/* ==========================================================================
   Willow Blend Grove — Shared Stylesheet
   柳と水の庭園 — 共有スタイルシート
   ========================================================================== */

:root{
  --willow:      #7c9473;
  --willow-dark: #57724c;
  --willow-pale: #b9c9a9;
  --moss:        #4a5d3a;
  --river:       #7fa8b0;
  --river-dark:  #4c7480;
  --river-pale:  #cfe1e2;
  --beige:       #e8dfc9;
  --cream:       #faf7f0;
  --cream-dim:   #f2ecdf;
  --ink:         #2f2f27;
  --ink-soft:    #55564a;
  --gold:        #b99a5b;
  --shadow-soft: 0 20px 60px -20px rgba(47,47,39,0.35);
}

*{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  background-color:var(--cream);
  color:var(--ink);
  font-family:'Shippori Mincho', 'Cormorant Garamond', serif;
  overflow-x:hidden;
}

/* ---------- Typography ---------- */
.font-display{ font-family:'Italiana', 'Zen Old Mincho', serif; letter-spacing:.04em; }
.font-jp-head{ font-family:'Zen Old Mincho', serif; }
.font-jp-body{ font-family:'Shippori Mincho', serif; }
.font-en{ font-family:'Cormorant Garamond', serif; }
.tracking-wide-jp{ letter-spacing:.18em; }

.text-outline{
  -webkit-text-stroke: 1px rgba(47,47,39,0.35);
  color:transparent;
}

/* ---------- Texture Overlay ---------- */
.grain::before{
  content:"";
  position:absolute; inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  pointer-events:none;
  mix-blend-mode:overlay;
  z-index:2;
}

/* ---------- Sticky Nav ---------- */
#site-nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  transition:background-color .5s ease, padding .4s ease, box-shadow .4s ease, backdrop-filter .4s ease;
  padding:1.6rem 0;
}
#site-nav.scrolled{
  background-color:rgba(250,247,240,0.82);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 8px 30px -12px rgba(47,47,39,0.18);
  padding:.75rem 0;
}
#site-nav .nav-link{
  position:relative; padding-bottom:4px;
  color:var(--ink);
  opacity:.85;
}
#site-nav.on-dark:not(.scrolled) .nav-link,
#site-nav.on-dark:not(.scrolled) .logo-word{ color:#faf7f0; }
#site-nav .nav-link::after{
  content:""; position:absolute; left:0; bottom:0; height:1px; width:0;
  background:currentColor; transition:width .35s ease;
}
#site-nav .nav-link:hover::after,
#site-nav .nav-link.active::after{ width:100%; }
#site-nav .nav-link:hover{ opacity:1; }

.logo-mark{ width:40px; height:40px; flex-shrink:0; transition:transform .6s ease; }
.logo-mark:hover{ transform:rotate(8deg); }

/* Dropdown */
.nav-dropdown{ position:relative; }
.nav-dropdown-panel{
  position:absolute; top:calc(100% + 14px); left:50%; transform:translateX(-50%) translateY(6px);
  min-width:230px; background:rgba(250,247,240,0.97); border:1px solid rgba(47,47,39,0.08);
  box-shadow:var(--shadow-soft); border-radius:6px; padding:.6rem;
  opacity:0; visibility:hidden; transition:all .3s ease;
}
.nav-dropdown:hover .nav-dropdown-panel,
.nav-dropdown.open .nav-dropdown-panel{
  opacity:1; visibility:visible; transform:translateX(-50%) translateY(0);
}
.nav-dropdown-panel a{
  display:block; padding:.55rem .9rem; color:var(--ink); font-size:.92rem; border-radius:4px;
  transition:background .25s ease, padding-left .25s ease;
}
.nav-dropdown-panel a:hover{ background:var(--cream-dim); padding-left:1.15rem; color:var(--moss); }

