/* ============================
   WADI WHITE PAPER — MODERN DOCS
   ============================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&family=Crimson+Pro:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
  --bg: #FFFFFF;
  --bg-secondary: #FAFAFA;
  --bg-tertiary: #F3F4F6;
  --surface: #FFFFFF;
  --border: #E5E7EB;
  --border-light: #F3F4F6;
  --text: #374151;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --heading: #111827;
  --primary: #6366F1;
  --primary-light: #818CF8;
  --primary-bg: #EEF2FF;
  --primary-border: #C7D2FE;
  --green: #059669;
  --green-bg: #ECFDF5;
  --green-border: #A7F3D0;
  --yellow: #D97706;
  --yellow-bg: #FFFBEB;
  --yellow-border: #FDE68A;
  --red: #DC2626;
  --red-bg: #FEF2F2;
  --red-border: #FECACA;
  --purple: #7C3AED;
  --purple-bg: #F5F3FF;
  --cyan: #0891B2;
  --code-bg: #F9FAFB;
  --sidebar-bg: #FAFAFA;
  --sidebar-hover: #F3F4F6;
  --sidebar-active: #EEF2FF;
  --topbar-bg: rgba(255,255,255,0.80);
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --sidebar-width: 270px;
  --topbar-height: 60px;
  --toc-width: 220px;
  --content-max: 760px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0F0F0F;
  --bg-secondary: #171717;
  --bg-tertiary: #1F1F1F;
  --surface: #1A1A1A;
  --border: #2A2A2A;
  --border-light: #222222;
  --text: #D1D5DB;
  --text-secondary: #9CA3AF;
  --text-tertiary: #6B7280;
  --heading: #F3F4F6;
  --primary: #818CF8;
  --primary-light: #A5B4FC;
  --primary-bg: rgba(99,102,241,0.1);
  --primary-border: rgba(99,102,241,0.2);
  --green: #34D399;
  --green-bg: rgba(52,211,153,0.1);
  --green-border: rgba(52,211,153,0.2);
  --yellow: #FBBF24;
  --yellow-bg: rgba(251,191,36,0.1);
  --yellow-border: rgba(251,191,36,0.2);
  --red: #F87171;
  --red-bg: rgba(248,113,113,0.1);
  --red-border: rgba(248,113,113,0.2);
  --purple: #A78BFA;
  --purple-bg: rgba(167,139,250,0.1);
  --cyan: #22D3EE;
  --code-bg: #1A1A1A;
  --sidebar-bg: #141414;
  --sidebar-hover: #1F1F1F;
  --sidebar-active: rgba(99,102,241,0.1);
  --topbar-bg: rgba(15,15,15,0.85);
}

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

html { scroll-behavior: smooth; font-size: 16px; scroll-padding-top: 80px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ======== TOPBAR ======== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-height);
  background: var(--topbar-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
}
.topbar__left, .topbar__right { display: flex; align-items: center; gap: 12px; }
.topbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--heading);
}
.logo-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.logo-mark img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.logo-text { font-weight: 800; font-size: 1.05rem; letter-spacing: -0.02em; }
.logo-divider {
  width: 1px; height: 24px;
  background: var(--border);
  margin: 0 2px;
}
.logo-label {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

.sidebar-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  color: var(--text-secondary);
  padding: 6px;
  border-radius: var(--radius-xs);
  transition: var(--transition);
}
.sidebar-toggle:hover { background: var(--bg-tertiary); }

/* Search */
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: text;
  min-width: 260px;
  transition: var(--transition);
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
}
.search-box svg { color: var(--text-tertiary); flex-shrink: 0; }
.search-box input {
  border: none; background: none; outline: none;
  font-family: inherit; font-size: 0.82rem;
  color: var(--text); flex: 1; min-width: 0;
}
.search-box input::placeholder { color: var(--text-tertiary); }
.search-box kbd {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  padding: 2px 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-tertiary);
  letter-spacing: 0.3px;
}

/* Theme toggle */
.theme-toggle {
  background: none; border: none; cursor: pointer;
  color: var(--text-secondary);
  width: 36px; height: 36px;
  border-radius: var(--radius-xs);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.theme-toggle:hover { background: var(--bg-secondary); color: var(--heading); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* Btn */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: inherit; font-weight: 600; font-size: 0.8rem;
  border: none; border-radius: var(--radius-xs);
  cursor: pointer; text-decoration: none;
  transition: var(--transition);
}
.btn--primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-xs);
}
.btn--primary:hover { background: var(--primary-light); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn--sm { padding: 7px 16px; }

