {
  color: var(--accent-gold);
  font-weight: 700;
  font-family: var(--font-mono);
}
.changelog-author {
  color: var(--text-muted);
  font-weight: 500;
  background: var(--bg-surface);
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}
.changelog-msg {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* All-in-One Mode Banner */
.all-in-one-banner {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.12) 0%, rgba(212, 175, 55, 0.12) 100%);
  border: 1px solid var(--border-color-glow);
  border-radius: 14px;
  padding: 1.5rem 2rem;
  margin-bottom: 2.5rem;
}
.all-banner-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}
.all-banner-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.all-module-divider {
  margin: 3.5rem 0 1.5rem 0;
  position: relative;
  text-align: center;
}
.all-module-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border-color);
  z-index: 1;
}
.all-module-pill {
  position: relative;
  z-index: 2;
  background: var(--bg-card);
  border: 1px solid var(--border-color-glow);
  padding: 0.35rem 1.1rem;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-gold);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Back to Top Floating Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 20rem;
  background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
  color: #ffffff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-weight: bold;
  box-shadow: 0 4px 20px var(--accent-glow);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
  z-index: 200;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--accent-glow);
}

/* ==============================================================================
   Modals & Popups (Search, API Catalog, Mermaid Fullscreen)
   ============================================================================== */
/* Global Instant Search Modal */
.search-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(4, 8, 16, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.search-modal-backdrop.open {
  display: flex;
  opacity: 1;
}
.search-modal-window {
  width: 650px;
  max-width: 92vw;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-popover);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 75vh;
}
.search-input-box {
  display: flex;
  align-items: center;
  padding: 1rem 1.35rem;
  border-bottom: 1px solid var(--border-color);
  gap: 0.8rem;
  background: var(--bg-surface);
}
.search-icon-symbol {
  color: var(--text-muted);
  flex-shrink: 0;
}
.search-input-field {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--text-primary);
  background: transparent;
}
.search-esc-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.5rem;
  border-radius: 5px;
  color: var(--text-muted);
  cursor: pointer;
}
.search-results-list {
  list-style: none;
  padding: 0.4rem 0;
  overflow-y: auto;
  max-height: 55vh;
}
.search-result-item {
  padding: 0.75rem 1.35rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: var(--transition-smooth);
  border-left: 3px solid transparent;
}
.search-result-item:hover,
.search-result-item.selected {
  background: var(--bg-hover);
  border-left-color: var(--accent-gold-start);
}
.search-res-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}
.search-res-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}
.search-res-text {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-empty-state {
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.92rem;
}
.search-footer-hint {
  padding: 0.6rem 1.35rem;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.74rem;
  color: var(--text-muted);
}

/* API Catalog & Mermaid Modals */
.api-catalog-modal-backdrop,
.mermaid-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(4, 8, 16, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.api-catalog-modal-backdrop.open,
.mermaid-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}
.api-catalog-modal-window,
.mermaid-modal-window {
  width: 90%;
  max-width: 1000px;
  max-height: 88vh;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-popover);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.api-catalog-header,
.mermaid-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.catalog-search-input {
  border: 1px solid var(--border-color);
  border-radius: 7px;
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
  background: var(--bg-card);
  color: var(--text-primary);
  width: 240px;
  outline: none;
}
.catalog-search-input:focus {
  border-color: var(--accent-gold-start);
}

.modal-close-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem;
  border-radius: 6px;
  transition: var(--transition-smooth);
}
.modal-close-btn:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.api-catalog-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.mermaid-modal-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.modal-ctrl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-smooth);
}
.modal-ctrl-btn:hover {
  border-color: var(--accent-gold-start);
  color: var(--accent-gold);
  background: var(--bg-hover);
}
.modal-download-btn {
  color: var(--accent-gold);
  border-color: var(--border-color-glow);
}

.mermaid-modal-body {
  padding: 1.5rem;
  overflow: hidden;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--mermaid-bg);
  position: relative;
}