/* Mobile drawer */
#mobile-drawer{
  position:fixed; inset:0 0 0 auto; width:min(88vw,380px); z-index:200;
  background:var(--cream); box-shadow:-20px 0 60px rgba(0,0,0,.25);
  transform:translateX(100%); transition:transform .5s cubic-bezier(.77,0,.18,1);
  overflow-y:auto;
}
#mobile-drawer.open{ transform:translateX(0); }
#drawer-overlay{
  position:fixed; inset:0; background:rgba(47,47,39,.45); z-index:190;
  opacity:0; visibility:hidden; transition:opacity .4s ease;
  backdrop-filter:blur(2px);
}
#drawer-overlay.open{ opacity:1; visibility:visible; }
.hamburger{ width:28px; height:20px; position:relative; }
.hamburger span{
  position:absolute; left:0; width:100%; height:1.5px; background:currentColor;
  transition:all .35s ease;
}
.hamburger span:nth-child(1){ top:0; }
.hamburger span:nth-child(2){ top:9px; }
.hamburger span:nth-child(3){ top:18px; }
.hamburger.open span:nth-child(1){ transform:translateY(9px) rotate(45deg); }
.hamburger.open span:nth-child(2){ opacity:0; }
.hamburger.open span:nth-child(3){ transform:translateY(-9px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero{
  position:relative; min-height:100svh; display:flex; align-items:flex-end;
  overflow:hidden; color:#fdfbf5;
}
.hero-bg{
  position:absolute; inset:-4% -4% -4% -4%;
  background-size:cover; background-position:center;
  transform:scale(1.08);
  animation:heroBreathe 26s ease-in-out infinite alternate;
}
@keyframes heroBreathe{
  0%{ transform:scale(1.08) translateY(0); }
  100%{ transform:scale(1.16) translateY(-1.4%); }
}
.hero-gradient{
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(30,34,24,.35) 0%, rgba(30,34,24,.12) 32%, rgba(24,28,20,.55) 78%, rgba(20,24,16,.86) 100%);
}
.hero-mist{
  position:absolute; left:-20%; right:-20%; bottom:0; height:46%;
  background:linear-gradient(180deg, rgba(250,247,240,0) 0%, rgba(250,247,240,.5) 60%, rgba(250,247,240,.72) 100%);
  filter:blur(6px);
  animation:mistDrift 18s ease-in-out infinite alternate;
}
@keyframes mistDrift{
  0%{ transform:translateX(-2%) translateY(0); opacity:.85; }
  100%{ transform:translateX(2.5%) translateY(-1.5%); opacity:1; }
}
.hero-inner{ position:relative; z-index:5; width:100%; }

/* subpage hero (shorter) */
.hero-sub{ min-height:62svh; }
@media (max-width:640px){ .hero-sub{ min-height:56svh; } }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:.6rem;
  padding:.95rem 2.1rem; font-family:'Cormorant Garamond', serif; font-size:1.02rem;
  letter-spacing:.14em; text-transform:uppercase;
  border-radius:2px; transition:all .45s cubic-bezier(.2,.8,.2,1);
  position:relative; overflow:hidden; white-space:nowrap;
}
.btn-primary{ background:var(--willow-dark); color:#fdfbf5; border:1px solid var(--willow-dark); }
.btn-primary:hover{ background:var(--moss); border-color:var(--moss); transform:translateY(-2px); box-shadow:0 14px 30px -10px rgba(74,93,58,.55); }
.btn-outline{ background:transparent; color:inherit; border:1px solid currentColor; }
.btn-outline:hover{ background:rgba(250,247,240,.14); transform:translateY(-2px); }
.btn-dark{ background:var(--ink); color:var(--cream); border:1px solid var(--ink); }
.btn-dark:hover{ background:transparent; color:var(--ink); }
.btn::before{
  content:""; position:absolute; inset:0; background:rgba(255,255,255,.16);
  transform:translateX(-110%); transition:transform .55s ease;
}
.btn:hover::before{ transform:translateX(0); }

/* ---------- Reveal on scroll ---------- */
.reveal{ opacity:0; transform:translateY(38px); transition:opacity 1s cubic-bezier(.2,.7,.2,1), transform 1.1s cubic-bezier(.2,.7,.2,1); }
.reveal.in-view{ opacity:1; transform:translateY(0); }
.reveal-scale{ opacity:0; transform:scale(.94); transition:opacity 1.1s ease, transform 1.1s cubic-bezier(.2,.7,.2,1); }
.reveal-scale.in-view{ opacity:1; transform:scale(1); }
.reveal-line{ opacity:0; transform:translateX(-30px); transition:opacity .9s ease, transform .9s ease; }
.reveal-line.in-view{ opacity:1; transform:translateX(0); }
.stagger.in-view > *{ transition-delay:calc(var(--i,0) * 120ms); }

