/* =========================================================
   FUTAKO COMPANY — Production stylesheet
   ========================================================= */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: #FFFFFF;
  color: var(--pure-black);
  font-family: var(--font-japanese);
  font-size: var(--text-base);
  line-height: var(--lh-body-ja);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg { display: block; max-width: 100%; height: auto; }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

button { font: inherit; }

::selection { background: var(--sky-pale); color: var(--pure-black); }

/* ── Container ─────────────────────────────────────────── */
.fc-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}
@media (max-width: 1080px) {
  .fc-container { padding: 0 32px; }
}
@media (max-width: 768px) {
  .fc-container { padding: 0 22px; }
}

/* ── Utilities ─────────────────────────────────────────── */
.fc-label {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-light);
}
.fc-label-bar::before {
  content: "";
  display: inline-block;
  vertical-align: middle;
  width: 28px;
  height: 1px;
  background: currentColor;
  margin-right: 12px;
  opacity: 0.6;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ── Header ─────────────────────────────────────────────── */
.fc-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px) saturate(120%);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  border-bottom: 1px solid rgba(196, 196, 196, 0.28);
}
.fc-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px var(--container-pad);
  max-width: var(--container-max);
  margin: 0 auto;
  gap: 24px;
}
@media (max-width: 1080px) {
  .fc-header-inner { padding: 18px 32px; }
}

.fc-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.fc-logo-img {
  display: block;
  height: 50px;
  width: auto;
}
.fc-logo-mark {
  border: 1.5px solid var(--pure-black);
  padding: 6px 14px 7px;
  font-family: var(--font-japanese);
  font-weight: var(--fw-medium);
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--pure-black);
}
.fc-logo-tag {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-light);
}
@media (max-width: 1080px) {
  .fc-logo-tag { display: none; }
}

.fc-nav {
  display: flex;
  gap: 26px;
  align-items: center;
}
.fc-nav a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--ink-dark);
  white-space: nowrap;
  padding: 6px 0;
}
.fc-nav a .n {
  font-weight: var(--fw-regular);
  color: var(--ink-light);
  font-size: 10px;
}
.fc-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--pure-black);
  transition: right var(--transition-base);
}
.fc-nav a:hover::after,
.fc-nav a[aria-current="page"]::after {
  right: 0;
}
.fc-nav a[aria-current="page"] .n {
  color: var(--sky-dim);
}

.fc-lang {
  display: inline-flex;
  border: 1px solid var(--ink-faint);
  padding: 6px 12px;
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: var(--ls-wide);
  color: var(--ink-mid);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color var(--transition-base);
}
.fc-lang:hover { border-color: var(--ink-mid); }

/* Burger button — hidden on desktop */
.fc-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0;
}
.fc-burger i {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--pure-black);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}
.fc-burger.is-open i:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.fc-burger.is-open i:nth-child(2) { opacity: 0; transform: translateX(-8px); }
.fc-burger.is-open i:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav overlay */
.fc-mnav {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 80px 32px 48px;
  gap: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-12px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}
.fc-mnav.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.fc-mnav-list { width: 100%; max-width: 420px; }
.fc-mnav a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ink-faint);
  font-family: var(--font-heading);
  font-size: 14px;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--ink-dark);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 360ms ease-out, transform 360ms ease-out;
}
.fc-mnav.is-open a {
  opacity: 1;
  transform: translateY(0);
}
.fc-mnav.is-open a:nth-child(1) { transition-delay: 100ms; }
.fc-mnav.is-open a:nth-child(2) { transition-delay: 150ms; }
.fc-mnav.is-open a:nth-child(3) { transition-delay: 200ms; }
.fc-mnav.is-open a:nth-child(4) { transition-delay: 250ms; }
.fc-mnav.is-open a:nth-child(5) { transition-delay: 300ms; }
.fc-mnav.is-open a:nth-child(6) { transition-delay: 350ms; }
.fc-mnav.is-open a:nth-child(7) { transition-delay: 400ms; }
.fc-mnav.is-open a:nth-child(8) { transition-delay: 450ms; }
.fc-mnav a .n {
  font-weight: var(--fw-regular);
  color: var(--ink-light);
  font-size: 11px;
  min-width: 28px;
}
.fc-mnav a .ja {
  font-family: var(--font-japanese);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--ink-mid);
  margin-left: auto;
}

