/* ==========================================================================
   Clay Vault Gate — Shared Design System
   土の建築とかたちの記憶 / Crafted From Earth, Built To Last
   ========================================================================== */

:root{
  --color-cream:#faf5ec;
  --color-cream-soft:#f3ead9;
  --color-beige:#ece0cb;
  --color-clay:#a86a45;
  --color-clay-light:#c98a5e;
  --color-terracotta:#b8623a;
  --color-terracotta-dark:#8f4a2c;
  --color-charcoal:#241f1a;
  --color-charcoal-soft:#3c332b;
  --color-stone:#8c8172;
  --color-ink:#211b16;

  --font-display:'Fraunces', 'Shippori Mincho', serif;
  --font-jp:'Shippori Mincho', serif;
  --font-body:'Zen Kaku Gothic New', 'Shippori Mincho', sans-serif;

  --shadow-soft:0 20px 60px -24px rgba(36,31,26,.45);
  --shadow-lift:0 30px 80px -30px rgba(36,31,26,.55);
  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:10px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--color-cream);
  color:var(--color-charcoal);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;margin:0;letter-spacing:.01em;}
p{margin:0;line-height:1.9;}
.jp{font-family:var(--font-jp);letter-spacing:.06em;}
section{position:relative;}

/* texture wash */
.texture-clay{
  background-image:
    radial-gradient(circle at 15% 20%, rgba(184,98,58,.10), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(168,106,69,.12), transparent 50%),
    linear-gradient(180deg, var(--color-cream), var(--color-cream-soft));
}
.container{
  width:100%;
  max-width:1320px;
  margin:0 auto;
  padding:0 clamp(20px,5vw,64px);
}

/* ---------------- Header / Nav ---------------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  width:100%;
  padding:22px 0;
  transition:background .5s var(--ease), padding .4s var(--ease), box-shadow .5s var(--ease);
}
.site-header.scrolled{
  padding:12px 0;
  background:rgba(250,245,236,.72);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 10px 40px -20px rgba(36,31,26,.35);
  border-bottom:1px solid rgba(36,31,26,.06);
}
.nav-wrap{
  max-width:1320px;
  margin:0 auto;
  padding:0 clamp(20px,5vw,64px);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{display:flex;align-items:center;gap:12px;}
.brand-logo{width:40px;height:40px;flex:none;filter:drop-shadow(0 4px 10px rgba(36,31,26,.25));}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-en{font-family:var(--font-display);font-weight:600;font-size:1.02rem;letter-spacing:.03em;color:var(--color-ink);}
.brand-jp{font-family:var(--font-jp);font-size:.66rem;color:var(--color-terracotta-dark);letter-spacing:.12em;}

.main-nav{display:flex;align-items:center;gap:clamp(14px,2vw,30px);font-size:.86rem;letter-spacing:.02em;}
.main-nav a{position:relative;padding:6px 2px;color:var(--color-charcoal-soft);transition:color .3s var(--ease);}
.main-nav a::after{
  content:'';position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--color-terracotta);
  transition:width .35s var(--ease);
}
.main-nav a:hover,.main-nav a.active{color:var(--color-terracotta-dark);}
.main-nav a:hover::after,.main-nav a.active::after{width:100%;}
.main-nav a.nav-cta{
  padding:9px 20px;border:1px solid var(--color-terracotta-dark);border-radius:999px;color:var(--color-terracotta-dark);
}
.main-nav a.nav-cta::after{display:none;}
.main-nav a.nav-cta:hover{background:var(--color-terracotta-dark);color:#fff;}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;z-index:1100;}
.nav-toggle span{width:24px;height:2px;background:var(--color-ink);transition:transform .3s var(--ease),opacity .3s var(--ease);}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

