/* =========================================================
   FERTUM — The Curated Mariage
   Design System
   ========================================================= */

:root {
  --ink: #0F0E0C;
  --ink-soft: #1A1916;
  --ivory: #F6F1E7;
  --ivory-deep: #EDE5D2;
  --paper: #FBF8F1;
  --gold: #B8965A;
  --gold-light: #D4B884;
  --gold-deep: #8C6F3E;
  --terra: #B8543A;
  --bordeaux: #4A1419;
  --sage: #C8C8B8;
  --gray-soft: #ADA89E;
  --gray-line: rgba(184, 150, 90, 0.25);

  --serif-en: 'Cormorant Garamond', 'Marcellus', serif;
  --serif-jp: 'Noto Serif JP', '游明朝', 'Yu Mincho', serif;
  --sans-jp: 'Noto Sans JP', 'Hiragino Sans', sans-serif;

  --max: 1320px;
  --read: 640px;
  --gap-section: clamp(70px, 8vw, 120px);
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

/* =========================================================
   CUSTOM CURSOR + SCROLL PROGRESS
   ========================================================= */
.cursor, .cursor-dot {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  border-radius: 50%;
  mix-blend-mode: difference;
  transition: transform .25s cubic-bezier(.22,.61,.36,1), opacity .3s ease, background .3s ease, border-color .3s ease;
  opacity: 0;
}
.cursor {
  width: 36px; height: 36px;
  border: 1px solid #B8965A;
  transform: translate(-50%, -50%);
}
.cursor-dot {
  width: 4px; height: 4px;
  background: #F4EBDD;
  transform: translate(-50%, -50%);
}
.cursor.visible, .cursor-dot.visible { opacity: 1; }
.cursor.hover {
  width: 64px; height: 64px;
  background: rgba(184, 150, 90, 0.18);
  border-color: rgba(184, 150, 90, 0.7);
}
.cursor-dot.hover { opacity: 0; }

@media (hover: none), (max-width: 960px) {
  .cursor, .cursor-dot { display: none; }
}

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  z-index: 200;
  transition: width .1s linear;
}
body {
  font-family: var(--sans-jp);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.85;
  font-weight: 300;
  letter-spacing: 0.04em;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
em { font-style: normal; color: var(--gold-deep); font-weight: 400; }

/* ---------- NAV ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 22px 48px;
  display: flex;
  justify-content: center;
  transition: background .5s ease, padding .5s ease, backdrop-filter .5s ease;
}
.nav.scrolled {
  background: rgba(15, 14, 12, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 14px 48px;
  border-bottom: 1px solid rgba(184, 150, 90, 0.12);
}
.nav-inner {
  width: 100%; max-width: var(--max);
  display: flex; align-items: center; justify-content: space-between;
  gap: 40px;
}
.nav-logo {
  font-family: var(--serif-en);
  font-weight: 400;
  font-size: 18px;
  letter-spacing: 0.5em;
  color: var(--ivory);
  padding-left: 0.5em;
}
.nav-links {
  display: flex; gap: 36px;
}
.nav-links a {
  font-family: var(--serif-en);
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--ivory);
  opacity: 0.75;
  transition: opacity .3s ease;
  position: relative;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 1px; background: var(--gold);
  transition: width .4s ease;
}
.nav-links a:hover { opacity: 1; }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  font-family: var(--serif-en);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--ivory);
  border: 1px solid var(--gold);
  padding: 11px 22px;
  transition: background .3s ease, color .3s ease;
}
.nav-cta:hover {
  background: var(--gold);
  color: var(--ink);
}

/* Hamburger */
.nav-burger {
  display: none;
  width: 38px; height: 38px;
  background: transparent;
  border: 1px solid var(--gold);
  cursor: pointer;
  position: relative;
}
.nav-burger span {
  position: absolute;
  left: 8px; right: 8px;
  height: 1px;
  background: var(--ivory);
  transition: transform .4s ease, top .4s ease, opacity .3s ease;
}
.nav-burger span:nth-child(1) { top: 14px; }
.nav-burger span:nth-child(2) { top: 22px; }
.nav-burger.open span:nth-child(1) { top: 18px; transform: rotate(45deg); }
.nav-burger.open span:nth-child(2) { top: 18px; transform: rotate(-45deg); }