/* ── Meta Bar (00 / SECTION) ──────────────────────────── */
.fc-meta {
  padding: 28px var(--container-pad) 0;
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}
@media (max-width: 1080px) {
  .fc-meta { padding: 22px 32px 0; }
}
.fc-meta-left { display: flex; gap: 18px; align-items: baseline; }
.fc-meta-num {
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  color: var(--ink-light);
}
.fc-meta-mid {
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-light);
  text-transform: uppercase;
}
.fc-meta-right {
  font-family: var(--font-japanese);
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.04em;
}

/* ── Hero (TOP) ────────────────────────────────────────── */
.fc-hero { padding: 56px 0 104px; }
.fc-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 64px;
  align-items: end;
}
.fc-hero-title {
  font-family: var(--font-japanese);
  font-size: clamp(28px, 3.7vw, 48px);
  font-weight: var(--fw-bold);
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--pure-black);
  margin: 0;
  text-wrap: pretty;
}
/* Lock line 2 onto a single line at desktop / tablet widths */
.fc-hero-title .line-keep {
  display: inline-block;
  white-space: nowrap;
}
.fc-hero-title .accent {
  background-image: url("../img/common-brush-sky.png");
  background-repeat: no-repeat;
  background-position: 50% 100%;
  background-size: 110% 36%;
  padding: 0 4px 8px;
}
.fc-hero-sub {
  margin: 36px 0 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-mid);
}
.fc-hero-sub::before {
  content: "";
  display: inline-block;
  width: 36px;
  height: 1px;
  background: var(--ink-mid);
  flex-shrink: 0;
}
.fc-hero-lede {
  margin: 24px 0 0;
  font-family: var(--font-japanese);
  font-size: 16px;
  line-height: var(--lh-body-ja);
  color: var(--ink-mid);
  letter-spacing: 0.04em;
  max-width: 540px;
}
.fc-hero-scroll {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 64px;
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  color: var(--ink-light);
  text-transform: uppercase;
}
.fc-hero-scroll i {
  display: inline-block;
  width: 1px;
  height: 28px;
  background: var(--ink-light);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { opacity: 1; transform: scaleY(1); transform-origin: top; }
  50% { opacity: 0.3; transform: scaleY(0.55); }
}

figure.fc-hero-media { margin: 0; position: relative; }
.fc-hero-media img { width: 100%; height: auto; }
.fc-hero-media-caption {
  margin-top: 18px;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-light);
}
.fc-hero-media-caption .ja {
  font-family: var(--font-japanese);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--ink-mid);
}

/* ── Sub-page Hero ─────────────────────────────────────── */
.fc-page-hero {
  padding: 64px 0 80px;
  position: relative;
}
.fc-page-hero-num {
  font-family: var(--font-heading);
  font-size: 13px;
  letter-spacing: 0.4em;
  color: var(--ink-light);
  margin-bottom: 28px;
}
.fc-page-hero-num strong {
  color: var(--pure-black);
  font-weight: var(--fw-medium);
  margin-right: 14px;
}
.fc-page-hero-en {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  color: var(--pure-black);
  margin: 0 0 18px;
  line-height: 1.1;
}
.fc-page-hero-ja {
  font-family: var(--font-japanese);
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  color: var(--pure-black);
  margin: 0 0 36px;
  line-height: 1.5;
}
.fc-page-hero-lede {
  font-family: var(--font-japanese);
  font-size: 16px;
  line-height: var(--lh-body-ja);
  color: var(--ink-mid);
  letter-spacing: 0.04em;
  max-width: 640px;
}

/* ── Contents Index (TOP) ──────────────────────────────── */
.fc-contents { padding: 32px 0 104px; }
.fc-contents-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 24px;
  gap: 32px;
}
.fc-contents-title {
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mid);
  margin: 0;
  font-weight: var(--fw-medium);
}
.fc-contents-title::before {
  content: "＿＿";
  margin-right: 10px;
  color: var(--ink-faint);
  letter-spacing: 0;
}
.fc-contents-hint {
  font-family: var(--font-japanese);
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.06em;
}

