/* =====================================================
   AEGIS NOVA — Site Stylesheet
   Aligned with Brand Guidelines v1.0
   ===================================================== */

/* ---------- Fonts (Google Fonts) ---------- */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,400&family=Noto+Serif+JP:wght@300;400;500;700&family=Space+Mono:wght@400;700&display=swap');

/* ---------- Brand Tokens ---------- */
:root {
  /* Colors */
  --ink:        #0A0F1C;
  --navy:       #1A2B47;
  --gold:       #A88433;
  --gold-light: #C9A14A;
  --bronze:     #8B6B26;
  --parchment:  #F5F1E8;
  --parchment-light: #FBF8F0;
  --mist:       #E4DFD2;
  --stone:      #7A7568;
  --seal-red:   #8B1A1A;
  --white:      #FFFFFF;

  /* Typography */
  --font-serif-en: 'Cormorant Garamond', 'Times New Roman', serif;
  --font-serif-jp: 'Noto Serif JP', 'Yu Mincho', serif;
  --font-mono:     'Space Mono', 'Courier New', monospace;

  /* Layout */
  --container: 1200px;
  --container-narrow: 880px;
  --container-text: 720px;
  --gutter: 1.5rem;

  /* Heading scale (modular) */
  --h-display: clamp(3rem, 6vw, 5.5rem);
  --h1:        clamp(2.25rem, 4vw, 3.5rem);
  --h2:        clamp(1.75rem, 3vw, 2.5rem);
  --h3:        clamp(1.25rem, 2vw, 1.625rem);
  --h4:        1.125rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-xxl: 9rem;

  /* Misc */
  --header-h: 76px;
  --radius: 2px;
  --transition: 220ms cubic-bezier(.4, 0, .2, 1);
  --transition-long: 480ms cubic-bezier(.4, 0, .2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-serif-jp);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  background: var(--parchment);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "palt";
}
img, svg { max-width: 100%; height: auto; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul, ol { list-style: none; }
input, textarea, select { font: inherit; color: inherit; }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.container--narrow { max-width: var(--container-narrow); }
.container--text   { max-width: var(--container-text); }

/* =====================================================
   HEADER & NAVIGATION
   ===================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 241, 232, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--mist);
  height: var(--header-h);
  display: flex;
  align-items: center;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}
.site-logo__symbol { width: 32px; height: 32px; }
.site-logo__text {
  font-family: var(--font-serif-en);
  font-size: 1.4rem;
  letter-spacing: 0.15em;
  color: var(--ink);
  line-height: 1;
}
.site-logo__text small {
  display: block;
  font-size: 0.55rem;
  letter-spacing: 0.25em;
  color: var(--gold);
  margin-top: 4px;
  font-family: var(--font-mono);
}

/* Primary nav */
.primary-nav { display: flex; align-items: center; gap: 0.25rem; }
.primary-nav__item {
  position: relative;
}
.primary-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: 0.05em;
  transition: color var(--transition);
}
.primary-nav__link::after {
  content: '';
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: -2px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition);
}
.primary-nav__link:hover { color: var(--gold); }
.primary-nav__link:hover::after,
.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* Dropdown */
.has-dropdown { position: relative; }
.has-dropdown__toggle::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  margin-left: 0.5em;
  transition: transform var(--transition);
}
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 280px;
  background: var(--white);
  border: 1px solid var(--mist);
  box-shadow: 0 10px 30px rgba(10, 15, 28, 0.08);
  padding: 0.75rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown__link {
  display: block;
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  color: var(--ink);
  transition: background var(--transition), color var(--transition);
}
.dropdown__link:hover {
  background: var(--parchment-light);
  color: var(--gold);
}

