/* ============================================================================
   DAI.NINJA — UNIFIED ARCHITECTURAL & EDITORIAL DESIGN SYSTEM (SINGLE SOURCE)
   Shared across:
   - https://dai.ninja/ (Flagship Top)
   - https://dai.ninja/articles/ & /articles/*.html (Editorial Web Blog)
   - https://portal.dai.ninja/ (Client Project Portal)
   - https://hq.dai.ninja/ (Owner HQ Console)
   ============================================================================ */

:root {
  /* Color Palette */
  --bg-white: #FFFFFF;
  --bg-stone: #F6F5F2;
  --bg-dark: #0E131F;

  --ink-primary: #11151C;
  --ink-body: #333945;
  --ink-muted: #646D7A;
  --ink-faint: #949DA8;

  --accent-navy: #1E3A8A;
  --accent-navy-soft: rgba(30, 58, 138, 0.06);
  --accent-brass: #9A7B3E;
  --accent-brass-bright: #B45309;

  --line-subtle: #E4E2DD;
  --line-mid: #CBC8C0;
  --line-dark: #11151C;

  /* Status Colors (Restrained Architectural Tones) */
  --status-ok-bg: #F0FDF4;
  --status-ok-border: #166534;
  --status-ok-ink: #14532D;
  --status-err-bg: #FEF2F2;
  --status-err-border: #991B1B;
  --status-err-ink: #7F1D1D;

  /* Font Families */
  --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Shippori Mincho', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'Inter', monospace;

  /* Strict Modular Font Size Scale (Golden Editorial Ratio) */
  --fs-hero: clamp(24px, 2.5vw, 32.5px);      /* H1 Hero Display */
  --fs-h2: clamp(22px, 2.3vw, 28px);          /* H2 Section Title */
  --fs-h2-compact: clamp(19px, 1.9vw, 22.5px);/* H2 Split Column Title */
  --fs-h3-lg: 20.5px;                         /* H3 Domain Band Title */
  --fs-h3-md: 17.5px;                         /* H3 Principle / Flagship Sub */
  --fs-h3-sm: 16.5px;                         /* H3 Chronology / Blog Card Title */
  --fs-lead: 14.75px;                         /* Section Lead Copy */
  --fs-body: 13.75px;                         /* Standard Prose Copy */
  --fs-caption: 12.5px;                       /* Deliverables / Meta / Sub-copy */
  --fs-micro: 10.5px;                         /* Engraved English Index Labels */

  /* Strict Font Weight Scale (Restrained & Architectural) */
  --fw-light: 300;
  --fw-regular: 400;                          /* Body prose & Large display numerals */
  --fw-medium: 500;                           /* Subtle emphasis, UI links, EN labels */
  --fw-semibold: 600;                         /* Mincho headings (sharp, never blotchy) */
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  background-color: var(--bg-white);
  color: var(--ink-body);
  line-height: 1.92;
  letter-spacing: 0.025em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  word-break: normal;
  overflow-wrap: break-word;
  line-break: strict;
  position: relative;
}

/* Proportional kerning for Japanese headings & UI elements (eliminates loose bracket gaps) */
h1, h2, h3, h4, .nav-link, .btn-solid, .btn-outline, .btn-header, .domain-thesis, .domain-deliverables li, .editorial-link, .hq-tab-btn, .arch-badge {
  font-feature-settings: "palt" 1;
}

/* Refined In-Paragraph Emphasis: Crisp semibold without noisy multi-line underline */
p strong, li strong {
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
}

/* Architectural Vertical Guide Lines */
body::before,
body::after {
  content: "";
  position: fixed;
  top: 0;
  bottom: 0;
  width: 1px;
  background-color: rgba(17, 21, 28, 0.04);
  pointer-events: none;
  z-index: 10;
}
body::before {
  left: max(20px, calc(50% - 570px));
}
body::after {
  right: max(20px, calc(50% - 570px));
}

.nw {
  white-space: nowrap;
}

.ib {
  display: inline-block;
}

.mono {
  font-family: var(--font-en);
  letter-spacing: 0.04em;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   HEADER — Minimal Editorial Bar (Shared across all dai.ninja properties)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-subtle);
}

.header-inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink-primary);
  flex-shrink: 0;
}

.brand-monogram {
  width: 28px;
  height: 28px;
  border: 1px solid var(--ink-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  background-color: var(--bg-white);
  position: relative;
}

.brand-monogram::after {
  content: "";
  position: absolute;
  bottom: -3px;
  right: -3px;
  width: 100%;
  height: 100%;
  border-right: 1px solid var(--accent-brass);
  border-bottom: 1px solid var(--accent-brass);
  pointer-events: none;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.05em;
  color: var(--ink-primary);
}

.brand-sub {
  font-family: var(--font-en);
  font-size: var(--fs-micro);
  font-weight: var(--fw-regular);
  color: var(--ink-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding-left: 10px;
  border-left: 1px solid var(--line-mid);
}

@media (max-width: 640px) {
  .brand-sub {
    display: none;
  }
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 12.75px;
  font-weight: var(--fw-regular);
  color: var(--ink-body);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
  transition: color 0.15s ease;
}

.nav-link span.num {
  font-family: var(--font-en);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  color: var(--accent-brass);
  margin-right: 5px;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--accent-navy);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.link-portal {
  font-size: 12px;
  font-weight: var(--fw-regular);
  color: var(--ink-muted);
  text-decoration: none;
  white-space: nowrap;
  padding: 6px 10px;
  transition: color 0.15s ease;
}

.link-portal:hover {
  color: var(--ink-primary);
}

.btn-header {
  padding: 8px 16px;
  font-size: 12px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.03em;
  color: #FFFFFF;
  background-color: var(--ink-primary);
  border-radius: 2px;
  border: 1px solid var(--ink-primary);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-header:hover {
  background-color: var(--accent-navy);
  border-color: var(--accent-navy);
}

@media (max-width: 960px) {
  .main-nav {
    display: none;
  }
}

/* ==========================================================================
   SHARED FOOTER — Architectural Dark Footer
   ========================================================================== */
.site-footer {
  padding: 48px 0;
  background-color: var(--bg-dark);
  color: #9CA3AF;
  border-top: 2px solid var(--ink-primary);
}

.site-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 12px;
}

.site-footer-links a {
  color: #D1D5DB;
  text-decoration: none;
  transition: color 0.15s ease;
}

.site-footer-links a:hover {
  color: #FFFFFF;
}

/* ==========================================================================
   CRAFTED SECTION DIVIDERS & HEADERS
   ========================================================================== */
.section {
  padding: 96px 0;
  border-bottom: 1px solid var(--line-subtle);
  position: relative;
}

.section-stone {
  background-color: var(--bg-stone);
  background-image: radial-gradient(rgba(17, 21, 28, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
}

.sec-index-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  margin-bottom: 36px;
  border-top: 1px solid var(--line-mid);
  position: relative;
}

.sec-index-bar::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 44px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-navy) 70%, var(--accent-brass) 70%);
}

.sec-index-left {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-primary);
}

.sec-index-left span.ch-num {
  color: var(--accent-navy);
  font-weight: var(--fw-semibold);
}

.sec-index-right {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: var(--fw-regular);
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.sec-heading {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.46;
  letter-spacing: 0.03em;
  margin-bottom: 16px;
}

