/* ============ TOKENS ============ */
:root{
  --soil:#2E3325;
  --paper:#F7F4EC;
  --paper-2:#EFEADD;
  --rice:#C9A24B;
  --moss:#6B7A4F;
  --clay:#8A9EA6;
  --ink:#1A1D16;
  --line:rgba(46,51,37,.16);
  --shadow:0 18px 50px -28px rgba(26,29,22,.55);
  --ff-disp:"Zen Antique", serif;
  --ff-body:"Zen Kaku Gothic New", system-ui, sans-serif;
  --ff-mono:"Space Grotesk", monospace;
  --wrap:1200px;
  --gut:clamp(1.15rem, 4vw, 3.5rem);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--ff-body);
  background:var(--paper);
  color:var(--soil);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3{line-height:1.28;font-weight:400}
a{color:inherit;text-decoration:none}
img,svg{display:block}
strong{font-weight:700}
::selection{background:var(--rice);color:var(--ink)}

.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.045;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode:multiply;
}

/* ============ HEADER ============ */
.site-head{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:.85rem var(--gut);
  background:rgba(247,244,236,.82);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .4s, background .4s, padding .4s;
}
.site-head.scrolled{border-bottom-color:var(--line);padding-top:.6rem;padding-bottom:.6rem}
.brand{display:flex;align-items:center;gap:.7rem}
.brand-mark{color:var(--moss);display:grid;place-items:center}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-ja{font-family:var(--ff-disp);font-size:1.02rem;letter-spacing:.04em}
.brand-sub{font-size:.68rem;letter-spacing:.22em;color:var(--moss)}
.site-nav{display:flex;align-items:center;gap:2rem}
.site-nav a{font-size:.9rem;letter-spacing:.05em;position:relative;padding:.2rem 0}
.site-nav a:not(.nav-cta)::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--soil);transition:width .35s;
}
.site-nav a:not(.nav-cta):hover::after{width:100%}
.site-nav a.nav-cta{
  background:var(--soil);color:var(--paper);padding:.62rem 1.4rem;border-radius:100px;font-size:.85rem;
  letter-spacing:.06em;box-shadow:0 6px 18px -10px rgba(46,51,37,.7);
  transition:background .3s,transform .3s,box-shadow .3s;
}
.nav-cta:hover{background:var(--moss);transform:translateY(-2px);box-shadow:0 10px 22px -10px rgba(107,122,79,.8)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:.4rem}
.nav-toggle span{width:26px;height:2px;background:var(--soil);transition:.35s}

/* ============ HERO ============ */
.hero{
  position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding:8rem var(--gut) 0;overflow:hidden;
}
.hero-sky{position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(120% 80% at 78% 8%, #FBF3DC 0%, rgba(251,243,220,0) 55%),
    linear-gradient(180deg,#F7F4EC 0%, #F1ECDD 46%, #E7E0CE 100%);
}
.hero-field{position:absolute;left:0;right:0;bottom:0;height:46vh;z-index:0}
.hero-field .rows{width:100%;height:100%}
.hero-inner{position:relative;z-index:2;max-width:var(--wrap);width:100%;margin:0 auto}
.eyebrow{
  font-family:var(--ff-mono);font-size:.8rem;letter-spacing:.34em;text-transform:uppercase;
  color:var(--moss);margin-bottom:1.6rem;
}
.hero-title{
  font-family:var(--ff-disp);
  font-size:clamp(2.9rem,8.2vw,6.6rem);
  line-height:1.04;letter-spacing:.01em;color:var(--ink);
}
.hero-title span{display:block}
.hero-title .accent{color:var(--moss)}
.hero-title .accent::after{content:"";display:inline-block;width:.34em;height:.34em;margin-left:.18em;border-radius:50%;background:var(--rice);vertical-align:.1em}
.hero-lede{
  margin-top:2rem;max-width:40rem;font-size:clamp(1rem,1.5vw,1.14rem);color:#454a3a;
}
.hero-lede strong{color:var(--soil);border-bottom:2px solid var(--rice);padding-bottom:1px}
.hero-actions{display:flex;flex-wrap:wrap;gap:1rem;margin-top:2.6rem}
.hero-foot{
  position:relative;z-index:2;max-width:var(--wrap);width:100%;margin:auto auto 0;
  display:flex;align-items:center;gap:1.6rem;padding:2.8rem 0 2.2rem;flex-wrap:wrap;
}
.hero-foot-item{font-size:.92rem;color:#4c5240;letter-spacing:.03em}
.hero-foot-item em{font-family:var(--ff-disp);font-style:normal;font-size:1.5rem;color:var(--soil);margin-right:.4rem}
.hero-foot-sep{width:1px;height:26px;background:var(--line)}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  font-size:.95rem;letter-spacing:.05em;padding:.85rem 1.9rem;border-radius:2px;cursor:pointer;
  border:1px solid transparent;transition:transform .3s, background .3s, color .3s, border-color .3s;
}
.btn-solid{background:var(--soil);color:var(--paper)}
.btn-solid:hover{background:var(--moss);transform:translateY(-2px)}
.btn-ghost{border-color:var(--soil);color:var(--soil)}
.btn-ghost:hover{background:var(--soil);color:var(--paper);transform:translateY(-2px)}
.btn-full{width:100%}