/* CTA button in header */
.btn-header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  background: var(--ink);
  color: var(--parchment);
  letter-spacing: 0.05em;
  transition: background var(--transition), color var(--transition);
}
.btn-header-cta:hover { background: var(--navy); color: var(--gold-light); }
.btn-header-cta::after {
  content: '→';
  font-family: var(--font-serif-en);
  transition: transform var(--transition);
}
.btn-header-cta:hover::after { transform: translateX(3px); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--ink);
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--ink);
  color: var(--parchment);
  border-color: var(--ink);
}
.btn--primary:hover {
  background: var(--navy);
  color: var(--gold-light);
  border-color: var(--navy);
}
.btn--secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn--secondary:hover {
  background: var(--ink);
  color: var(--parchment);
}
.btn--ghost {
  background: transparent;
  color: var(--ink);
  padding-left: 0;
  padding-right: 0;
  border-bottom: 1px solid var(--gold);
  border-radius: 0;
}
.btn--ghost:hover { color: var(--gold); }
.btn--on-dark {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}
.btn--on-dark:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
}
.btn--on-dark-secondary {
  background: transparent;
  color: var(--parchment);
  border-color: var(--parchment);
}
.btn--on-dark-secondary:hover {
  background: var(--parchment);
  color: var(--ink);
}
.btn::after {
  content: '→';
  font-family: var(--font-serif-en);
  font-size: 1.1em;
  line-height: 1;
  transition: transform var(--transition);
}
.btn:hover::after { transform: translateX(4px); }
.btn--no-arrow::after { content: none; }

/* =====================================================
   TYPOGRAPHY HELPERS
   ===================================================== */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.eyebrow--light { color: var(--gold-light); }

.h-display {
  font-family: var(--font-serif-jp);
  font-size: var(--h-display);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.02em;
}
.h-display--en {
  font-family: var(--font-serif-en);
  font-weight: 400;
  letter-spacing: 0.05em;
}
.h1 {
  font-family: var(--font-serif-jp);
  font-size: var(--h1);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.02em;
}
.h1--en {
  font-family: var(--font-serif-en);
  font-weight: 400;
  letter-spacing: 0.05em;
}
.h2 {
  font-family: var(--font-serif-jp);
  font-size: var(--h2);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.02em;
}
.h2--en {
  font-family: var(--font-serif-en);
  font-weight: 400;
}
.h3 {
  font-family: var(--font-serif-jp);
  font-size: var(--h3);
  font-weight: 500;
  line-height: 1.5;
}
.lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink);
}
.subhead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--ink);
  max-width: 640px;
}
.text-stone { color: var(--stone); }
.text-gold  { color: var(--gold); }
.text-navy  { color: var(--navy); }
.font-mono  { font-family: var(--font-mono); }

/* Section number style */
.section-number {
  font-family: var(--font-serif-en);
  font-size: 0.875rem;
  color: var(--gold);
  letter-spacing: 0.3em;
  font-weight: 600;
}

/* Gold horizontal rule */
.gold-rule {
  width: 64px;
  height: 1px;
  background: var(--gold);
  border: none;
  margin: 1.5rem 0;
}
.gold-rule--center { margin-left: auto; margin-right: auto; }

/* =====================================================
   SECTIONS
   ===================================================== */
section { position: relative; }
.section {
  padding: var(--space-xl) 0;
}
.section--lg { padding: var(--space-xxl) 0; }
.section--sm { padding: var(--space-lg) 0; }
.section--ink {
  background: var(--ink);
  color: var(--parchment);
}
.section--navy {
  background: var(--navy);
  color: var(--parchment);
}
.section--parchment-light {
  background: var(--parchment-light);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}
.section-header--left {
  text-align: left;
}
.section-header__title {
  margin-bottom: 0.5rem;
}
.section-header__subtitle {
  font-family: var(--font-serif-en);
  color: var(--gold);
  font-style: italic;
  font-size: 1.125rem;
  letter-spacing: 0.05em;
}

/* =====================================================
   HERO
   ===================================================== */
.hero {
  position: relative;
  padding: clamp(4rem, 10vw, 8rem) 0 clamp(5rem, 12vw, 10rem);
  overflow: hidden;
}
.hero--ink {
  background: var(--ink);
  color: var(--parchment);
}
.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 880px;
}
.hero__title {
  margin: 1rem 0 1.5rem;
}
.hero__subtitle {
  margin-bottom: 2.5rem;
  max-width: 640px;
}
.hero__cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

