/* =========================================================
   sou. brand site stylesheet
   ========================================================= */

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

:root {
  --ivory: #F6F1EA;
  --cream: #EDE6DB;
  --stone: #D5CAB9;
  --taupe: #9B9085;
  --brown: #5C5248;
  --dark:  #302C29;
  --white: #FDFAF6;

  --ease: cubic-bezier(.2,.6,.2,1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--ivory);
  color: var(--dark);
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 300;
  font-size: 14px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  overflow-x: hidden;
  position: relative;
}

/* grain texture overlay — fine SVG noise */
body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 200;
  opacity: .35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.18 0 0 0 0 0.16 0 0 0 0 0.14 0 0 0 0.08 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

img { max-width: 100%; height: auto; display: block; }
a   { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

/* =========================================================
   NAV
   ========================================================= */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px 48px;
  transition: background .4s var(--ease), backdrop-filter .4s var(--ease), padding .4s var(--ease);
}
nav.scrolled {
  background: rgba(246,241,234,.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 18px 48px;
}
.nav-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 22px; font-weight: 300; letter-spacing: .12em;
  color: var(--dark); text-decoration: none;
}
.nav-links { display: flex; gap: 36px; list-style: none; }
.nav-links a {
  font-size: 11px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--taupe); text-decoration: none; transition: color .3s;
}
.nav-links a:hover { color: var(--dark); }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  min-height: 100svh;
  display: grid; grid-template-columns: 1fr 1fr;
  overflow: hidden;
  position: relative;
}
.hero-left {
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 140px 64px 80px;
  animation: fadeUp 1.2s var(--ease) .2s both;
}
.hero-eyebrow {
  font-size: 10px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--taupe); margin-bottom: 28px;
}
.hero-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(80px, 10vw, 120px);
  font-weight: 300; line-height: .9; letter-spacing: -.02em;
  color: var(--dark); margin-bottom: 20px;
}
.hero-tagline-jp {
  font-family: 'Noto Serif JP', serif;
  font-size: 14px; color: var(--brown);
  letter-spacing: .12em; margin-bottom: 6px;
}
.hero-tagline-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: 13px; font-style: italic;
  color: var(--taupe); letter-spacing: .2em; margin-bottom: 52px;
}
.hero-cta {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: 11px; letter-spacing: .25em; text-transform: uppercase;
  color: var(--dark); text-decoration: none;
  transition: gap .3s var(--ease);
}
.hero-cta::after {
  content: ''; display: block; width: 36px; height: 1px;
  background: var(--dark); transition: width .3s var(--ease);
}
.hero-cta:hover { gap: 22px; }
.hero-cta:hover::after { width: 52px; }

.hero-right {
  background: var(--cream);
  position: relative; overflow: hidden;
  animation: fadeIn 1.6s var(--ease) .5s both;
}
.hero-botanical {
  position: absolute; right: -10px; bottom: 40px;
  width: 260px; opacity: .14;
}
.hero-caption {
  position: absolute; bottom: 32px; left: 32px;
  font-family: 'Cormorant Garamond', serif; font-style: italic;
  font-size: 12px; letter-spacing: .2em; color: var(--taupe);
}
.hero-circle-1 {
  position: absolute; top: 30%; left: 35%;
  width: 200px; height: 200px; border-radius: 50%;
  background: var(--stone); opacity: .25;
}
.hero-circle-2 {
  position: absolute; top: 25%; left: 30%;
  width: 240px; height: 240px; border-radius: 50%;
  border: 1px solid var(--stone); opacity: .3;
}
.hero-scroll {
  position: absolute; bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: fadeIn 2s var(--ease) 1.5s both;
  z-index: 2;
}
.hero-scroll span {
  font-size: 9px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--taupe);
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--taupe), transparent);
  animation: scrollPulse 2.4s ease-in-out infinite;
}