/* Drawer */
.drawer {
  position: fixed;
  inset: 0;
  background: var(--ink);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity .5s ease;
  display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  padding: 60px 24px;
}
.drawer.open {
  opacity: 1;
  pointer-events: auto;
}
.drawer-nav {
  display: flex; flex-direction: column; gap: 18px;
  text-align: center;
}
.drawer-nav a {
  font-family: var(--serif-en);
  font-size: 22px;
  letter-spacing: 0.2em;
  color: var(--ivory);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease, color .3s ease;
}
.drawer-nav a:hover { color: var(--gold); }
.drawer.open .drawer-nav a {
  opacity: 1;
  transform: translateY(0);
}
.drawer.open .drawer-nav a:nth-child(1) { transition-delay: .1s; }
.drawer.open .drawer-nav a:nth-child(2) { transition-delay: .15s; }
.drawer.open .drawer-nav a:nth-child(3) { transition-delay: .2s; }
.drawer.open .drawer-nav a:nth-child(4) { transition-delay: .25s; }
.drawer.open .drawer-nav a:nth-child(5) { transition-delay: .3s; }
.drawer.open .drawer-nav a:nth-child(6) { transition-delay: .35s; }
.drawer.open .drawer-nav a:nth-child(7) { transition-delay: .4s; }
.drawer.open .drawer-nav a:nth-child(8) { transition-delay: .45s; }
.drawer.open .drawer-nav a:nth-child(9) { transition-delay: .5s; }
.drawer-footer {
  position: absolute;
  bottom: 40px; left: 0; right: 0;
  text-align: center;
  font-family: var(--serif-jp);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--gold-light);
  opacity: 0.7;
}

/* ---------- COVER ---------- */
.cover {
  position: relative;
  min-height: 100vh;
  background: var(--ink);
  color: var(--ivory);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  text-align: center;
}
.cover-bg {
  position: absolute; inset: 0;
  background: url('https://images.unsplash.com/photo-1547595628-c61a29f496f0?w=2000&q=88&auto=format') center/cover;
  opacity: 0.5;
  transform: scale(1.05);
  animation: kenburns 22s ease-in-out infinite alternate;
  will-change: transform;
}
@keyframes kenburns {
  from { transform: scale(1.05); }
  to { transform: scale(1.18); }
}
.cover-vignette {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at center, transparent 30%, rgba(15,14,12,0.85) 100%),
    linear-gradient(180deg, rgba(15,14,12,0.55) 0%, rgba(15,14,12,0.35) 50%, rgba(15,14,12,0.95) 100%);
}
.cover-content {
  position: relative; z-index: 2;
  max-width: 1100px; padding: 0 24px;
}
.cover-tag {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 0.42em;
  color: var(--ivory);
  margin-bottom: 60px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}
.cover-title {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: clamp(52px, 9vw, 120px);
  line-height: 1;
  letter-spacing: 0.22em;
  margin-bottom: 30px;
  display: block;
  padding-left: 0.22em;
  white-space: nowrap;
}
.cover-title span {
  display: inline-block;
  opacity: 0;
  transform: translateY(30px);
  animation: letterIn .9s cubic-bezier(.22,.61,.36,1) forwards;
}
.cover-title span:nth-child(1) { animation-delay: 0.2s; }
.cover-title span:nth-child(2) { animation-delay: 0.32s; }
.cover-title span:nth-child(3) { animation-delay: 0.44s; }
.cover-title span:nth-child(4) { animation-delay: 0.56s; }
.cover-title span:nth-child(5) { animation-delay: 0.68s; }
.cover-title span:nth-child(6) { animation-delay: 0.80s; }
@keyframes letterIn {
  to { opacity: 1; transform: translateY(0); }
}
.cover-sub {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 400;
  font-size: 18px;
  letter-spacing: 0.32em;
  color: var(--ivory);
  opacity: 1;
  margin-bottom: 80px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
}
.cover-jp {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: clamp(16px, 1.6vw, 20px);
  letter-spacing: 0.32em;
  color: var(--ivory);
  margin-bottom: 40px;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.7);
}
.cover-scroll {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  z-index: 3;
}
.cover-scroll span {
  font-family: var(--serif-en);
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--gold-light);
}
.scroll-line {
  width: 1px; height: 70px;
  background: linear-gradient(180deg, var(--gold-light), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); transform-origin: top; opacity: 0.7; }
  50% { transform: scaleY(0.4); opacity: 1; }
}

