/* ═══════════════════════════════════════════════════════════════
   SOVEREIGN DESIGN SYSTEM — OBSIDIAN × CHAMPAGNE GOLD
   AAA-Grade Intelligence Publication
═══════════════════════════════════════════════════════════════ */
:root {
  /* Obsidian Depth Scale */
  --obs-950: #050709;
  --obs-900: #080a0e;
  --obs-850: #0a0d12;
  --obs-800: #0d1117;
  --obs-750: #10151c;
  --obs-700: #131920;
  --obs-650: #161e27;
  --obs-600: #1a2230;
  --obs-500: #1e2a3a;
  --obs-400: #243344;
  --obs-300: #2d3f52;
  --obs-200: #3a4f64;

  /* Champagne Gold Spectrum */
  --gold-950: #5c4a1a;
  --gold-900: #6e5820;
  --gold-800: #876e2e;
  --gold-700: #9e8238;
  --gold-600: #a8893c;
  --gold-500: #c9a84c;
  --gold-400: #d4ae5c;
  --gold-300: #dfc070;
  --gold-200: #e2c97a;
  --gold-100: #eedd9a;
  --gold-50:  #f5edcc;

  /* Semantic Tokens */
  --gold-pure:   var(--gold-500);
  --gold-bright: var(--gold-400);
  --gold-light:  var(--gold-200);
  --gold-pale:   var(--gold-100);
  --gold-dim:    var(--gold-600);
  --gold-deep:   var(--gold-800);

  /* Alpha Tokens */
  --gold-a12:  rgba(201,168,76,0.12);
  --gold-a08:  rgba(201,168,76,0.08);
  --gold-a06:  rgba(201,168,76,0.06);
  --gold-a04:  rgba(201,168,76,0.04);
  --gold-a02:  rgba(201,168,76,0.02);
  --gold-a40:  rgba(201,168,76,0.40);
  --gold-a25:  rgba(201,168,76,0.25);
  --gold-a20:  rgba(201,168,76,0.20);
  --gold-a15:  rgba(201,168,76,0.15);

  /* Cream & Neutral */
  --cream-100: #f7f3ec;
  --cream-200: #ede5d3;
  --cream-300: #ddd0b8;
  --cream-400: #c8b99a;
  --slate-500: #5e7a92;
  --slate-400: #7a95ae;
  --slate-300: #96afc5;
  --slate-200: #b5cad9;
  --white:     #ffffff;

  /* Type System */
  --font-display:    'Big Caslon', 'Palatino', 'Palatino Linotype', 'Times New Roman', serif;
  --font-decorative: 'Big Caslon', 'Palatino', 'Palatino Linotype', 'Times New Roman', serif;
  --font-body:       'Baskerville', 'Palatino', 'Palatino Linotype', 'Georgia', 'Times New Roman', serif;
  --font-prose:      'Cochin', 'Baskerville', 'Georgia', serif;
  --font-sans:       'Avenir Next', 'Helvetica Neue', 'Segoe UI', Roboto, 'Noto Sans', Arial, sans-serif;

  /* Motion */
  --ease-sovereign: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-smooth:    cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Geometry */
  --sidebar-w: 256px;
  --content-max: 900px;
  --section-pad: 88px;
}

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

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

body {
  background: var(--obs-800);
  color: var(--cream-200);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ════════════════════════════════════════
   SCROLL PROGRESS — Sovereign Rail
════════════════════════════════════════ */
#progress-rail {
  position: fixed;
  top: 0; left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg,
    var(--gold-deep) 0%,
    var(--gold-pure) 35%,
    var(--gold-light) 65%,
    var(--gold-pale) 100%);
  z-index: 9999;
  transition: width 0.08s linear;
  box-shadow: 0 0 16px rgba(201,168,76,0.5), 0 0 32px rgba(201,168,76,0.2);
}

#progress-rail::after {
  content: '';
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  width: 6px; height: 6px;
  background: var(--gold-pale);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--gold-light);
}

/* ════════════════════════════════════════
   SIDEBAR — Sovereign Navigation
════════════════════════════════════════ */
#sidebar {
  position: fixed;
  left: 0; top: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--obs-900);
  border-right: 1px solid rgba(201,168,76,0.12);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform 0.45s var(--ease-sovereign);
  overflow: hidden;
}

/* Gradient border top */
#sidebar::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold-pure), transparent);
}

/* Corner ornament */
#sidebar::after {
  content: '';
  position: absolute;
  bottom: 0; right: 0;
  width: 80px; height: 80px;
  border-top: 1px solid rgba(201,168,76,0.08);
  border-left: 1px solid rgba(201,168,76,0.08);
  pointer-events: none;
}

.sidebar-brand {
  padding: 36px 28px 28px;
  border-bottom: 1px solid rgba(201,168,76,0.08);
  position: relative;
}

.brand-series {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.5em;
  color: var(--gold-dim);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-series::before {
  content: '';
  width: 20px; height: 1px;
  background: var(--gold-dim);
}

.brand-logo {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--gold-pure);
  letter-spacing: 0.12em;
  line-height: 1.5;
  text-transform: uppercase;
}

.brand-edition {
  margin-top: 8px;
  font-family: var(--font-sans);
  font-size: 8px;
  letter-spacing: 0.25em;
  color: var(--obs-200);
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid rgba(201,168,76,0.15);
  display: inline-block;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 24px 0 16px;
}

.sidebar-nav::-webkit-scrollbar { width: 1px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--gold-deep); }

.nav-section-label {
  font-family: var(--font-sans);
  font-size: 7.5px;
  font-weight: 600;
  letter-spacing: 0.4em;
  color: var(--obs-200);
  text-transform: uppercase;
  padding: 0 28px;
  margin: 16px 0 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 28px;
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.06em;
  color: var(--slate-400);
  transition: all 0.3s var(--ease-smooth);
  border-left: 2px solid transparent;
  position: relative;
}

.nav-link .nav-num {
  font-family: var(--font-display);
  font-size: 8.5px;
  color: var(--obs-200);
  min-width: 18px;
  letter-spacing: 0.08em;
  transition: color 0.3s;
}

.nav-link .nav-label { flex: 1; line-height: 1.3; }

.nav-link:hover {
  color: var(--gold-light);
  border-left-color: var(--gold-a40);
  background: var(--gold-a04);
  padding-left: 32px;
}

.nav-link:hover .nav-num { color: var(--gold-dim); }

.nav-link.active {
  color: var(--gold-pure);
  border-left-color: var(--gold-pure);
  background: var(--gold-a06);
}

.nav-link.active .nav-num { color: var(--gold-pure); }

/* Active pip */
.nav-link.active::after {
  content: '';
  position: absolute;
  right: 20px; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 4px;
  background: var(--gold-pure);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--gold-pure);
}

.sidebar-footer {
  padding: 20px 28px 28px;
  border-top: 1px solid rgba(201,168,76,0.08);
}

.sidebar-footer p {
  font-family: var(--font-sans);
  font-size: 8px;
  letter-spacing: 0.12em;
  color: var(--obs-200);
  text-transform: uppercase;
  line-height: 1.8;
}

.sidebar-footer .footer-mark {
  display: block;
  width: 24px; height: 1px;
  background: linear-gradient(90deg, var(--gold-deep), transparent);
  margin-bottom: 10px;
}

/* ════════════════════════════════════════
   MAIN CONTENT AREA
════════════════════════════════════════ */
#main {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

/* ════════════════════════════════════════
   COVER — Full-screen Sovereign Hero
════════════════════════════════════════ */
#cover {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 100px 0 96px;
  overflow: hidden;
  background: var(--obs-900);
}

/* Layered atmospheric background */
.cover-atmosphere {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cover-atmosphere::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 120% 80% at 50% 50%, rgba(201,168,76,0.03) 0%, transparent 60%),
    radial-gradient(ellipse 60% 100% at 100% 50%, rgba(13,17,23,0.8) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 0% 0%, rgba(201,168,76,0.02) 0%, transparent 50%);
}

/* Constellation field */
.starfield {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.starfield canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
}

/* Vertical gold rule right side */
.cover-vr {
  position: absolute;
  right: 180px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg,
    transparent 0%,
    rgba(201,168,76,0.06) 20%,
    rgba(201,168,76,0.15) 50%,
    rgba(201,168,76,0.06) 80%,
    transparent 100%);
}

/* Geometric compass rose — top right */
.cover-compass {
  position: absolute;
  top: 48px; right: 48px;
  width: 200px; height: 200px;
  opacity: 0.07;
  animation: compassRotate 120s linear infinite;
}

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

/* Corner accent marks */
.cover-corner-tl,
.cover-corner-br {
  position: absolute;
  width: 48px; height: 48px;
  pointer-events: none;
}

.cover-corner-tl {
  top: 32px; left: 0;
  border-top: 1px solid rgba(201,168,76,0.3);
  border-right: 1px solid rgba(201,168,76,0.3);
}

.cover-corner-br {
  bottom: 32px; right: 0;
  border-bottom: 1px solid rgba(201,168,76,0.3);
  border-left: 1px solid rgba(201,168,76,0.3);
}

/* Issue number watermark */
.cover-watermark {
  position: absolute;
  right: 48px; bottom: 48px;
  font-family: var(--font-decorative);
  font-size: 144px;
  font-weight: 900;
  color: rgba(201,168,76,0.04);
  line-height: 1;
  letter-spacing: -0.04em;
  user-select: none;
  pointer-events: none;
}