/* Decorative ornament for hero */
.hero__ornament {
  position: absolute;
  top: 50%;
  right: -8%;
  width: 50%;
  max-width: 600px;
  opacity: 0.06;
  transform: translateY(-50%);
  pointer-events: none;
}
.hero__ornament--light { opacity: 0.04; }

/* Corner ornaments (for ink hero) */
.hero--ink::before,
.hero--ink::after {
  content: '';
  position: absolute;
  width: 40px;
  height: 40px;
  border: 1px solid var(--gold);
  opacity: 0.5;
}
.hero--ink::before {
  top: 2rem;
  left: 2rem;
  border-right: none;
  border-bottom: none;
}
.hero--ink::after {
  bottom: 2rem;
  right: 2rem;
  border-left: none;
  border-top: none;
}

/* =====================================================
   GRIDS
   ===================================================== */
.grid {
  display: grid;
  gap: var(--space-md);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* =====================================================
   CARDS
   ===================================================== */
.card {
  position: relative;
  padding: 2rem 2rem 2.25rem;
  background: var(--white);
  border: 1px solid var(--mist);
  transition: transform var(--transition-long), box-shadow var(--transition-long), border-color var(--transition);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(10, 15, 28, 0.08);
  border-color: var(--gold);
}
.card__number {
  font-family: var(--font-serif-en);
  font-size: 1.75rem;
  color: var(--gold);
  font-weight: 400;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}
.card__title {
  font-family: var(--font-serif-jp);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}
.card__body {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink);
}

/* Top-accent card variant */
.card--accent::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-long);
}
.card:hover.card--accent::before { transform: scaleX(1); }

/* Service card */
.service-card {
  display: flex;
  flex-direction: column;
  padding: 2.5rem 2rem;
  background: var(--white);
  border: 1px solid var(--mist);
  transition: all var(--transition-long);
  height: 100%;
}
.service-card:hover {
  border-color: var(--gold);
  box-shadow: 0 16px 40px rgba(10, 15, 28, 0.08);
  transform: translateY(-2px);
}
.service-card__index {
  font-family: var(--font-serif-en);
  font-size: 0.875rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 1.25rem;
}
.service-card__title {
  font-family: var(--font-serif-jp);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}
.service-card__body {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}
.service-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.05em;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  align-self: flex-start;
  transition: border-color var(--transition);
}
.service-card__cta::after {
  content: '→';
  transition: transform var(--transition);
}
.service-card:hover .service-card__cta {
  border-color: var(--gold);
}
.service-card:hover .service-card__cta::after { transform: translateX(3px); }

/* =====================================================
   PHASE / STEP TIMELINE
   ===================================================== */
.phases {
  position: relative;
}
.phase {
  display: grid;
  grid-template-columns: minmax(120px, 180px) 1fr;
  gap: 3rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--mist);
}
.phase:first-child { padding-top: 0; }
.phase:last-child { border-bottom: none; padding-bottom: 0; }
.phase__index {
  font-family: var(--font-serif-en);
  color: var(--gold);
}
.phase__index-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  display: block;
  margin-bottom: 0.5rem;
}
.phase__index-number {
  font-size: 3rem;
  font-weight: 300;
  display: block;
  line-height: 1;
}
.phase__title {
  font-family: var(--font-serif-jp);
  font-size: 1.375rem;
  color: var(--navy);
  font-weight: 500;
  margin-bottom: 1rem;
}
.phase__body {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink);
  margin-bottom: 1rem;
}
.phase__activities {
  margin-top: 1.25rem;
}
.phase__activities li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--ink);
  margin-bottom: 0.3rem;
}
.phase__activities li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 1px;
  background: var(--gold);
}
.phase__duration {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--stone);
  margin-top: 1rem;
  display: inline-block;
  padding: 0.4rem 0.75rem;
  background: var(--parchment-light);
  border: 1px solid var(--mist);
}