/* Toast Notifications */
.spec-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color-glow);
  color: var(--text-primary);
  padding: 0.75rem 1.25rem;
  border-radius: 9px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-popover);
  z-index: 9999;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}
.spec-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==============================================================================
   Auth & SSO UI Styles (Login & Forbidden)
   ============================================================================== */
.auth-page-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  padding: 1.5rem;
  background: radial-gradient(circle at 50% 20%, rgba(212, 175, 55, 0.08) 0%, transparent 60%), var(--bg-primary);
}
.auth-wrapper {
  width: 100%;
  max-width: 480px;
  display: flex;
  justify-content: center;
}
.auth-card {
  width: 100%;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-card);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-gold-start), var(--accent-gold-end), #38bdf8);
}
.auth-card-forbidden::before {
  background: linear-gradient(90deg, #ef4444, #f59e0b, #ef4444);
}
.auth-brand {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.auth-brand-subtitle {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-top: 0.25rem;
}
.auth-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.75rem;
  background: var(--bg-hover);
  border: 1px solid var(--border-color-glow);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-gold);
  margin-bottom: 1rem;
}
.auth-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-gold-start);
  box-shadow: 0 0 6px var(--accent-gold-start);
}
.auth-badge-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #ef4444;
}
.auth-badge-dot-danger {
  background: #ef4444;
  box-shadow: 0 0 6px #ef4444;
}
.auth-heading {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}
.auth-description {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}
.google-sso-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.85rem 1.25rem;
  background: #ffffff;
  color: #3c4043;
  border: 1px solid #dadce0;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: var(--transition-smooth);
  cursor: pointer;
}
.google-sso-btn:hover {
  background: #f8fafd;
  box-shadow: 0 4px 12px rgba(66, 133, 244, 0.25);
  transform: translateY(-1px);
}
.forbidden-user-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin-bottom: 1.25rem;
  text-align: left;
}
.forbidden-user-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}
.forbidden-user-email {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}
.reauth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.8rem 1.25rem;
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-smooth);
}
.reauth-btn:hover {
  background: var(--accent-gold-start);
  color: #ffffff;
  border-color: var(--accent-gold-start);
}
.auth-security-notice {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

/* ==============================================================================
   Responsive Breakpoints
   ============================================================================== */
@media (max-width: 1280px) {
  .on-this-page-pane {
    display: none;
  }
  .main-content {
    margin-right: 0;
    max-width: calc(100vw - 340px);
  }
  .back-to-top {
    right: 2rem;
  }
}

@media (max-width: 992px) {
  .mobile-header {
    display: flex;
  }
  .sidebar {
    position: fixed;
    top: 59.5px;
    left: 0;
    bottom: 0;
    width: 290px;
    transform: translateX(-100%);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    z-index: 1050;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .mobile-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1040;
  }
  .mobile-backdrop.open {
    display: block;
  }
  .main-content {
    margin-left: 0;
    margin-right: 0;
    padding: 1.5rem 1rem;
    margin-top: 56px;
    max-width: 100%;
  }
  .content-card {
    padding: 1.75rem 1.25rem;
    border-radius: 14px;
  }
  .module-nav-footer {
    grid-template-columns: 1fr;
  }
  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* ==============================================================================
   Knowledge Graph Visualizer Modal & Inspector Styles
   ============================================================================== */
.knowledge-graph-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(4, 8, 16, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 2100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

.knowledge-graph-modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.knowledge-graph-modal-window {
  width: 95vw;
  max-width: 1440px;
  height: 92vh;
  max-height: 920px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-popover);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.knowledge-graph-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.4rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
  flex-shrink: 0;
}

.knowledge-graph-title-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.knowledge-graph-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-display);
}

.knowledge-graph-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.graph-search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.graph-search-box svg {
  position: absolute;
  left: 0.65rem;
  color: var(--text-muted);
  pointer-events: none;
}

.graph-search-input {
  border: 1px solid var(--border-color);
  border-radius: 7px;
  padding: 0.4rem 0.75rem 0.4rem 2rem;
  font-size: 0.82rem;
  background: var(--bg-card);
  color: var(--text-primary);
  width: 220px;
  outline: none;
  transition: var(--transition-smooth);
}

.graph-search-input:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.28);
}

.knowledge-graph-filter-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.4rem;
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
  flex-shrink: 0;
}

.graph-filter-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28rem 0.65rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  opacity: 0.55;
  user-select: none;
}

.graph-filter-pill.active {
  opacity: 1;
  border-color: rgba(56, 189, 248, 0.4);
  color: var(--text-primary);
  background: rgba(56, 189, 248, 0.08);
}