/* ── Cover Content ── */
.cover-content {
  position: relative;
  z-index: 10;
  max-width: 860px;
}

.cover-issue {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 52px;
  animation: fadeSlideUp 1.4s var(--ease-sovereign) 0.1s both;
}

.cover-issue-line {
  width: 56px; height: 1px;
  background: linear-gradient(90deg, var(--gold-pure), transparent);
}

.cover-issue-text {
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.5em;
  color: var(--gold-dim);
  text-transform: uppercase;
}

.cover-eyebrow {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.35em;
  color: var(--gold-pure);
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 20px;
  animation: fadeSlideUp 1.4s var(--ease-sovereign) 0.2s both;
}

.cover-title-vn {
  font-family: var(--font-decorative);
  font-size: clamp(32px, 4.5vw, 60px);
  font-weight: 700;
  color: var(--gold-pure);
  letter-spacing: 0.08em;
  line-height: 1.05;
  text-transform: uppercase;
  margin-bottom: 6px;
  text-shadow: 0 0 80px rgba(201,168,76,0.15);
  animation: fadeSlideUp 1.4s var(--ease-sovereign) 0.3s both;
}

.cover-title-rule {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, rgba(201,168,76,0.4) 0%, rgba(201,168,76,0.1) 60%, transparent 100%);
  margin: 20px 0;
  animation: expandRule 1.6s var(--ease-sovereign) 0.5s both;
  transform-origin: left;
}

@keyframes expandRule {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

.cover-title-en {
  font-family: var(--font-body);
  font-size: clamp(13px, 1.6vw, 19px);
  font-weight: 300;
  font-style: italic;
  color: var(--slate-300);
  letter-spacing: 0.05em;
  margin-bottom: 32px;
  animation: fadeSlideUp 1.4s var(--ease-sovereign) 0.55s both;
}

.cover-subtitle {
  font-family: var(--font-body);
  font-size: clamp(14px, 1.5vw, 17px);
  font-weight: 300;
  font-style: italic;
  color: var(--cream-300);
  letter-spacing: 0.03em;
  line-height: 1.75;
  max-width: 620px;
  border-left: 2px solid var(--gold-pure);
  padding-left: 28px;
  position: relative;
  animation: fadeSlideUp 1.4s var(--ease-sovereign) 0.7s both;
}

/* Provenance strip */
.cover-meta {
  margin-top: 72px;
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 0;
  width: fit-content;
  border: 1px solid rgba(201,168,76,0.15);
  animation: fadeSlideUp 1.4s var(--ease-sovereign) 0.9s both;
}

.cover-meta-item {
  padding: 16px 32px;
  border-right: 1px solid rgba(201,168,76,0.1);
}

.cover-meta-item:last-child { border-right: none; }

.cover-meta-label {
  font-family: var(--font-sans);
  font-size: 7.5px;
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--gold-deep);
  text-transform: uppercase;
  margin-bottom: 5px;
  display: block;
}

.cover-meta-value {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 500;
  color: var(--slate-200);
  letter-spacing: 0.08em;
  display: block;
}

/* Classification banner */
.cover-classification {
  position: absolute;
  top: 40px; left: 96px;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 10;
  animation: fadeSlideUp 1.4s var(--ease-sovereign) 0s both;
}

.classification-badge {
  font-family: var(--font-sans);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  padding: 4px 12px;
  border: 1px solid rgba(201,168,76,0.35);
  color: var(--gold-dim);
  background: rgba(201,168,76,0.05);
}

.classification-id {
  font-family: var(--font-display);
  font-size: 9px;
  color: var(--obs-200);
  letter-spacing: 0.2em;
}

/* ════════════════════════════════════════
   CONTENT SECTIONS
════════════════════════════════════════ */
.content-section {
  padding: var(--section-pad) 96px;
  border-bottom: 1px solid rgba(201,168,76,0.06);
  position: relative;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s var(--ease-sovereign), transform 0.9s var(--ease-sovereign);
}

.content-section::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, transparent, var(--gold-a08), transparent);
  opacity: 0;
  transition: opacity 0.6s ease;
}

.content-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.content-section.visible::before {
  opacity: 1;
}

/* ── Section Header ── */
.section-header {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 40px;
  margin-bottom: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(201,168,76,0.1);
  align-items: start;
}

.section-numeral-block {
  position: relative;
  padding-top: 4px;
}

.section-roman-small {
  font-family: var(--font-sans);
  font-size: 7.5px;
  font-weight: 600;
  letter-spacing: 0.4em;
  color: var(--gold-deep);
  text-transform: uppercase;
  display: block;
  margin-bottom: 6px;
}

.section-numeral {
  font-family: var(--font-display);
  font-size: 72px;
  font-weight: 700;
  color: rgba(201,168,76,0.07);
  line-height: 1;
  letter-spacing: -0.02em;
  display: block;
}

.section-numeral-dot {
  width: 6px; height: 6px;
  background: var(--gold-deep);
  border-radius: 50%;
  margin-top: 8px;
}

.chapter-tag {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.4em;
  color: var(--gold-pure);
  text-transform: uppercase;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.chapter-tag::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--gold-a40), transparent);
  max-width: 200px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.8vw, 34px);
  font-weight: 600;
  color: var(--cream-100);
  letter-spacing: 0.06em;
  line-height: 1.2;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.section-lead {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 300;
  font-style: italic;
  color: var(--slate-300);
  line-height: 1.75;
  max-width: 700px;
}

/* ════════════════════════════════════════
   TYPOGRAPHY — Body & Prose
════════════════════════════════════════ */
.prose {
  max-width: var(--content-max);
}

.prose p {
  font-family: var(--font-body);
  font-size: 17.5px;
  font-weight: 300;
  line-height: 1.95;
  color: var(--cream-200);
  margin-bottom: 26px;
  letter-spacing: 0.015em;
}

.prose p:last-child { margin-bottom: 0; }

.prose strong {
  font-weight: 600;
  color: var(--cream-100);
}

.prose .drop-cap::first-letter {
  font-family: var(--font-decorative);
  font-size: 4.2em;
  font-weight: 700;
  color: var(--gold-pure);
  float: left;
  line-height: 0.75;
  margin: 8px 12px 0 0;
  text-shadow: 0 0 30px rgba(201,168,76,0.2);
}

/* ── Sub-headings ── */
.sub-heading {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  color: var(--gold-pure);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 56px 0 24px;
  padding: 0 0 0 24px;
  border-left: 2px solid var(--gold-pure);
  display: flex;
  align-items: center;
  gap: 16px;
}

.sub-heading .sub-num {
  font-size: 9px;
  color: var(--gold-deep);
  font-weight: 400;
  letter-spacing: 0.15em;
}

/* ════════════════════════════════════════
   PULL QUOTE — Sovereign Edition
════════════════════════════════════════ */
.pullquote {
  position: relative;
  margin: 56px 0;
  padding: 44px 52px 44px 72px;
  background: linear-gradient(135deg, var(--gold-a08) 0%, var(--gold-a02) 100%);
  border: 1px solid rgba(201,168,76,0.2);
  border-left: none;
  overflow: hidden;
}

.pullquote::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--gold-pure), var(--gold-deep));
}

.pullquote::after {
  content: '\201C';
  position: absolute;
  top: 8px; left: 36px;
  font-family: var(--font-decorative);
  font-size: 96px;
  color: var(--gold-deep);
  line-height: 1;
  opacity: 0.5;
}

/* Top-right decorative mark */
.pullquote .pq-mark {
  position: absolute;
  top: 16px; right: 24px;
  font-family: var(--font-sans);
  font-size: 7px;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--gold-deep);
  text-transform: uppercase;
}

.pullquote p {
  font-family: var(--font-body);
  font-size: 20px !important;
  font-style: italic;
  font-weight: 400 !important;
  color: var(--gold-light) !important;
  line-height: 1.7;
  letter-spacing: 0.02em;
  margin: 0 !important;
  position: relative;
  z-index: 1;
}

.pullquote-source {
  margin-top: 16px;
  font-family: var(--font-sans);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--gold-deep);
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

/* ════════════════════════════════════════
   DATA TABLES — AAA Grade
════════════════════════════════════════ */
.table-wrap {
  margin: 48px 0;
  overflow-x: auto;
}

.table-caption {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--gold-dim);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.table-caption::before {
  content: '';
  width: 24px; height: 1px;
  background: var(--gold-dim);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 12px;
}

.data-table thead tr {
  border-top: 1px solid rgba(201,168,76,0.25);
  border-bottom: 2px solid rgba(201,168,76,0.35);
}

.data-table thead th {
  padding: 16px 22px;
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--gold-pure);
  text-transform: uppercase;
  text-align: left;
  background: linear-gradient(180deg, var(--gold-a06) 0%, var(--gold-a02) 100%);
  white-space: nowrap;
}

.data-table tbody tr {
  border-bottom: 1px solid rgba(201,168,76,0.055);
  transition: background 0.25s ease;
}

.data-table tbody tr:hover {
  background: var(--gold-a04);
}

.data-table tbody td {
  padding: 15px 22px;
  color: var(--cream-200);
  font-weight: 300;
  letter-spacing: 0.02em;
  line-height: 1.5;
  vertical-align: top;
}

.data-table tbody td:first-child {
  color: var(--cream-100);
  font-weight: 400;
  font-size: 12.5px;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 7.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border-radius: 1px;
}