/* ---------- SECTION COMMON ---------- */
.section {
  position: relative;
  padding: var(--gap-section) 48px;
  max-width: var(--max);
  margin: 0 auto;
}
.section-value, .section-collection {
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(184, 150, 90, 0.12) 0%, transparent 55%),
    radial-gradient(ellipse 90% 50% at 50% 100%, rgba(219, 169, 185, 0.08) 0%, transparent 55%),
    var(--ink);
  color: var(--ivory);
  max-width: none;
  padding-left: 48px; padding-right: 48px;
  position: relative;
  overflow: hidden;
}
/* Refined side ornament lines */
.section-value::before, .section-collection::before {
  content: "";
  position: absolute;
  top: 8%; bottom: 8%;
  left: 32px;
  width: 1px;
  background: linear-gradient(180deg, transparent 0%, rgba(184, 150, 90, 0.45) 30%, rgba(184, 150, 90, 0.45) 70%, transparent 100%);
  pointer-events: none;
}
.section-value::after, .section-collection::after {
  content: "";
  position: absolute;
  top: 8%; bottom: 8%;
  right: 32px;
  width: 1px;
  background: linear-gradient(180deg, transparent 0%, rgba(184, 150, 90, 0.45) 30%, rgba(184, 150, 90, 0.45) 70%, transparent 100%);
  pointer-events: none;
}
.section-value > *, .section-collection > * {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin-left: auto; margin-right: auto;
}

/* Chapter mark */
.chapter-mark {
  display: flex; align-items: baseline; gap: 24px;
  margin-bottom: 80px;
  border-bottom: 1px solid var(--gray-line);
  padding-bottom: 24px;
}
.chap-num {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(80px, 11vw, 150px);
  line-height: 0.85;
  color: var(--gold);
  opacity: 0.95;
}
.chap-label {
  font-family: var(--serif-en);
  font-size: 14px;
  letter-spacing: 0.5em;
  color: var(--ink);
  text-transform: uppercase;
}
.chapter-mark.light .chap-label { color: var(--ivory); }

/* Headings */
.title-jp {
  font-family: var(--serif-jp);
  font-weight: 300;
  font-size: clamp(28px, 3.6vw, 48px);
  line-height: 1.55;
  letter-spacing: 0.12em;
  color: var(--ink);
  word-break: keep-all;
  line-break: strict;
  overflow-wrap: anywhere;
}

/* Phrase keeper — prevents breaks inside, allows wrapping at boundaries */
.nowrap {
  display: inline-block;
  white-space: nowrap;
}

/* Conditional line breaks per breakpoint */
.br-mobile { display: none; }
@media (max-width: 720px) {
  .br-mobile { display: inline; }
  .br-desktop { display: none; }
}
.title-jp.center { text-align: center; }
.title-jp.light { color: var(--ivory); }
.title-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: 16px;
  letter-spacing: 0.3em;
  color: var(--gold-deep);
  margin-top: 14px;
}
.lead {
  font-family: var(--serif-jp);
  font-weight: 300;
  font-size: 16px;
  line-height: 2.1;
  letter-spacing: 0.12em;
  color: var(--ink);
  opacity: 0.85;
  margin-top: 28px;
  word-break: keep-all;
  line-break: strict;
  overflow-wrap: anywhere;
}
.lead.center { text-align: center; }
.lead.light { color: var(--ivory); opacity: 0.78; }
.body {
  font-size: 14.5px;
  line-height: 2.0;
  margin-top: 22px;
  color: var(--ink);
  opacity: 0.78;
  word-break: keep-all;
  line-break: strict;
  overflow-wrap: anywhere;
}

/* Japanese typography — kinsoku for all JP text containers */
.cover-jp,
.aud-desc, .aud-jp, .aud-footer,
.val-desc, .val-jp,
.prod-jp, .prod-desc,
.scene-jp,
.closing-jp, .closing-body,
.faq-q, .faq-a,
.proc-jp, .proc-desc {
  word-break: keep-all;
  line-break: strict;
  overflow-wrap: anywhere;
}
.section-head {
  text-align: center;
  margin-bottom: 100px;
}

.rule-gold {
  width: 60px; height: 1px;
  background: var(--gold);
  margin: 30px 0;
}
.rule-gold.center { margin: 30px auto; }

/* Reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.1s cubic-bezier(.22,.61,.36,1), transform 1.1s cubic-bezier(.22,.61,.36,1);
}
[data-reveal].in {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   I. CONCEPT
   ========================================================= */
.concept-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: center;
}
.img-frame {
  position: relative;
  aspect-ratio: 3/2;
  overflow: hidden;
  background: var(--ink);
}
.img-frame::before {
  content: ""; position: absolute; inset: 12px;
  border: 1px solid rgba(184, 150, 90, 0.5);
  z-index: 2; pointer-events: none;
}
.img-frame::after {
  content: ""; position: absolute; inset: 0;
  background: var(--ink);
  z-index: 3;
  display: none;
  transform-origin: top;
  transform: scaleY(1);
  transition: transform 1.4s cubic-bezier(.77,0,.18,1);
}
[data-reveal].in .img-frame::after { transform: scaleY(0); }
.img-frame img {
  width: 100%; height: 100%; object-fit: cover;
  transition: filter 1s ease;
  filter: saturate(0.92) brightness(1.04) contrast(1.05) sepia(0.04);
  animation: kenBurns 16s ease-in-out infinite alternate;
}
@keyframes kenBurns {
  0%   { transform: scale(1.0) translate(0, 0); }
  50%  { transform: scale(1.06) translate(-1.2%, -0.8%); }
  100% { transform: scale(1.12) translate(-2.5%, -1.5%); }
}
/* Luxury: subtle inner gold glow that breathes */
.img-frame::before {
  animation: frameGlow 6s ease-in-out infinite alternate;
}
@keyframes frameGlow {
  0%   { box-shadow: 0 0 0 rgba(184, 150, 90, 0); border-color: rgba(184, 150, 90, 0.4); }
  100% { box-shadow: 0 0 30px rgba(184, 150, 90, 0.25) inset; border-color: rgba(184, 150, 90, 0.7); }
}
.visual-caption {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0.25em;
  color: var(--gold-deep);
  text-align: center;
  margin-top: 22px;
}

/* =========================================================
   II. AUDIENCE
   ========================================================= */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  margin-bottom: 80px;
}
.aud-card {
  background: var(--paper);
  border: 1px solid var(--gray-line);
  transition: transform .6s ease, box-shadow .6s ease;
}
.aud-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 30px 80px -30px rgba(15, 14, 12, 0.25);
}
.aud-img {
  height: 320px;
  background-size: cover; background-position: center;
  filter: grayscale(0.4) contrast(0.95);
  transition: filter .8s ease;
}
.aud-card:hover .aud-img { filter: grayscale(0) contrast(1); }
.aud-body {
  padding: 36px 30px 40px;
}
.aud-en {
  font-family: var(--serif-en);
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--gold-deep);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.aud-jp {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.6;
  letter-spacing: 0.1em;
  margin-bottom: 22px;
  color: var(--ink);
}
.aud-desc {
  font-size: 14px;
  line-height: 2.0;
  color: var(--ink);
  opacity: 0.75;
}
.aud-footer {
  text-align: center;
  font-family: var(--serif-jp);
  font-size: 16px;
  line-height: 2.1;
  letter-spacing: 0.1em;
  color: var(--ink);
  opacity: 0.85;
}

/* =========================================================
   III. VALUE  (dark)
   ========================================================= */
.value-list {
  display: flex; flex-direction: column;
  border-top: 1px solid rgba(184, 150, 90, 0.18);
}
.val-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 60px;
  padding: 60px 0;
  border-bottom: 1px solid rgba(184, 150, 90, 0.18);
  align-items: start;
  transition: padding-left .6s ease;
}
.val-row:hover { padding-left: 24px; }
.val-num {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: 96px;
  line-height: 0.85;
  color: var(--gold);
  opacity: 0.95;
}
.val-en {
  font-family: var(--serif-en);
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--gold-light);
  margin-bottom: 18px;
}
.val-jp {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: 26px;
  letter-spacing: 0.12em;
  margin-bottom: 22px;
  color: var(--ivory);
}
.val-desc {
  max-width: 640px;
  font-size: 14.5px;
  line-height: 2.05;
  color: var(--ivory);
  opacity: 0.72;
}