/* ======== SIDEBAR ======== */
.sidebar {
  position: fixed;
  top: var(--topbar-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  z-index: 90;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}
.sidebar__nav {
  flex: 1;
  padding: 20px 14px;
  overflow-y: auto;
}
.nav-group { margin-bottom: 24px; }
.nav-group__title {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-tertiary);
  padding: 0 10px;
  margin-bottom: 6px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition: var(--transition);
  font-weight: 500;
  margin-bottom: 1px;
}
.nav-item svg { flex-shrink: 0; opacity: 0.5; width: 15px; height: 15px; }
.nav-item:hover {
  background: var(--sidebar-hover);
  color: var(--text);
}
.nav-item.active {
  background: var(--sidebar-active);
  color: var(--primary);
  font-weight: 600;
}
.nav-item.active svg { opacity: 1; color: var(--primary); }

/* Sidebar footer */
.sidebar__footer {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
}
.sidebar__version {
  font-size: 0.68rem;
  color: var(--text-tertiary);
  margin-bottom: 10px;
}
.progress-bar {
  height: 3px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s ease;
}
.progress-label {
  font-size: 0.65rem;
  color: var(--text-tertiary);
  margin-top: 6px;
  display: block;
}

/* ======== MAIN ======== */
.main {
  margin-left: var(--sidebar-width);
  margin-top: var(--topbar-height);
  display: flex;
  min-height: calc(100vh - var(--topbar-height));
}
.content {
  flex: 1;
  max-width: calc(var(--content-max) + 100px);
  padding: 48px 50px 100px;
  min-width: 0;
}

/* ======== RIGHT TOC ======== */
.toc-sidebar {
  width: var(--toc-width);
  flex-shrink: 0;
  padding: 48px 20px 40px 0;
  position: sticky;
  top: var(--topbar-height);
  max-height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
}
.toc-sidebar__title {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}
.toc-sidebar__nav a {
  display: block;
  font-size: 0.76rem;
  color: var(--text-tertiary);
  text-decoration: none;
  padding: 5px 0 5px 14px;
  border-left: 2px solid transparent;
  transition: var(--transition);
  line-height: 1.5;
}
.toc-sidebar__nav a:hover { color: var(--text-secondary); }
.toc-sidebar__nav a.active {
  color: var(--primary);
  border-left-color: var(--primary);
}

/* ======== DOCUMENT SECTIONS ======== */
.doc-section {
  padding-bottom: 56px;
  margin-bottom: 56px;
  border-bottom: 1px solid var(--border-light);
}
.doc-section:last-of-type { border-bottom: none; }

.section-header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 36px;
}
.section-number {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-bg);
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: 0.5px;
  border: 1px solid var(--primary-border);
}
.section-header h2 {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--heading);
  letter-spacing: -0.03em;
  line-height: 1.3;
}

/* Content typography */
.content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--heading);
  margin: 36px 0 16px;
  letter-spacing: -0.02em;
}
.content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--heading);
  margin: 24px 0 10px;
}
.content p {
  margin-bottom: 16px;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text);
}
.content strong { color: var(--heading); font-weight: 600; }
.content ul, .content ol {
  margin: 12px 0 20px 24px;
  font-size: 0.92rem;
}
.content li {
  margin-bottom: 8px;
  line-height: 1.75;
}

/* ======== COVER ======== */
.cover {
  text-align: center;
  padding: 60px 0 40px;
}
.cover__logo {
  margin-bottom: 32px;
}
.cover__logo img {
  width: 72px; height: 72px;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
}
.cover__badge {
  display: inline-block;
  padding: 6px 18px;
  background: var(--primary-bg);
  border: 1px solid var(--primary-border);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 28px;
}
.cover__title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 12px;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.cover__subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  font-weight: 400;
  line-height: 1.6;
}
.cover__meta {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.meta-item { text-align: center; }
.meta-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.meta-value {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--heading);
}
.cover__description {
  max-width: 600px;
  margin: 0 auto 48px;
  text-align: left;
}
.cover__description p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.85;
}
.cover__toc {
  text-align: left;
  max-width: 520px;
  margin: 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 36px;
}
.cover__toc h3 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--heading);
  margin: 0 0 16px;
}
.toc-list {
  list-style: none;
  counter-reset: toc;
  margin: 0; padding: 0;
}
.toc-list li { counter-increment: toc; margin-bottom: 4px; }
.toc-list li a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: var(--transition);
  border-radius: 4px;
}
.toc-list li a:hover { color: var(--primary); }
.toc-list li a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-tertiary);
  min-width: 22px;
}