/* ---------- Editorial Image Cards ---------- */
.editorial-card{
  position:relative; overflow:hidden; border-radius:3px; isolation:isolate;
  box-shadow:var(--shadow-soft);
}
.editorial-card img{ transition:transform 1.4s cubic-bezier(.2,.7,.2,1), filter .8s ease; }
.editorial-card:hover img{ transform:scale(1.08); filter:saturate(1.08); }
.editorial-card .card-veil{
  position:absolute; inset:0; background:linear-gradient(180deg, rgba(20,22,16,0) 40%, rgba(20,22,16,.78) 100%);
}
.editorial-card .card-caption{
  position:absolute; left:0; right:0; bottom:0; padding:1.6rem;
  transform:translateY(8px); opacity:.92; transition:transform .5s ease;
}
.editorial-card:hover .card-caption{ transform:translateY(0); }

/* ---------- Glass panel ---------- */
.glass-panel{
  background:rgba(250,247,240,.55);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border:1px solid rgba(255,255,255,.45);
  box-shadow:0 20px 55px -25px rgba(47,47,39,.4);
}
.glass-panel-dark{
  background:rgba(47,47,39,.32);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border:1px solid rgba(255,255,255,.16);
}

/* ---------- Willow branch decorative sway ---------- */
.branch-deco{ animation:sway 7s ease-in-out infinite; transform-origin:top center; }
.branch-deco.b2{ animation-duration:8.5s; animation-delay:.6s; }
.branch-deco.b3{ animation-duration:6.2s; animation-delay:1.2s; }
@keyframes sway{
  0%,100%{ transform:rotate(-2.2deg); }
  50%{ transform:rotate(2.2deg); }
}

/* ---------- Water shimmer divider ---------- */
.water-divider{
  height:64px; width:100%;
  background:linear-gradient(120deg, var(--river-pale) 0%, var(--cream) 40%, var(--river-pale) 60%, var(--cream) 100%);
  background-size:220% 100%;
  animation:shimmer 9s linear infinite;
  opacity:.55;
}
@keyframes shimmer{ 0%{ background-position:0% 0; } 100%{ background-position:220% 0; } }

/* ---------- Section labels ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:.7rem;
  font-family:'Cormorant Garamond', serif; letter-spacing:.32em; text-transform:uppercase;
  font-size:.78rem; color:var(--willow-dark);
}
.eyebrow::before{ content:""; width:34px; height:1px; background:var(--gold); display:inline-block; }

/* ---------- FAQ Accordion ---------- */
.faq-item{ border-bottom:1px solid rgba(47,47,39,.14); }
.faq-q{
  cursor:pointer; display:flex; align-items:center; justify-content:space-between; gap:1rem;
  padding:1.6rem 0; font-family:'Zen Old Mincho', serif; font-size:1.15rem;
}
.faq-q .plus{ position:relative; width:20px; height:20px; flex-shrink:0; }
.faq-q .plus::before, .faq-q .plus::after{
  content:""; position:absolute; background:var(--moss); transition:transform .4s ease;
}
.faq-q .plus::before{ left:0; top:9px; width:20px; height:1.4px; }
.faq-q .plus::after{ left:9px; top:0; width:1.4px; height:20px; }
.faq-item.open .plus::after{ transform:rotate(90deg); opacity:0; }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .55s cubic-bezier(.2,.7,.2,1), padding .4s ease; }
.faq-item.open .faq-a{ max-height:400px; padding-bottom:1.7rem; }

/* ---------- Masonry Gallery ---------- */
.masonry{ columns:1; column-gap:1rem; }
@media(min-width:640px){ .masonry{ columns:2; } }
@media(min-width:1024px){ .masonry{ columns:3; } }
.masonry-item{ break-inside:avoid; margin-bottom:1rem; position:relative; overflow:hidden; border-radius:3px; cursor:zoom-in; }
.masonry-item img{ width:100%; display:block; transition:transform 1s ease, filter .6s ease; }
.masonry-item:hover img{ transform:scale(1.06); }
.masonry-item .m-veil{ position:absolute; inset:0; background:rgba(20,22,16,0); transition:background .4s ease; display:flex; align-items:flex-end; padding:1rem; opacity:0; }
.masonry-item:hover .m-veil{ background:rgba(20,22,16,.38); opacity:1; }