.sec-lead {
  font-size: var(--fs-lead);
  font-weight: var(--fw-regular);
  color: var(--ink-muted);
  line-height: 1.95;
  letter-spacing: 0.02em;
  max-width: 760px;
}

/* ==========================================================================
   HERO — Architectural Grid Canvas + Calibrated Display Typography
   ========================================================================== */
.hero {
  padding: 80px 0 92px;
  border-bottom: 1px solid var(--line-subtle);
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #FFFFFF 0%, #FAF9F6 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(30, 58, 138, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 138, 0.055) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: radial-gradient(ellipse 60% 75% at 76% 42%, #000 15%, transparent 75%);
  mask-image: radial-gradient(ellipse 60% 75% at 76% 42%, #000 15%, transparent 75%);
  pointer-events: none;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

@media (min-width: 960px) {
  .hero-layout {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.98fr);
    gap: 60px;
  }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-navy);
  margin-bottom: 22px;
}

.hero-eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-navy) 70%, var(--accent-brass) 70%);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: var(--fs-hero);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.54;
  letter-spacing: 0.01em;
  margin-bottom: 26px;
}

.hero-title-highlight {
  color: var(--accent-navy);
  background: linear-gradient(transparent 74%, rgba(154, 123, 62, 0.18) 74%);
  padding-bottom: 2px;
}

.hero-desc {
  font-size: var(--fs-lead);
  font-weight: var(--fw-regular);
  color: var(--ink-body);
  line-height: 1.98;
  letter-spacing: 0.02em;
  margin-bottom: 34px;
  padding-left: 18px;
  border-left: 2px solid var(--line-mid);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.btn-solid {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  background-color: var(--ink-primary);
  color: #FFFFFF;
  font-family: inherit;
  font-size: 13px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
  border-radius: 2px;
  text-decoration: none;
  border: 1px solid var(--ink-primary);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.btn-solid:hover:not(:disabled) {
  background-color: var(--accent-navy);
  border-color: var(--accent-navy);
}

.btn-solid:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 20px;
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--ink-primary);
  font-family: inherit;
  font-size: 13px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
  border-radius: 2px;
  border: 1px solid var(--line-mid);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.btn-outline:hover:not(:disabled) {
  border-color: var(--ink-primary);
  background-color: #FFFFFF;
}

.btn-sm {
  padding: 7px 14px;
  font-size: 11.75px;
  gap: 6px;
}

/* Right Architectural Spec Box */
.arch-panel {
  background-color: #FFFFFF;
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 30px 32px;
  position: relative;
  box-shadow: 0 20px 40px -24px rgba(17, 21, 28, 0.08);
}

.arch-panel::after {
  content: "+";
  position: absolute;
  top: 10px;
  right: 14px;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: var(--fw-regular);
  color: var(--line-mid);
  line-height: 1;
}

.arch-panel-header {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-subtle);
  margin-bottom: 22px;
}

.arch-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.arch-timeline::before {
  content: "";
  position: absolute;
  top: 16px;
  bottom: 16px;
  left: 15px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent-navy) 0%, var(--accent-brass) 100%);
}

.arch-node {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  position: relative;
}

.arch-node-badge {
  width: 32px;
  height: 32px;
  background-color: #FFFFFF;
  border: 1px solid var(--accent-navy);
  color: var(--accent-navy);
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: var(--fw-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}

.arch-node.is-center .arch-node-badge {
  background-color: var(--accent-navy);
  color: #FFFFFF;
}

.arch-node-content {
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--line-subtle);
}

.arch-node:last-child .arch-node-content {
  padding-bottom: 0;
  border-bottom: none;
}

.arch-node-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  margin-bottom: 4px;
  letter-spacing: 0.02em;
}

.arch-node-sub {
  font-size: var(--fs-caption);
  font-weight: var(--fw-regular);
  color: var(--ink-muted);
  line-height: 1.65;
}

/* ==========================================================================
   CHAPTER 01 — Asymmetric Split + Framed KPI Grid + Editorial Chronology
   ========================================================================== */
.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

@media (min-width: 920px) {
  .split-layout {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.32fr);
    gap: 60px;
  }
}

.stat-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 32px;
  border-top: 1px solid var(--ink-primary);
  border-left: 1px solid var(--line-subtle);
  background-color: var(--bg-stone);
}

.stat-cell {
  padding: 20px 18px;
  border-right: 1px solid var(--line-subtle);
  border-bottom: 1px solid var(--line-subtle);
  position: relative;
}

.stat-cell::before {
  content: "";
  display: block;
  width: 16px;
  height: 2px;
  background-color: var(--accent-brass);
  margin-bottom: 10px;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: var(--fw-medium);
  color: var(--ink-primary);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.stat-unit {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: var(--fw-medium);
  margin-left: 3px;
  color: var(--accent-navy);
}

.stat-caption {
  font-size: 11.75px;
  font-weight: var(--fw-regular);
  color: var(--ink-muted);
  margin-top: 8px;
  line-height: 1.55;
}

.chronology-list {
  border-top: 3px double var(--ink-primary);
}

.chronology-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--line-subtle);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

@media (min-width: 640px) {
  .chronology-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 24px;
  }
}

.chrono-period {
  font-family: var(--font-en);
  font-size: 11.5px;
  font-weight: var(--fw-medium);
  color: var(--ink-primary);
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chrono-period::before {
  content: "";
  width: 5px;
  height: 5px;
  background-color: var(--accent-navy);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.chrono-role {
  display: block;
  font-size: 11px;
  font-weight: var(--fw-medium);
  color: var(--accent-brass);
  margin-top: 6px;
  padding-left: 13px;
  letter-spacing: 0.02em;
}

.chrono-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3-sm);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.48;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}

.chrono-desc {
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  color: var(--ink-body);
  line-height: 1.9;
}

/* ==========================================================================
   CHAPTER 02 — Architectural 3-Column Principles
   ========================================================================== */
.hairline-grid-3 {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  background-color: #FFFFFF;
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  margin-top: 40px;
  box-shadow: 0 16px 36px -24px rgba(17, 21, 28, 0.06);
}

@media (min-width: 900px) {
  .hairline-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.hairline-col {
  padding: 36px 30px;
  border-bottom: 1px solid var(--line-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
  position: relative;
}

@media (min-width: 900px) {
  .hairline-col {
    border-bottom: none;
    border-right: 1px solid var(--line-subtle);
  }
  .hairline-col:last-child {
    border-right: none;
  }
}

.principle-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-subtle);
}

.principle-index {
  font-family: var(--font-en);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  letter-spacing: 0.14em;
  color: var(--accent-brass);
}

.principle-big-num {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: var(--fw-regular);
  color: rgba(30, 58, 138, 0.2);
  line-height: 1;
}

.principle-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3-md);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.52;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}

.principle-body {
  font-size: 13.5px;
  font-weight: var(--fw-regular);
  color: var(--ink-body);
  line-height: 1.9;
  margin-bottom: 24px;
}

.editorial-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  font-weight: var(--fw-medium);
  color: var(--ink-primary);
  text-decoration: none;
  padding: 11px 14px;
  background-color: var(--bg-stone);
  border-left: 2px solid var(--accent-navy);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.editorial-link:hover {
  background-color: var(--accent-navy-soft);
  color: var(--accent-navy);
}