/* =========================================================
   IV. COMPARISON
   ========================================================= */
.compare-table {
  border-top: 1px solid var(--ink);
}
.ct-head {
  display: grid;
  grid-template-columns: 240px 1fr 1fr;
  padding: 24px 0;
  border-bottom: 1px solid var(--ink);
}
.ct-head .ct-col-other,
.ct-head .ct-col-fertum {
  font-family: var(--serif-en);
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink);
}
.ct-head .ct-col-other { color: var(--gray-soft); }
.ct-head .ct-col-fertum { color: var(--gold-deep); font-weight: 500; }
.ct-row {
  display: grid;
  grid-template-columns: 240px 1fr 1fr;
  padding: 36px 0;
  border-bottom: 1px solid var(--gray-line);
  align-items: center;
}
.ct-col-label {
  display: flex; flex-direction: column; gap: 6px;
}
.lbl-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--gold-deep);
}
.lbl-jp {
  font-family: var(--serif-jp);
  font-size: 16px;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.ct-col-other {
  font-size: 14px;
  color: var(--gray-soft);
  padding-right: 30px;
  word-break: keep-all;
  line-break: strict;
  overflow-wrap: anywhere;
}
.ct-col-fertum {
  font-family: var(--serif-jp);
  font-size: 15.5px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--ink);
  display: flex; align-items: center; gap: 14px;
  word-break: keep-all;
  line-break: strict;
  overflow-wrap: anywhere;
}
.diamond {
  color: var(--gold);
  font-size: 11px;
  flex-shrink: 0;
}

/* =========================================================
   V. COLLECTION (dark)
   ========================================================= */
.collection-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: end;
}
.prod-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: rgba(255,255,255,0.02);
  border: 2px solid rgba(184, 150, 90, 0.35);
  padding: 78px 36px 50px;
  position: relative;
  transition: transform .6s ease, border-color .6s ease, background .6s ease, box-shadow .6s ease;
  box-shadow: 0 8px 32px -16px rgba(184, 150, 90, 0.15);
  cursor: pointer;
}
.prod-card:hover {
  transform: translateY(-12px);
  border-color: var(--gold);
  background: rgba(184, 150, 90, 0.04);
  box-shadow: 0 16px 48px -16px rgba(184, 150, 90, 0.3);
}
.prod-card.featured {
  padding-top: 78px; padding-bottom: 70px;
}
.prod-card.luxury {
  background: rgba(255,255,255,0.02);
}
.prod-roman {
  position: absolute;
  top: 22px; right: 28px;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 36px;
  color: var(--gold);
  opacity: 0.7;
  z-index: 2;
}
.prod-img {
  width: 100%;
  aspect-ratio: 3/2;
  background-size: cover; background-position: center;
  margin-bottom: 36px;
  filter: saturate(0.95) brightness(0.96);
}
.prod-name {
  font-family: var(--serif-en);
  font-weight: 400;
  font-size: 32px;
  letter-spacing: 0.1em;
  color: var(--ivory);
  margin-bottom: 6px;
}
.prod-name-jp {
  font-family: var(--serif-jp);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gold-light);
  margin-bottom: 26px;
}
.prod-price {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: 28px;
  letter-spacing: 0.08em;
  color: var(--ivory);
  border-top: 1px solid rgba(184, 150, 90, 0.25);
  padding-top: 22px;
  margin-bottom: 22px;
  display: flex; align-items: baseline; gap: 14px;
}
.prod-price span {
  font-family: var(--sans-jp);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold-light);
  opacity: 0.7;
}
.prod-desc {
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--ivory);
  opacity: 0.7;
  margin-bottom: 36px;
}
.prod-btn {
  display: inline-block;
  font-family: var(--serif-en);
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--gold-light);
  border: 1px solid var(--gold);
  padding: 14px 28px;
  transition: background .35s ease, color .35s ease;
}
.prod-btn:hover {
  background: var(--gold);
  color: var(--ink);
}

/* =========================================================
   VI. SCENES
   ========================================================= */
.scenes-grid {
  display: flex; flex-direction: column; gap: 100px;
}
.scene-block {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
}
.scene-block.reverse { grid-template-columns: 1fr 1.2fr; }
.scene-block.reverse .scene-img { order: 2; }
.scene-img {
  aspect-ratio: 4/5;
  background-size: cover; background-position: center;
  filter: grayscale(0.5) sepia(0.15);
  position: relative;
}
.scene-img::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(74, 20, 25, 0.15) 100%);
}
.scene-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.32em;
  color: var(--gold-deep);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.scene-jp {
  font-family: var(--serif-jp);
  font-weight: 300;
  font-size: 32px;
  letter-spacing: 0.12em;
  margin-bottom: 30px;
}
.scene-block blockquote {
  font-family: var(--serif-jp);
  font-weight: 300;
  font-size: 22px;
  line-height: 1.85;
  letter-spacing: 0.1em;
  color: var(--bordeaux);
  border-left: 2px solid var(--gold);
  padding: 6px 0 6px 24px;
  margin-bottom: 36px;
}
.scene-list {
  list-style: none;
}
.scene-list li {
  font-family: var(--serif-jp);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--ink);
  padding: 16px 0;
  border-bottom: 1px solid var(--gray-line);
  display: flex; flex-direction: column; gap: 4px;
}
.scene-list li small {
  font-family: var(--sans-jp);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--gray-soft);
}

