/* ============ TRST shared styles ============ */
:root{
  --ivory:#F8F3EC;
  --beige:#E7DBC8;
  --gold:#B98A54;
  --gold-soft:#C9A47A;
  --charcoal:#2F2924;
  --muted:#7B6B5E;
  --line:#D8CBBE;
  --deep:#3A2D25;

  --serif-en: "Playfair Display", "Noto Serif JP", serif;
  --serif-jp: "Noto Serif JP", "Yu Mincho", "游明朝", serif;
  --sans-jp: "Noto Sans JP", "Yu Gothic", "游ゴシック", sans-serif;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1440px;
  --pad: clamp(20px, 5vw, 96px);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans-jp);
  font-weight:300;
  color:var(--charcoal);
  background:var(--ivory);
  line-height:1.9;
  font-size:14px;
  letter-spacing:0.04em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}

/* ============ HEADER ============ */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:88px;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 var(--pad);
  background:rgba(248,243,236,0);
  transition:background .5s var(--ease), backdrop-filter .5s var(--ease), border-color .5s var(--ease);
  border-bottom:1px solid transparent;
}
.header.scrolled,
.header.solid,
.header.menu-open{
  background:rgba(248,243,236,0.94);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.logo{display:block;line-height:0}
.logo img{height:46px;width:auto;display:block;transition:opacity .35s var(--ease)}
.logo:hover img{opacity:0.75}
.nav{display:flex;align-items:center;gap:42px}
.nav a{
  font-size:11px;letter-spacing:0.22em;font-weight:500;
  color:var(--charcoal);
  position:relative;padding:8px 0;
  transition:color .35s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:50%;bottom:2px;
  width:0;height:1px;background:var(--gold);
  transition:width .4s var(--ease), left .4s var(--ease);
}
.nav a:hover,
.nav a.active{color:var(--gold)}
.nav a:hover::after,
.nav a.active::after{width:100%;left:0}
.menu-btn{display:none}

/* ============ SECTION HELPERS ============ */
section.block{
  padding:clamp(80px, 12vw, 160px) var(--pad);
  max-width:var(--max);
  margin:0 auto;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:14px;
  font-family:var(--serif-en);
  font-size:13px;letter-spacing:0.32em;font-weight:500;
  color:var(--charcoal);
  margin-bottom:48px;
}
.eyebrow::before{
  content:"";display:inline-block;
  width:32px;height:1px;background:var(--gold);
}
.h-jp{
  font-family:var(--serif-jp);
  font-weight:300;
  font-size:clamp(24px, 2.8vw, 36px);
  line-height:1.9;
  letter-spacing:0.06em;
  color:var(--charcoal);
}
.h-jp .em{color:var(--gold)}
.body-jp{
  font-size:14px;line-height:2.1;letter-spacing:0.04em;
  color:var(--muted);font-weight:400;
}
.link-more{
  display:inline-flex;align-items:center;gap:14px;
  font-family:var(--serif-en);
  font-size:11px;letter-spacing:0.28em;font-weight:500;
  color:var(--charcoal);
  padding:8px 0;
  border-bottom:1px solid var(--charcoal);
  transition:color .35s var(--ease), border-color .35s var(--ease), gap .35s var(--ease);
}
.link-more svg{width:22px;height:8px;transition:transform .4s var(--ease)}
.link-more:hover{color:var(--gold);border-bottom-color:var(--gold);gap:20px}
.link-more:hover svg{transform:translateX(4px)}