/* ==========================================================================
   CHAPTER 03 — Dark Architectural Flagship + Spec Matrix
   ========================================================================== */
.flagship-panel {
  background-color: var(--bg-dark);
  background-image:
    radial-gradient(circle at 88% 18%, rgba(30, 58, 138, 0.42), transparent 55%),
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
  color: #FFFFFF;
  padding: 44px 48px;
  margin-top: 40px;
  border-left: 4px solid var(--accent-brass);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: center;
  position: relative;
}

.flagship-panel p strong {
  color: #FFFFFF;
  border-bottom-color: rgba(212, 180, 117, 0.5);
}

@media (min-width: 900px) {
  .flagship-panel {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr);
    gap: 48px;
  }
}

.spec-table {
  margin-top: 28px;
  border-top: 2px solid var(--ink-primary);
}

.spec-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-subtle);
  align-items: baseline;
}

@media (min-width: 820px) {
  .spec-row {
    grid-template-columns: 190px 295px minmax(0, 1fr);
    gap: 28px;
  }
}

/* ==========================================================================
   CHAPTER 04 — Executive Service Bands
   ========================================================================== */
.domain-stack {
  margin-top: 40px;
  border-top: 3px double var(--ink-primary);
}

.domain-band {
  padding: 42px 0;
  border-bottom: 1px solid var(--line-mid);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

@media (min-width: 900px) {
  .domain-band {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.25fr);
    gap: 52px;
  }
}

.domain-left-head {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  align-items: stretch;
  gap: 20px;
}

.domain-num-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  border-right: 1px solid var(--line-mid);
  padding-right: 18px;
  padding-top: 2px;
}

.domain-big-num {
  font-family: var(--font-serif);
  font-size: 38px;
  font-weight: var(--fw-regular);
  color: var(--accent-navy);
  line-height: 1;
  white-space: nowrap;
}

.domain-num-rail {
  flex: 1;
  width: 1px;
  min-height: 36px;
  margin-top: 12px;
  background: linear-gradient(180deg, var(--accent-brass) 0%, rgba(30, 58, 138, 0.15) 100%);
  position: relative;
}

.domain-num-rail::before {
  content: "";
  position: absolute;
  top: 0;
  left: -2.5px;
  width: 6px;
  height: 6px;
  background-color: var(--accent-brass);
  transform: rotate(45deg);
}

.domain-code {
  font-family: var(--font-en);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  letter-spacing: 0.14em;
  color: var(--accent-brass);
  text-transform: uppercase;
  margin-bottom: 6px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.domain-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3-lg);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.44;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}

.domain-thesis {
  font-size: 12.75px;
  font-weight: var(--fw-medium);
  color: var(--accent-navy);
  background-color: rgba(255, 255, 255, 0.85);
  border-left: 2px solid var(--accent-navy);
  padding: 9px 14px;
  line-height: 1.6;
}

.domain-deliverables-wrap {
  margin-top: 18px;
  background-color: #FFFFFF;
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 18px 20px;
}

.domain-deliverables-label {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.14em;
  color: var(--accent-navy);
  margin-bottom: 12px;
  display: block;
}

.domain-deliverables {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px 12px;
  list-style: none;
}

@media (min-width: 640px) {
  .domain-deliverables {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.domain-deliverables li {
  font-size: 11.5px;
  color: var(--ink-primary);
  font-weight: var(--fw-medium);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background-color: var(--bg-stone);
  border: 1px solid var(--line-subtle);
  line-height: 1.4;
  white-space: nowrap;
}

.deliverable-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #FFFFFF;
  border: 1px solid rgba(30, 58, 138, 0.22);
}

/* Engagement Bar */
.engagement-bar {
  margin-top: 40px;
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 32px 36px;
}

.engagement-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line-subtle);
}

@media (min-width: 860px) {
  .engagement-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }
}

/* ==========================================================================
   CHAPTER 05 — Web Blog Editorial Index
   ========================================================================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 32px 0 28px;
}

.filter-btn {
  padding: 7px 15px;
  font-size: 12px;
  font-weight: var(--fw-medium);
  font-family: inherit;
  background-color: transparent;
  color: var(--ink-muted);
  border: 1px solid var(--line-mid);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-btn:hover {
  border-color: var(--ink-primary);
  color: var(--ink-primary);
}

.filter-btn.active {
  background-color: var(--ink-primary);
  color: #FFFFFF;
  border-color: var(--ink-primary);
}

.blog-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

@media (min-width: 900px) {
  .blog-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.blog-item {
  border: 1px solid var(--line-subtle);
  border-top: 2px solid var(--ink-primary);
  padding: 26px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
  background-color: var(--bg-white);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.blog-item:hover {
  border-color: var(--accent-navy);
  box-shadow: 0 14px 28px -18px rgba(17, 21, 28, 0.12);
}

.blog-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 11px;
  color: var(--ink-muted);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-subtle);
}

.blog-cat {
  font-weight: var(--fw-medium);
  color: var(--accent-navy);
}

.blog-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3-sm);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.52;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.blog-excerpt {
  font-size: 12.75px;
  font-weight: var(--fw-regular);
  color: var(--ink-muted);
  line-height: 1.85;
  margin-bottom: 20px;
}

/* ==========================================================================
   SEAMLESS ARCHITECTURAL INFOGRAPHICS & LUXURY TECH ORNAMENTS
   ========================================================================== */
.svg-responsive {
  display: block;
  width: 100%;
  height: auto;
}

.tech-hatch {
  display: inline-block;
  width: 36px;
  height: 8px;
  background-image: repeating-linear-gradient(
    -45deg,
    var(--accent-navy),
    var(--accent-navy) 1.5px,
    transparent 1.5px,
    transparent 5px
  );
  opacity: 0.45;
  vertical-align: middle;
}

.sys-crest-dark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-dark);
  border: 1px solid #1E3A8A;
  border-top: 2px solid #D4B475;
  box-shadow: 0 6px 14px -6px rgba(17, 21, 28, 0.22);
  position: relative;
}

.svg-emblem {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #F4F6FB;
  border: 1px solid rgba(30, 58, 138, 0.24);
  border-top: 2px solid var(--accent-navy);
  position: relative;
}

.era-spec-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 10px;
  padding: 3px 8px;
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-left: 2px solid var(--accent-brass);
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  color: var(--ink-body);
  white-space: nowrap;
}

.reticle-frame {
  position: relative;
}

.telemetry-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  background-color: #F4F6FB;
  border: 1px solid rgba(30, 58, 138, 0.22);
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  color: var(--accent-navy);
}

.telemetry-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-brass-bright);
  box-shadow: 0 0 0 3px rgba(180, 83, 9, 0.18);
}

.tech-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.tech-tag {
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  color: var(--accent-navy);
  background-color: #F4F6FB;
  border: 1px solid rgba(30, 58, 138, 0.2);
  padding: 2px 8px;
}

.arch-contrast-strip {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  background: linear-gradient(90deg, var(--bg-stone) 0%, #F4F6FB 100%);
  border: 1px solid var(--line-subtle);
  border-left: 3px solid var(--accent-brass);
  margin-bottom: 22px;
  font-size: 11px;
}

.unified-kpi-panel {
  margin-top: 28px;
  background-color: #FFFFFF;
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  box-shadow: 0 20px 42px -24px rgba(17, 21, 28, 0.09);
  position: relative;
}