.badge-gold    { background: var(--gold-a15); color: var(--gold-light);  border: 1px solid rgba(201,168,76,0.32); }
.badge-slate   { background: rgba(120,149,174,0.1); color: var(--slate-200); border: 1px solid rgba(120,149,174,0.22); }
.badge-dim     { background: rgba(255,255,255,0.03); color: var(--slate-400); border: 1px solid rgba(255,255,255,0.07); }
.badge-alert   { background: rgba(180,100,60,0.12); color: #d4907a; border: 1px solid rgba(180,100,60,0.25); }

/* ════════════════════════════════════════
   FRAMEWORK CARDS — 3-col
════════════════════════════════════════ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 44px 0;
}

.card {
  background: var(--obs-750);
  border: 1px solid rgba(201,168,76,0.1);
  border-top: 2px solid var(--gold-pure);
  padding: 36px 30px;
  position: relative;
  transition: all 0.35s var(--ease-smooth);
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-a15), transparent);
  transform: scaleX(0);
  transition: transform 0.4s var(--ease-sovereign);
}

.card:hover {
  border-color: rgba(201,168,76,0.25);
  border-top-color: var(--gold-bright);
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4), 0 0 0 1px var(--gold-a08);
}

.card:hover::after { transform: scaleX(1); }

.card-num {
  font-family: var(--font-sans);
  font-size: 7.5px;
  font-weight: 700;
  letter-spacing: 0.35em;
  color: var(--gold-deep);
  text-transform: uppercase;
  display: block;
  margin-bottom: 14px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  color: var(--gold-pure);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 18px;
  line-height: 1.45;
}

.card-body {
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 300;
  color: var(--slate-300);
  line-height: 1.75;
}

/* ════════════════════════════════════════
   COMPARISON — Split Analysis
════════════════════════════════════════ */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 44px 0;
  border: 1px solid rgba(201,168,76,0.1);
  position: relative;
}

/* Central VS divider */
.comparison-grid::before {
  content: 'VS';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: var(--obs-800);
  border: 1px solid rgba(201,168,76,0.2);
  color: var(--gold-deep);
  font-family: var(--font-display);
  font-size: 8px;
  letter-spacing: 0.15em;
  padding: 8px 10px;
  z-index: 10;
}

.comparison-col {
  padding: 44px 40px;
  background: var(--obs-750);
}

.comparison-col:first-child {
  border-right: 1px solid rgba(201,168,76,0.1);
  border-top: 2px solid var(--obs-200);
}

.comparison-col:last-child {
  border-top: 2px solid var(--gold-pure);
}

.comparison-header {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(201,168,76,0.15);
}

.comparison-col:first-child .comparison-header { color: var(--slate-300); }
.comparison-col:last-child .comparison-header  { color: var(--gold-pure); }

.comparison-row {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 22px;
}

.comparison-label {
  font-family: var(--font-sans);
  font-size: 7.5px;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--gold-deep);
  text-transform: uppercase;
}

.comparison-value {
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 300;
  color: var(--cream-200);
  line-height: 1.55;
}

.comparison-value.highlight {
  color: var(--gold-light);
  font-weight: 400;
}

/* ════════════════════════════════════════
   PILLAR LIST — Alignment Architecture
════════════════════════════════════════ */
.pillar-list {
  list-style: none;
  margin: 36px 0;
}

.pillar-list li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid rgba(201,168,76,0.07);
  align-items: start;
  transition: background 0.3s ease;
}

.pillar-list li:last-child { border-bottom: none; }

.pillar-icon {
  width: 52px; height: 52px;
  border: 1px solid rgba(201,168,76,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--gold-pure);
  flex-shrink: 0;
  position: relative;
  background: var(--gold-a04);
  transition: all 0.3s var(--ease-smooth);
}

.pillar-list li:hover .pillar-icon {
  background: var(--gold-a12);
  border-color: rgba(201,168,76,0.5);
  box-shadow: 0 0 20px rgba(201,168,76,0.1);
}

.pillar-term {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  color: var(--cream-100);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.pillar-def {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 300;
  color: var(--slate-300);
  line-height: 1.75;
}

/* ════════════════════════════════════════
   INTELLIGENCE SPECTRUM BAR — New Visual
════════════════════════════════════════ */
.spectrum-visual {
  margin: 48px 0;
  padding: 40px;
  background: var(--obs-850);
  border: 1px solid var(--gold-a12);
  position: relative;
}

.spectrum-title {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--gold-dim);
  text-transform: uppercase;
  margin-bottom: 32px;
}

.spectrum-track {
  position: relative;
  height: 4px;
  background: var(--obs-600);
  margin-bottom: 48px;
  border-radius: 2px;
}

.spectrum-fill {
  position: absolute;
  left: 0; top: 0;
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg,
    var(--slate-500) 0%,
    var(--gold-deep) 25%,
    var(--gold-pure) 60%,
    var(--gold-pale) 80%,
    rgba(255,255,255,0.8) 100%);
  width: 100%;
}

.spectrum-nodes {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.spectrum-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
}

.spectrum-node::before {
  content: '';
  position: absolute;
  bottom: 100%;
  margin-bottom: 4px;
  width: 1px;
  height: 16px;
  background: rgba(201,168,76,0.3);
}

.spectrum-node-label {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.spectrum-node-sub {
  font-family: var(--font-sans);
  font-size: 8px;
  letter-spacing: 0.15em;
  color: var(--obs-200);
  text-align: center;
  text-transform: uppercase;
}

.node-ani    { color: var(--slate-300); }
.node-agi    { color: var(--gold-dim); }
.node-asi    { color: var(--gold-pure); }
.node-cosmic { color: var(--gold-pale); }
.node-omega  { color: rgba(255,255,255,0.6); }

/* ════════════════════════════════════════
   RISK MATRIX — New Visual
════════════════════════════════════════ */
.risk-matrix {
  display: grid;
  grid-template-columns: auto repeat(3, 1fr);
  gap: 2px;
  margin: 44px 0;
  font-family: var(--font-sans);
  font-size: 10px;
}

.risk-header {
  background: var(--gold-a08);
  border: 1px solid var(--gold-a15);
  padding: 12px 16px;
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--gold-dim);
  text-transform: uppercase;
  text-align: center;
}

.risk-row-label {
  background: var(--obs-750);
  border: 1px solid var(--gold-a08);
  padding: 12px 16px;
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gold-dim);
  text-transform: uppercase;
  writing-mode: horizontal-tb;
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.risk-cell {
  border: 1px solid var(--gold-a08);
  padding: 14px 16px;
  font-size: 10.5px;
  font-weight: 300;
  color: var(--cream-200);
  line-height: 1.4;
  letter-spacing: 0.02em;
  background: var(--obs-750);
  transition: background 0.2s;
}

.risk-cell:hover { background: var(--gold-a04); }

.risk-cell.low    { border-left: 2px solid rgba(100,180,100,0.4); }
.risk-cell.medium { border-left: 2px solid rgba(200,160,60,0.6); }
.risk-cell.high   { border-left: 2px solid rgba(200,80,60,0.6); }

/* ════════════════════════════════════════
   RESEARCH QUESTIONS
════════════════════════════════════════ */
.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 44px 0;
}

.research-item {
  background: var(--obs-750);
  border: 1px solid rgba(201,168,76,0.08);
  padding: 32px;
  position: relative;
  transition: all 0.35s var(--ease-smooth);
  overflow: hidden;
}

.research-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 3px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold-pure));
  transition: width 0.45s var(--ease-sovereign);
}

.research-item:hover {
  border-color: rgba(201,168,76,0.2);
  background: var(--obs-650);
}

.research-item:hover::before { width: 100%; }

.research-num {
  font-family: var(--font-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--gold-deep);
  text-transform: uppercase;
  display: block;
  margin-bottom: 14px;
}

.research-q {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 300;
  font-style: italic;
  color: var(--cream-200);
  line-height: 1.7;
}

/* ════════════════════════════════════════
   TIMELINE — Chapter 7
════════════════════════════════════════ */
.timeline {
  position: relative;
  margin: 44px 0;
  padding-left: 48px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg,
    var(--gold-pure) 0%,
    var(--gold-deep) 60%,
    transparent 100%);
}

.timeline-item {
  position: relative;
  padding: 0 0 48px 44px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px; top: 4px;
  width: 11px; height: 11px;
  background: var(--gold-pure);
  border: 2px solid var(--obs-800);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--gold-a15), 0 0 16px rgba(201,168,76,0.4);
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-year {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--gold-pure);
  letter-spacing: 0.2em;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.timeline-event {
  font-family: var(--font-body);
  font-size: 16.5px;
  font-weight: 300;
  color: var(--cream-200);
  line-height: 1.7;
  margin-bottom: 6px;
}

.timeline-source {
  font-family: var(--font-sans);
  font-size: 9.5px;
  font-weight: 300;
  color: var(--slate-400);
  letter-spacing: 0.06em;
  font-style: italic;
}

/* ════════════════════════════════════════
   CONCLUSION BOX
════════════════════════════════════════ */
.conclusion-box {
  background: linear-gradient(135deg, var(--gold-a08) 0%, var(--gold-a02) 100%);
  border: 1px solid rgba(201,168,76,0.22);
  padding: 56px 60px;
  margin: 56px 0;
  position: relative;
  overflow: hidden;
}