.fc-index { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink-faint); }
.fc-index li { border-bottom: 1px solid var(--ink-faint); }
.fc-index a {
  display: grid;
  grid-template-columns: 84px 220px 1fr 56px;
  gap: 28px;
  padding: 30px 12px;
  align-items: center;
  transition: background var(--transition-base), padding-left var(--transition-base);
}
.fc-index a:hover {
  background: var(--sky-wash);
  padding-left: 22px;
}
.fc-index a:hover .fc-idx-arrow { transform: translateX(8px); color: var(--sky-dim); }
.fc-index a:hover .fc-idx-num { color: var(--sky-dim); }
.fc-idx-num {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
  color: var(--ink-dark);
  transition: color var(--transition-base);
}
.fc-idx-en {
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.22em;
  font-weight: var(--fw-medium);
  color: var(--ink-mid);
  text-transform: uppercase;
}
.fc-idx-ja {
  font-family: var(--font-japanese);
  font-size: 18px;
  font-weight: var(--fw-medium);
  color: var(--pure-black);
  letter-spacing: 0.04em;
}
.fc-idx-arrow {
  text-align: right;
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--ink-mid);
  transition: transform var(--transition-base), color var(--transition-base);
}

/* ── Snippet (3-col on TOP) ────────────────────────────── */
.fc-snippet {
  padding: 64px 0 96px;
  border-top: 1px solid var(--ink-faint);
}
.fc-snippet-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 64px;
}
.fc-snippet-block h4 {
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mid);
  margin: 0 0 22px;
  font-weight: var(--fw-medium);
}
.fc-snippet-block h4::before {
  content: "＿＿";
  margin-right: 10px;
  color: var(--ink-faint);
  letter-spacing: 0;
}

/* News list (shared component) */
.fc-news-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink-faint); }
.fc-news-list li { border-bottom: 1px solid var(--ink-faint); }
.fc-news-list a {
  display: grid;
  grid-template-columns: 100px 80px 1fr;
  gap: 18px;
  padding: 18px 4px;
  align-items: baseline;
  transition: opacity var(--transition-base);
}
.fc-news-list a:hover { opacity: 0.6; }
.fc-news-date {
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-light);
}
.fc-news-cat {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sky-dim);
}
.fc-news-title {
  font-family: var(--font-japanese);
  font-size: 13px;
  color: var(--ink-dark);
  letter-spacing: 0.04em;
}

.fc-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-mid);
  border-bottom: 1px solid var(--ink-faint);
  padding-bottom: 4px;
  transition: color var(--transition-base), border-color var(--transition-base);
}
.fc-more:hover { color: var(--sky-dim); border-color: var(--sky-dim); }
.fc-more::after { content: "→"; transition: transform var(--transition-base); }
.fc-more:hover::after { transform: translateX(4px); }

/* Project card */
.fc-project {
  background: var(--surface-card);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.fc-project:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.fc-project-img {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--surface-soft);
}
.fc-project-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 42%;
  transition: transform 500ms ease-out;
}
.fc-project:hover .fc-project-img img { transform: scale(1.04); }
.fc-project-body { padding: 26px 28px 30px; }
.fc-project-pill {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--gold-dim);
  color: var(--gold-dim);
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.fc-project-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: var(--fw-medium);
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  color: var(--pure-black);
}
.fc-project-name-ja {
  font-family: var(--font-japanese);
  font-size: 13px;
  color: var(--ink-mid);
  margin: 0 0 16px;
  letter-spacing: 0.04em;
}
.fc-project-desc {
  font-family: var(--font-japanese);
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-mid);
  margin: 0 0 22px;
  letter-spacing: 0.03em;
}
.fc-project-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--gold-dim);
  border-bottom: 1px solid var(--gold-dim);
  padding-bottom: 4px;
  transition: color var(--transition-base), border-color var(--transition-base);
}
.fc-project-link:hover { color: var(--ink-dark); border-color: var(--ink-dark); }