.kpi-chart-canvas {
  padding: 24px 24px 18px;
  border-bottom: 1px solid var(--line-subtle);
  background-image: radial-gradient(rgba(30, 58, 138, 0.04) 1px, transparent 1px);
  background-size: 16px 16px;
}

.kpi-sub-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  background-color: var(--bg-stone);
}

.kpi-sub-cell {
  padding: 16px 14px;
  border-right: 1px solid var(--line-subtle);
  position: relative;
  overflow: hidden;
}

.kpi-sub-cell:last-child {
  border-right: none;
}

.kpi-watermark-svg {
  position: absolute;
  right: -6px;
  bottom: -6px;
  width: 54px;
  height: 54px;
  opacity: 0.07;
  pointer-events: none;
}

.principle-open-illust {
  margin: 4px 0 20px;
  padding: 8px 0 18px;
  border-bottom: 1px solid var(--line-subtle);
}

.flagship-blueprint-canvas {
  grid-column: 1 / -1;
  margin-top: 8px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.blog-issue-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line-subtle);
}

.blog-issue-num {
  font-family: var(--font-en);
  font-size: 10.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.14em;
  color: var(--accent-brass);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   CHAPTER 06 — Contact Form & Shared Form Controls
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

@media (min-width: 860px) {
  .contact-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.15fr);
    gap: 64px;
  }
}

.form-box {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 36px;
  box-shadow: 0 20px 40px -24px rgba(17, 21, 28, 0.08);
}

.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  font-weight: var(--fw-medium);
  color: var(--ink-primary);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.form-label-en {
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.12em;
  color: var(--accent-brass);
  text-transform: uppercase;
}

.form-input {
  width: 100%;
  padding: 11px 14px;
  border-radius: 2px;
  border: 1px solid var(--line-mid);
  background-color: var(--bg-stone);
  font-family: inherit;
  font-size: 13.75px;
  font-weight: var(--fw-regular);
  color: var(--ink-primary);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--ink-primary);
  background-color: var(--bg-white);
}

textarea.form-input {
  line-height: 1.75;
  resize: vertical;
}

/* ==========================================================================
   EDITORIAL BLOG (/articles/ & /articles/*.html) — Unified Architecture
   ========================================================================== */
.article-page-bg {
  background-color: var(--bg-stone);
  background-image: radial-gradient(rgba(17, 21, 28, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  min-height: calc(100vh - 140px);
  padding: 40px 0 88px;
}

.arch-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-muted);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-subtle);
}

.arch-breadcrumb a {
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

.arch-breadcrumb a:hover {
  color: var(--accent-navy);
}

.arch-breadcrumb .sep {
  font-family: var(--font-en);
  color: var(--line-mid);
  font-size: 11px;
}

.arch-breadcrumb .current {
  color: var(--ink-primary);
  font-weight: var(--fw-medium);
}

/* Articles Index Hero & List (/articles/index.html) */
.articles-index-hero {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 3px double var(--ink-primary);
  padding: 40px 44px;
  margin-bottom: 36px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 18px 36px -24px rgba(17, 21, 28, 0.07);
}

@media (max-width: 640px) {
  .articles-index-hero {
    padding: 28px 22px;
  }
}

.articles-list-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-index-card {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 26px 30px;
  text-decoration: none;
  color: inherit;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

@media (min-width: 820px) {
  .article-index-card {
    grid-template-columns: 284px minmax(0, 1fr);
    gap: 30px;
  }
}

.article-index-card:hover {
  border-color: var(--accent-navy);
  box-shadow: 0 18px 36px -22px rgba(17, 21, 28, 0.12);
}

.article-index-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  background-color: #FAF9F5;
  border: 1px solid var(--line-mid);
  overflow: hidden;
  display: block;
}

.article-index-thumb::after {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid rgba(180, 83, 9, 0.22);
  pointer-events: none;
  z-index: 2;
}

.article-index-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.article-index-card:hover .article-index-thumb-img {
  transform: scale(1.035);
}

.article-index-thumb-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(14, 19, 31, 0.9);
  border: 1px solid rgba(212, 180, 117, 0.7);
  padding: 3px 9px;
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  color: #FFFFFF;
}

.article-index-thumb-badge-dot {
  width: 5px;
  height: 5px;
  background-color: #D4B475;
  display: inline-block;
}

.article-index-thumb-caption {
  display: none;
}

/* Blog Grid Card Thumbnail (Top Page & Related Articles) */
.blog-item-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  margin-bottom: 16px;
  background-color: #FAF9F5;
  border: 1px solid var(--line-mid);
  overflow: hidden;
}

.blog-item-thumb::after {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid rgba(180, 83, 9, 0.22);
  pointer-events: none;
  z-index: 2;
}

.blog-item-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.blog-item:hover .blog-item-thumb-img {
  transform: scale(1.035);
}

.blog-item-thumb-badge {
  position: absolute;
  top: 9px;
  left: 9px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background-color: rgba(14, 19, 31, 0.88);
  border: 1px solid rgba(212, 180, 117, 0.65);
  padding: 2px 8px;
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  color: #FFFFFF;
}

/* Individual Article Document Frame (/articles/*.html) */
.article-shell {
  max-width: 900px;
  margin: 0 auto;
}

.article-doc-card {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 3px double var(--ink-primary);
  box-shadow: 0 24px 48px -28px rgba(17, 21, 28, 0.09);
  overflow: hidden;
}

/* Top Kicker Bar Above H1 */
.article-top-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.article-kicker-left {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.article-kicker-cat {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 10px;
  background-color: #F4F6FB;
  border: 1px solid rgba(30, 58, 138, 0.22);
  color: var(--accent-navy);
  font-size: 11.5px;
  font-weight: var(--fw-semibold);
}

.article-kicker-cat.daily {
  background-color: #FFFBEB;
  border-color: rgba(180, 83, 9, 0.35);
  color: #B45309;
}

.article-kicker-code {
  font-family: var(--font-en);
  font-size: 10.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.14em;
  color: var(--accent-brass);
}

/* 16:9 Wide Editorial Eyecatch Visual Frame (Placed Directly Below Meta Bar) */
.article-eyecatch-figure {
  position: relative;
  width: 100%;
  margin: 0 0 32px 0;
  background-color: #FAF9F5;
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  overflow: hidden;
  box-shadow: 0 14px 28px -20px rgba(17, 21, 28, 0.12);
}

.article-eyecatch-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background-color: #FAF9F5;
  display: block;
  cursor: zoom-in;
}

.article-eyecatch-stamp {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 11px;
  background-color: rgba(14, 19, 31, 0.9);
  border: 1px solid rgba(212, 180, 117, 0.7);
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.14em;
  color: #FFFFFF;
}

.article-eyecatch-stamp-dot {
  width: 6px;
  height: 6px;
  background-color: #D4B475;
  display: inline-block;
}

.article-eyecatch-caption-bar {
  position: relative;
  padding: 10px 16px;
  background-color: var(--bg-stone);
  border-top: 1px solid var(--line-mid);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.article-eyecatch-caption-bar > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  width: 100%;
  gap: 10px;
}

.article-eyecatch-theme {
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.article-eyecatch-sub {
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.12em;
  color: var(--accent-brass);
  text-transform: uppercase;
}