/* =========================================================
   VII. PROCESS
   ========================================================= */
.process-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  padding-top: 30px;
}
.proc-line {
  position: absolute;
  top: 60px; left: 8%; right: 8%;
  height: 1px;
  background: var(--gray-line);
  z-index: 0;
}
.proc-step {
  position: relative;
  text-align: center;
  padding: 0 8px;
}
.proc-dot {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--gold);
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 400;
  font-size: 18px;
  color: var(--gold-deep);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 30px;
  position: relative; z-index: 1;
  transition: background .4s ease, color .4s ease, transform .4s ease;
}
.proc-step:hover .proc-dot {
  background: var(--gold);
  color: var(--ivory);
  transform: scale(1.08);
}
.proc-step h4 {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: 17px;
  letter-spacing: 0.16em;
  margin-bottom: 16px;
  color: var(--ink);
}
.proc-step p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--ink);
  opacity: 0.7;
}

/* =========================================================
   VIII. FAQ
   ========================================================= */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--gray-line);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 32px 44px 32px 0;
  display: flex; align-items: baseline; gap: 24px;
  font-family: var(--serif-jp);
  font-size: 17px;
  letter-spacing: 0.08em;
  color: var(--ink);
  position: relative;
  transition: color .3s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute; right: 0;
  font-family: var(--serif-en);
  font-size: 28px;
  font-weight: 300;
  color: var(--gold);
  transition: transform .4s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { color: var(--gold-deep); }
.q-mark {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 22px;
  color: var(--gold);
  flex-shrink: 0;
}
.faq-body {
  padding: 0 0 36px 50px;
  font-size: 14px;
  line-height: 2.0;
  color: var(--ink);
  opacity: 0.75;
}

/* =========================================================
   IX. CLOSING
   ========================================================= */
.section-closing {
  background: var(--ink);
  color: var(--ivory);
  max-width: none;
  padding: 180px 48px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.section-closing::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 50% 30%, rgba(184, 150, 90, 0.08), transparent 60%);
  pointer-events: none;
}
.closing-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative; z-index: 1;
  padding-bottom: 140px;
}
.closing-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.4em;
  color: var(--gold-light);
  margin-bottom: 50px;
}
.closing-jp {
  font-family: var(--serif-jp);
  font-weight: 200;
  font-size: clamp(20px, 3.6vw, 48px);
  line-height: 1.6;
  letter-spacing: 0.10em;
  color: var(--ivory);
  white-space: nowrap;
}
.closing-body {
  font-family: var(--serif-jp);
  font-weight: 300;
  font-size: 15.5px;
  line-height: 2.2;
  letter-spacing: 0.12em;
  color: var(--ivory);
  opacity: 0.8;
  margin-bottom: 60px;
}
.closing-cta {
  display: inline-block;
  font-family: var(--serif-en);
  font-size: 14px;
  letter-spacing: 0.32em;
  color: var(--ivory);
  border: 1px solid var(--gold);
  padding: 18px 48px;
  transition: background .4s ease, color .4s ease, letter-spacing .4s ease;
}
.closing-cta:hover {
  background: var(--gold);
  color: var(--ink);
  letter-spacing: 0.42em;
}
.closing-info {
  margin-top: 100px;
  display: flex; flex-direction: column; gap: 8px;
  font-family: var(--serif-en);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold-light);
  opacity: 0.7;
}
.footer {
  position: relative; z-index: 1;
  border-top: 1px solid rgba(184, 150, 90, 0.15);
  padding: 30px 48px;
  text-align: center;
  font-family: var(--serif-en);
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--gold-light);
  opacity: 0.55;
}