/* Decorative corner marks */
.conclusion-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-pure), var(--gold-bright), transparent);
}

.conclusion-box::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-a40), transparent);
}

.conclusion-box .box-corner-mark {
  position: absolute;
  font-family: var(--font-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--gold-deep);
  text-transform: uppercase;
}

.conclusion-box .box-corner-mark.tl { top: 20px; left: 28px; }
.conclusion-box .box-corner-mark.tr { top: 20px; right: 28px; }

.conclusion-title {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.4em;
  color: var(--gold-pure);
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.conclusion-title::before {
  content: '';
  width: 32px; height: 1px;
  background: var(--gold-pure);
}

.conclusion-body {
  font-family: var(--font-body);
  font-size: 19px;
  font-weight: 300;
  color: var(--cream-100);
  line-height: 1.9;
  letter-spacing: 0.01em;
}

/* ════════════════════════════════════════
   DIVIDERS
════════════════════════════════════════ */
.gold-rule {
  width: 80px; height: 1px;
  background: linear-gradient(90deg, var(--gold-pure), transparent);
  margin: 36px 0;
}

.section-rule {
  width: 100%; height: 1px;
  background: linear-gradient(90deg, var(--gold-a20), transparent 60%);
  margin: 44px 0;
}

.diamond-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 40px 0;
}

.diamond-divider::before,
.diamond-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-a25));
}

.diamond-divider::after {
  background: linear-gradient(90deg, var(--gold-a25), transparent);
}

.diamond-divider span {
  width: 6px; height: 6px;
  background: var(--gold-pure);
  transform: rotate(45deg);
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(201,168,76,0.4);
}

/* ════════════════════════════════════════
   STAT CALLOUT — Inline Data Point
════════════════════════════════════════ */
.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 44px 0;
  background: var(--gold-a08);
  border: 1px solid var(--gold-a12);
}

.stat-cell {
  background: var(--obs-800);
  padding: 28px 32px;
  text-align: center;
  transition: background 0.3s ease;
}

.stat-cell:hover { background: var(--obs-750); }

.stat-value {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  color: var(--gold-pure);
  letter-spacing: -0.01em;
  line-height: 1;
  margin-bottom: 8px;
  display: block;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--obs-200);
  text-transform: uppercase;
  display: block;
}

.stat-desc {
  font-family: var(--font-body);
  font-size: 13px;
  font-style: italic;
  color: var(--slate-400);
  margin-top: 4px;
  display: block;
}

/* ════════════════════════════════════════
   COLOPHON
════════════════════════════════════════ */
#colophon {
  padding: 68px 96px;
  background: var(--obs-900);
  border-top: 1px solid rgba(201,168,76,0.15);
  position: relative;
}

#colophon::before {
  content: '';
  position: absolute;
  top: 0; left: 96px; right: 96px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-pure), transparent);
}

.colophon-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: end;
}

.colophon-text {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 300;
  color: var(--obs-200);
  line-height: 1.9;
  letter-spacing: 0.06em;
  max-width: 640px;
}

.colophon-text em { font-style: italic; color: var(--slate-400); }

.colophon-brand {
  text-align: right;
}

.colophon-logo {
  font-family: var(--font-decorative);
  font-size: 14px;
  font-weight: 700;
  color: var(--gold-deep);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  line-height: 1.6;
  margin-bottom: 6px;
}

.colophon-series {
  font-family: var(--font-sans);
  font-size: 7.5px;
  letter-spacing: 0.35em;
  color: var(--obs-300);
  text-transform: uppercase;
}

.colophon-marks {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  justify-content: flex-end;
}

.colophon-mark {
  width: 5px; height: 5px;
  background: var(--obs-200);
  border-radius: 50%;
}

/* ════════════════════════════════════════
   MOBILE TOGGLE
════════════════════════════════════════ */
#nav-toggle {
  display: none;
  position: fixed;
  top: 16px; left: 16px;
  z-index: 200;
  background: var(--obs-900);
  border: 1px solid rgba(201,168,76,0.3);
  padding: 10px 14px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--gold-pure);
  text-transform: uppercase;
  transition: all 0.3s ease;
}

#nav-toggle:hover {
  background: var(--gold-a08);
}

/* ════════════════════════════════════════
   ANIMATIONS
════════════════════════════════════════ */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulseGlow {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* ════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════ */
@media (max-width: 1200px) {
  .cards-grid { grid-template-columns: 1fr 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  #sidebar { transform: translateX(-100%); }
  #sidebar.open { transform: translateX(0); }
  #main { margin-left: 0; }
  #nav-toggle { display: block; }

  #cover { padding: 80px 36px 60px; }

  .content-section { padding: 64px 36px; }
  :root { --section-pad: 56px; }

  .section-header { grid-template-columns: 1fr; gap: 20px; }
  .section-numeral-block { display: none; }

  .cards-grid,
  .research-grid,
  .comparison-grid,
  .stat-row { grid-template-columns: 1fr; }

  .comparison-grid::before { display: none; }

  .cover-meta { grid-template-columns: 1fr 1fr; }

  #colophon { padding: 48px 36px; }
  .colophon-inner { grid-template-columns: 1fr; }
  .colophon-brand { text-align: left; }
  .colophon-marks { justify-content: flex-start; }
}

@media (max-width: 600px) {
  .cover-meta { grid-template-columns: 1fr; }
  .cover-meta-item { border-right: none; border-bottom: 1px solid rgba(201,168,76,0.1); }
  .cover-meta-item:last-child { border-bottom: none; }
  .cover-title-vn { font-size: 28px; }
}

/* Print */
@media print {
  #sidebar, #progress-rail, #nav-toggle { display: none !important; }
  #main { margin-left: 0; }
  .content-section { opacity: 1 !important; transform: none !important; page-break-inside: avoid; }
  body { background: white; color: #111; }
}
/* ════════════════════════════════════════════════════════
   KARDASHEV SCALE — Sovereign AAA Design Extension
════════════════════════════════════════════════════════ */

/* Section atmosphere */
.kardashev-section {
  position: relative;
  background: linear-gradient(180deg,
    var(--obs-800) 0%,
    var(--obs-850) 30%,
    var(--obs-900) 70%,
    var(--obs-850) 100%);
}

.kd-dot { background: var(--gold-pale); box-shadow: 0 0 12px var(--gold-light); }
.kd-tag { color: var(--gold-pale) !important; }

/* ── Universe Wrapper ── */
.kd-universe-wrapper {
  position: relative;
  margin: 44px 0 56px;
  padding: 48px 0;
  border: 1px solid rgba(201,168,76,0.12);
  background: var(--obs-850);
  overflow: hidden;
}

.kd-universe-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.kd-header-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 48px;
  margin-bottom: 36px;
}

.kd-header-eyebrow {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.45em;
  color: var(--gold-pure);
  text-transform: uppercase;
}

.kd-header-scale {
  font-family: var(--font-sans);
  font-size: 7.5px;
  font-weight: 400;
  letter-spacing: 0.25em;
  color: var(--obs-200);
  text-transform: uppercase;
  font-style: italic;
}

/* ── Energy Meter ── */
.kd-energy-meter {
  padding: 0 48px;
  margin-bottom: 40px;
}

.kd-energy-label {
  font-family: var(--font-sans);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--gold-deep);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.kd-energy-track {
  position: relative;
  height: 6px;
  background: var(--obs-700);
  border: 1px solid rgba(201,168,76,0.1);
}

.kd-energy-fill {
  height: 100%;
  background: linear-gradient(90deg,
    var(--gold-deep) 0%,
    var(--gold-pure) 50%,
    var(--gold-pale) 75%,
    rgba(245,237,204,0.6) 100%);
  width: 0%;
  transition: width 1.8s var(--ease-sovereign);
  box-shadow: 0 0 12px rgba(201,168,76,0.4);
  position: relative;
}

.kd-energy-fill::after {
  content: '';
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  width: 10px; height: 10px;
  background: var(--gold-pale);
  border-radius: 50%;
  box-shadow: 0 0 16px var(--gold-light), 0 0 32px rgba(201,168,76,0.3);
}

.kd-energy-nodes {
  position: relative;
  margin-top: 8px;
  height: 16px;
}

.kd-energy-tick {
  position: absolute;
  transform: translateX(-50%);
  font-family: var(--font-sans);
  font-size: 7px;
  letter-spacing: 0.05em;
  color: var(--obs-200);
}

/* ── Level Cards Grid ── */
.kd-levels-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  padding: 0 48px;
  background: rgba(201,168,76,0.06);
}

.kd-level-card {
  background: var(--obs-850);
  padding: 28px 20px 24px;
  cursor: pointer;
  transition: all 0.35s var(--ease-smooth);
  position: relative;
  border-top: 2px solid transparent;
}

.kd-level-card:hover,
.kd-level-card.kd-active {
  background: var(--obs-700);
  border-top-color: var(--gold-pure);
}

.kd-level-card.kd-active { border-top-color: var(--gold-pale); }

/* K levels color accent */
.kd-level-0 { --kd-accent: rgba(201,168,76,0.4); }
.kd-level-1 { --kd-accent: rgba(201,168,76,0.55); }
.kd-level-2 { --kd-accent: rgba(224,192,100,0.7); }
.kd-level-3 { --kd-accent: rgba(235,210,120,0.8); }
.kd-level-omega { --kd-accent: #F5EDCC; background: linear-gradient(180deg, rgba(201,168,76,0.08) 0%, var(--obs-850) 100%) !important; }

