/* ============================================================
   869 International — brand.869biz.com
   侘び寂び × 質実剛健 (wabi-sabi × Swiss rigour)
   ============================================================ */

:root {
  /* ink — ロゴの墨紺 */
  --ink-900: #0c0f18;
  --ink-800: #11151f;
  --ink-700: #161b29;
  --ink-line: rgba(242, 237, 227, 0.14);

  /* washi — 和紙・生成り */
  --washi-50: #f4f0e6;
  --washi-100: #ece7db;
  --washi-200: #e2dccc;
  --washi-line: rgba(19, 23, 38, 0.14);

  /* metal */
  --gold: #b08d57;
  --gold-soft: #c5a878;
  --silver: #9aa0a8;

  --text-on-ink: #ece8dd;
  --text-on-ink-muted: #9d9a90;
  --text-on-washi: #1d2230;
  --text-on-washi-muted: #5d5a50;

  --serif-ja: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  --serif-en: "Cormorant Garamond", Georgia, serif;
  --sans: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--text-on-ink);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 2;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--gold); color: var(--ink-900); }

/* ---------- registered trademark ---------- */
.brand-logo-wrap {
  position: relative;
  display: inline-block;
  line-height: 0;
}
.brand-logo-wrap .brand-reg {
  position: absolute;
  top: auto;
  bottom: 0;
  right: -0.45em;
  font-size: 0.36em;
  font-family: var(--serif-en);
  line-height: 1;
  font-weight: 400;
  opacity: 0.88;
  pointer-events: none;
}
.brand-name {
  position: relative;
  display: inline-block;
  padding-right: 0.55em;
}
.brand-name .brand-reg {
  position: absolute;
  bottom: 0.08em;
  right: 0;
  font-size: 0.42em;
  line-height: 1;
  font-family: var(--serif-en);
  font-weight: 400;
  opacity: 0.9;
}

/* ---------- veil (loading) ---------- */
.veil {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: var(--ink-900);
  transition: opacity 0.9s var(--ease-out), visibility 0.9s;
}
.veil__mark {
  width: 72px;
  height: auto;
  opacity: 0;
  animation: veilMark 1.2s var(--ease-out) forwards;
}
.veil.is-done { opacity: 0; visibility: hidden; }
@keyframes veilMark {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 0.9; transform: scale(1); }
}

/* ---------- header ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 48px);
  transition: background 0.5s, backdrop-filter 0.5s, border-color 0.5s;
  border-bottom: 1px solid transparent;
}
.header.is-scrolled {
  background: rgba(12, 15, 24, 0.82);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--ink-line);
}
.header__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.header__mark-wrap .header__mark { width: 30px; height: auto; }
.header__name {
  font-family: var(--serif-en);
  font-size: 1.05rem;
  letter-spacing: 0.18em;
  font-weight: 500;
}
.header__nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.6vw, 34px);
}
.header__nav a {
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-decoration: none;
  opacity: 0.78;
  transition: opacity 0.3s;
}
.header__nav a:hover { opacity: 1; }
.header__cta {
  padding: 9px 22px;
  border: 1px solid var(--ink-line);
  border-radius: 999px;
  transition: border-color 0.3s, color 0.3s, opacity 0.3s;
}
.header__cta:hover { border-color: var(--gold); color: var(--gold-soft); }

.header__burger {
  display: none;
  flex-direction: column;
  gap: 7px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.header__burger span {
  width: 26px; height: 1px;
  background: var(--text-on-ink);
  transition: transform 0.4s var(--ease-out), opacity 0.3s;
}
.header__burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.header__burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-content: center;
  gap: 8px;
  background: rgba(12, 15, 24, 0.96);
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.45s, visibility 0.45s;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu a {
  font-family: var(--serif-ja);
  font-size: 1.6rem;
  text-decoration: none;
  padding: 10px 0;
  text-align: center;
}
.mobile-menu a small {
  display: block;
  font-family: var(--serif-en);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
}