.article-body-pad {
  padding: 44px 56px 56px;
}

/* Flat Editorial Intelligence Components (Reader-First Digest Structure) */
.article-thesis-lead {
  border-left: 3px solid var(--accent-navy);
  padding: 2px 0 2px 14px;
  margin-bottom: 20px;
  color: var(--ink-primary);
  font-size: 14.75px;
  line-height: 1.88;
}

.article-thesis-badge {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  color: #FFFFFF;
  background-color: var(--accent-navy);
  padding: 2px 8px;
  margin-right: 8px;
  vertical-align: middle;
}

.topic-unit {
  padding: 28px 0 12px;
  border-top: 1px solid var(--line-mid);
}

.topic-unit:first-of-type {
  border-top: none;
  padding-top: 8px;
}

.topic-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 11.5px;
}

.topic-num-pill {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.1em;
  color: #FFFFFF;
  background-color: var(--ink-primary);
  padding: 2px 8px;
}

.topic-date-pill {
  font-weight: var(--fw-semibold);
  color: var(--accent-brass-bright);
}

.topic-source-pill {
  color: var(--ink-muted);
}

.topic-domain-pill {
  color: var(--accent-navy);
  background-color: #F4F6FB;
  border: 1px solid rgba(30, 58, 138, 0.18);
  padding: 1px 8px;
  font-size: 11px;
  font-weight: var(--fw-medium);
}

.article-prose .topic-unit h3 {
  margin-top: 4px;
  margin-bottom: 12px;
}

.topic-one-liner {
  background-color: #F4F6FB;
  border-left: 3px solid var(--accent-navy);
  padding: 11px 14px;
  margin: 0 0 18px;
  font-size: 13.75px;
  line-height: 1.78;
  color: var(--ink-primary);
}

.topic-fact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0 0 10px;
  padding: 0;
}

.topic-fact-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-body);
}

.topic-fact-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--accent-navy);
}

.topic-layer {
  margin: 18px 0 22px;
}

.topic-layer-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  margin-bottom: 8px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--line-subtle);
}

.topic-layer-dot {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  background-color: var(--accent-navy);
}

.topic-layer-dot.brass {
  background-color: var(--accent-brass-bright);
}

.topic-source-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: var(--fw-medium);
  color: var(--accent-navy);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 58, 138, 0.35);
  padding-bottom: 1px;
  margin-top: 2px;
}

.topic-source-link:hover {
  color: var(--accent-brass-bright);
  border-bottom-color: var(--accent-brass-bright);
}

/* Flat Cross-Topic Trend Forecast Block (Zero Nested Padding) */
.forecast-macro-banner {
  border-top: 2px solid var(--ink-primary);
  border-bottom: 1px solid var(--line-mid);
  background-color: var(--bg-stone);
  padding: 16px 18px;
  margin: 18px 0 24px;
}

.forecast-block {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-subtle);
}

.forecast-block:last-of-type {
  border-bottom: none;
}

.forecast-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.forecast-num {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  color: #FFFFFF;
  background-color: var(--accent-navy);
  padding: 2px 8px;
}

.forecast-horizon {
  font-size: 11.5px;
  font-weight: var(--fw-medium);
  color: var(--accent-brass);
}

.forecast-title {
  font-family: var(--font-serif);
  font-size: 16.5px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.48;
  margin-bottom: 12px;
}

.forecast-shift {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
  font-size: 12.5px;
  line-height: 1.65;
}

.forecast-shift-cell {
  padding: 10px 12px;
  background-color: var(--bg-stone);
  border-left: 2px solid var(--line-mid);
}

.forecast-shift-cell.after {
  background-color: #F4F6FB;
  border-left: 2px solid var(--accent-navy);
}

@media (max-width: 680px) {
  .forecast-macro-banner {
    padding: 14px 12px;
  }
  .forecast-shift {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }
  .forecast-shift-cell {
    padding: 8px 10px;
  }
  /* Stack 3-column overview table cleanly on mobile without cramping */
  .arch-table.mobile-stack-table thead {
    display: none;
  }
  .arch-table.mobile-stack-table,
  .arch-table.mobile-stack-table tbody,
  .arch-table.mobile-stack-table tr,
  .arch-table.mobile-stack-table td {
    display: block;
    width: 100%;
  }
  .arch-table.mobile-stack-table tr {
    padding: 12px 14px;
    border-bottom: 1px solid var(--line-mid);
  }
  .arch-table.mobile-stack-table tr:last-child {
    border-bottom: none;
  }
  .arch-table.mobile-stack-table td {
    padding: 3px 0;
    border: none;
  }
  .arch-table.mobile-stack-table td:first-child {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 2px;
  }
  .arch-table.mobile-stack-table td:first-child br {
    display: none;
  }
  .arch-table.mobile-stack-table td:last-child {
    font-size: 12px;
    color: var(--ink-muted);
    margin-top: 4px;
    padding-top: 4px;
    border-top: 1px dashed var(--line-subtle);
  }
}

.article-h1 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.4vw, 28.5px);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.5;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
}

/* Creator / Metadata Bar */
.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line-subtle);
  border-bottom: 1px solid var(--line-subtle);
  margin-bottom: 32px;
}

.article-creator-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-creator-name {
  font-size: 13px;
  font-weight: var(--fw-medium);
  color: var(--ink-primary);
}

.article-creator-date {
  font-size: 11.5px;
  color: var(--ink-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
}

.arch-like-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 2px;
  border: 1px solid var(--line-mid);
  background-color: var(--bg-white);
  color: var(--ink-primary);
  font-family: inherit;
  font-size: 12px;
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all 0.15s ease;
}

.arch-like-btn:hover {
  border-color: var(--accent-navy);
  color: var(--accent-navy);
}

.arch-like-btn.liked {
  background-color: #FEF2F2;
  border-color: #B91C1C;
  color: #B91C1C;
}

/* 3-Line Executive Takeaways Box */
.article-summary-arch {
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 24px 28px;
  margin: 28px 0;
  position: relative;
}

.article-summary-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-subtle);
}

.article-summary-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-serif);
  font-size: 14.5px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
}

.article-summary-arch ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-summary-arch li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  font-weight: var(--fw-medium);
  color: var(--ink-primary);
  line-height: 1.75;
}

.article-summary-arch li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 6px;
  height: 6px;
  background-color: var(--accent-navy);
  transform: rotate(45deg);
}

/* Table of Contents (TOC) */
.article-toc-arch {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-left: 3px solid var(--accent-navy);
  padding: 20px 24px;
  margin: 28px 0 40px;
}

.article-toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-subtle);
}

.article-toc-toggle {
  background: none;
  border: 1px solid var(--line-subtle);
  padding: 3px 9px;
  font-family: var(--font-en);
  font-size: 10.5px;
  font-weight: var(--fw-medium);
  color: var(--ink-muted);
  cursor: pointer;
}

.article-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-toc-list a {
  text-decoration: none;
  color: var(--ink-body);
  font-size: 13px;
  line-height: 1.55;
  transition: color 0.15s ease;
  display: block;
}

.article-toc-list a:hover {
  color: var(--accent-navy);
}

.toc-item-h2 a {
  font-weight: var(--fw-medium);
  color: var(--ink-primary);
}

.toc-item-h3 {
  padding-left: 18px;
  position: relative;
}

.toc-item-h3::before {
  content: "—";
  position: absolute;
  left: 2px;
  top: 0;
  color: var(--accent-brass);
  font-size: 11px;
}