.kd-level-omega:hover, .kd-level-omega.kd-active {
  background: linear-gradient(180deg, rgba(201,168,76,0.15) 0%, var(--obs-750) 100%) !important;
}

.kd-level-badge {
  font-family: var(--font-display);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--kd-accent);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.kd-omega-badge {
  color: var(--gold-pale) !important;
  text-shadow: 0 0 12px rgba(245,237,204,0.4);
}

.kd-level-icon {
  width: 52px; height: 52px;
  margin-bottom: 16px;
  opacity: 0.7;
  transition: opacity 0.3s;
}

.kd-level-card:hover .kd-level-icon,
.kd-level-card.kd-active .kd-level-icon { opacity: 1; }

.kd-omega-icon { opacity: 1 !important; filter: drop-shadow(0 0 8px rgba(245,237,204,0.3)); }

.kd-level-name {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  color: var(--cream-100);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
  line-height: 1.3;
}

.kd-omega-name { color: var(--gold-pale); text-shadow: 0 0 20px rgba(245,237,204,0.25); }

.kd-level-energy {
  font-family: var(--font-sans);
  font-size: 9.5px;
  font-weight: 600;
  color: var(--kd-accent);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.kd-omega-energy {
  color: var(--gold-pale);
  font-size: 11px !important;
  text-shadow: 0 0 12px rgba(245,237,204,0.3);
}

.kd-level-era {
  font-family: var(--font-sans);
  font-size: 7.5px;
  letter-spacing: 0.2em;
  color: var(--slate-400);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.kd-level-desc {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 300;
  color: var(--cream-300);
  line-height: 1.75;
  margin-bottom: 14px;
}

.kd-level-asi {
  padding: 10px 12px;
  background: rgba(201,168,76,0.04);
  border-left: 2px solid rgba(201,168,76,0.2);
  font-family: var(--font-sans);
  font-size: 10px;
  line-height: 1.6;
  color: var(--slate-300);
}

.kd-asi-label {
  display: block;
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--gold-deep);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.kd-level-pip {
  position: absolute;
  bottom: 16px; right: 16px;
  font-family: var(--font-sans);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gold-pure);
  text-transform: uppercase;
}

.kd-omega-mark {
  position: absolute;
  bottom: 16px; right: 16px;
  font-family: var(--font-sans);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--gold-pale);
  text-transform: uppercase;
  text-shadow: 0 0 8px rgba(245,237,204,0.4);
}

/* ── Extended K Levels ── */
.kd-extended-grid {
  margin-top: 2px;
  padding: 28px 48px;
  background: var(--obs-900);
  border-top: 1px solid rgba(201,168,76,0.08);
}

.kd-ext-header {
  font-family: var(--font-sans);
  font-size: 7.5px;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--gold-deep);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.kd-ext-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.kd-ext-card {
  padding: 20px 24px;
  border: 1px solid rgba(201,168,76,0.08);
  background: var(--obs-850);
}

.kd-ext-num {
  font-family: var(--font-display);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: rgba(201,168,76,0.4);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.kd-ext-name {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  color: var(--cream-200);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.kd-ext-desc {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 300;
  color: var(--slate-400);
  line-height: 1.75;
}

/* ── K Rows special ── */
.kd-row-current td { background: rgba(201,168,76,0.04); }
.kd-row-omega td {
  background: linear-gradient(90deg, rgba(201,168,76,0.08) 0%, rgba(201,168,76,0.03) 100%);
  color: var(--gold-pale) !important;
}
.kd-row-omega td strong { color: var(--gold-pale); }

.badge-omega {
  background: rgba(245,237,204,0.12);
  color: var(--gold-pale);
  border: 1px solid rgba(245,237,204,0.3);
  font-family: var(--font-sans);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.2em;
  padding: 3px 10px;
  text-transform: uppercase;
  text-shadow: 0 0 8px rgba(245,237,204,0.3);
}

/* ── Trajectory Steps ── */
.kd-trajectory {
  margin: 40px 0;
  padding: 40px 48px;
  background: var(--obs-850);
  border: 1px solid rgba(201,168,76,0.1);
  position: relative;
}

.kd-trajectory::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-pure), transparent);
}

.kd-traj-header {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--gold-pure);
  text-transform: uppercase;
  margin-bottom: 32px;
}

.kd-traj-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.kd-traj-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 28px;
  align-items: start;
  padding: 20px 0;
}

.kd-traj-connector {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 28px;
  height: 28px;
}

.kd-traj-connector span {
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, var(--gold-a25), transparent);
  margin-left: 25px;
}

.kd-traj-marker {
  width: 52px; height: 52px;
  background: var(--obs-700);
  border: 1px solid rgba(201,168,76,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--gold-pure);
  letter-spacing: 0.1em;
  flex-shrink: 0;
  border-radius: 0;
}

.kd-omega-marker {
  background: linear-gradient(135deg, rgba(201,168,76,0.2), rgba(201,168,76,0.05)) !important;
  border-color: var(--gold-pale) !important;
  color: var(--gold-pale) !important;
  font-size: 18px !important;
  text-shadow: 0 0 12px rgba(245,237,204,0.4);
}

.kd-traj-omega .kd-traj-content { border-left: 2px solid var(--gold-pale); padding-left: 20px; }

.kd-traj-title {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  color: var(--cream-100);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.kd-traj-timeline {
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--gold-deep);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.kd-traj-desc {
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 300;
  color: var(--cream-300);
  line-height: 1.85;
}

/* Fermi quote special */
.kd-fermi-quote {
  background: linear-gradient(135deg, rgba(201,168,76,0.06) 0%, rgba(201,168,76,0.01) 100%) !important;
  border-color: rgba(201,168,76,0.25) !important;
}

/* ── Dyson Sphere Visual ── */
.dyson-visual {
  margin: 32px 0;
  background: var(--obs-900);
  border: 1px solid rgba(201,168,76,0.1);
  overflow: hidden;
}

.dyson-container {
  position: relative;
}

#dysonCanvas {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
}

.dyson-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(201,168,76,0.06);
  border-top: 1px solid rgba(201,168,76,0.1);
}

.dyson-stat {
  background: var(--obs-850);
  padding: 20px 24px;
  text-align: center;
}

.dyson-stat-val {
  display: block;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--gold-pure);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.dyson-stat-lbl {
  display: block;
  font-family: var(--font-sans);
  font-size: 7.5px;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--obs-200);
  text-transform: uppercase;
}

/* ── Responsive for KD section ── */
@media (max-width: 1400px) {
  .kd-levels-grid { grid-template-columns: repeat(3, 1fr); }
  .kd-level-omega { grid-column: span 2; }
}

@media (max-width: 960px) {
  .kd-levels-grid { grid-template-columns: 1fr 1fr; }
  .kd-level-omega { grid-column: span 2; }
  .kd-ext-cards { grid-template-columns: 1fr; }
  .dyson-stats { grid-template-columns: repeat(2, 1fr); }
}



/* KD Nav special highlight */
.kd-nav-link .nav-num {
  color: rgba(245,237,204,0.6) !important;
  font-size: 10px;
}
.kd-nav-link:hover .nav-num,
.kd-nav-link.active .nav-num {
  color: var(--gold-pale) !important;
  text-shadow: 0 0 8px rgba(245,237,204,0.4);
}

/* ════════ Module 2 · Tính Ứng Dụng — danh sách nguồn ════════ */
.ud-nguon { margin: 24px 0 0; padding-left: 22px; font-family: var(--font-sans); font-size: 11.5px; font-weight: 300; line-height: 1.8; color: var(--slate-400); letter-spacing: 0.02em; max-width: var(--content-max); }
.ud-nguon li { margin-bottom: 6px; }
.ud-nguon em { color: var(--cream-300); }
.ud-nguon a { color: var(--gold-dim); text-decoration: none; border-bottom: 1px solid var(--gold-a25); }
.ud-nguon a:hover { color: var(--gold-light); }

/* ════════ SÁCH TRẮNG ALLiw · tên gọi và Lời Tuyên Bố ════════ */
/* «ALLiw»: ALL viết hoa, iw viết thường — đúng ý nghĩa tên gọi, kể cả trong tiêu đề in hoa */
.ten-alliw { text-transform: none !important; font-variant: normal; letter-spacing: 0.02em; }
.cover-title-vn .ten-alliw { font-size: clamp(56px, 9vw, 120px); letter-spacing: 0.01em; line-height: 1; }
.tb-ten { display: grid; grid-template-columns: 1.1fr 1.5fr 1.1fr; gap: 1px; margin: 44px 0; background: var(--gold-a12); border: 1px solid var(--gold-a15); }
.tb-ten-cot { background: var(--obs-850); padding: 32px 28px; position: relative; }
.tb-ten-cot::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, transparent, var(--gold-pure), transparent); }
.tb-chu { display: block; font-family: var(--font-display); font-size: 64px; font-weight: 700; line-height: 1; color: var(--gold-pure); text-transform: none; letter-spacing: 0.02em; text-shadow: 0 0 40px rgba(201,168,76,0.18); margin-bottom: 10px; }
.tb-i .tb-chu, .tb-w .tb-chu { color: var(--gold-light); }
.tb-nghia { display: block; font-family: var(--font-sans); font-size: 8.5px; font-weight: 700; letter-spacing: 0.35em; text-transform: uppercase; color: var(--gold-dim); margin-bottom: 16px; }
.tb-ten-cot p, .tb-ten-cot li { font-family: var(--font-body); font-size: 16px; font-weight: 300; color: var(--cream-200); line-height: 1.7; }
.tb-ten-cot ul { list-style: none; display: grid; gap: 10px; }
.tb-ten-cot li b { font-family: var(--font-display); font-weight: 600; color: var(--gold-light); letter-spacing: 0.04em; }
@media (max-width: 960px) { .tb-ten { grid-template-columns: 1fr; } }