@media (max-width:920px){
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;inset:0 0 0 auto;width:min(78vw,340px);height:100vh;
    background:rgba(250,245,236,.98);backdrop-filter:blur(20px);
    flex-direction:column;align-items:flex-start;justify-content:center;
    padding:40px clamp(28px,8vw,48px);gap:22px;font-size:1.05rem;
    transform:translateX(100%);transition:transform .5s var(--ease);
    box-shadow:-30px 0 60px -30px rgba(36,31,26,.4);
  }
  .main-nav.open{transform:translateX(0);}
  .main-nav a.nav-cta{margin-top:10px;}
}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:16px 34px;border-radius:999px;font-size:.86rem;letter-spacing:.05em;
  border:1px solid transparent;cursor:pointer;transition:transform .4s var(--ease),box-shadow .4s var(--ease),background .4s var(--ease),color .4s var(--ease);
  font-family:var(--font-body);
}
.btn-primary{background:linear-gradient(135deg,var(--color-clay-light),var(--color-terracotta-dark));color:#fff;box-shadow:var(--shadow-soft);}
.btn-primary:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);}
.btn-ghost{border-color:rgba(250,245,236,.7);color:inherit;}
.btn-ghost:hover{background:rgba(250,245,236,.14);transform:translateY(-3px);}
.btn-outline{border-color:var(--color-terracotta-dark);color:var(--color-terracotta-dark);}
.btn-outline:hover{background:var(--color-terracotta-dark);color:#fff;transform:translateY(-3px);}
.btn-arrow{transition:transform .4s var(--ease);}
.btn:hover .btn-arrow{transform:translateX(5px);}

/* ---------------- Hero ---------------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:flex-end;overflow:hidden;
  color:#fff;
}
.hero-media{position:absolute;inset:0;overflow:hidden;}
.hero-media img{width:100%;height:100%;object-fit:cover;transform:scale(1.08);will-change:transform;}
.hero-media::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(33,27,22,.15) 0%, rgba(33,27,22,.35) 55%, rgba(33,27,22,.88) 100%);
}
.hero-content{position:relative;z-index:2;padding:0 clamp(20px,5vw,64px) clamp(50px,8vw,100px);width:100%;max-width:1320px;margin:0 auto;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-family:var(--font-jp);font-size:.8rem;letter-spacing:.24em;
  color:var(--color-cream-soft);opacity:.9;margin-bottom:22px;
}
.hero-eyebrow::before{content:'';width:36px;height:1px;background:var(--color-cream-soft);opacity:.7;}
.hero-title{font-size:clamp(2.4rem,6.4vw,5.2rem);line-height:1.04;font-weight:600;max-width:16ch;}
.hero-subtitle{margin-top:22px;font-family:var(--font-jp);font-size:clamp(1rem,1.6vw,1.3rem);color:var(--color-cream-soft);max-width:44ch;letter-spacing:.03em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:38px;}
.hero-scroll{
  position:absolute;right:clamp(20px,5vw,64px);bottom:40px;z-index:2;display:flex;flex-direction:column;align-items:center;gap:10px;
  color:var(--color-cream-soft);font-size:.7rem;letter-spacing:.3em;
}
.hero-scroll span{width:1px;height:56px;background:linear-gradient(180deg,rgba(250,245,236,.9),transparent);animation:scrollLine 2.4s infinite var(--ease);}
@keyframes scrollLine{0%{transform:scaleY(0);transform-origin:top;}50%{transform:scaleY(1);transform-origin:top;}50.1%{transform-origin:bottom;}100%{transform:scaleY(0);transform-origin:bottom;}}

/* page banner (inner pages hero) */
.page-banner{position:relative;min-height:62vh;display:flex;align-items:flex-end;color:#fff;overflow:hidden;}
.page-banner .hero-media img{transform:scale(1.02);}
.page-banner .hero-content{padding-bottom:clamp(40px,7vw,80px);}
.page-banner .hero-title{font-size:clamp(2rem,5vw,3.6rem);max-width:20ch;}