/* Article Prose Typography & Elements */
.article-prose {
  font-size: 14.5px;
  color: var(--ink-body);
  line-height: 2.02;
}

.article-prose p {
  margin-bottom: 24px;
}

.article-prose h2 {
  font-family: var(--font-serif);
  font-size: clamp(19px, 2vw, 22.5px);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.48;
  letter-spacing: 0.02em;
  margin: 56px 0 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line-mid);
  position: relative;
  scroll-margin-top: 88px;
}

.article-prose h2::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 44px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-navy) 70%, var(--accent-brass) 70%);
}

.article-prose h3 {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.52;
  margin: 34px 0 14px;
  padding-left: 14px;
  border-left: 3px solid var(--accent-navy);
  scroll-margin-top: 88px;
}

/* Semantic Lists, Inline Links, Code & Blockquotes in Article Prose */
.article-prose ul:not([class]) {
  list-style: none;
  margin: 0 0 22px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-prose > ul:not([class]) {
  margin: 4px 0 26px 0;
  padding: 18px 22px;
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-left: 3px solid var(--accent-navy);
  gap: 11px;
}

.article-prose ul:not([class]) > li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.86;
  color: var(--ink-body);
}

.article-prose ul:not([class]) > li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--accent-navy);
  transform: rotate(45deg);
}

.article-prose ol:not([class]) {
  list-style: none;
  counter-reset: arch-ol;
  margin: 0 0 22px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-prose > ol:not([class]) {
  margin: 4px 0 28px 0;
  padding: 20px 22px;
  background-color: #FAF9F5;
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  gap: 14px;
}

.article-prose ol:not([class]) > li {
  counter-increment: arch-ol;
  position: relative;
  padding-left: 32px;
  font-size: 14px;
  line-height: 1.86;
  color: var(--ink-body);
}

.article-prose ol:not([class]) > li::before {
  content: counter(arch-ol);
  position: absolute;
  left: 0;
  top: 3px;
  width: 21px;
  height: 21px;
  background-color: var(--accent-navy);
  color: #FFFFFF;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: var(--fw-semibold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
}

.article-prose a:not([class]):not([style]) {
  color: var(--accent-navy);
  font-weight: var(--fw-medium);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 58, 138, 0.42);
  padding-bottom: 1px;
  transition: color 0.15s ease, border-bottom-color 0.15s ease;
}

.article-prose a:not([class]):not([style]):hover {
  color: var(--accent-brass-bright);
  border-bottom-color: var(--accent-brass-bright);
}

.article-prose a:not([class]):not([style]) strong {
  color: inherit;
}

.article-prose code:not([class]) {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--accent-navy);
  background-color: #F4F6FB;
  border: 1px solid rgba(30, 58, 138, 0.18);
  padding: 1px 6px;
  border-radius: 2px;
  margin: 0 2px;
}

.article-prose blockquote:not([class]) {
  margin: 22px 0 26px;
  padding: 16px 20px;
  background-color: var(--bg-stone);
  border-left: 3px solid var(--accent-brass);
  color: var(--ink-primary);
  font-size: 14px;
  line-height: 1.88;
}

.note-highlight,
.arch-highlight {
  background: linear-gradient(transparent 68%, rgba(180, 83, 9, 0.16) 68%);
  color: var(--ink-primary);
  font-weight: var(--fw-medium);
  padding: 0 2px;
}

.note-callout,
.arch-callout {
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-left: 3px solid var(--accent-brass);
  padding: 22px 24px;
  margin: 26px 0;
}

.note-callout-title,
.arch-callout-title {
  font-family: var(--font-serif);
  font-size: 14.5px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Comparison Table in Articles */
.note-table-wrap,
.arch-table-wrap {
  overflow-x: auto;
  margin: 26px 0 32px;
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  background-color: var(--bg-white);
}

.note-table,
.arch-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  line-height: 1.68;
}

.note-table th,
.arch-table th {
  background-color: var(--bg-stone);
  color: var(--ink-primary);
  font-weight: var(--fw-semibold);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-mid);
  border-right: 1px solid var(--line-subtle);
  white-space: nowrap;
}

.note-table td,
.arch-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-subtle);
  border-right: 1px solid var(--line-subtle);
  color: var(--ink-body);
  vertical-align: top;
}

.note-table tr:last-child td,
.arch-table tr:last-child td {
  border-bottom: none;
}

/* FAQ Block in Articles */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 20px 0 32px;
}

.faq-item {
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  background-color: var(--bg-white);
  padding: 20px 24px;
}

.faq-q {
  font-family: var(--font-serif);
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  font-size: 14.5px;
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.faq-q::before {
  content: "Q";
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: var(--fw-semibold);
  color: #FFFFFF;
  background-color: var(--accent-navy);
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.faq-a {
  font-size: 13.5px;
  color: var(--ink-body);
  padding-left: 32px;
  line-height: 1.85;
}

/* Article Hashtags & Author Box */
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 32px 0 24px;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  color: var(--ink-body);
  font-size: 11.5px;
  font-weight: var(--fw-medium);
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.tag-pill:hover {
  border-color: var(--accent-navy);
  color: var(--accent-navy);
}

.author-card {
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 26px 28px;
  margin-top: 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
}

/* ==========================================================================
   CLIENT PORTAL (portal.dai.ninja) & OWNER HQ (hq.dai.ninja) APPLICATION UI
   ========================================================================== */
.app-page-bg {
  background-color: var(--bg-stone);
  background-image: radial-gradient(rgba(17, 21, 28, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  min-height: calc(100vh - 68px);
  padding: 44px 0 88px;
}

/* Top Dark Command Bar for Owner Quick-Switch on Portal */
.owner-command-bar {
  display: none;
  background-color: var(--bg-dark);
  border-bottom: 2px solid var(--accent-brass);
  padding: 10px 24px;
  color: #FFFFFF;
  position: sticky;
  top: 0;
  z-index: 200;
}

.owner-command-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.owner-pill-btn {
  padding: 5px 12px;
  border-radius: 2px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background-color: rgba(255, 255, 255, 0.06);
  color: #E5E7EB;
  font-family: inherit;
  font-size: 11.5px;
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all 0.15s ease;
}

.owner-pill-btn:hover,
.owner-pill-btn.active {
  background-color: var(--accent-navy);
  border-color: #D4B475;
  color: #FFFFFF;
}

/* Portal Gate Box */
.portal-gate-wrap {
  max-width: 500px;
  margin: 28px auto 0;
}

.portal-gate-card {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 3px double var(--ink-primary);
  padding: 38px 36px;
  box-shadow: 0 22px 44px -26px rgba(17, 21, 28, 0.1);
  position: relative;
}

.pin-code-input {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.35em;
  text-align: center;
}

/* Portal Room Layout */
.portal-room-header {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 3px double var(--ink-primary);
  padding: 28px 34px;
  margin-bottom: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  box-shadow: 0 16px 32px -24px rgba(17, 21, 28, 0.08);
}

.portal-room-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

@media (min-width: 900px) {
  .portal-room-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.95fr);
  }
}

.deliverable-arch-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.deliverable-arch-card {
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-left: 3px solid var(--accent-navy);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.deliverable-arch-card:hover {
  background-color: var(--bg-white);
  border-color: var(--accent-navy);
  box-shadow: 0 12px 24px -16px rgba(17, 21, 28, 0.12);
}