/* =========================================================
   CONCEPT
   ========================================================= */
.concept {
  display: grid; grid-template-columns: 1fr 1fr;
  background: var(--white);
}
.concept-text { padding: 120px 72px 120px 64px; }
.concept-visual {
  background: var(--cream); position: relative;
  display: flex; align-items: center; justify-content: center;
  min-height: 520px; overflow: hidden;
}
.section-label {
  font-size: 9px; letter-spacing: .4em; text-transform: uppercase;
  color: var(--taupe); margin-bottom: 40px;
  display: flex; align-items: center; gap: 14px;
}
.section-label::before {
  content: ''; display: block;
  width: 28px; height: 1px; background: var(--stone);
}
.concept-quote {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(18px, 2.5vw, 26px);
  font-weight: 300; line-height: 1.9; letter-spacing: .08em;
  color: var(--dark); margin-bottom: 36px;
}
.concept-body {
  font-size: 12px; line-height: 2.4;
  color: var(--brown); max-width: 340px;
}
.concept-deco {
  position: absolute; top: 36px; right: 36px;
  font-family: 'Cormorant Garamond', serif;
  font-size: 11px; font-style: italic; letter-spacing: .2em;
  color: var(--taupe); writing-mode: vertical-rl;
}
.concept-cross {
  width: 1px; height: 120px;
  background: var(--stone); opacity: .5; position: relative;
}
.concept-cross::after {
  content: ''; position: absolute;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 120px; height: 1px; background: var(--stone); opacity: .5;
}
.concept-botanical {
  position: absolute; left: 36px; bottom: 36px;
  width: 110px; opacity: .15;
}

/* =========================================================
   FEATURES
   ========================================================= */
.features { padding: 120px 64px; background: var(--ivory); }
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 2px; margin-top: 56px;
}
.feature-card {
  background: var(--white);
  padding: 56px 40px 64px;
  position: relative; overflow: hidden;
  transition: transform .3s var(--ease);
}
.feature-card:hover { transform: translateY(-4px); }
.feature-card::after {
  content: ''; position: absolute;
  bottom: 0; left: 0; width: 100%; height: 2px;
  background: var(--stone);
  transform: scaleX(0); transform-origin: left;
  transition: transform .5s var(--ease);
}
.feature-card:hover::after { transform: scaleX(1); }
.feature-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 48px; font-weight: 300;
  color: var(--stone); line-height: 1; margin-bottom: 24px;
}
.feature-title {
  font-family: 'Noto Serif JP', serif;
  font-size: 15px; color: var(--dark);
  margin-bottom: 14px; letter-spacing: .08em;
}
.feature-text {
  font-size: 12px; color: var(--taupe); line-height: 2.1;
}

/* =========================================================
   COLLECTION
   ========================================================= */
.collection { padding: 120px 64px; background: var(--cream); }
.collection-header {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 56px; gap: 24px;
}
.collection-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 300; letter-spacing: .04em;
}
.collection-note {
  font-size: 11px; letter-spacing: .2em;
  color: var(--taupe); text-transform: lowercase;
}
.items-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px;
}
.item-card {
  background: var(--white); overflow: hidden;
  cursor: pointer; transition: transform .4s var(--ease);
}
.item-card:hover { transform: translateY(-4px); }
.item-img {
  aspect-ratio: 3/4;
  background: var(--ivory);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; position: relative;
}
.item-img::before {
  content: ''; position: absolute;
  width: 72px; height: 72px; border-radius: 50%;
  border: 1px solid var(--stone); opacity: .5;
  transition: transform .6s var(--ease);
}
.item-card:hover .item-img::before { transform: scale(1.08); }
.item-img-icon {
  font-size: 24px; opacity: .35;
  font-family: 'Cormorant Garamond', serif;
  position: relative; z-index: 1;
}
.item-img-label {
  font-size: 9px; letter-spacing: .25em; text-transform: uppercase;
  color: var(--taupe); position: relative; z-index: 1;
}
.item-info { padding: 20px 20px 24px; }
.item-cat {
  font-size: 9px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--taupe); margin-bottom: 6px;
}
.item-name {
  font-family: 'Noto Serif JP', serif;
  font-size: 12px; color: var(--dark); margin-bottom: 8px;
}
.item-price {
  font-family: 'Cormorant Garamond', serif;
  font-size: 15px; color: var(--brown); letter-spacing: .08em;
}
.collection-foot {
  margin-top: 56px; text-align: center;
  font-size: 10px; letter-spacing: .2em; color: var(--taupe);
}