/* Partner map */
.fc-map {
  background: #FFFFFF;
  border: 1px solid var(--sky-pale);
  aspect-ratio: 4/3;
  overflow: hidden;
}
.fc-map svg,
.fc-map iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
}
.fc-map-list {
  margin-top: 18px;
  list-style: none;
  padding: 0;
  font-family: var(--font-japanese);
  font-size: 12px;
  color: var(--ink-mid);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}
.fc-map-list li::before {
  content: "・";
  color: var(--gold-dim);
  margin-right: 2px;
}
.fc-map-caption {
  margin: 18px 0 0;
  font-family: var(--font-japanese);
  font-size: 12px;
  line-height: 1.85;
  color: var(--ink-mid);
  letter-spacing: 0.04em;
}

/* ── Section frame (sub-pages) ─────────────────────────── */
.fc-section {
  padding: 80px 0;
  border-top: 1px solid var(--ink-faint);
}
.fc-section--soft {
  background: var(--surface-soft);
  border-top: none;
}
.fc-section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 16px;
}
.fc-section-eyebrow {
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mid);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.fc-section-eyebrow::before {
  content: ""; width: 32px; height: 1px;
  background: var(--ink-mid);
}
.fc-section-title {
  font-family: var(--font-japanese);
  font-size: clamp(24px, 2.8vw, 34px);
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  margin: 16px 0 0;
  line-height: 1.5;
}
.fc-section-en {
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ink-light);
  text-transform: uppercase;
}
.fc-prose {
  font-family: var(--font-japanese);
  font-size: 16px;
  line-height: 2.05;
  color: var(--ink-dark);
  letter-spacing: 0.04em;
  max-width: 720px;
}
.fc-prose p + p { margin-top: 1.4em; }

/* Two-col text + image */
.fc-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.fc-split--reverse > :first-child { order: 2; }
.fc-split img,
.fc-split .fc-figure {
  width: 100%;
}

/* Figure with caption */
.fc-figure {
  margin: 0;
  display: block;
}
.fc-figure img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: var(--surface-soft);
}
.fc-figure figcaption {
  margin-top: 14px;
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-light);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
/* Wide diagrams / infographics — show full image without cropping */
.fc-figure--fit img {
  aspect-ratio: auto;
  object-fit: contain;
  height: auto;
}

.fc-figure figcaption .ja {
  font-family: var(--font-japanese);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--ink-mid);
}

/* ── Voice cards (CASE STUDY) ──────────────────────────── */
.fc-voice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.fc-voice {
  background: var(--surface-card);
  border: 1px solid var(--ink-faint);
  padding: 28px 26px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color var(--transition-base), transform var(--transition-base);
}
.fc-voice:hover { border-color: var(--sky-dim); transform: translateY(-2px); }
.fc-voice-tag {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sky-dim);
}
.fc-voice-body {
  font-family: var(--font-japanese);
  font-size: 14px;
  line-height: 1.95;
  color: var(--ink-dark);
  letter-spacing: 0.03em;
  flex-grow: 1;
}
.fc-voice-body::before {
  content: "“";
  font-family: var(--font-body-serif);
  font-size: 36px;
  color: var(--gold-dim);
  display: block;
  line-height: 0.5;
  margin-bottom: 8px;
}
.fc-voice-by {
  font-family: var(--font-japanese);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-light);
  padding-top: 12px;
  border-top: 1px solid var(--ink-faint);
}

/* ── Process flow (CASE STUDY / TRB) ───────────────────── */
.fc-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  counter-reset: step;
}
.fc-flow li {
  position: relative;
  padding: 22px 18px 24px;
  border: 1px solid var(--ink-faint);
  margin-left: -1px;
  background: #FFFFFF;
  counter-increment: step;
}
.fc-flow li:first-child { margin-left: 0; }
.fc-flow li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gold-dim);
  margin-bottom: 8px;
}
.fc-flow .ja {
  font-family: var(--font-japanese);
  font-weight: var(--fw-medium);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--ink-dark);
  margin-bottom: 4px;
}
.fc-flow .en {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-light);
}

/* ── Item list (research / next-gen / company) ─────────── */
.fc-itemlist {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink-faint);
}
.fc-itemlist li {
  border-bottom: 1px solid var(--ink-faint);
  padding: 24px 4px;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  align-items: baseline;
}
.fc-itemlist .label {
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-light);
}
.fc-itemlist .value {
  font-family: var(--font-japanese);
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-dark);
  letter-spacing: 0.04em;
}