/* ---------- shared section bits ---------- */
section { position: relative; }
.section--washi {
  background:
    radial-gradient(ellipse 120% 60% at 50% 0%, rgba(255, 255, 255, 0.5), transparent 60%),
    var(--washi-100);
  color: var(--text-on-washi);
}
.section--ink {
  background: var(--ink-900);
  color: var(--text-on-ink);
}

.section-head { margin-bottom: clamp(40px, 7vh, 80px); }
.section-head__en {
  margin: 0 0 10px;
  font-family: var(--serif-en);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: var(--gold);
}
.section-head__ja {
  margin: 0;
  font-family: var(--serif-ja);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1.5;
}
.section-head__note {
  margin: 14px 0 0;
  font-size: 0.85rem;
  color: var(--text-on-ink-muted);
  letter-spacing: 0.1em;
}
.section--washi .section-head__note { color: var(--text-on-washi-muted); }

/* ---------- reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
}
.reveal.is-in { opacity: 1; transform: none; }
.d1 { transition-delay: 0.1s; }
.d2 { transition-delay: 0.25s; }
.d3 { transition-delay: 0.4s; }
.d4 { transition-delay: 0.55s; }
.d5 { transition-delay: 0.8s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .veil { display: none; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100svh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: calc(var(--header-h) + 4vh) clamp(20px, 6vw, 80px) 12vh;
}
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.hero__photo {
  position: absolute;
  right: 0;
  top: -10%;
  height: 118%;
  width: min(58vw, 760px);
  object-fit: cover;
  object-position: center 18%;
  opacity: 0.85;
  will-change: transform;
  -webkit-mask-image: linear-gradient(100deg, transparent 2%, #000 45%);
          mask-image: linear-gradient(100deg, transparent 2%, #000 45%);
}
.hero__scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(12, 15, 24, 0.25), transparent 30%, transparent 70%, var(--ink-900) 100%),
    linear-gradient(90deg, var(--ink-900) 28%, transparent 75%);
}
.hero__vertical {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: clamp(14px, 3vw, 40px);
  transform: translateY(-50%);
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--serif-ja);
  font-size: 0.8rem;
  letter-spacing: 0.55em;
  color: rgba(236, 232, 221, 0.55);
}
.hero__content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}
.hero__mark-wrap { margin-bottom: 4vh; }
.hero__mark-wrap .hero__mark { width: clamp(64px, 8vw, 96px); height: auto; }
.hero__title {
  margin: 0 0 3.5vh;
  font-family: var(--serif-ja);
  font-weight: 500;
  font-size: clamp(2.1rem, 5.6vw, 4rem);
  line-height: 1.6;
  letter-spacing: 0.08em;
}
.hero__title span { display: block; }
.hero__sub {
  margin: 0 0 2.5vh;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  letter-spacing: 0.06em;
  color: var(--gold-soft);
}
.hero__lead {
  margin: 0;
  font-size: clamp(0.92rem, 1.3vw, 1.05rem);
  color: var(--text-on-ink-muted);
}
.hero__scroll {
  position: absolute;
  z-index: 2;
  left: clamp(20px, 6vw, 80px);
  bottom: 4vh;
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}
.hero__scroll-line {
  width: 56px;
  height: 1px;
  background: var(--text-on-ink-muted);
  transform-origin: left;
  animation: scrollPulse 2.4s var(--ease-out) infinite;
}
.hero__scroll-text {
  font-family: var(--serif-en);
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--text-on-ink-muted);
}
@keyframes scrollPulse {
  0% { transform: scaleX(0); }
  55% { transform: scaleX(1); }
  100% { transform: scaleX(0); transform-origin: right; }
}

/* ============================================================
   PHILOSOPHY
   ============================================================ */
.philosophy { padding: clamp(80px, 14vh, 150px) clamp(20px, 6vw, 80px); }
.philosophy__grid {
  display: grid;
  grid-template-columns: auto 1fr minmax(280px, 420px);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  max-width: 1200px;
}
.philosophy__vertical {
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--serif-ja);
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  letter-spacing: 0.4em;
  line-height: 2.4;
  color: var(--gold);
  border-right: 1px solid var(--washi-line);
  padding-right: clamp(16px, 2vw, 28px);
  min-height: 280px;
}
.philosophy__text {
  max-width: 34em;
  font-size: 0.98rem;
}
.philosophy__text p { margin: 0 0 2em; }
.philosophy__text em {
  font-style: normal;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
}
.philosophy__figure { margin: 0; }
.philosophy__figure img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: saturate(0.92);
}
.philosophy__figure figcaption {
  margin-top: 12px;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--text-on-washi-muted);
}