/* =========================================================
   RESPONSIVE — TABLET (≤1024px)
   ========================================================= */
@media (max-width: 1024px) {
  .section { padding: 110px 36px; }
  .section-value, .section-collection, .section-closing { padding-left: 36px; padding-right: 36px; }
  .audience-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .audience-grid > :last-child { grid-column: 1 / -1; max-width: 50%; margin: 0 auto; }
  .collection-grid { grid-template-columns: 1fr; max-width: 600px; margin: 0 auto; gap: 30px; }
  .scene-block, .scene-block.reverse { grid-template-columns: 1fr; gap: 40px; }
  .scene-block.reverse .scene-img { order: 0; }
  .process-flow { grid-template-columns: repeat(2, 1fr); gap: 50px 24px; }
  .proc-line { display: none; }
  .nav-links { gap: 24px; }
  .nav-links a { font-size: 12px; }
}

/* =========================================================
   RESPONSIVE — MOBILE (≤720px)
   ========================================================= */
@media (max-width: 720px) {
  :root { --gap-section: 90px; }
  body { letter-spacing: 0.02em; }
  .nav { padding: 14px 18px; }
  .nav.scrolled { padding: 10px 18px; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-burger { display: block; }
  .nav-logo { font-size: 15px; letter-spacing: 0.4em; }

  /* Cover */
  .cover-tag { font-size: 11px; letter-spacing: 0.32em; margin-bottom: 36px; }
  .cover-title { font-size: 52px; letter-spacing: 0.18em; padding-left: 0.18em; }
  .cover-sub { font-size: 14px; letter-spacing: 0.24em; margin-bottom: 50px; }
  .cover-jp { font-size: 14px; letter-spacing: 0.22em; margin-bottom: 28px; }
  .cover-scroll { bottom: 24px; }

  /* Sections */
  .section { padding: 90px 22px; }
  .section-value, .section-collection, .section-closing { padding-left: 44px; padding-right: 44px; }
  /* Pull gold ornament lines closer to edge so they frame the content cleanly */
  .section-value::before, .section-collection::before { left: 22px; }
  .section-value::after, .section-collection::after { right: 22px; }
  .section-head { margin-bottom: 60px; }
  .chap-num { font-size: 64px; }
  .chap-label { font-size: 11px; letter-spacing: 0.4em; }
  .chapter-mark { gap: 14px; margin-bottom: 40px; padding-bottom: 18px; }
  .title-jp { font-size: 22px; line-height: 1.65; letter-spacing: 0.06em; }
  .title-en { font-size: 13px; letter-spacing: 0.22em; }
  .lead { font-size: 14px; line-height: 2.0; letter-spacing: 0.04em; }
  .body { font-size: 13.5px; }

  /* I. CONCEPT */
  .concept-grid { grid-template-columns: 1fr; gap: 50px; }
  .img-frame { aspect-ratio: 3/2; }

  /* II. AUDIENCE */
  .audience-grid { grid-template-columns: 1fr; gap: 22px; margin-bottom: 60px; }
  .audience-grid > :last-child {
    max-width: 100%;
    grid-column: auto;
    margin: 0;
    width: 100%;
  }
  .aud-card { width: 100%; }
  .aud-img { height: 240px; width: 100%; }
  .aud-body { padding: 28px 24px 32px; }
  .aud-jp { font-size: 19px; }
  .aud-footer { font-size: 13.5px; line-height: 2.0; }

  /* III. VALUE */
  .val-row { grid-template-columns: 1fr; gap: 16px; padding: 36px 0; }
  .val-row:hover { padding-left: 0; }
  .val-num { font-size: 56px; }
  .val-jp { font-size: 21px; margin-bottom: 16px; }
  .val-desc { font-size: 13.5px; line-height: 1.95; }

  /* IV. COMPARISON */
  .ct-head { display: none; }
  .ct-row {
    display: block;
    padding: 28px 0;
    border-bottom: 1px solid var(--gray-line);
  }
  .ct-col-label { margin-bottom: 18px; }
  .lbl-jp { font-size: 17px; }
  .ct-col-other, .ct-col-fertum {
    padding: 12px 16px;
    margin-bottom: 8px;
    font-size: 14px;
    border-left: 2px solid transparent;
  }
  .ct-col-other {
    background: rgba(173, 168, 158, 0.08);
    border-left-color: var(--gray-soft);
    color: var(--gray-soft);
  }
  .ct-col-other::before {
    content: "一般的なギフトショップ";
    display: block;
    font-family: var(--serif-en);
    font-size: 10px;
    letter-spacing: 0.3em;
    color: var(--gray-soft);
    margin-bottom: 6px;
    text-transform: uppercase;
  }
  .ct-col-fertum {
    background: rgba(184, 150, 90, 0.06);
    border-left-color: var(--gold);
    display: block;
  }
  .ct-col-fertum .diamond {
    margin-right: 8px;
    vertical-align: middle;
  }
  .ct-col-fertum::before {
    content: "FERTUM";
    display: block;
    font-family: var(--serif-en);
    font-size: 10px;
    letter-spacing: 0.4em;
    color: var(--gold-deep);
    margin-bottom: 6px;
    font-weight: 500;
  }