/* ======== CALLOUTS ======== */
.callout {
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  margin: 20px 0;
  border-left: 4px solid;
}
.callout__title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}
.callout p { margin-bottom: 0; font-size: 0.9rem; }
.callout--blue { background: var(--primary-bg); border-color: var(--primary); }
.callout--blue .callout__title { color: var(--primary); }
.callout--green { background: var(--green-bg); border-color: var(--green); }
.callout--green .callout__title { color: var(--green); }
.callout--gray { background: var(--bg-secondary); border-color: var(--border); }
.callout--gray .callout__title { color: var(--text-secondary); }
.callout--yellow { background: var(--yellow-bg); border-color: var(--yellow); }
.callout--yellow .callout__title { color: var(--yellow); }
.callout--red { background: var(--red-bg); border-color: var(--red); }
.callout--red .callout__title { color: var(--red); }

/* ======== INFO GRID ======== */
.info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 28px 0;
}
.info-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 22px 16px;
  text-align: center;
  transition: var(--transition);
}
.info-card:hover { border-color: var(--primary-border); box-shadow: var(--shadow-sm); }
.info-card__value {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--heading);
  display: block;
  letter-spacing: -0.02em;
}
.info-card__label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 4px;
  line-height: 1.4;
}

/* ======== FEATURE GRID ======== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 24px 0 32px;
}
.feature-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  transition: var(--transition);
}
.feature-card:hover { border-color: var(--primary-border); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.feature-card__icon { font-size: 1.5rem; margin-bottom: 10px; }
.feature-card h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--heading);
  margin: 0 0 8px;
}
.feature-card p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.65;
}

/* ======== TABLES ======== */
.table-scroll { overflow-x: auto; margin: 20px 0; border-radius: var(--radius-sm); }
.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.doc-table thead { background: var(--bg-secondary); }
.doc-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.doc-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text);
}
.doc-table tbody tr { transition: var(--transition); }
.doc-table tbody tr:hover { background: var(--bg-secondary); }
.doc-table--striped tbody tr:nth-child(even) { background: var(--bg-secondary); }
.col-highlight { color: var(--green) !important; font-weight: 600; }
.row--highlight { background: var(--primary-bg) !important; font-weight: 600; }

/* ======== BLOCKQUOTE ======== */
.doc-quote {
  border-left: 3px solid var(--primary);
  padding: 20px 28px;
  margin: 28px 0;
  background: var(--bg-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 1.08rem;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.75;
}
.doc-quote cite {
  display: block;
  margin-top: 10px;
  font-family: 'Inter', sans-serif;
  font-size: 0.76rem;
  font-style: normal;
  color: var(--text-tertiary);
}

/* ======== NUMBERED LIST ======== */
.numbered-list { margin: 24px 0; }
.numbered-item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-light);
}
.numbered-item:last-child { border-bottom: none; }
.numbered-item__num {
  width: 32px; height: 32px;
  background: var(--primary-bg);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem; font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}
.numbered-item h4 { margin: 0 0 4px; font-size: 0.95rem; }
.numbered-item p { margin: 0; font-size: 0.86rem; color: var(--text-secondary); line-height: 1.65; }

/* ======== ARCHITECTURE DIAGRAM ======== */
.arch-diagram {
  margin: 28px 0 36px;
  padding: 28px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.arch-layer { margin-bottom: 10px; }
.arch-layer__label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-tertiary);
  margin-bottom: 8px;
}
.arch-layer__items {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.arch-block {
  padding: 10px 14px;
  border-radius: var(--radius-xs);
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid;
  flex: 1;
  min-width: 100px;
  text-align: center;
  transition: var(--transition);
}
.arch-block:hover { transform: translateY(-1px); box-shadow: var(--shadow-xs); }
.arch-block small { display: block; font-weight: 400; font-size: 0.66rem; opacity: 0.7; margin-top: 2px; }
.arch-block--blue { background: var(--primary-bg); border-color: var(--primary-border); color: var(--primary); }
.arch-block--green { background: var(--green-bg); border-color: var(--green-border); color: var(--green); }
.arch-block--purple { background: var(--purple-bg); border-color: rgba(124,58,237,0.2); color: var(--purple); }
.arch-block--gray { background: var(--bg); border-color: var(--border); color: var(--text); }
.arch-block--dark { background: var(--bg-tertiary); border-color: var(--border); color: var(--text-secondary); }