/* Lightbox */
#lightbox{
  position:fixed; inset:0; z-index:300; background:rgba(18,20,14,.94);
  display:flex; align-items:center; justify-content:center;
  opacity:0; visibility:hidden; transition:opacity .4s ease;
  padding:5vh 5vw;
}
#lightbox.open{ opacity:1; visibility:visible; }
#lightbox img{ max-width:100%; max-height:88vh; box-shadow:0 30px 90px rgba(0,0,0,.6); border:6px solid #faf7f0; }
#lightbox .lb-close{ position:absolute; top:28px; right:32px; color:#faf7f0; font-size:2rem; cursor:pointer; }
#lightbox .lb-cap{ position:absolute; bottom:30px; left:0; right:0; text-align:center; color:#e8dfc9; font-family:'Cormorant Garamond',serif; letter-spacing:.1em; }

/* ---------- Contact Form ---------- */
.field{
  width:100%; background:transparent; border:none; border-bottom:1px solid rgba(47,47,39,.3);
  padding:.85rem .2rem; font-family:'Shippori Mincho', serif; color:var(--ink);
  transition:border-color .35s ease;
}
.field:focus{ outline:none; border-color:var(--willow-dark); }
.field-label{ font-family:'Cormorant Garamond',serif; letter-spacing:.18em; text-transform:uppercase; font-size:.78rem; color:var(--ink-soft); }

/* ---------- Toast (non-blocking popups) ---------- */
#toast-stack{
  position:fixed; top:1.4rem; right:1.4rem; z-index:400;
  display:flex; flex-direction:column; gap:.7rem; max-width:min(92vw,360px);
}
.toast{
  background:var(--ink); color:var(--cream); padding:1rem 1.3rem; border-radius:4px;
  box-shadow:0 20px 45px -15px rgba(0,0,0,.5); display:flex; align-items:flex-start; gap:.75rem;
  font-family:'Cormorant Garamond', serif; letter-spacing:.02em; font-size:1rem;
  transform:translateX(120%); opacity:0; transition:transform .5s cubic-bezier(.2,.8,.2,1), opacity .5s ease;
  border-left:3px solid var(--willow);
}
.toast.show{ transform:translateX(0); opacity:1; }
.toast .t-close{ margin-left:auto; cursor:pointer; opacity:.6; }
.toast .t-close:hover{ opacity:1; }

/* ---------- Back to top ---------- */
#back-to-top{
  position:fixed; right:1.4rem; bottom:1.4rem; z-index:150;
  width:46px; height:46px; border-radius:50%; background:var(--ink); color:var(--cream);
  display:flex; align-items:center; justify-content:center;
  opacity:0; visibility:hidden; transform:translateY(10px); transition:all .4s ease;
  box-shadow:0 12px 30px -10px rgba(0,0,0,.4);
}
#back-to-top.show{ opacity:1; visibility:visible; transform:translateY(0); }
#back-to-top:hover{ background:var(--moss); }

/* ---------- Misc ---------- */
.divider-leaf{ width:1px; height:60px; background:linear-gradient(180deg, transparent, var(--gold), transparent); margin:0 auto; }
.number-mark{ font-family:'Italiana', serif; font-size:.85rem; color:var(--gold); letter-spacing:.2em; }
::selection{ background:var(--willow-pale); color:var(--moss); }

/* Lazy image fade-in */
img.lazy-fade{ opacity:0; transition:opacity .9s ease; }
img.lazy-fade.loaded{ opacity:1; }

/* Footer wave top */
.footer-wave{ display:block; width:100%; height:60px; }

/* Scrollbar accent */
::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-track{ background:var(--cream); }
::-webkit-scrollbar-thumb{ background:var(--willow-pale); border-radius:10px; }

@media (max-width:768px){
  .hero-inner h1{ line-height:1.05; }
}