.creed {
  list-style: none;
  margin: clamp(60px, 10vh, 110px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 4vw, 56px);
  max-width: 1200px;
}
.creed li {
  border-top: 1px solid var(--washi-line);
  padding-top: 26px;
}
.creed__num {
  font-family: var(--serif-ja);
  font-size: 0.9rem;
  color: var(--gold);
  letter-spacing: 0.3em;
}
.creed h3 {
  margin: 14px 0 12px;
  font-family: var(--serif-ja);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.12em;
}
.creed p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-on-washi-muted);
}

/* ============================================================
   COLLECTION
   ============================================================ */
.collection { padding: clamp(80px, 14vh, 150px) clamp(20px, 6vw, 80px); }
.section-head--light .section-head__ja { color: var(--text-on-ink); }

.gallery {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(14px, 2vw, 26px);
  max-width: 1280px;
}
.gallery__item {
  position: relative;
  margin: 0;
  overflow: hidden;
  grid-column: span 4;
  background: var(--ink-800);
}
.gallery__item--tall { grid-row: span 2; }
.gallery__item--wide { grid-column: span 8; }
.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.4s var(--ease-out), filter 1.4s var(--ease-out);
  filter: saturate(0.95);
}
.gallery__item:hover img { transform: scale(1.045); filter: saturate(1.05); }
.gallery__item figcaption {
  position: absolute;
  inset: auto 0 0;
  padding: 26px 18px 14px;
  background: linear-gradient(transparent, rgba(12, 15, 24, 0.82));
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s, transform 0.5s var(--ease-out);
}
.gallery__item:hover figcaption,
.gallery__item:focus-within figcaption { opacity: 1; transform: none; }
.gallery__item figcaption span {
  font-family: var(--serif-en);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
}
.gallery__item figcaption small {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--gold-soft);
  text-align: right;
}
.collection__note {
  margin: clamp(36px, 6vh, 60px) 0 0;
  font-size: 0.88rem;
  color: var(--text-on-ink-muted);
}
.collection__note a { color: var(--gold-soft); }

/* ============================================================
   ATELIER
   ============================================================ */
.atelier { padding: clamp(80px, 14vh, 150px) clamp(20px, 6vw, 80px); }
.atelier__grid {
  display: grid;
  grid-template-columns: minmax(300px, 480px) 1fr;
  gap: clamp(32px, 6vw, 90px);
  align-items: center;
  max-width: 1200px;
}
.atelier__figure { margin: 0; position: relative; }
.atelier__figure::after {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 1px solid var(--washi-line);
  z-index: -1;
}
.atelier__figure img { filter: saturate(0.9) contrast(1.02); }
.atelier__text { max-width: 36em; font-size: 0.98rem; }
.atelier__text p { margin: 0 0 1.8em; }
.atelier__text strong { font-weight: 500; border-bottom: 1px solid var(--gold); }
.atelier__facts {
  margin: 2.4em 0 0;
  border-top: 1px solid var(--washi-line);
}
.atelier__facts > div {
  display: grid;
  grid-template-columns: 7em 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--washi-line);
  font-size: 0.88rem;
}
.atelier__facts dt { color: var(--text-on-washi-muted); letter-spacing: 0.14em; }
.atelier__facts dd { margin: 0; }