[data-theme="dark"] .arch-block--blue { background: rgba(99,102,241,0.1); border-color: rgba(99,102,241,0.2); color: var(--primary-light); }
[data-theme="dark"] .arch-block--green { background: rgba(52,211,153,0.1); border-color: rgba(52,211,153,0.2); color: var(--green); }
[data-theme="dark"] .arch-block--purple { background: rgba(167,139,250,0.1); border-color: rgba(167,139,250,0.2); color: var(--purple); }

.arch-arrow {
  text-align: center;
  font-size: 1.2rem;
  color: var(--text-tertiary);
  padding: 4px 0;
}

/* ======== ACCORDION ======== */
.accordion { margin: 24px 0; }
.accordion__item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  overflow: hidden;
  transition: var(--transition);
}
.accordion__item:hover { border-color: var(--primary-border); }
.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--bg-secondary);
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--heading);
  transition: var(--transition);
}
.accordion__trigger:hover { background: var(--bg-tertiary); }
.accordion__trigger svg {
  transition: transform 0.25s ease;
  color: var(--text-tertiary);
}
.accordion__item.open .accordion__trigger svg { transform: rotate(180deg); }
.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.accordion__item.open .accordion__content { max-height: 800px; }
.accordion__content ul {
  padding: 16px 24px;
  margin: 0;
  list-style: none;
}
.accordion__content li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.accordion__content li:last-child { border-bottom: none; }
.accordion__content li strong { color: var(--heading); }

/* ======== ORG CHART ======== */
.org-chart-modern { text-align: center; margin: 28px 0; }
.org-level { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-bottom: 12px; position: relative; }
.org-level::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  width: 1px;
  height: 6px;
  background: var(--border);
}
.org-level:first-child::before { display: none; }
.org-node {
  padding: 10px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--heading);
  transition: var(--transition);
}
.org-node:hover { border-color: var(--primary-border); box-shadow: var(--shadow-xs); }
.org-node--primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.org-node--accent {
  background: var(--primary-bg);
  border-color: var(--primary-border);
  color: var(--primary);
}
.org-node--sm { padding: 7px 14px; font-size: 0.75rem; }

/* ======== PERSONA CARDS ======== */
.persona-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 24px 0;
}
.persona-card {
  padding: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.persona-card:hover { border-color: var(--primary-border); box-shadow: var(--shadow-sm); }
.persona-card__header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.persona-card__avatar {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
}
.persona-card__avatar--blue { background: var(--primary-bg); }
.persona-card__avatar--green { background: var(--green-bg); }
.persona-card__avatar--purple { background: var(--purple-bg); }
.persona-card__avatar--yellow { background: var(--yellow-bg); }
.persona-card__name { font-weight: 700; font-size: 0.92rem; color: var(--heading); }
.persona-card__role { font-size: 0.75rem; color: var(--text-secondary); }
.persona-card p { font-size: 0.84rem; color: var(--text-secondary); margin: 0 0 10px; line-height: 1.6; }
.persona-card__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  padding: 3px 10px;
  font-size: 0.68rem;
  font-weight: 600;
  border-radius: 100px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.tag--primary { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-border); }
.tag--green { background: var(--green-bg); color: var(--green); border-color: var(--green-border); }

/* ======== PLACEHOLDER NOTICE ======== */
.placeholder-notice {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 28px;
  background: var(--bg-secondary);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}
.placeholder-notice svg { flex-shrink: 0; margin-top: 2px; color: var(--text-tertiary); }
.placeholder-notice p { margin: 0; font-size: 0.9rem; }

/* ======== FOOTER ======== */
.doc-footer {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.doc-footer__inner { text-align: center; }
.doc-footer p {
  font-size: 0.76rem;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

/* ======== RESPONSIVE ======== */
@media (max-width: 1200px) {
  .toc-sidebar { display: none; }
}

@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
  .sidebar-toggle { display: flex; }
  .main { margin-left: 0; }
  .content { padding: 28px 20px 60px; }
  .info-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: 1fr; }
  .persona-grid { grid-template-columns: 1fr; }
  .search-box { min-width: 160px; }
  .search-box kbd { display: none; }
  .cover__title { font-size: 2.4rem; }
}

@media (max-width: 600px) {
  .info-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .info-card { padding: 14px; }
  .info-card__value { font-size: 1.2rem; }
  .cover__meta { gap: 20px; }
  .arch-layer__items { flex-direction: column; }
  .arch-block { min-width: auto; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* Selection */
::selection { background: var(--primary-bg); color: var(--primary); }