/* ============ PAGE HEADER (sub pages) ============ */
.page-head{
  position:relative;
  min-height:clamp(420px, 58vh, 620px);
  padding:160px var(--pad) 80px;
  display:flex;flex-direction:column;
  justify-content:flex-end;align-items:flex-start;
  background-size:cover;
  background-position:center;
  overflow:hidden;
  color:#fff;
}
.page-head::before{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(180deg, rgba(47,41,36,0.18) 0%, rgba(47,41,36,0) 30%, rgba(47,41,36,0.05) 60%, rgba(47,41,36,0.55) 100%),
    linear-gradient(90deg, rgba(47,41,36,0.35) 0%, rgba(47,41,36,0) 55%);
  pointer-events:none;
}
.page-head-inner{
  position:relative;
  z-index:1;
  max-width:var(--max);
  width:100%;
  margin:0 auto;
}
.page-head .eyebrow{
  color:#fff;
  margin-bottom:24px;
}
.page-head .eyebrow::before{background:var(--gold-soft, #c9a47a)}
.page-head h1{
  font-family:var(--serif-en);
  font-size:clamp(40px, 5.4vw, 72px);
  font-weight:400;
  letter-spacing:0.06em;
  color:#fff;
  line-height:1.1;
  text-shadow:0 2px 30px rgba(0,0,0,0.15);
}
.page-head .ja{
  display:block;
  margin-top:18px;
  font-family:var(--serif-jp);
  font-size:14px;letter-spacing:0.32em;
  color:rgba(255,255,255,0.85);
  font-weight:400;
}
@media (max-width:720px){
  .page-head{min-height:340px;padding:140px var(--pad) 56px}
  .page-head h1{font-size:36px}
}

/* ============ FOOTER ============ */
footer{
  background:var(--ivory);
  border-top:1px solid var(--line);
  padding:72px var(--pad) 32px;
}
.ft-grid{
  max-width:var(--max);margin:0 auto;
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:64px;
  border-bottom:1px solid var(--line);
}
.ft-brand .logo{margin-bottom:24px}
.ft-brand p{
  font-size:12px;line-height:2;letter-spacing:0.08em;
  color:var(--muted);
  max-width:280px;
}
.ft-col h4{
  font-family:var(--serif-en);
  font-size:11px;letter-spacing:0.28em;
  font-weight:500;color:var(--charcoal);
  margin-bottom:20px;
}
.ft-col ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.ft-col a{
  font-size:12px;letter-spacing:0.1em;
  color:var(--muted);
  transition:color .35s var(--ease);
}
.ft-col a:hover{color:var(--gold)}
.ft-col .ja{font-size:10px;display:block;margin-top:2px;color:#a89880}
.ft-bottom{
  max-width:var(--max);margin:0 auto;
  padding-top:32px;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;
  font-size:10px;letter-spacing:0.18em;
  color:var(--muted);
}
.ft-bottom .socials{display:flex;gap:18px}
.ft-bottom .socials a{transition:color .35s var(--ease)}
.ft-bottom .socials a:hover{color:var(--gold)}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity 1s var(--ease), transform 1s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.1s}
.reveal.d2{transition-delay:.2s}
.reveal.d3{transition-delay:.3s}
.reveal.d4{transition-delay:.4s}

/* ============ RESPONSIVE ============ */
@media (max-width: 1100px){
  .ft-grid{grid-template-columns:1fr 1fr;gap:40px 24px}
}
@media (max-width: 720px){
  /* Nav becomes slide-in panel from the right */
  .nav{
    display:flex;
    position:fixed;
    top:88px;right:0;
    width:100%;
    height:calc(100vh - 88px);
    height:calc(100dvh - 88px);
    background:var(--ivory);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:24px clamp(20px, 5vw, 32px) 64px;
    transform:translateX(100%);
    transition:transform .45s var(--ease);
    z-index:99;
    overflow-y:auto;
    border-left:1px solid var(--line);
    box-shadow:-24px 0 48px -24px rgba(60,45,30,0.18);
  }
  .nav.open{transform:translateX(0)}
  .nav a{
    width:100%;
    padding:24px 4px;
    font-size:13px;letter-spacing:0.28em;
    border-bottom:1px solid var(--line);
  }
  .nav a::after{display:none}

  /* Hamburger button — ham to X */
  .menu-btn{
    display:flex;flex-direction:column;
    width:32px;height:20px;
    justify-content:space-between;align-items:center;
    position:relative;z-index:101;
  }
  .menu-btn span{
    display:block;width:24px;height:1px;background:var(--charcoal);
    transition:transform .4s var(--ease), opacity .25s var(--ease);
    transform-origin:center;
  }
  .menu-btn.open span:nth-child(1){transform:translateY(9.5px) rotate(45deg)}
  .menu-btn.open span:nth-child(2){opacity:0;transform:scaleX(0)}
  .menu-btn.open span:nth-child(3){transform:translateY(-9.5px) rotate(-45deg)}

  body.menu-open{overflow:hidden}
}