/* =====================================================
   IP-P&L FRAMEWORK SECTION
   ===================================================== */
.ip-pl-framework {
  padding: var(--space-xl) 0;
  background: var(--ink);
  color: var(--parchment);
  position: relative;
  overflow: hidden;
}
.ip-pl-framework::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(168, 132, 51, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 132, 51, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.ip-pl-framework__inner {
  position: relative;
  z-index: 1;
}
.ip-pl-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(168, 132, 51, 0.2);
  margin-top: 3rem;
}
.ip-pl-column {
  background: var(--ink);
  padding: 2.5rem 2rem;
  position: relative;
}
.ip-pl-column__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 1rem;
}
.ip-pl-column__title {
  font-family: var(--font-serif-jp);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--parchment);
  margin-bottom: 1rem;
}
.ip-pl-column__body {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--mist);
}

/* Pull quote (used in About/Service pages) */
.pullquote {
  position: relative;
  padding: 2.5rem 2rem 2.5rem 3rem;
  border-left: 2px solid var(--gold);
  font-family: var(--font-serif-jp);
  font-size: 1.25rem;
  line-height: 1.85;
  color: var(--navy);
  font-weight: 400;
  background: var(--parchment-light);
  margin: 2rem 0;
}
.pullquote--on-dark {
  color: var(--gold-light);
  background: transparent;
  border-left-color: var(--gold);
}

/* =====================================================
   PROSE (long text content)
   ===================================================== */
.prose {
  max-width: var(--container-text);
}
.prose p {
  font-size: 1.0625rem;
  line-height: 1.95;
  margin-bottom: 1.5rem;
  color: var(--ink);
}
.prose h2 {
  font-family: var(--font-serif-jp);
  font-size: var(--h2);
  margin: 3.5rem 0 1.25rem;
  color: var(--navy);
  font-weight: 500;
  letter-spacing: 0.02em;
}
.prose h3 {
  font-family: var(--font-serif-jp);
  font-size: var(--h3);
  margin: 2.5rem 0 1rem;
  color: var(--ink);
  font-weight: 500;
}
.prose ul, .prose ol {
  margin: 0 0 1.5rem 1.5rem;
}
.prose ul li, .prose ol li {
  margin-bottom: 0.5rem;
  line-height: 1.85;
  font-size: 1rem;
}
.prose ul li { list-style: disc; }
.prose ol li { list-style: decimal; }
.prose strong { font-weight: 700; color: var(--navy); }

/* =====================================================
   COMPARISON TABLE
   ===================================================== */
.comparison {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--white);
  border: 1px solid var(--mist);
}
.comparison th, .comparison td {
  padding: 1rem 1.25rem;
  text-align: left;
  font-size: 0.9375rem;
  line-height: 1.7;
  border-bottom: 1px solid var(--mist);
  vertical-align: top;
}
.comparison th {
  background: var(--navy);
  color: var(--parchment);
  font-weight: 500;
  letter-spacing: 0.03em;
  font-size: 0.875rem;
}
.comparison td:first-child {
  font-weight: 500;
  color: var(--navy);
  background: var(--parchment-light);
  width: 24%;
}
.comparison .col-us {
  background: rgba(168, 132, 51, 0.06);
  font-weight: 500;
  color: var(--ink);
}
.comparison thead th.col-us {
  background: var(--gold);
  color: var(--ink);
}

/* =====================================================
   FAQ / Q-Style List (used for "こんな課題" sections)
   ===================================================== */
.challenge-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.challenge {
  position: relative;
  padding: 2rem;
  background: var(--white);
  border: 1px solid var(--mist);
  font-size: 0.9375rem;
  line-height: 1.85;
}
.challenge::before {
  content: '?';
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-family: var(--font-serif-en);
  font-size: 2rem;
  color: var(--gold);
  line-height: 1;
  opacity: 0.7;
}

/* =====================================================
   ARTICLE / INSIGHTS CARD
   ===================================================== */
.article-card {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  background: var(--white);
  border: 1px solid var(--mist);
  transition: all var(--transition-long);
  height: 100%;
}
.article-card:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}
.article-card__category {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 1rem;
  text-transform: uppercase;
}
.article-card__title {
  font-family: var(--font-serif-jp);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}
.article-card__lead {
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--stone);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}
.article-card__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--stone);
  letter-spacing: 0.05em;
}