.agenda-arch-pre {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--ink-body);
  line-height: 1.9;
  white-space: pre-wrap;
  background-color: var(--bg-stone);
  border: 1px solid var(--line-subtle);
  border-left: 3px solid var(--accent-brass);
  padding: 18px 20px;
}

/* HQ Console Specific Components */
.hq-tabs-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-mid);
}

.hq-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 20px;
  border-radius: 2px;
  border: 1px solid var(--line-mid);
  background-color: var(--bg-white);
  color: var(--ink-muted);
  font-family: inherit;
  font-size: 13px;
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all 0.15s ease;
}

.hq-tab-btn:hover {
  color: var(--ink-primary);
  border-color: var(--ink-primary);
}

.hq-tab-btn.active {
  background-color: var(--ink-primary);
  color: #FFFFFF;
  border-color: var(--ink-primary);
}

.hq-workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

@media (min-width: 960px) {
  .hq-workspace-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.95fr);
  }
}

.hq-client-card {
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 20px 22px;
  margin-bottom: 14px;
}

.hq-msg-card {
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-left: 3px solid var(--accent-navy);
  padding: 18px 20px;
  margin-bottom: 12px;
}

/* Status Alert Banner */
.arch-alert {
  display: none;
  padding: 12px 16px;
  border-radius: 2px;
  font-size: 12.75px;
  font-weight: var(--fw-medium);
  margin-bottom: 18px;
  line-height: 1.6;
}

.arch-alert.ok {
  display: block;
  background-color: var(--status-ok-bg);
  border: 1px solid var(--status-ok-border);
  border-left: 3px solid var(--status-ok-border);
  color: var(--status-ok-ink);
}

.arch-alert.err {
  display: block;
  background-color: var(--status-err-bg);
  border: 1px solid var(--status-err-border);
  border-left: 3px solid var(--status-err-border);
  color: var(--status-err-ink);
}

/* ==========================================================================
   HITOKOTONUSHI 3-AXIS PERSONA UX ENHANCEMENTS (Shared Components)
   ========================================================================== */

/* 1-Click Template Insertion Chips (Reduces Psychological Friction) */
.persona-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.persona-chip-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  font-family: var(--font-sans);
  font-size: 11.5px;
  font-weight: var(--fw-medium);
  color: var(--accent-navy);
  background-color: #F4F6FB;
  border: 1px solid rgba(30, 58, 138, 0.24);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
  line-height: 1.4;
}

.persona-chip-btn:hover {
  background-color: var(--accent-navy);
  color: #FFFFFF;
  border-color: var(--accent-navy);
}

/* Post-Inquiry 3-Step Flow Strip (Executive Decision-Maker Clarity) */
.consultation-flow-strip {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 20px 22px;
  margin-bottom: 22px;
}

.consultation-flow-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.flow-step-card {
  background-color: var(--bg-stone);
  border: 1px solid var(--line-subtle);
  border-left: 2px solid var(--accent-brass);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.flow-step-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.flow-step-num {
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.1em;
  color: var(--accent-brass);
  white-space: nowrap;
}

.flow-step-title {
  font-family: var(--font-serif);
  font-size: 13.5px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.4;
}

.flow-step-desc {
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1.6;
}

/* Demo Room 1-Click Showcase Banner on Portal Gate */
.demo-try-banner {
  margin-top: 22px;
  padding: 16px 18px;
  background: linear-gradient(135deg, #F4F6FB 0%, #FFFFFF 100%);
  border: 1px solid rgba(30, 58, 138, 0.28);
  border-left: 3px solid var(--accent-navy);
}

/* Article Target Reader Badge & Key Takeaway Preview on Index */
.article-target-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: var(--fw-medium);
  color: var(--ink-body);
  background-color: var(--bg-stone);
  border: 1px solid var(--line-mid);
  border-left: 2px solid var(--accent-brass);
  padding: 2px 9px;
}

.article-takeaway-preview {
  background-color: var(--bg-stone);
  border: 1px solid var(--line-subtle);
  border-left: 2px solid var(--accent-navy);
  padding: 10px 14px;
  margin-bottom: 14px;
  font-size: 12px;
  color: var(--ink-primary);
  line-height: 1.65;
}

/* Contextual Consultation Bridge Box inside Article Page */
.article-bridge-cta {
  margin: 28px 0;
  padding: 26px 28px;
  background: linear-gradient(135deg, #F4F6FB 0%, #FFFFFF 100%);
  border: 1px solid rgba(30, 58, 138, 0.25);
  border-top: 2px solid var(--accent-navy);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
}

/* HQ 4-Metric Overview Strip */
.hq-kpi-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

@media (min-width: 820px) {
  .hq-kpi-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.hq-kpi-cell {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  padding: 16px 18px;
}

.hq-kpi-label {
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  color: var(--accent-brass);
  margin-bottom: 4px;
}

.hq-kpi-val {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.3;
}

.hq-kpi-sub {
  font-size: 11.5px;
  color: var(--ink-muted);
  margin-top: 3px;
}

/* Responsive In-Article Infographics & Diagrams (PC & Mobile Optimized) */
.arch-infographic {
  margin: 24px 0 28px;
  border: 1px solid var(--line-mid);
  border-top: 2px solid var(--ink-primary);
  background-color: #FAF9F5;
  padding: 20px 22px;
}

.infographic-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line-mid);
}

.infographic-title-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.infographic-fig-badge {
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.14em;
  color: #FFFFFF;
  background-color: var(--ink-primary);
  border-left: 3px solid #D4B475;
  padding: 2px 8px;
}

.infographic-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.4;
}

.infographic-sub {
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.12em;
  color: var(--accent-brass);
}

/* Pattern 1: 3-Step or 2-Step Horizontal Flow (Stacks Vertically on Mobile) */
.infographic-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px minmax(0, 1fr) 24px minmax(0, 1fr);
  align-items: stretch;
  gap: 8px;
}

.infographic-flow.cols-2 {
  grid-template-columns: minmax(0, 1fr) 32px minmax(0, 1fr);
  gap: 12px;
}

.infographic-node {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  padding: 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}

.infographic-node.highlight {
  background-color: #F4F6FB;
  border-color: var(--accent-navy);
  border-top: 2px solid var(--accent-navy);
}

.infographic-node.brass-highlight {
  background-color: #FFFDF7;
  border-color: rgba(180, 83, 9, 0.45);
  border-top: 2px solid var(--accent-brass-bright);
}

.infographic-node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.infographic-step-num {
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  color: var(--accent-brass-bright);
}

.infographic-node.highlight .infographic-step-num {
  color: var(--accent-navy);
}

.infographic-node-title {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.42;
}

.infographic-node-desc {
  font-size: 12.5px;
  color: var(--ink-body);
  line-height: 1.65;
  margin: 0;
}

.infographic-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-brass-bright);
}

/* Pattern 2: 2-Column Before/After or Dual Comparison */
.infographic-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.infographic-col {
  background-color: var(--bg-white);
  border: 1px solid var(--line-mid);
  padding: 15px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.infographic-col.ng {
  background-color: #F5F4F0;
  border-top: 2px solid #94A3B8;
}

.infographic-col.ok {
  background-color: #F4F6FB;
  border-color: rgba(30, 58, 138, 0.35);
  border-top: 2px solid var(--accent-navy);
}

.infographic-col-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: var(--fw-semibold);
  color: var(--ink-muted);
}