/* Sách trắng · điện thoại: nhãn ấn bản không dính nút MENU */
@media (max-width: 600px) { .cover-classification { top: 76px; left: 36px; } #cover { padding-top: 124px; } }

/* ════════════════════════════════════════════════════════════════════════════════════════════════
   17/10/2026 · SÁCH TRẮNG ALLiw — GIAO DIỆN BIÊN TẬP SÁNG (giao_dien_sach_trang.py)
   Bảng màu đổi qua biến: nền ngà, chữ mực, điểm nhấn đất nung (màu nhấn của cổng ALLiw). Hai mảng minh hoạ giữ nền tối.
════════════════════════════════════════════════════════════════════════════════════════════════ */
:root {
  --obs-950: #efede5; --obs-900: #faf9f5; --obs-850: #f5f3ec; --obs-800: #faf9f5; --obs-750: #ffffff; --obs-700: #f0eee6;
  --obs-650: #ffffff; --obs-600: #e8e6dc; --obs-500: #dedbd0; --obs-400: #cfcabd; --obs-300: #9c988c; --obs-200: #87867f;
  --gold-950: #5e2a14; --gold-900: #6f3216; --gold-800: #8a3f1c; --gold-700: #a24a20; --gold-600: #a9501f; --gold-500: #c4622d;
  --gold-400: #b5542a; --gold-300: #c4622d; --gold-200: #a9501f; --gold-100: #8a3f1c; --gold-50: #f7e7dc;
  --gold-a12: rgba(196,98,45,0.12); --gold-a08: rgba(196,98,45,0.08); --gold-a06: rgba(196,98,45,0.06); --gold-a04: rgba(196,98,45,0.04);
  --gold-a02: rgba(196,98,45,0.02); --gold-a40: rgba(196,98,45,0.40); --gold-a25: rgba(196,98,45,0.25); --gold-a20: rgba(196,98,45,0.20);
  --gold-a15: rgba(196,98,45,0.15);
  --cream-100: #141413; --cream-200: #2b2a27; --cream-300: #4d4b45; --cream-400: #6b675e;
  --slate-500: #87867f; --slate-400: #6b6a64; --slate-300: #5e5d59; --slate-200: #3d3d3a;
  --font-display:    'Baskerville', 'Big Caslon', 'Palatino', 'Palatino Linotype', 'Georgia', 'Times New Roman', serif;
  --font-decorative: 'Baskerville', 'Big Caslon', 'Palatino', 'Palatino Linotype', 'Georgia', serif;
  --font-body:       'Georgia', 'Baskerville', 'Palatino', 'Times New Roman', serif;
  --font-prose:      'Georgia', 'Baskerville', serif;
  --ct-ke: #e8e6dc; --ct-nen: #faf9f5; --ct-mat: #ffffff; --ct-muc: #141413; --ct-phu: #5e5d59; --ct-nhan: #c4622d; --ct-nen2: #f0eee6;
}
body { background: var(--ct-nen); color: var(--ct-muc); font-weight: 400; }
#sidebar, #nav-toggle, .starfield, .cover-compass, .cover-vr, .cover-corner-tl, .cover-corner-br, .cover-watermark, .cover-atmosphere { display: none !important; }
#main { margin-left: 0 !important; }
#progress-rail { height: 2px; background: var(--ct-nhan); box-shadow: none; }
#progress-rail::after { display: none; }
::selection { background: rgba(196,98,45,0.18); }

/* thanh điều hướng trên cùng */
.ct-nav { position: sticky; top: 0; z-index: 90; display: flex; align-items: center; gap: 28px; padding: 14px max(24px, calc((100vw - 1180px) / 2));
          background: rgba(250,249,245,0.92); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid transparent; }
.ct-hieu { display: inline-flex; align-items: center; gap: 10px; color: var(--ct-muc); text-decoration: none; font-family: var(--font-display); font-size: 24px; font-weight: 700; letter-spacing: 0.01em; }
.ct-bieu-tuong.ct-nho { width: 26px; height: 26px; }
.ct-lk { display: flex; gap: 26px; margin-left: auto; font-family: var(--font-sans); font-size: 16px; }
.ct-lk a { color: var(--ct-muc); text-decoration: none; }
.ct-lk a:hover, .ct-lk a:focus-visible { color: var(--ct-nhan); outline: none; }
.ct-vao { display: inline-flex; align-items: center; gap: 6px; padding: 10px 18px; border-radius: 8px; background: var(--ct-muc); color: #ffffff; text-decoration: none; font-family: var(--font-sans); font-size: 15px; font-weight: 600; }
.ct-vao:hover, .ct-vao:focus-visible { background: #3d3d3a; outline: none; }

/* bìa căn giữa */
#cover { min-height: 0; padding: 120px 24px 96px; background: transparent; align-items: center; text-align: center; }
.cover-content { margin: 0 auto; max-width: 860px; }
.cover-classification { position: static; justify-content: center; margin: 0 0 30px; }
.classification-badge { border-color: var(--ct-ke); color: var(--ct-phu); background: var(--ct-mat); border-radius: 999px; padding: 5px 12px; letter-spacing: 0.25em; }
.classification-id { color: var(--slate-500); }
.cover-issue { justify-content: center; margin-bottom: 26px; }
.cover-issue-line { display: none; }
.cover-issue-text { color: var(--ct-phu); letter-spacing: 0.3em; }
.cover-eyebrow { color: var(--ct-nhan); letter-spacing: 0.2em; font-family: var(--font-sans); font-size: 12px; }
.cover-title-vn { display: inline-flex; align-items: center; gap: 22px; color: var(--ct-muc); text-shadow: none; text-transform: none; letter-spacing: -0.01em; margin-bottom: 18px; }
.cover-title-vn .ten-alliw { font-family: var(--font-display); font-weight: 400; font-size: clamp(60px, 10vw, 112px); line-height: 1; }
.cover-title-vn .ct-bieu-tuong { width: clamp(52px, 8vw, 92px); height: clamp(52px, 8vw, 92px); flex: none; }
.cover-title-rule { display: none; }
.cover-title-en { color: var(--ct-phu); font-style: normal; font-family: var(--font-body); font-size: clamp(16px, 1.8vw, 20px); margin-bottom: 26px; }
.cover-subtitle { border-left: 0; padding-left: 0; margin: 0 auto; max-width: 640px; font-style: normal; font-family: var(--font-body); color: var(--slate-200); font-size: clamp(18px, 2vw, 22px); line-height: 1.6; }
.cover-meta { margin: 52px auto 0; background: var(--ct-mat); border: 1px solid var(--ct-ke); border-radius: 14px; overflow: hidden; }
.cover-meta-item { border-right-color: var(--ct-ke); text-align: left; }
.cover-meta-label { color: var(--slate-500); }
.cover-meta-value { color: var(--ct-muc); font-family: var(--font-body); font-size: 15px; letter-spacing: 0; }

/* mục lục kiểu bản tin */
.ct-muc-luc { max-width: 880px; margin: 0 auto; padding: 24px 24px 72px; border-bottom: 1px solid var(--ct-ke); }
.ct-muc-luc h2 { font-family: var(--font-sans); font-weight: 600; font-size: clamp(30px, 3.4vw, 40px); letter-spacing: -0.01em; color: var(--ct-muc); margin: 0 0 30px; }
.ct-muc { padding: 0 0 26px; margin: 0 0 26px; border-bottom: 1px solid var(--ct-ke); }
.ct-muc:last-child { border-bottom: 0; margin-bottom: 0; }
.ct-muc h3 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; margin: 0 0 8px; font-family: var(--font-sans); font-size: 18px; font-weight: 600; line-height: 1.35; }
.ct-muc h3 a { color: var(--ct-muc); text-decoration: none; }
.ct-muc h3 a:hover, .ct-muc h3 a:focus-visible { color: var(--ct-nhan); outline: none; }
.ct-moi { display: inline-block; padding: 3px 9px; border-radius: 6px; background: #e3e1f2; color: #3d3a66; font-size: 13px; font-weight: 700; letter-spacing: 0.04em; }
.ct-nhan { font-weight: 400; color: var(--slate-500); font-size: 16px; }
.ct-muc p { margin: 0 0 10px; font-family: var(--font-body); font-size: 17px; line-height: 1.6; color: var(--cream-200); }
.ct-doc { font-family: var(--font-sans); font-size: 16px; color: var(--ct-phu); text-decoration: none; }
.ct-doc:hover, .ct-doc:focus-visible { color: var(--ct-nhan); outline: none; }