/* Featured article (insights hero) */
.featured-article {
  background: var(--ink);
  color: var(--parchment);
  padding: 4rem 3rem;
  margin-bottom: 4rem;
  position: relative;
  overflow: hidden;
}
.featured-article::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 200px;
  height: 100%;
  background: radial-gradient(circle at right, rgba(168, 132, 51, 0.15), transparent 70%);
}
.featured-article__inner {
  position: relative;
  max-width: 720px;
}
.featured-article__title {
  font-family: var(--font-serif-jp);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 500;
  margin: 1rem 0 1.5rem;
  line-height: 1.4;
}
.featured-article__lead {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--mist);
  margin-bottom: 2rem;
}
.featured-article__meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--gold-light);
  margin-bottom: 1.5rem;
}

/* =====================================================
   FORM
   ===================================================== */
.form {
  max-width: 640px;
}
.form__group {
  margin-bottom: 1.5rem;
}
.form__label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
}
.form__label .required {
  color: var(--seal-red);
  margin-left: 0.25rem;
}
.form__hint {
  display: block;
  font-size: 0.8rem;
  color: var(--stone);
  margin-bottom: 0.5rem;
}
.form__input, .form__textarea, .form__select {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  background: var(--white);
  border: 1px solid var(--mist);
  color: var(--ink);
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: var(--font-serif-jp);
}
.form__input:focus, .form__textarea:focus, .form__select:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(168, 132, 51, 0.12);
}
.form__textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.7;
}
.form__radio-group, .form__checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}
.form__radio, .form__checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.9375rem;
  line-height: 1.6;
  cursor: pointer;
}
.form__radio input, .form__checkbox input {
  margin-top: 0.3rem;
  accent-color: var(--gold);
}

/* =====================================================
   FOOTER
   ===================================================== */
.site-footer {
  background: var(--ink);
  color: var(--mist);
  padding: var(--space-xl) 0 var(--space-md);
  position: relative;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}
.site-footer__brand img {
  max-width: 180px;
  margin-bottom: 1.5rem;
}
.site-footer__brand-tagline {
  font-family: var(--font-serif-en);
  color: var(--gold);
  font-size: 0.875rem;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}
.site-footer__brand-philosophy {
  font-family: var(--font-serif-jp);
  font-size: 0.9375rem;
  color: var(--mist);
  font-style: italic;
}
.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
}
.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}
.site-footer__link {
  font-size: 0.875rem;
  color: var(--mist);
  transition: color var(--transition);
}
.site-footer__link:hover { color: var(--gold-light); }
.site-footer__bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(228, 223, 210, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--stone);
}
.site-footer__copyright {
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}
.site-footer__legal {
  display: flex;
  gap: 1.5rem;
}
.site-footer__legal a {
  color: var(--stone);
  transition: color var(--transition);
}
.site-footer__legal a:hover { color: var(--gold-light); }

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .ip-pl-columns { grid-template-columns: 1fr; }
  .comparison th, .comparison td { font-size: 0.85rem; padding: 0.75rem; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  .primary-nav, .btn-header-cta { display: none; }
  .nav-toggle { display: flex; }
  .primary-nav.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--parchment);
    padding: 2rem var(--gutter);
    overflow-y: auto;
    z-index: 99;
    align-items: stretch;
    gap: 0;
  }
  .primary-nav.is-open .primary-nav__item {
    border-bottom: 1px solid var(--mist);
  }
  .primary-nav.is-open .primary-nav__link {
    padding: 1rem 0;
    font-size: 1rem;
  }
  .primary-nav.is-open .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
  }
  .has-dropdown__toggle::after { display: none; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .challenge-grid { grid-template-columns: 1fr; }
  .phase {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .phase__index-number { font-size: 2rem; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .site-footer__bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  .hero { padding: 3rem 0 4rem; }
  .hero--ink::before, .hero--ink::after { width: 24px; height: 24px; }
  .hero--ink::before { top: 1rem; left: 1rem; }
  .hero--ink::after { bottom: 1rem; right: 1rem; }
  .pullquote { padding: 2rem 1.5rem; font-size: 1.125rem; }
}