/* ── Card grid (research / next-gen) ───────────────────── */
.fc-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.fc-card {
  background: #FFFFFF;
  border: 1px solid var(--ink-faint);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base);
}
.fc-card:hover { border-color: var(--gold-dim); transform: translateY(-2px); }
.fc-card-img {
  aspect-ratio: 4/3;
  background: var(--surface-soft);
  overflow: hidden;
}
.fc-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 500ms ease-out;
}
.fc-card:hover .fc-card-img img { transform: scale(1.03); }
.fc-card-body {
  padding: 22px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-grow: 1;
}
.fc-card-tag {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sky-dim);
}
.fc-card-title {
  font-family: var(--font-japanese);
  font-size: 16px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
  color: var(--pure-black);
  margin: 0;
  line-height: 1.55;
}
.fc-card-desc {
  font-family: var(--font-japanese);
  font-size: 12px;
  line-height: 1.85;
  color: var(--ink-mid);
  margin: 0;
}

/* ── Form (CONTACT) ────────────────────────────────────── */
.fc-form {
  display: grid;
  gap: 24px;
  max-width: 720px;
}
.fc-form-row { display: flex; flex-direction: column; gap: 8px; }
.fc-form-row label {
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mid);
}
.fc-form-row label .req {
  color: var(--gold-dim);
  margin-left: 6px;
  font-size: 10px;
  letter-spacing: 0;
}
.fc-form input[type="text"],
.fc-form input[type="email"],
.fc-form input[type="tel"],
.fc-form select,
.fc-form textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-japanese);
  font-size: 15px;
  color: var(--ink-dark);
  background: #FFFFFF;
  border: 1px solid var(--ink-faint);
  border-radius: 0;
  transition: border-color var(--transition-base);
  -webkit-appearance: none;
  appearance: none;
}
.fc-form input:focus,
.fc-form select:focus,
.fc-form textarea:focus {
  outline: none;
  border-color: var(--sky-dim);
}
.fc-form textarea { min-height: 180px; resize: vertical; line-height: 1.85; }
.fc-form select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' stroke='%23181818' fill='none' stroke-width='1.5'/></svg>");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 12px;
  padding-right: 40px;
}
.fc-form-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px 36px;
  background: var(--pure-black);
  color: var(--washi-white);
  border: 1px solid var(--pure-black);
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
  align-self: flex-start;
  justify-self: flex-start;
  min-width: 220px;
}
.fc-form-submit:hover { background: #FFFFFF; color: var(--pure-black); }

/* ── Signature ─────────────────────────────────────────── */
.fc-signature {
  padding: 112px 0 96px;
  background:
    radial-gradient(120% 60% at 50% 0%, rgba(123,191,216,0.06) 0%, transparent 60%),
    #FFFFFF;
  text-align: center;
  border-top: 1px solid var(--ink-faint);
  position: relative;
  overflow: hidden;
}
.fc-signature::before {
  content: "";
  position: absolute;
  top: 60px;
  left: 50%;
  transform: translateX(-50%);
  width: 220px;
  height: 80px;
  background-image: url("../img/common-brush-gold.png");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.32;
  pointer-events: none;
}
.fc-sig-mark {
  position: relative;
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 32px;
}
.fc-sig-title {
  position: relative;
  margin: 0;
  font-family: var(--font-japanese);
  /* clamp keeps signature on a single line down to 320px viewport */
  font-size: clamp(18px, 5vw, 60px);
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: var(--pure-black);
  white-space: nowrap;
}

/* ── Sub-page footer link group ───────────────────────── */
.fc-nextprev {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--ink-faint);
  border-bottom: 1px solid var(--ink-faint);
}
.fc-nextprev a {
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background var(--transition-base);
}
.fc-nextprev a:first-child { border-right: 1px solid var(--ink-faint); }
.fc-nextprev a:hover { background: var(--sky-wash); }
.fc-nextprev .dir {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-light);
}
.fc-nextprev .label {
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mid);
}
.fc-nextprev .ja {
  font-family: var(--font-japanese);
  font-size: 18px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
  color: var(--pure-black);
  margin-top: 4px;
}
.fc-nextprev a:last-child {
  text-align: right;
  align-items: flex-end;
}