.infographic-col.ok .infographic-col-badge {
  color: var(--accent-navy);
}

.infographic-col-title {
  font-family: var(--font-serif);
  font-size: 14.5px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
  line-height: 1.42;
}

.infographic-mini-steps {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.infographic-mini-step {
  background-color: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--line-subtle);
  border-left: 2px solid #94A3B8;
  padding: 7px 10px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-body);
}

.infographic-col.ok .infographic-mini-step {
  background-color: #FFFFFF;
  border-left: 2px solid var(--accent-brass-bright);
  color: var(--ink-primary);
}

/* Pattern 3: Visual Metric Bars */
.infographic-bars {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.infographic-bar-row {
  background-color: var(--bg-white);
  border: 1px solid var(--line-subtle);
  padding: 12px 14px;
}

.infographic-bar-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.infographic-bar-label {
  font-size: 13px;
  font-weight: var(--fw-semibold);
  color: var(--ink-primary);
}

.infographic-bar-val {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: var(--fw-semibold);
  color: var(--accent-navy);
}

.infographic-bar-val.brass {
  color: var(--accent-brass-bright);
}

.infographic-bar-track {
  width: 100%;
  height: 10px;
  background-color: #E5E3DC;
  overflow: hidden;
}

.infographic-bar-fill {
  height: 100%;
  background-color: #94A3B8;
}

.infographic-bar-fill.navy {
  background: linear-gradient(90deg, #1E3A8A 0%, #2563EB 100%);
}

.infographic-bar-fill.brass {
  background: linear-gradient(90deg, #1E3A8A 0%, #B45309 100%);
}

.infographic-bar-note {
  font-size: 12px;
  color: var(--ink-muted);
  margin-top: 6px;
  line-height: 1.55;
}

.infographic-foot {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-mid);
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1.6;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

/* Mobile & Viewport Overflow Guard (Takemikazuchi & Hitokotonushi Audit) */
.hero,
.section {
  overflow-x: clip;
}

@media (max-width: 680px) {
  .link-portal {
    display: none;
  }
  .btn-header {
    padding: 7px 11px;
    font-size: 11.5px;
  }
  .demo-try-banner .btn-outline {
    white-space: normal;
    line-height: 1.4;
    text-align: center;
  }
  /* Eliminate Double Margins & Cramped Padding on Mobile Articles */
  .article-page-bg {
    padding: 14px 0 48px;
  }
  .article-page-bg > .container {
    padding: 0 8px;
  }
  .arch-breadcrumb {
    padding: 0 4px 10px;
    margin-bottom: 12px;
    font-size: 11px;
  }
  .articles-index-hero {
    padding: 20px 14px;
    margin-bottom: 20px;
  }
  .article-index-card {
    padding: 16px 14px;
    gap: 14px;
  }
  .article-eyecatch-figure {
    margin: 0 0 22px;
  }
  .article-eyecatch-stamp {
    top: 10px;
    left: 10px;
    padding: 4px 9px;
    font-size: 9px;
  }
  .article-eyecatch-caption-bar {
    padding: 8px 12px;
  }
  .article-eyecatch-theme {
    font-size: 12px;
  }
  .article-eyecatch-sub {
    font-size: 8.5px;
  }
  .article-eyecatch-arch {
    padding: 20px 16px;
    gap: 14px;
  }
  .article-eyecatch-svg-box {
    padding: 8px 10px;
  }
  .article-body-pad {
    padding: 22px 15px 30px;
  }
  .article-h1 {
    font-size: 19.5px;
    line-height: 1.46;
    margin-bottom: 16px;
  }
  .article-meta-bar {
    padding: 12px 0;
    margin-bottom: 20px;
    gap: 10px;
  }
  .article-summary-arch {
    padding: 14px 13px;
    margin: 18px 0;
  }
  .article-summary-arch li {
    font-size: 13px;
    padding-left: 14px;
  }
  .article-toc-arch {
    padding: 13px 13px;
    margin: 18px 0 26px;
  }
  .note-callout,
  .arch-callout {
    padding: 14px 13px;
    margin: 16px 0;
  }
  .arch-infographic {
    padding: 14px 12px;
    margin: 18px 0 22px;
  }
  .infographic-head {
    padding-bottom: 10px;
    margin-bottom: 12px;
  }
  .infographic-title {
    font-size: 14px;
  }
  .infographic-flow,
  .infographic-flow.cols-2 {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
  .infographic-arrow svg {
    transform: rotate(90deg);
  }
  .infographic-compare {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }
  .infographic-col,
  .infographic-node {
    padding: 12px 12px;
  }
  .infographic-node-desc,
  .infographic-mini-step {
    font-size: 13px;
  }
  .topic-one-liner {
    padding: 10px 12px;
    font-size: 13.5px;
  }
  .faq-item {
    padding: 14px 13px;
  }
  .faq-a {
    padding-left: 0;
    margin-top: 6px;
  }
  .author-card,
  .article-bridge-cta {
    grid-template-columns: minmax(0, 1fr);
    padding: 16px 14px;
    gap: 16px;
  }
  .article-prose {
    font-size: 14.25px;
    line-height: 1.88;
  }
  .article-prose p {
    margin-bottom: 18px;
  }
  .article-prose h2 {
    font-size: 18px;
    margin: 36px 0 14px;
    padding-top: 14px;
  }
  .article-prose h3 {
    font-size: 16px;
    margin: 22px 0 10px;
    padding-left: 10px;
  }
  .article-prose > ul:not([class]),
  .article-prose > ol:not([class]) {
    padding: 14px 14px;
    margin: 4px 0 20px 0;
  }
  .article-prose ul:not([class]) > li,
  .article-prose ol:not([class]) > li {
    font-size: 13.75px;
  }
}

/* ==========================================================================
   ARTICLE IMAGE ZOOM LIGHTBOX MODAL & CLICK-TO-ENLARGE UI
   ========================================================================== */
.article-prose figure img {
  cursor: zoom-in;
  transition: opacity 0.18s ease;
}

.article-prose figure img:hover {
  opacity: 0.94;
}

.arch-zoom-hint {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background-color: rgba(14, 19, 31, 0.88);
  border: 1px solid rgba(212, 180, 117, 0.75);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 500;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

.arch-lightbox-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background-color: rgba(11, 15, 25, 0.92);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  cursor: zoom-out;
}

.arch-lightbox-backdrop.is-open {
  display: flex;
}

.arch-lightbox-inner {
  position: relative;
  max-width: min(94vw, 1380px);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: default;
}

.arch-lightbox-close {
  position: absolute;
  top: -42px;
  right: 0;
  background-color: rgba(17, 21, 28, 0.9);
  border: 1px solid #D4B475;
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.arch-lightbox-close:hover {
  background-color: #D4B475;
  color: #0E131F;
}

.arch-lightbox-img {
  max-width: min(94vw, 1380px);
  max-height: 80vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border: 1px solid rgba(212, 180, 117, 0.55);
  background-color: #0E131F;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.7);
  display: block;
}

.arch-lightbox-caption {
  margin-top: 12px;
  padding: 8px 16px;
  background-color: rgba(14, 19, 31, 0.9);
  border-left: 3px solid #D4B475;
  color: #E5E7EB;
  font-size: 12.5px;
  line-height: 1.65;
  max-width: 960px;
  text-align: left;
}