/* ============================================================
   CRAFT
   ============================================================ */
.craft {
  overflow: hidden;
  padding: clamp(100px, 18vh, 190px) clamp(20px, 6vw, 80px);
}
.craft__bg { position: absolute; inset: 0; }
.craft__bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 70% center;
  opacity: 0.5;
}
.craft__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(12, 15, 24, 0.94) 30%, rgba(12, 15, 24, 0.55));
}
.craft__content { position: relative; max-width: 640px; }
.craft__lead { margin: 0 0 3em; font-size: 1rem; }
.craft__lead em {
  font-style: normal;
  color: var(--gold-soft);
}
.craft__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: clamp(28px, 5vw, 64px);
}
.craft__stats li { display: grid; gap: 4px; }
.craft__stats strong {
  font-family: var(--serif-en);
  font-weight: 400;
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  line-height: 1;
  color: var(--gold-soft);
}
.craft__stats span {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--text-on-ink-muted);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact { padding: clamp(80px, 14vh, 150px) clamp(20px, 6vw, 80px); }
.contact__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(36px, 6vw, 90px);
  max-width: 1100px;
  align-items: start;
}
.contact__main p { margin: 0 0 2em; max-width: 30em; font-size: 0.98rem; }
.contact__mail {
  display: inline-block;
  font-family: var(--serif-en);
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  letter-spacing: 0.06em;
  color: var(--text-on-washi);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 6px;
  transition: color 0.3s, border-color 0.3s;
}
.contact__mail:hover { color: var(--gold); }
.contact__company {
  margin: 0;
  border-top: 1px solid var(--washi-line);
}
.contact__company > div {
  display: grid;
  grid-template-columns: 7em 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--washi-line);
  font-size: 0.9rem;
}
.contact__company dt { color: var(--text-on-washi-muted); letter-spacing: 0.14em; }
.contact__company dd { margin: 0; }
.contact__business {
  margin: 0;
  padding-left: 1.2em;
  line-height: 1.75;
}
.contact__business li { margin-bottom: 0.35em; }
.contact__business li:last-child { margin-bottom: 0; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--ink-900);
  color: var(--text-on-ink);
  text-align: center;
  padding: clamp(64px, 10vh, 110px) 24px 48px;
  border-top: 1px solid var(--ink-line);
}
.footer__mark-wrap { margin: 0 auto 18px; }
.footer__mark-wrap .footer__mark { width: 40px; height: auto; opacity: 0.9; }
.footer__brand {
  margin: 0;
  font-family: var(--serif-en);
  font-size: 1.15rem;
  letter-spacing: 0.3em;
}
.footer__tagline {
  margin: 8px 0 0;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--text-on-ink-muted);
}
.footer__nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin: 34px 0;
}
.footer__nav a {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.3s;
}
.footer__nav a:hover { opacity: 1; }
.footer__legal {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--text-on-ink-muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
  .philosophy__grid { grid-template-columns: auto 1fr; }
  .philosophy__figure { grid-column: 1 / -1; max-width: 460px; }
  .creed { grid-template-columns: 1fr; gap: 0; }
  .creed li { padding: 24px 0; }
  .atelier__grid { grid-template-columns: 1fr; }
  .atelier__figure { max-width: 480px; }
  .contact__grid { grid-template-columns: 1fr; }
  .gallery__item { grid-column: span 6; }
  .gallery__item--wide { grid-column: span 12; }
}

@media (max-width: 680px) {
  .header__nav { display: none; }
  .header__burger { display: flex; }
  .hero__photo {
    top: -6%;
    height: 112%;
    width: 100vw;
    object-position: center 12%;
    opacity: 0.38;
    -webkit-mask-image: linear-gradient(180deg, transparent, #000 30%);
            mask-image: linear-gradient(180deg, transparent, #000 30%);
  }
  .hero__vertical { display: none; }
  .philosophy__grid { grid-template-columns: 1fr; }
  .philosophy__vertical {
    writing-mode: horizontal-tb;
    border-right: 0;
    border-bottom: 1px solid var(--washi-line);
    padding: 0 0 16px;
    min-height: 0;
  }
  .gallery { grid-template-columns: 1fr 1fr; gap: 10px; }
  .gallery__item,
  .gallery__item--wide { grid-column: span 2; }
  .gallery__item--tall { grid-row: span 1; }
  .gallery__item figcaption { opacity: 1; transform: none; }
  .craft__stats { flex-wrap: wrap; }
}