  /* V. COLLECTION */
  .collection-grid { grid-template-columns: 1fr; gap: 24px; max-width: none; }
  .prod-card, .prod-card.featured { padding: 60px 24px 36px; }
  .prod-roman { top: 14px; right: 22px; font-size: 28px; }
  .prod-img { aspect-ratio: 3/2; margin-bottom: 28px; }
  .prod-name { font-size: 26px; }
  .prod-price { font-size: 24px; }
  .prod-desc { font-size: 13px; }

  /* VI. SCENES */
  .scenes-grid { gap: 70px; }
  .scene-block, .scene-block.reverse { grid-template-columns: 1fr; gap: 30px; }
  .scene-img { aspect-ratio: 4/3.5; }
  .scene-jp { font-size: 24px; margin-bottom: 22px; }
  .scene-block blockquote { font-size: 18px; line-height: 1.75; padding-left: 18px; margin-bottom: 26px; }

  /* VII. PROCESS */
  .process-flow { grid-template-columns: 1fr; gap: 28px; }
  .proc-line { display: none; }
  .proc-step {
    display: grid;
    grid-template-columns: 70px 1fr;
    grid-template-areas: "dot title" "dot desc";
    gap: 4px 20px;
    text-align: left;
    align-items: start;
    padding: 0;
  }
  .proc-dot {
    grid-area: dot;
    margin: 0; width: 56px; height: 56px;
    align-self: center;
    font-size: 16px;
  }
  .proc-step h4 {
    grid-area: title;
    margin-bottom: 4px; font-size: 16px;
    align-self: end;
  }
  .proc-step p {
    grid-area: desc;
    font-size: 13px;
    line-height: 1.85;
    align-self: start;
  }

  /* VIII. FAQ */
  .faq-item summary { font-size: 14.5px; padding: 22px 36px 22px 0; gap: 16px; }
  .faq-item summary::after { font-size: 24px; }
  .q-mark { font-size: 18px; }
  .faq-body { padding: 0 0 26px 38px; font-size: 13px; }

  /* IX. CLOSING */
  .section-closing { padding: 110px 22px 0; }
  .closing-en { font-size: 12px; letter-spacing: 0.32em; margin-bottom: 32px; }
  .closing-jp { font-size: clamp(16px, 4.2vw, 24px); letter-spacing: 0.08em; }
  .closing-body { font-size: 13.5px; line-height: 2.0; margin-top: 30px; }
  .closing-cta { padding: 14px 30px; font-size: 12px; letter-spacing: 0.28em; }
  .closing-info { margin-top: 70px; font-size: 11px; letter-spacing: 0.24em; }
  .footer { padding: 22px 22px; font-size: 10px; }

  /* Logo image — mobile sizes */
  .nav-logo img { height: 18px; }
  .cover-title img { max-width: 78vw; }
}

/* =========================================================
   Logo image (FERTUM wordmark)
   ========================================================= */
.nav-logo {
  display: inline-flex;
  align-items: center;
  padding-left: 0;
}
.nav-logo img {
  display: block;
  height: 22px;
  width: auto;
  /* Logo source is black on transparent — invert to ivory on dark nav */
  filter: brightness(0) invert(1);
  opacity: 0.94;
  transition: opacity .3s ease;
}
.nav-logo:hover img { opacity: 1; }

.cover-title {
  /* Override text-based sizing for image logo */
  white-space: normal;
  padding-left: 0;
  letter-spacing: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}
.cover-title img {
  display: block;
  width: auto;
  max-width: min(680px, 80vw);
  height: auto;
  filter: brightness(0) invert(1);
  opacity: 0.96;
  /* Inherit fade-in from data-fade reveal */
}

.ct-head .ct-col-fertum {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}
.ct-head .ct-col-fertum img {
  display: block;
  height: 24px;
  width: auto;
  /* Light section — keep original dark logo, no invert */
}