/* chương: một cột đọc ở giữa */
.content-section { max-width: 880px; margin: 0 auto; padding: 80px 24px; border-bottom: 1px solid var(--ct-ke); }
.content-section::before { display: none; }
.kardashev-section { background: transparent; }
.section-header { grid-template-columns: 1fr; gap: 0; margin-bottom: 36px; padding-bottom: 0; border-bottom: 0; }
.section-numeral-block { display: none; }
.chapter-tag { font-family: var(--font-sans); font-size: 12px; font-weight: 600; letter-spacing: 0.14em; color: var(--ct-nhan) !important; margin-bottom: 12px; }
.chapter-tag::after { display: none; }
.section-title { font-family: var(--font-display); font-weight: 400; text-transform: none; letter-spacing: -0.01em; font-size: clamp(34px, 4.6vw, 52px); line-height: 1.12; color: var(--ct-muc); margin-bottom: 18px; }
.section-lead { font-family: var(--font-body); font-style: normal; font-size: clamp(18px, 1.9vw, 21px); line-height: 1.55; color: var(--ct-phu); max-width: 760px; }
.prose p { font-size: 18.5px; line-height: 1.75; font-weight: 400; color: var(--cream-200); letter-spacing: 0; }
.prose strong { color: var(--ct-muc); font-weight: 700; }
.prose .drop-cap::first-letter { color: var(--ct-nhan); text-shadow: none; font-family: var(--font-display); font-weight: 400; }
.sub-heading { font-family: var(--font-display); font-weight: 400; font-size: clamp(24px, 2.6vw, 30px); text-transform: none; letter-spacing: -0.005em; color: var(--ct-muc); border-left: 0; padding-left: 0; margin: 64px 0 22px; }
.sub-heading .sub-num { font-family: var(--font-sans); font-size: 13px; font-weight: 600; color: var(--ct-nhan); letter-spacing: 0.08em; }
.gold-rule { background: var(--ct-ke); width: 64px; }
.section-rule, .diamond-divider::before, .diamond-divider::after { background: var(--ct-ke); }
.diamond-divider span { background: var(--ct-nhan); box-shadow: none; }

/* bảng, thẻ, khối */
.table-wrap { background: var(--ct-mat); border: 1px solid var(--ct-ke); border-radius: 14px; padding: 6px 0 0; }
.table-caption { color: var(--ct-phu); padding: 10px 22px 4px; letter-spacing: 0.2em; }
.table-caption::before { background: var(--ct-nhan); }
.data-table thead tr { border-top: 0; border-bottom: 1px solid var(--ct-ke); }
.data-table thead th { background: var(--ct-nen2); color: var(--ct-phu); font-size: 11px; letter-spacing: 0.12em; }
.data-table tbody tr { border-bottom-color: #efede5; }
.data-table tbody tr:hover { background: #fbfaf6; }
.data-table tbody td { font-family: var(--font-body); font-size: 15px; font-weight: 400; color: var(--cream-200); }
.data-table tbody td:first-child { color: var(--ct-muc); font-weight: 600; font-size: 15px; }
.badge-dim { background: var(--ct-nen2); color: var(--slate-400); border-color: var(--ct-ke); }
.cards-grid { gap: 16px; }
.card { background: var(--ct-mat); border: 1px solid var(--ct-ke); border-top: 1px solid var(--ct-ke); border-radius: 14px; }
.card:hover { transform: translateY(-3px); border-color: var(--ct-ke); box-shadow: 0 10px 30px rgba(20,20,19,0.08); }
.card-num { color: var(--ct-nhan); }
.card-title { font-family: var(--font-display); font-weight: 400; text-transform: none; letter-spacing: 0; font-size: 21px; line-height: 1.3; color: var(--ct-muc); }
.card-body { font-family: var(--font-body); font-size: 16px; color: var(--slate-200); }
.pullquote { background: var(--ct-nen2); border: 0; border-radius: 14px; }
.pullquote::before { background: var(--ct-nhan); }
.pullquote::after { color: rgba(196,98,45,0.25); opacity: 1; }
.pullquote p { color: var(--ct-muc) !important; font-family: var(--font-display); }
.pullquote .pq-mark, .pullquote-source { color: var(--ct-nhan); }
.stat-row { background: var(--ct-ke); border-color: var(--ct-ke); border-radius: 14px; overflow: hidden; }
.stat-cell { background: var(--ct-mat); }
.stat-cell:hover { background: #fdfcf9; }
.stat-value { color: var(--ct-nhan); font-family: var(--font-display); font-weight: 400; }
.stat-label { color: var(--ct-phu); }
.stat-desc { color: var(--slate-400); font-family: var(--font-body); }
.pillar-list li { border-bottom-color: var(--ct-ke); }
.pillar-icon { border-radius: 999px; background: var(--ct-mat); border-color: rgba(196,98,45,0.35); color: var(--ct-nhan); font-family: var(--font-display); }
.pillar-term { font-family: var(--font-display); font-weight: 400; text-transform: none; letter-spacing: 0; font-size: 20px; color: var(--ct-muc); }
.pillar-def { font-family: var(--font-body); font-size: 17px; color: var(--slate-200); }
.conclusion-box { background: var(--ct-nen2); border: 0; border-radius: 18px; }
.conclusion-box::before, .conclusion-box::after { display: none; }
.conclusion-title { color: var(--ct-nhan); }
.conclusion-title::before { background: var(--ct-nhan); }
.conclusion-body { color: var(--ct-muc); font-family: var(--font-body); font-size: 19px; }
.research-item { background: var(--ct-mat); border-color: var(--ct-ke); border-radius: 14px; }
.research-item:hover { background: var(--ct-mat); border-color: rgba(196,98,45,0.35); }
.research-q { font-family: var(--font-body); color: var(--cream-200); }
.comparison-grid { border-color: var(--ct-ke); border-radius: 14px; overflow: hidden; }
.comparison-col { background: var(--ct-mat); }
.comparison-grid::before { background: var(--ct-nen); }
.spectrum-visual { background: var(--ct-mat); border-color: var(--ct-ke); border-radius: 14px; }
.spectrum-fill { background: linear-gradient(90deg, #87867f 0%, #b5542a 40%, #c4622d 70%, #141413 100%); }
.node-omega { color: var(--ct-muc); }
.risk-cell, .risk-row-label { background: var(--ct-mat); }
.timeline::before { background: linear-gradient(180deg, var(--ct-nhan), var(--ct-ke)); }
.timeline-item::before { border-color: var(--ct-nen); box-shadow: 0 0 0 3px rgba(196,98,45,0.15); }
.tb-ten { background: var(--ct-ke); border-color: var(--ct-ke); border-radius: 14px; overflow: hidden; }
.tb-ten-cot { background: var(--ct-mat); }
.tb-ten-cot::before { background: var(--ct-nhan); opacity: 0.6; }
.tb-chu { color: var(--ct-nhan); text-shadow: none; font-weight: 400; }
.tb-i .tb-chu, .tb-w .tb-chu { color: var(--ct-muc); }
.tb-ten-cot li b { color: var(--ct-muc); }
.ud-nguon { color: var(--ct-phu); }
.ud-nguon em { color: var(--ct-muc); }
.ud-nguon a { color: var(--ct-nhan); border-bottom-color: rgba(196,98,45,0.3); }
#colophon { background: var(--ct-nen2); border-top: 1px solid var(--ct-ke); }
#colophon::before { display: none; }
.colophon-text { color: var(--ct-phu); font-family: var(--font-body); font-size: 14px; }
.colophon-logo { color: var(--ct-muc); }
.colophon-series { color: var(--slate-500); }
.colophon-mark { background: var(--ct-nhan); opacity: 0.5; }

/* hai mảng minh hoạ GIỮ nền tối: khai báo lại bảng màu tối ngay trên chúng */
.kd-universe-wrapper, .dyson-visual {
  --obs-950: #050709; --obs-900: #080a0e; --obs-850: #0a0d12; --obs-800: #0d1117; --obs-750: #10151c; --obs-700: #131920;
  --obs-650: #161e27; --obs-600: #1a2230; --obs-500: #1e2a3a; --obs-400: #243344; --obs-300: #2d3f52; --obs-200: #3a4f64;
  --gold-950: #5c4a1a; --gold-900: #6e5820; --gold-800: #876e2e; --gold-700: #9e8238; --gold-600: #a8893c; --gold-500: #c9a84c;
  --gold-400: #d4ae5c; --gold-300: #dfc070; --gold-200: #e2c97a; --gold-100: #eedd9a; --gold-50: #f5edcc;
  --gold-pure: #c9a84c; --gold-bright: #d4ae5c; --gold-light: #e2c97a; --gold-pale: #eedd9a; --gold-dim: #a8893c; --gold-deep: #876e2e;
  --gold-a12: rgba(201,168,76,0.12); --gold-a08: rgba(201,168,76,0.08); --gold-a06: rgba(201,168,76,0.06); --gold-a04: rgba(201,168,76,0.04);
  --gold-a40: rgba(201,168,76,0.40); --gold-a25: rgba(201,168,76,0.25); --gold-a20: rgba(201,168,76,0.20); --gold-a15: rgba(201,168,76,0.15);
  --cream-100: #f7f3ec; --cream-200: #ede5d3; --cream-300: #ddd0b8; --cream-400: #c8b99a;
  --slate-500: #5e7a92; --slate-400: #7a95ae; --slate-300: #96afc5; --slate-200: #b5cad9;
  background: #0a0d12; border-radius: 18px; color: #ede5d3;
}