/* ============ SECTION INDEX ============ */
.sec-index{
  display:flex;align-items:center;gap:.85rem;font-family:var(--ff-mono);
  font-size:.78rem;letter-spacing:.28em;text-transform:uppercase;color:var(--moss);
  margin-bottom:2.4rem;
}
.sec-index span{
  font-family:var(--ff-disp);font-size:1.1rem;letter-spacing:0;color:var(--soil);
  border:1px solid var(--line);width:2.4rem;height:2.4rem;display:grid;place-items:center;border-radius:50%;
}
.sec-index.light{color:rgba(247,244,236,.7)}
.sec-index.light span{color:var(--paper);border-color:rgba(247,244,236,.3)}

/* ============ PHILOSOPHY ============ */
.philosophy{max-width:var(--wrap);margin:0 auto;padding:clamp(5rem,10vw,8.5rem) var(--gut)}
.phil-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(2rem,6vw,5.5rem);align-items:start}
.phil-lead h2{font-family:var(--ff-disp);font-size:clamp(2rem,4.2vw,3.3rem);color:var(--ink)}
.phil-figure{margin-top:2.2rem;position:relative}
.phil-figure img{
  width:100%;height:auto;aspect-ratio:1/1;object-fit:cover;border-radius:6px;
  box-shadow:var(--shadow);filter:saturate(.96);transition:transform .6s cubic-bezier(.2,.7,.2,1)
}
.phil-figure:hover img{transform:translateY(-4px) scale(1.012)}
.phil-figure::before{
  content:"";position:absolute;left:-14px;top:-14px;width:56px;height:56px;
  border-left:2px solid var(--rice);border-top:2px solid var(--rice);border-radius:4px 0 0 0;opacity:.8
}
.phil-figure figcaption{
  margin-top:.9rem;font-family:var(--ff-disp);font-size:.98rem;color:var(--moss);letter-spacing:.03em
}
.phil-body{font-size:1.06rem;color:#3f4536}
.phil-first{font-size:1.2rem;line-height:1.9;color:var(--soil)}
.phil-body p+p{margin-top:1.3rem}
.phil-pillars{list-style:none;margin-top:2.8rem;display:grid;gap:1.1rem}
.phil-pillars li{
  display:grid;grid-template-columns:auto 1fr;gap:.4rem 1.1rem;align-items:center;
  padding:1.15rem 1.3rem;background:var(--paper-2);border-radius:4px;
  border-left:3px solid var(--moss);
}
.phil-pillars b{grid-column:2;font-size:1.02rem;color:var(--soil)}
.phil-pillars li{grid-template-rows:auto auto}
.phil-pillars .p-mark{
  grid-row:1 / span 2;font-family:var(--ff-disp);font-size:1.5rem;color:var(--paper);
  background:var(--moss);width:2.9rem;height:2.9rem;display:grid;place-items:center;border-radius:50%;
}
.phil-pillars li{font-size:.94rem;color:#535a47;line-height:1.7}