/* =====================================================
   ANIMATIONS
   ===================================================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up {
  animation: fadeUp 0.8s cubic-bezier(.4, 0, .2, 1) backwards;
}
.fade-up-1 { animation-delay: 0.05s; }
.fade-up-2 { animation-delay: 0.15s; }
.fade-up-3 { animation-delay: 0.25s; }
.fade-up-4 { animation-delay: 0.35s; }
.fade-up-5 { animation-delay: 0.45s; }

/* Reveal-on-scroll target style
   Note: requires .js class on <html> to activate. Otherwise visible by default. */
.reveal {
  opacity: 1;
  transform: none;
}
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(.4, 0, .2, 1), transform 0.8s cubic-bezier(.4, 0, .2, 1);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reduce motion support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* =====================================================
   PAGE HEADERS (for inner pages)
   ===================================================== */
.page-header {
  padding: clamp(3rem, 6vw, 5rem) 0 clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--mist);
}
.page-header__inner {
  max-width: 880px;
}

/* =====================================================
   UTILITIES
   ===================================================== */
.mt-0 { margin-top: 0 !important; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-0 { margin-bottom: 0 !important; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.text-center { text-align: center; }
.text-right  { text-align: right; }
.flex { display: flex; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.hide-mobile { display: block; }
.show-mobile { display: none; }
@media (max-width: 768px) {
  .hide-mobile { display: none; }
  .show-mobile { display: block; }
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--ink);
  color: var(--parchment);
  padding: 0.75rem 1.25rem;
  z-index: 200;
  transition: top var(--transition);
}
.skip-link:focus { top: 1rem; }

/* =====================================================
   ARTICLE (Insights individual page)
   ===================================================== */
.article-hero {
  padding: clamp(4rem, 8vw, 7rem) 0 clamp(3rem, 6vw, 5rem);
  background: var(--parchment-light);
  border-bottom: 1px solid var(--mist);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--stone);
  margin-bottom: 2rem;
  text-transform: uppercase;
}
.article-meta__category {
  color: var(--gold);
  font-weight: 700;
}
.article-meta__divider {
  width: 1px;
  height: 14px;
  background: var(--mist);
}
.article-title {
  font-family: var(--font-serif-jp);
  font-size: clamp(1.875rem, 4vw, 2.875rem);
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
  margin: 0.5rem 0 1rem;
  letter-spacing: 0.01em;
}
.article-subtitle {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--stone);
  max-width: 720px;
}

/* Notice/disclaimer block */
.article-notice {
  background: var(--white);
  border-left: 3px solid var(--gold);
  padding: 1.75rem 2rem;
  margin: 2.5rem 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--stone);
}
.article-notice strong {
  color: var(--navy);
  font-weight: 500;
}

/* TOC */
.article-toc {
  background: var(--parchment-light);
  border: 1px solid var(--mist);
  padding: 2rem 2.25rem;
  margin: 2.5rem 0 4rem;
}
.article-toc__title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 1rem;
  text-transform: uppercase;
}
.article-toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc-counter;
}
.article-toc__list li {
  counter-increment: toc-counter;
  padding: 0.5rem 0;
  border-bottom: 1px dotted var(--mist);
  font-size: 0.95rem;
  line-height: 1.6;
}
.article-toc__list li:last-child {
  border-bottom: none;
}
.article-toc__list li::before {
  content: counter(toc-counter, decimal-leading-zero) ".";
  color: var(--gold);
  font-family: var(--font-serif-en);
  font-size: 1rem;
  margin-right: 0.75rem;
}
.article-toc__list a {
  color: var(--ink);
  transition: color var(--transition);
}
.article-toc__list a:hover {
  color: var(--gold);
}