/* điện thoại */
@media (max-width: 960px) {
  .ct-nav { gap: 14px; padding: 12px 16px; }
  .ct-lk { order: 3; width: 100%; margin-left: 0; gap: 18px; overflow-x: auto; font-size: 15px; padding-bottom: 2px; }
  .ct-vao { margin-left: auto; padding: 8px 14px; font-size: 14px; }
  .ct-nav { flex-wrap: wrap; }
  #cover { padding: 72px 16px 64px; }
  .content-section, .ct-muc-luc { padding-left: 16px; padding-right: 16px; }
  .cover-classification { top: auto; left: auto; }
}
@media (prefers-reduced-motion: reduce) { .content-section { opacity: 1; transform: none; transition: none; } }

/* 17/10 · ORIGINAL LOGO (va_logo_goc.py), no black ground: alliw-logo-goc-sang.svg, the logo's light-ground form */
.ct-logo { display: block; width: 100%; height: auto; }
.ct-hieu .ct-logo { width: 96px; }
.cover-title-vn .ct-logo-bia { width: clamp(260px, 40vw, 480px); }
.colophon-logo .ct-logo-cuoi { width: 180px; margin: 0 auto 10px; }

/* ════════ 18/10 · ba module: mục lục thành ba thẻ có số, đọc được ngay trên một màn hình ════════ */
.ct-muc-dan { font-family: var(--font-body); font-size: 18px; color: var(--ct-phu); margin: -14px 0 34px; }
.ct-module { display: grid; grid-template-columns: 76px 1fr; gap: 22px; align-items: start;
             padding: 26px 0; margin: 0; border-bottom: 1px solid var(--ct-ke); }
.ct-module:last-child { border-bottom: none; }
.ct-mod-so { font-family: var(--font-display); font-size: 54px; line-height: 0.9; font-weight: 400;
             color: var(--ct-nhan); opacity: 0.5; text-align: center; padding-top: 2px; }
.ct-mod-than h3 { margin: 0 0 6px; }
.ct-mod-hoi { font-family: var(--font-display); font-size: 21px; line-height: 1.35; color: var(--ct-muc);
              margin: 0 0 8px; }
.ct-module p { margin: 0 0 10px; }
.kd-nay { display: inline-block; margin-top: 3px; font-size: 12px; letter-spacing: 0.04em; opacity: 0.75; }
.kd-ghi-chu { max-width: 860px; margin: 14px auto 0; font-family: var(--font-body); font-size: 15px;
              line-height: 1.65; color: var(--ct-phu); }
@media (max-width: 700px) {
  .ct-module { grid-template-columns: 50px 1fr; gap: 14px; }
  .ct-mod-so { font-size: 38px; }
  .ct-mod-hoi { font-size: 19px; }
}

/* ════════ 18/10 · WCAG 2.2 mức AAA — đo bằng máy trên chính trang này, không ước lượng bằng mắt ════════
   Yêu cầu 1.4.6: chữ thường ≥ 7:1, chữ lớn (≥24px, hoặc ≥18,66px đậm) ≥ 4,5:1. Lần đo đầu: 47 nhóm chữ
   KHÔNG đạt, thấp nhất 2,09:1. Màu dưới đây được tính ngược từ ngưỡng, không phải chọn cho đẹp mắt.
   Màu nhấn CŨ (#c4622d, 3,88:1) vẫn dùng cho đường kẻ và nét trang trí — chỗ đó không có chữ nên không bị ràng buộc.
   Trang dùng ba nền sáng (#ffffff · #faf9f5 · #f0eee6) và nền tối #0a0d12 của khối thang đo. Màu chữ dưới đây
   tính ngược từ nền SÁNG KHÓ NHẤT (#f0eee6), nên đạt ngưỡng trên cả ba nền sáng. «!important» ở đây là cố ý:
   khối này là ngưỡng đo được, nó phải thắng mọi quy tắc trang trí viết trước nó. */
:root {
  --ct-phu: #504f4c;          /* 7,05:1 trên #f0eee6 — thay #5e5d59 (5,67:1) */
  --ct-nhan-chu: #7b3e1c;     /* 7,09:1 — màu nhấn DÙNG CHO CHỮ; #c4622d (3,88:1) chỉ còn cho nét vẽ */
  --ct-sang: #ddd0b8;         /* 12,78:1 trên nền tối #0a0d12 */
}
.cover-eyebrow, .chapter-tag, .sub-num, .pq-mark, .pullquote .pq-mark, .pullquote-source, .conclusion-title,
.card-num, .pillar-icon, .stat-value, .tb-chu, .tb-nghia, .box-corner-mark, .box-corner-mark.tl,
.box-corner-mark.tr, .ct-mod-so, #nav-toggle, .prose a, .ud-nguon a, .badge-gold,
.ct-muc h3 a:hover, .ct-muc h3 a:focus-visible, .ct-lk a:hover, .ct-lk a:focus-visible {
  color: var(--ct-nhan-chu) !important;
}
.classification-id, .cover-meta-label, .colophon-series, .colophon-text, .ct-nhan, .stat-desc, .stat-label,
.table-caption, .badge-dim, .badge-slate, .data-table th, .cover-issue-text, .cover-title-en, .section-lead,
.ct-doc, .kd-ghi-chu { color: var(--ct-phu) !important; }
.kd-header-scale, .kd-energy-label, .kd-asi-label, .dyson-stat-lbl, .kd-level-era, .kd-header-eyebrow,
.kd-ext-num, .kd-energy-tick span { color: var(--ct-sang) !important; }
.kd-nay { color: var(--ct-phu) !important; }   /* dòng «nay ~…» nằm trong bảng nền sáng, không phải khối tối */
/* cỡ chữ nhỏ nhất: 7–9px là rào cản thật dù màu đã đạt ngưỡng — nâng sàn lên 11px, giữ nguyên khoảng chữ */
.classification-badge, .classification-id, .cover-issue-text, .cover-meta-label, .stat-label, .table-caption,
.card-num, .pq-mark, .pullquote-source, .colophon-series, .badge, .kd-header-eyebrow, .kd-header-scale,
.kd-energy-label, .kd-asi-label, .dyson-stat-lbl, .kd-level-era, .box-corner-mark,
.kd-energy-tick span, .kd-ext-num, .tb-nghia, .kd-level-pip, .kd-level-badge, .kd-omega-mark,
.kd-level-energy, .kd-level-era, #nav-toggle, .cover-issue-text .ten-alliw { font-size: 11px !important; }
.conclusion-title { font-size: 13px; }
.colophon-text { font-size: 13px; }
/* 2.4.7 Thấy rõ tiêu điểm + 2.4.1 Bỏ qua khối lặp */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--ct-nhan-chu); outline-offset: 3px; border-radius: 2px;
}
.ct-bo-qua { position: absolute; left: -9999px; top: 0; z-index: 200; padding: 12px 18px; background: var(--ct-muc);
             color: #ffffff; font-family: var(--font-sans); font-size: 15px; text-decoration: none; }
.ct-bo-qua:focus { left: 12px; top: 12px; }

/* ════════ /sach-trang trên cổng: lớp thay cho style nội tuyến (CSP style-src 'self') ════════ */
.nt-sup { font-size: 0.55em; }
.nt-mb44 { margin-bottom: 44px; }
.risk-header.nt-trong { background: transparent; border-color: transparent; }
.kd-energy-tick.nt-l0 { left: 0%; } .kd-energy-tick.nt-l25 { left: 25%; } .kd-energy-tick.nt-l50 { left: 50%; }
.kd-energy-tick.nt-l75 { left: 75%; } .kd-energy-tick.nt-l100 { left: 100%; }
.kd-level-card { cursor: pointer; }
.nt-vao { display: inline-block; margin-top: 14px; padding: 9px 16px; border: 1px solid var(--gold-a40); color: var(--gold-light);
          font-family: var(--font-sans); font-size: 10px; font-weight: 700; letter-spacing: 0.25em; text-transform: uppercase; text-decoration: none; }
.nt-vao:hover, .nt-vao:focus-visible { background: var(--gold-a12); color: var(--gold-pale); outline: none; }
/* 17/10 · nút đổi ngôn ngữ trên thanh điều hướng */
.ct-ngon { display: inline-flex; align-items: center; padding: 9px 14px; border: 1px solid var(--ct-ke); border-radius: 8px; color: var(--ct-muc);
           background: var(--ct-mat); text-decoration: none; font-family: var(--font-sans); font-size: 15px; font-weight: 500; }
.ct-ngon:hover, .ct-ngon:focus-visible { border-color: var(--ct-muc); outline: none; }
.ct-ngon + .ct-vao { margin-left: -14px; }
@media (max-width: 960px) {
  .ct-ngon { margin-left: auto; padding: 7px 12px; font-size: 14px; }
  .ct-ngon + .ct-vao { margin-left: 0; }
  .ct-lk a { white-space: nowrap; }          /* đo ở 375px: «Tuyên Bố», «Các Chương» gãy hai dòng — giữ một dòng, thanh tự cuộn ngang */
}
/* 17/10 · đo ở 375px: ma trận rủi ro (chương IV) đẩy trang rộng 455px — cột được co, chữ được xuống dòng */
@media (max-width: 600px) {
  .risk-matrix { grid-template-columns: minmax(0, 0.9fr) repeat(3, minmax(0, 1fr)); }
  .risk-header, .risk-row-label, .risk-cell { min-width: 0; padding: 10px 7px; letter-spacing: 0.04em; overflow-wrap: anywhere; hyphens: auto; }
  .risk-row-label { white-space: normal; }
}