/* ── Footer ────────────────────────────────────────────── */
.fc-footer {
  background: var(--surface-inv);
  color: var(--washi-white);
  padding: 88px 0 32px;
}
.fc-footer .fc-container { max-width: var(--container-max); }

.fc-quick {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(250, 243, 223, 0.1);
  border: 1px solid rgba(250, 243, 223, 0.1);
  margin-bottom: 72px;
}
.fc-quick-item {
  background: var(--surface-inv);
  padding: 28px 22px;
  display: flex;
  align-items: center;
  gap: 18px;
  transition: background var(--transition-base);
}
.fc-quick-item:hover { background: #25221c; }
.fc-quick-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fc-quick-icon img {
  width: 100%; height: 100%;
  object-fit: contain;
  filter: invert(1) brightness(0.95);
}
.fc-quick-icon.is-line img { filter: none; }
.fc-quick-meta { display: flex; flex-direction: column; gap: 4px; }
.fc-quick-label {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(250, 243, 223, 0.55);
}
.fc-quick-value {
  font-family: var(--font-heading);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--washi-white);
}

.fc-foot-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 56px;
  padding-top: 8px;
}
.fc-foot-brand .fc-logo-mark {
  border-color: var(--washi-white);
  color: var(--washi-white);
}
.fc-foot-logo-img {
  display: block;
  height: 72px;
  width: auto;
}
.fc-foot-brand .company {
  margin-top: 22px;
  font-family: var(--font-japanese);
  font-size: 13px;
  line-height: 2;
  color: rgba(250, 243, 223, 0.7);
  letter-spacing: 0.04em;
}
.fc-foot-col h5 {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(250, 243, 223, 0.4);
  margin: 0 0 18px;
  font-weight: var(--fw-medium);
}
.fc-foot-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.fc-foot-col li a {
  font-family: var(--font-japanese);
  font-size: 13px;
  color: rgba(250, 243, 223, 0.8);
  letter-spacing: 0.04em;
}
.fc-foot-col li a:hover { color: var(--sky-bright); }
.fc-foot-col li a .en {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(250, 243, 223, 0.35);
  margin-right: 10px;
}
.fc-foot-base {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid rgba(250, 243, 223, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(250, 243, 223, 0.4);
}
.fc-foot-base .ja {
  font-family: var(--font-japanese);
  font-size: 9.5px;
  letter-spacing: 0.08em;
}

/* =========================================================
   SCROLL ANIMATIONS — fade-in-up
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 720ms cubic-bezier(0.22, 0.61, 0.36, 1),
    transform 720ms cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1080px) {
  .fc-nav { gap: 18px; }
  .fc-nav a { font-size: 10px; letter-spacing: 0.1em; }
  .fc-hero-grid { gap: 48px; }
  .fc-snippet-grid { gap: 40px; }
  .fc-foot-grid { gap: 36px; grid-template-columns: 1fr 1fr; }
  .fc-quick { grid-template-columns: 1fr 1fr; }
  .fc-voice-grid { grid-template-columns: 1fr 1fr; }
  .fc-cards { grid-template-columns: 1fr 1fr; }
  .fc-flow { grid-template-columns: repeat(3, 1fr); }
  .fc-split { gap: 48px; }
}

@media (max-width: 768px) {
  :root { --container-pad: 22px; }

  .fc-header-inner { padding: 14px 22px; }
  .fc-logo-tag { display: none; }
  .fc-nav { display: none; }
  .fc-lang { display: none; }
  .fc-burger { display: flex; }

  .fc-meta {
    padding: 18px 22px 0;
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
  }
  .fc-meta-mid, .fc-meta-right { font-size: 10px; }

  /* TOP hero */
  .fc-hero { padding: 28px 0 56px; }
  .fc-hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .fc-hero-title {
    font-size: clamp(22px, 6.4vw, 30px);
    line-height: 1.55;
    letter-spacing: 0.03em;
  }
  .fc-hero-sub { font-size: 10px; margin-top: 24px; }
  .fc-hero-sub::before { width: 24px; }
  .fc-hero-lede { font-size: 13px; }
  .fc-hero-scroll { margin-top: 32px; }