/* Article body */
.article-body {
  font-size: 1.0625rem;
  line-height: 1.95;
  color: var(--ink);
}
.article-body h2 {
  font-family: var(--font-serif-jp);
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 500;
  color: var(--navy);
  margin: 4.5rem 0 1.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--mist);
  letter-spacing: 0.02em;
  line-height: 1.4;
}
.article-body h2::before {
  display: block;
  font-family: var(--font-serif-en);
  font-size: 0.875rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  font-style: italic;
}
.article-body h2.chapter-1::before { content: "Chapter 01"; }
.article-body h2.chapter-2::before { content: "Chapter 02"; }
.article-body h2.chapter-3::before { content: "Chapter 03"; }
.article-body h2.chapter-4::before { content: "Chapter 04"; }
.article-body h2.chapter-5::before { content: "Chapter 05"; }
.article-body h2.chapter-6::before { content: "Chapter 06"; }
.article-body h2.chapter-7::before { content: "Chapter 07"; }
.article-body h3 {
  font-family: var(--font-serif-jp);
  font-size: 1.3125rem;
  font-weight: 500;
  color: var(--ink);
  margin: 3rem 0 1.25rem;
  letter-spacing: 0.01em;
}
.article-body h4 {
  font-family: var(--font-serif-jp);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--navy);
  margin: 2rem 0 0.75rem;
}
.article-body p {
  margin-bottom: 1.5rem;
}
.article-body p:first-of-type {
  margin-top: 0;
}
.article-body ul, .article-body ol {
  margin: 0 0 1.75rem 1.75rem;
}
.article-body ul li, .article-body ol li {
  margin-bottom: 0.6rem;
  line-height: 1.85;
}
.article-body ul li { list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body strong {
  font-weight: 700;
  color: var(--navy);
}
.article-body em {
  font-style: italic;
  color: var(--navy);
}
.article-body blockquote {
  border-left: 3px solid var(--gold);
  padding: 1.25rem 1.75rem;
  margin: 2rem 0;
  background: var(--parchment-light);
  font-family: var(--font-serif-jp);
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--navy);
  font-style: italic;
}
.article-body hr {
  border: none;
  border-top: 1px solid var(--mist);
  margin: 4rem 0;
}
.article-body hr.gold-rule-section {
  border: none;
  width: 60px;
  height: 1px;
  background: var(--gold);
  margin: 4rem auto;
}

/* Case-study mini cards within article */
.case-study-block {
  background: var(--white);
  border: 1px solid var(--mist);
  border-left: 3px solid var(--gold);
  padding: 2rem 2.25rem;
  margin: 2rem 0 3rem;
}
.case-study-block__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.case-study-block__title {
  font-family: var(--font-serif-jp);
  font-size: 1.3125rem;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 1rem;
}

/* References list */
.article-references {
  margin-top: 5rem;
  padding: 2.5rem 2.25rem;
  background: var(--parchment-light);
  border: 1px solid var(--mist);
}
.article-references h3 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin: 0 0 1.5rem;
  text-transform: uppercase;
  border: none;
}
.article-references h4 {
  font-family: var(--font-serif-jp);
  font-size: 1rem;
  color: var(--navy);
  font-weight: 700;
  margin: 1.75rem 0 0.5rem;
}
.article-references ul {
  margin: 0 0 1rem 1.5rem;
  font-size: 0.875rem;
}
.article-references ul li {
  margin-bottom: 0.35rem;
  line-height: 1.7;
  color: var(--ink);
  list-style: disc;
}

/* Article footer / closing */
.article-footer {
  margin-top: 5rem;
  padding-top: 3rem;
  border-top: 1px solid var(--mist);
  font-size: 0.875rem;
  color: var(--stone);
  line-height: 1.85;
}
.article-footer p {
  margin-bottom: 0.5rem;
}
.article-footer__quote {
  font-family: var(--font-serif-jp);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--gold);
  margin: 2rem 0;
  text-align: center;
}

/* Next articles */
.next-articles {
  padding: var(--space-lg) 0;
  background: var(--parchment-light);
  border-top: 1px solid var(--mist);
}