/* ============ CYCLE (signature) ============ */
.cycle{background:var(--soil);color:var(--paper);padding:clamp(5rem,10vw,8.5rem) var(--gut);position:relative;overflow:hidden}
.cycle::before{content:"";position:absolute;inset:0;background:radial-gradient(80% 60% at 50% 0%, rgba(201,162,75,.14), transparent 60%);pointer-events:none}
.cycle-head{max-width:var(--wrap);margin:0 auto 3.5rem;position:relative}
.cycle-head h2{font-family:var(--ff-disp);font-size:clamp(2rem,4.5vw,3.4rem);margin-bottom:1.2rem}
.cycle-head p{max-width:42rem;color:rgba(247,244,236,.78);font-size:1.03rem}
.cycle-stage{
  max-width:var(--wrap);margin:0 auto;display:grid;grid-template-columns:minmax(0,440px) 1fr;
  gap:clamp(2rem,6vw,5rem);align-items:center;position:relative;
}
.ring-wrap{position:relative;aspect-ratio:1;width:100%}
.ring{width:100%;height:100%;overflow:visible}
.ring-track{fill:none;stroke:rgba(247,244,236,.14);stroke-width:1.5}
.ring-progress{
  fill:none;stroke:var(--rice);stroke-width:2.5;stroke-linecap:round;
  stroke-dasharray:100;stroke-dashoffset:100;
  transform:rotate(-90deg);transform-origin:230px 230px;
  transition:stroke-dashoffset .9s cubic-bezier(.6,.02,.2,1);
}
.ring-node circle{fill:var(--soil);stroke:rgba(247,244,236,.5);stroke-width:2;transition:.4s;cursor:pointer}
.ring-node.on circle{fill:var(--rice);stroke:var(--rice);r:12}
.ring-center-l{fill:rgba(247,244,236,.55);font-family:var(--ff-mono);font-size:12px;letter-spacing:4px;text-anchor:middle}
.ring-center-b{fill:var(--paper);font-family:var(--ff-disp);font-size:26px;text-anchor:middle}

.season-cards{position:relative;min-height:230px}
.season-card{
  position:absolute;inset:0;display:grid;grid-template-columns:auto 1fr;gap:1.6rem;align-items:center;
  opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity .6s, transform .6s;
}
.season-card.is-active{opacity:1;transform:none;pointer-events:auto}
.season-kanji{
  font-family:var(--ff-disp);font-size:clamp(4rem,9vw,6.5rem);line-height:1;color:var(--rice);
  writing-mode:vertical-rl;
}
.season-en{font-family:var(--ff-mono);font-size:.82rem;letter-spacing:.24em;color:rgba(247,244,236,.6);text-transform:uppercase}
.season-txt h3{font-family:var(--ff-disp);font-size:clamp(1.6rem,3vw,2.2rem);margin:.5rem 0 .9rem}
.season-txt p{color:rgba(247,244,236,.82);font-size:1.02rem;max-width:34rem}

/* ============ ACTIVITIES ============ */
.activities{max-width:var(--wrap);margin:0 auto;padding:clamp(5rem,10vw,8.5rem) var(--gut)}
.act-head{margin-bottom:3.2rem;max-width:46rem}
.act-head h2{font-family:var(--ff-disp);font-size:clamp(2rem,4.5vw,3.3rem);color:var(--ink);margin-bottom:1rem}
.act-head p{color:#535a47}
.act-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.act-card{
  padding:2rem 1.7rem 1.9rem;background:var(--paper-2);border-radius:5px;position:relative;
  border-top:2px solid transparent;transition:transform .4s, border-color .4s, background .4s;
  overflow:hidden;
}
.act-card::after{content:"";position:absolute;left:0;bottom:0;height:0;width:100%;background:var(--rice);opacity:.1;transition:height .45s}
.act-card:hover{transform:translateY(-5px);border-top-color:var(--moss);background:#fff}
.act-card:hover::after{height:5px;opacity:1}
.act-no{font-family:var(--ff-mono);font-size:.85rem;letter-spacing:.15em;color:var(--rice)}
.act-card h3{font-family:var(--ff-disp);font-size:1.28rem;margin:.7rem 0 .7rem;color:var(--soil)}
.act-card p{font-size:.94rem;color:#535a47;line-height:1.72}
.act-card-wide{grid-column:span 3;display:grid;grid-template-columns:auto auto 1fr;gap:.4rem 1.6rem;align-items:center}
.act-card-wide h3{margin:0}
.act-card-wide .act-no{align-self:center}
.act-card-wide p{max-width:44rem}

/* ============ FIELD ============ */
.field{background:var(--moss);color:var(--paper);overflow:hidden}
.field-inner{max-width:var(--wrap);margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:clamp(2rem,5vw,4rem);padding:clamp(4.5rem,9vw,7rem) var(--gut)}
.field-text h2{font-family:var(--ff-disp);font-size:clamp(2rem,4.5vw,3.2rem);margin-bottom:1.3rem}
.field-text p{color:rgba(247,244,236,.85);font-size:1.04rem;max-width:34rem}
.field-meta{display:flex;flex-wrap:wrap;gap:1.8rem;margin-top:2.4rem}
.field-meta dt{font-family:var(--ff-mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:rgba(247,244,236,.6);margin-bottom:.3rem}
.field-meta dd{font-family:var(--ff-disp);font-size:1.05rem}
.field-visual{aspect-ratio:4/3.4;position:relative}
.field-figure{position:absolute;inset:0;margin:0;border-radius:10px;overflow:hidden;box-shadow:0 30px 60px -30px rgba(26,29,22,.7)}
.field-figure img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.field-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(107,122,79,.06) 0%,rgba(46,51,37,.28) 100%);pointer-events:none}
.field-figure:hover img{transform:scale(1.04)}