  .fc-logo-img { height: 42px; }
  .fc-foot-logo-img { height: 60px; }

  /* Sub-page hero */
  .fc-page-hero { padding: 40px 0 56px; }
  .fc-page-hero-num { font-size: 11px; margin-bottom: 22px; }
  .fc-page-hero-ja { font-size: 24px; margin-bottom: 24px; }
  .fc-page-hero-lede { font-size: 14px; }

  /* Contents index */
  .fc-contents { padding: 16px 0 56px; }
  .fc-contents-header { flex-direction: column; gap: 6px; align-items: flex-start; }
  .fc-contents-hint { font-size: 11px; }
  .fc-index a {
    grid-template-columns: 38px 1fr 20px;
    gap: 12px;
    row-gap: 4px;
    padding: 18px 4px;
  }
  .fc-idx-num { grid-column: 1; grid-row: 1 / span 2; align-self: center; font-size: 16px; }
  .fc-idx-en  { grid-column: 2; grid-row: 1; font-size: 10px; letter-spacing: 0.2em; }
  .fc-idx-ja  { grid-column: 2; grid-row: 2; font-size: 14px; letter-spacing: 0.03em; }
  .fc-idx-arrow { grid-column: 3; grid-row: 1 / span 2; align-self: center; font-size: 14px; }
  .fc-index a:hover { padding-left: 4px; } /* no slide on mobile */

  /* Snippet / sections */
  .fc-snippet { padding: 40px 0 56px; }
  .fc-snippet-grid { grid-template-columns: 1fr; gap: 40px; }
  .fc-section { padding: 56px 0; }
  .fc-section-head { margin-bottom: 28px; }
  .fc-prose { font-size: 14px; line-height: 2; }
  .fc-split { grid-template-columns: 1fr; gap: 32px; }
  .fc-split--reverse > :first-child { order: 0; }

  /* Voice / cards / flow / itemlist */
  .fc-voice-grid { grid-template-columns: 1fr; gap: 16px; }
  .fc-cards { grid-template-columns: 1fr; gap: 18px; }
  .fc-flow { grid-template-columns: 1fr 1fr; }
  .fc-flow li { padding: 16px 14px 18px; }
  .fc-itemlist li { grid-template-columns: 1fr; gap: 8px; padding: 18px 4px; }

  /* News list */
  .fc-news-list a { grid-template-columns: auto auto 1fr; gap: 12px; padding: 14px 4px; }
  .fc-news-title { font-size: 12px; }
  .fc-news-date, .fc-news-cat { font-size: 10px; }

  /* Project card */
  .fc-project-body { padding: 20px 22px 24px; }
  .fc-project-name { font-size: 18px; }
  .fc-project-desc { font-size: 12px; }

  /* Signature */
  .fc-signature { padding: 64px 0 56px; }
  .fc-signature::before { width: 160px; height: 60px; top: 36px; }
  .fc-sig-mark { font-size: 10px; margin-bottom: 20px; }
  /* sig-title: clamp() in base rule handles all widths; keep nowrap behaviour */

  /* Next/prev */
  .fc-nextprev { grid-template-columns: 1fr; }
  .fc-nextprev a:first-child { border-right: none; border-bottom: 1px solid var(--ink-faint); }
  .fc-nextprev a:last-child { text-align: left; align-items: flex-start; }
  .fc-nextprev .ja { font-size: 16px; }

  /* Footer */
  .fc-footer { padding: 56px 0 28px; }
  .fc-quick { grid-template-columns: 1fr; margin-bottom: 40px; }
  .fc-quick-item { padding: 18px; }
  .fc-quick-icon { width: 32px; height: 32px; }
  .fc-quick-value { font-size: 13px; }
  .fc-foot-grid { grid-template-columns: 1fr; gap: 32px; }
  .fc-foot-col h5 { font-size: 10px; }
  .fc-foot-col li a { font-size: 12px; }
  .fc-foot-base { flex-direction: column; gap: 10px; align-items: flex-start; font-size: 10px; text-align: left; }

  /* Form */
  .fc-form-submit { width: 100%; }
}

/* Very narrow screens — allow hero line to wrap naturally */
@media (max-width: 360px) {
  .fc-hero-title .line-keep { white-space: normal; }
  .fc-foot-base .ja { font-size: 9px; }
}