.graph-filter-pill:hover {
  opacity: 0.95;
  border-color: var(--accent-gold-start);
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.knowledge-graph-main {
  display: flex;
  flex: 1;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.knowledge-graph-canvas {
  flex: 1;
  height: 100%;
  min-height: 400px;
  background: radial-gradient(circle at 50% 50%, rgba(16, 28, 52, 0.7) 0%, rgba(7, 13, 24, 0.98) 100%);
  position: relative;
}

[data-theme="light"] .knowledge-graph-canvas {
  background: radial-gradient(circle at 50% 50%, rgba(241, 245, 249, 0.9) 0%, rgba(226, 232, 240, 0.98) 100%);
}

.knowledge-graph-inspector {
  width: 350px;
  border-left: 1px solid var(--border-color);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
  padding: 1.25rem;
}

.inspector-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100%;
  color: var(--text-muted);
  gap: 0.75rem;
  padding: 1.5rem 1rem;
}

.inspector-empty svg {
  color: var(--text-muted);
  opacity: 0.6;
}

.inspector-empty-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.inspector-empty-text {
  font-size: 0.8rem;
  line-height: 1.5;
  max-width: 240px;
}

.inspector-stats {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  width: 100%;
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border-subtle);
}

.stat-badge {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  background: var(--bg-surface);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
}

.stat-badge strong {
  color: var(--accent-gold);
}

.inspector-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.inspector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.inspector-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  border: 1px solid transparent;
  color: #fff;
  letter-spacing: 0.03em;
}

.inspector-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  display: flex;
  transition: var(--transition-smooth);
}

.inspector-close-btn:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.inspector-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  word-break: break-all;
  line-height: 1.4;
}

.inspector-id {
  font-size: 0.75rem;
  color: var(--text-muted);
  word-break: break-all;
}

.inspector-id code {
  font-family: var(--font-mono);
  color: var(--primary-blue);
  background: var(--code-inline-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
}

.inspector-category {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.inspector-section-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-top: 0.4rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.25rem;
}

.inspector-metadata-table {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-height: 180px;
  overflow-y: auto;
  background: var(--bg-surface);
  border-radius: 6px;
  padding: 0.6rem;
  font-size: 0.75rem;
  border: 1px solid var(--border-subtle);
}

.metadata-row {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}

.metadata-key {
  color: var(--text-muted);
  font-weight: 600;
  word-break: break-all;
}

.metadata-val {
  color: var(--text-secondary);
  text-align: right;
  word-break: break-all;
  font-family: var(--font-mono);
}

.inspector-relations-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-height: 220px;
  overflow-y: auto;
}

.relation-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.6rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.relation-item:hover {
  background: var(--bg-surface-elevated);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--primary-blue);
}

.relation-type {
  font-weight: 700;
  color: var(--accent-gold);
  font-size: 0.7rem;
}

.relation-dir {
  color: var(--text-muted);
}

.relation-target {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.relation-empty {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 0.4rem;
}

.inspector-actions {
  margin-top: 0.6rem;
}

.inspector-doc-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background: var(--accent-gold-start);
  color: #070d18;
  border: none;
  border-radius: 7px;
  padding: 0.55rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.inspector-doc-btn:hover {
  background: var(--accent-gold);
  box-shadow: 0 0 12px var(--accent-glow);
}

.graph-loading,
.graph-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.graph-spinner {
  width: 34px;
  height: 34px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@media (max-width: 900px) {
  .knowledge-graph-modal-window {
    width: 98vw;
    height: 96vh;
  }
  .knowledge-graph-main {
    flex-direction: column;
  }
  .knowledge-graph-inspector {
    width: 100%;
    height: 240px;
    border-left: none;
    border-top: 1px solid var(--border-color);
  }
}

/* Print Styles */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }
  .sidebar,
  .on-this-page-pane,
  .top-accent,
  .mobile-header,
  .back-to-top,
  .search-trigger-btn,
  .search-modal-backdrop,
  .action-btn,
  .all-in-one-banner,
  .view-mode-switcher,
  .download-md-btn,
  .module-nav-footer {
    display: none !important;
  }
  .main-content {
    margin: 0 !important;
    padding: 0 !important;
    max-width: 100% !important;
  }
  .content-card {
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    margin-bottom: 2rem !important;
    background: transparent !important;
  }
  .wiki-section {
    display: block !important;
    opacity: 1 !important;
    page-break-after: always;
  }
}