/* ============ CONTACT ============ */
.contact{max-width:var(--wrap);margin:0 auto;padding:clamp(5rem,10vw,8.5rem) var(--gut)}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(2rem,6vw,5rem);align-items:start}
.contact-lead h2{font-family:var(--ff-disp);font-size:clamp(2rem,4.5vw,3.3rem);color:var(--ink);margin-bottom:1.2rem}
.contact-lead p{color:#535a47;max-width:26rem;margin-bottom:2rem}
.contact-mail{display:inline-flex;flex-direction:column;gap:.2rem;padding:1rem 1.4rem;border:1px solid var(--line);border-radius:4px;transition:.35s}
.contact-mail:hover{background:var(--paper-2);border-color:var(--moss);transform:translateY(-2px)}
.cm-label{font-family:var(--ff-mono);font-size:.7rem;letter-spacing:.24em;text-transform:uppercase;color:var(--moss)}
.cm-addr{font-family:var(--ff-disp);font-size:1.15rem;color:var(--soil)}

.contact-form{display:grid;gap:1.3rem}
.field-row{display:grid;gap:.5rem}
.field-row label{font-size:.86rem;letter-spacing:.05em;color:var(--soil)}
.field-row label span{color:var(--rice)}
.field-row input,.field-row select,.field-row textarea{
  font-family:inherit;font-size:1rem;color:var(--soil);
  padding:.85rem 1rem;background:var(--paper-2);border:1px solid var(--line);border-radius:4px;
  transition:border-color .3s, background .3s, box-shadow .3s;resize:vertical;
}
.field-row input:focus,.field-row select:focus,.field-row textarea:focus{
  outline:none;border-color:var(--moss);background:#fff;box-shadow:0 0 0 3px rgba(107,122,79,.14);
}
.field-row input.invalid,.field-row textarea.invalid{border-color:#B4553E;box-shadow:0 0 0 3px rgba(180,85,62,.12)}
.form-note{font-size:.9rem;min-height:1.3em}
.form-note.ok{color:var(--moss)}
.form-note.err{color:#B4553E}

/* ============ FOOTER ============ */
.site-foot{background:var(--ink);color:var(--paper);padding:clamp(3rem,6vw,4.5rem) var(--gut) 2rem}
.foot-top{max-width:var(--wrap);margin:0 auto;display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap;padding-bottom:2.5rem;border-bottom:1px solid rgba(247,244,236,.14)}
.foot-brand .brand-ja{font-family:var(--ff-disp);font-size:1.15rem}
.foot-brand p{color:rgba(247,244,236,.6);margin-top:.6rem;font-size:.92rem}
.foot-nav{display:flex;gap:1.6rem;flex-wrap:wrap;align-items:center}
.foot-nav a{font-size:.9rem;color:rgba(247,244,236,.8);transition:color .3s}
.foot-nav a:hover{color:var(--rice)}
.foot-base{max-width:var(--wrap);margin:1.8rem auto 0;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.8rem;color:rgba(247,244,236,.5);font-family:var(--ff-mono);letter-spacing:.05em}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .9s ease, transform .9s cubic-bezier(.2,.7,.2,1);transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}
.pc{display:inline}

/* ============ RESPONSIVE ============ */
@media(max-width:920px){
  .phil-grid,.contact-grid,.cycle-stage,.field-inner{grid-template-columns:1fr}
  .field-visual{max-width:480px;order:-1}
  .ring-wrap{max-width:360px;margin:0 auto}
  .act-grid{grid-template-columns:repeat(2,1fr)}
  .act-card-wide{grid-column:span 2}
}
@media(max-width:720px){
  .site-nav{
    position:fixed;inset:0 0 0 auto;width:min(78vw,320px);flex-direction:column;justify-content:center;
    gap:1.6rem;background:var(--paper);padding:2rem;transform:translateX(100%);transition:transform .4s;box-shadow:var(--shadow);
  }
  .site-nav.open{transform:none}
  .nav-toggle{display:flex;z-index:60}
  .nav-toggle.open span:first-child{transform:translateY(3.5px) rotate(45deg)}
  .nav-toggle.open span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
  .pc{display:none}
  .act-grid{grid-template-columns:1fr}
  .act-card-wide{grid-column:span 1;grid-template-columns:1fr}
  .hero-foot-sep{display:none}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important}
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}