/* ---------------- Sections / editorial layout ---------------- */
.section{padding:clamp(70px,10vw,140px) 0;}
.section-head{max-width:760px;margin-bottom:clamp(40px,6vw,72px);}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-family:var(--font-jp);font-size:.78rem;letter-spacing:.24em;
  color:var(--color-terracotta-dark);margin-bottom:16px;
}
.eyebrow::before{content:'';width:30px;height:1px;background:var(--color-terracotta-dark);}
.section-title{font-size:clamp(1.9rem,4vw,3rem);}
.section-lede{margin-top:18px;font-size:1.05rem;color:var(--color-charcoal-soft);max-width:60ch;}

.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,6vw,90px);align-items:center;}
.split.reverse .split-media{order:2;}
.split-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-soft);aspect-ratio:4/5;}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform 1s var(--ease);}
.split-media:hover img{transform:scale(1.06);}
.split-text h3{font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:18px;}
.split-text p + p{margin-top:14px;}
.split-list{list-style:none;padding:0;margin:26px 0 0;display:flex;flex-direction:column;gap:14px;}
.split-list li{display:flex;gap:14px;align-items:flex-start;font-size:.95rem;color:var(--color-charcoal-soft);}
.split-list li::before{content:'';flex:none;width:8px;height:8px;margin-top:7px;border-radius:2px;background:var(--color-terracotta);transform:rotate(45deg);}

@media (max-width:860px){
  .split,.split.reverse{grid-template-columns:1fr;}
  .split.reverse .split-media{order:0;}
}

/* ---------------- Cards ---------------- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:28px;}
.card{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;background:var(--color-charcoal);
  box-shadow:var(--shadow-soft);
}
.card-media{aspect-ratio:5/6;overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease);}
.card:hover .card-media img{transform:scale(1.08);}
.card-body{position:absolute;left:0;right:0;bottom:0;padding:26px 26px 28px;color:#fff;
  background:linear-gradient(180deg, transparent, rgba(33,27,22,.9) 70%);}
.card-tag{font-family:var(--font-jp);font-size:.72rem;letter-spacing:.18em;color:var(--color-clay-light);}
.card-title{margin-top:8px;font-size:1.3rem;}
.card-desc{margin-top:8px;font-size:.86rem;color:rgba(255,255,255,.8);}
.card-link{margin-top:16px;display:inline-flex;align-items:center;gap:8px;font-size:.78rem;letter-spacing:.1em;color:#fff;}

.plain-card{
  background:#fff;border-radius:var(--radius-md);padding:32px;box-shadow:var(--shadow-soft);
  border:1px solid rgba(140,129,114,.14);
}

/* glass panel */
.glass-panel{
  background:rgba(250,245,236,.55);
  border:1px solid rgba(255,255,255,.4);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
}
.glass-dark{
  background:rgba(36,31,26,.45);
  border:1px solid rgba(255,255,255,.14);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}

/* stat-free feature strip */
.feature-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;}
.feature-item{padding:30px 26px;border-radius:var(--radius-md);background:var(--color-cream-soft);border:1px solid rgba(140,129,114,.16);}
.feature-item .num{font-family:var(--font-display);font-size:1.1rem;color:var(--color-terracotta-dark);}
.feature-item h4{margin-top:14px;font-size:1.15rem;}
.feature-item p{margin-top:10px;font-size:.9rem;color:var(--color-charcoal-soft);}

/* ---------------- CTA band ---------------- */
.cta-band{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;color:#fff;padding:clamp(50px,8vw,90px) clamp(24px,6vw,80px);
  text-align:center;
}
.cta-band .hero-media::after{background:linear-gradient(180deg, rgba(33,27,22,.55), rgba(33,27,22,.82));}
.cta-band-content{position:relative;z-index:2;max-width:640px;margin:0 auto;}
.cta-band .section-title{color:#fff;}
.cta-band p.jp{margin-top:14px;color:var(--color-cream-soft);}
.cta-band .hero-actions{justify-content:center;margin-top:32px;}