/* =========================================================
   SHOP CTA
   ========================================================= */
.shop-cta {
  background: var(--dark);
  padding: 120px 64px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 40px; position: relative; overflow: hidden;
}
.shop-cta::before {
  content: ''; position: absolute;
  right: -120px; top: 50%; transform: translateY(-50%);
  width: 360px; height: 360px; border-radius: 50%;
  border: 1px solid rgba(213, 202, 185, .15);
  pointer-events: none;
}
.shop-cta-text { position: relative; z-index: 1; }
.shop-cta-label {
  font-size: 9px; letter-spacing: .4em; text-transform: uppercase;
  color: var(--taupe); margin-bottom: 18px;
}
.shop-cta-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(26px, 3.5vw, 44px);
  font-weight: 300; color: var(--ivory); line-height: 1.3;
}
.shop-cta-sub {
  margin-top: 18px;
  font-size: 12px; color: var(--taupe); line-height: 2.1;
}
.shop-btn {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 20px 40px;
  border: 1px solid rgba(246, 241, 234, .3);
  color: var(--ivory);
  font-size: 11px; letter-spacing: .25em; text-transform: uppercase;
  text-decoration: none; white-space: nowrap;
  transition: background .3s var(--ease), border-color .3s var(--ease);
  position: relative; z-index: 1;
}
.shop-btn:hover { background: rgba(246, 241, 234, .08); border-color: var(--ivory); }
.shop-btn::after {
  content: '→';
  transition: transform .3s var(--ease);
}
.shop-btn:hover::after { transform: translateX(6px); }

/* =========================================================
   FOOTER
   ========================================================= */
footer {
  background: var(--ivory);
  border-top: 1px solid var(--stone);
  padding: 64px 64px 36px;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 48px; gap: 40px;
}
.footer-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 28px; font-weight: 300; letter-spacing: .1em;
  margin-bottom: 8px;
}
.footer-tagline {
  font-family: 'Cormorant Garamond', serif;
  font-style: italic; font-size: 12px;
  color: var(--taupe); letter-spacing: .15em;
}
.footer-links { display: flex; gap: 56px; }
.footer-col h4 {
  font-size: 10px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--brown); margin-bottom: 18px; font-weight: 400;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-col a {
  font-size: 12px; color: var(--taupe);
  text-decoration: none; transition: color .3s;
}
.footer-col a:hover { color: var(--dark); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px; border-top: 1px solid var(--cream);
}
.footer-copy {
  font-size: 10px; letter-spacing: .15em; color: var(--taupe);
}
.footer-sns { display: flex; gap: 20px; }
.sns-link {
  font-size: 10px; letter-spacing: .25em; text-transform: uppercase;
  color: var(--taupe); text-decoration: none; transition: color .3s;
}
.sns-link:hover { color: var(--dark); }

/* =========================================================
   ANIMATIONS
   ========================================================= */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}
@keyframes scrollPulse {
  0%, 100% { opacity: .35; transform: scaleY(.6); transform-origin: top; }
  50%      { opacity: 1;   transform: scaleY(1);   transform-origin: top; }
}

.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1024px) {
  .items-grid { grid-template-columns: repeat(3, 1fr); }
  nav { padding: 22px 32px; }
  .hero-left { padding: 130px 40px 64px; }
  .concept-text { padding: 96px 40px; }
  .features, .collection, .shop-cta { padding: 96px 40px; }
  footer { padding: 56px 40px 32px; }
}

@media (max-width: 768px) {
  nav { padding: 18px 24px; }
  nav.scrolled { padding: 14px 24px; }
  .nav-links { display: none; }

  .hero { grid-template-columns: 1fr; }
  .hero-left { padding: 110px 24px 64px; }
  .hero-right { min-height: 300px; }
  .hero-scroll { display: none; }

  .concept { grid-template-columns: 1fr; }
  .concept-text { padding: 72px 24px; }
  .concept-visual { min-height: 260px; }

  .features { padding: 80px 24px; }
  .features-grid { grid-template-columns: 1fr; }

  .collection { padding: 80px 24px; }
  .collection-header { flex-direction: column; align-items: flex-start; gap: 12px; }
  .items-grid { grid-template-columns: 1fr 1fr; }

  .shop-cta {
    flex-direction: column; align-items: flex-start;
    padding: 80px 24px;
  }
  .shop-cta::before { display: none; }

  footer { padding: 56px 24px 28px; }
  .footer-inner { flex-direction: column; gap: 36px; }
  .footer-links { gap: 32px; flex-wrap: wrap; }
  .footer-bottom { flex-direction: column; gap: 14px; align-items: flex-start; }
}

@media (max-width: 420px) {
  .items-grid { grid-template-columns: 1fr; }
}