/* ---------------- Masonry Gallery ---------------- */
.masonry{columns:1;column-gap:20px;}
@media (min-width:640px){.masonry{columns:2;}}
@media (min-width:1024px){.masonry{columns:3;}}
.masonry figure{
  margin:0 0 20px;break-inside:avoid;border-radius:var(--radius-md);overflow:hidden;cursor:zoom-in;position:relative;
  box-shadow:var(--shadow-soft);
}
.masonry figure img{width:100%;display:block;transition:transform .7s var(--ease),filter .4s var(--ease);}
.masonry figure:hover img{transform:scale(1.05);}
.masonry figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;color:#fff;font-size:.78rem;letter-spacing:.05em;
  background:linear-gradient(180deg,transparent,rgba(33,27,22,.85));opacity:0;transition:opacity .4s var(--ease);
}
.masonry figure:hover figcaption{opacity:1;}

.lightbox{
  position:fixed;inset:0;z-index:2000;display:flex;align-items:center;justify-content:center;
  background:rgba(20,16,13,.92);opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s;
  padding:40px;
}
.lightbox.open{opacity:1;visibility:visible;}
.lightbox img{max-width:min(90vw,1100px);max-height:82vh;object-fit:contain;border-radius:12px;box-shadow:0 40px 100px rgba(0,0,0,.5);}
.lightbox-close,.lightbox-prev,.lightbox-next{
  position:absolute;background:rgba(250,245,236,.12);border:1px solid rgba(255,255,255,.25);color:#fff;
  width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background .3s var(--ease);font-size:1.2rem;
}
.lightbox-close:hover,.lightbox-prev:hover,.lightbox-next:hover{background:rgba(250,245,236,.28);}
.lightbox-close{top:26px;right:26px;}
.lightbox-prev{left:26px;top:50%;transform:translateY(-50%);}
.lightbox-next{right:26px;top:50%;transform:translateY(-50%);}
.lightbox-caption{position:absolute;bottom:28px;left:0;right:0;text-align:center;color:var(--color-cream-soft);font-size:.85rem;letter-spacing:.05em;}
@media (max-width:640px){.lightbox-prev,.lightbox-next{width:38px;height:38px;}.lightbox{padding:16px;}}

/* ---------------- Accordion (FAQ) ---------------- */
.accordion{display:flex;flex-direction:column;gap:14px;}
.accordion-item{border:1px solid rgba(140,129,114,.22);border-radius:var(--radius-md);background:#fff;overflow:hidden;}
.accordion-trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;
  padding:22px 26px;background:none;border:none;cursor:pointer;font-family:var(--font-display);font-size:1.06rem;color:var(--color-ink);
}
.accordion-icon{position:relative;width:20px;height:20px;flex:none;}
.accordion-icon::before,.accordion-icon::after{content:'';position:absolute;background:var(--color-terracotta-dark);border-radius:2px;transition:transform .35s var(--ease);}
.accordion-icon::before{left:0;top:9px;width:20px;height:2px;}
.accordion-icon::after{left:9px;top:0;width:2px;height:20px;}
.accordion-item.open .accordion-icon::after{transform:rotate(90deg);opacity:0;}
.accordion-panel{max-height:0;overflow:hidden;transition:max-height .5s var(--ease);}
.accordion-panel-inner{padding:0 26px 24px;color:var(--color-charcoal-soft);font-size:.94rem;line-height:1.85;}
.accordion-item.open .accordion-panel{max-height:400px;}

/* ---------------- Forms ---------------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.form-field{display:flex;flex-direction:column;gap:8px;}
.form-field.full{grid-column:1/-1;}
.form-field label{font-size:.78rem;letter-spacing:.1em;color:var(--color-charcoal-soft);}
.form-field input,.form-field select,.form-field textarea{
  padding:15px 16px;border-radius:var(--radius-sm);border:1px solid rgba(140,129,114,.3);
  background:var(--color-cream-soft);font-family:var(--font-body);font-size:.94rem;color:var(--color-ink);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{
  outline:none;border-color:var(--color-terracotta);box-shadow:0 0 0 4px rgba(184,98,58,.14);
}
.form-field textarea{resize:vertical;min-height:130px;}
@media (max-width:720px){.form-grid{grid-template-columns:1fr;}}

/* ---------------- Toast (non-blocking popup) ---------------- */
.toast-stack{position:fixed;z-index:4000;right:20px;bottom:20px;display:flex;flex-direction:column;gap:12px;max-width:360px;width:calc(100% - 40px);}
.toast{
  display:flex;align-items:flex-start;gap:12px;padding:16px 18px;border-radius:14px;background:var(--color-charcoal);color:#fff;
  box-shadow:var(--shadow-lift);transform:translateY(20px);opacity:0;transition:transform .4s var(--ease),opacity .4s var(--ease);
  border-left:3px solid var(--color-terracotta);
}
.toast.show{transform:translateY(0);opacity:1;}
.toast .toast-icon{flex:none;width:22px;height:22px;border-radius:50%;background:var(--color-terracotta);display:flex;align-items:center;justify-content:center;font-size:.72rem;}
.toast .toast-text{font-size:.85rem;line-height:1.5;}
.toast .toast-text strong{display:block;font-family:var(--font-display);font-size:.92rem;margin-bottom:2px;}
.toast-close{margin-left:auto;background:none;border:none;color:rgba(255,255,255,.6);cursor:pointer;font-size:1rem;}

/* ---------------- Footer ---------------- */
.site-footer{background:var(--color-charcoal);color:rgba(250,245,236,.82);}
.footer-top{
  padding:clamp(60px,8vw,90px) 0 50px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;
  max-width:1320px;margin:0 auto;padding-left:clamp(20px,5vw,64px);padding-right:clamp(20px,5vw,64px);
}
.footer-brand .brand-en{color:#fff;}
.footer-brand p{margin-top:16px;font-size:.88rem;color:rgba(250,245,236,.62);max-width:34ch;}
.footer-social{display:flex;gap:14px;margin-top:22px;}
.footer-social a{width:38px;height:38px;border-radius:50%;border:1px solid rgba(250,245,236,.25);display:flex;align-items:center;justify-content:center;font-size:.8rem;transition:background .3s var(--ease),border-color .3s var(--ease);}
.footer-social a:hover{background:rgba(250,245,236,.12);border-color:rgba(250,245,236,.5);}
.footer-col h5{font-family:var(--font-display);font-size:.94rem;color:#fff;margin-bottom:18px;letter-spacing:.03em;}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:.88rem;color:rgba(250,245,236,.68);transition:color .3s var(--ease);}
.footer-col a:hover{color:var(--color-clay-light);}
.footer-col address{font-style:normal;font-size:.88rem;line-height:1.8;color:rgba(250,245,236,.68);}
.footer-bottom{
  border-top:1px solid rgba(250,245,236,.12);padding:22px clamp(20px,5vw,64px);display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;font-size:.78rem;color:rgba(250,245,236,.5);max-width:1320px;margin:0 auto;
}
@media (max-width:980px){.footer-top{grid-template-columns:1fr 1fr;}}
@media (max-width:560px){.footer-top{grid-template-columns:1fr;}}

.back-to-top{
  position:fixed;right:24px;bottom:24px;z-index:900;width:52px;height:52px;border-radius:50%;
  background:var(--color-charcoal);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-soft);opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .4s var(--ease),transform .4s var(--ease);cursor:pointer;border:none;font-size:1.1rem;
}
.back-to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}

/* ---------------- Reveal / parallax ---------------- */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .9s var(--ease),transform .9s var(--ease);}
.reveal.in-view{opacity:1;transform:translateY(0);}
[data-parallax]{will-change:transform;}

/* ---------------- Breadcrumb ---------------- */
.breadcrumb{font-size:.78rem;letter-spacing:.08em;color:rgba(250,245,236,.75);display:flex;gap:8px;align-items:center;}
.breadcrumb a{color:rgba(250,245,236,.75);}
.breadcrumb a:hover{color:#fff;}

/* utility */
.text-center{text-align:center;}
.mx-auto{margin-left:auto;margin-right:auto;}
.mt-lg{margin-top:clamp(40px,6vw,72px);}