:root{
  --ink:#1d4a34;
  --paper:#eef8ee;
  --white:#ffffff;
  --green:#d9efcf;
  --sky:#e6f5e7;
  --pink:#edf6e9;
  --yellow:#f0f7df;
  --mint:#e0f2df;
  --orange:#e8f2d8;
  --purple:#e8f2e5;
  --line:#2c5b41;
  --soft:#e4f2e3;
  --shadow:0 7px 0 rgba(45,91,65,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:var(--paper);
  font-family:ui-rounded,"Hiragino Maru Gothic ProN","Yu Gothic",system-ui,sans-serif;
  line-height:1.7;
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
img{max-width:100%}
.wrap{width:min(1160px,calc(100% - 28px));margin:auto}

.site-header{
  position:sticky;top:0;z-index:40;
  background:rgba(238,248,238,.96);
  backdrop-filter:blur(12px);
  border-bottom:2px solid rgba(23,55,44,.10);
}
.nav{
  min-height:72px;
  display:flex;align-items:center;gap:14px;
}
.brand{display:flex;align-items:center;flex:0 0 auto}


.main-nav{margin-left:auto;display:flex;gap:6px;align-items:center}
.main-nav a{
  min-height:42px;
  display:flex;align-items:center;
  padding:9px 13px;
  border-radius:999px;
  font-size:14px;font-weight:1000;
}
.main-nav a:hover{background:#fff}
.member-link{
  background:var(--ink)!important;color:#fff!important;
  border:2px solid var(--ink);
}
.menu-btn{
  display:none;margin-left:auto;
  border:2px solid var(--line);background:#fff;
  border-radius:14px;padding:8px 11px;font-weight:1000;
}

.hero{padding:22px 0 0}
.hero-shell{
  position:relative;min-height:500px;
  border:2px solid var(--line);
  border-radius:34px;
  overflow:hidden;
  box-shadow:var(--shadow);
}
.hero-slide{
  position:absolute;inset:0;
  display:none;
  grid-template-columns:1.08fr .92fr;
  align-items:center;gap:28px;
  padding:48px;
}
.hero-slide.active{display:grid}
.hero-slide:nth-child(1){background:#e3f3e2}
.hero-slide:nth-child(2){background:#e8f5e6}
.hero-slide:nth-child(3){background:#deefdc}
.hero-copy{position:relative;z-index:2}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;
  border:2px solid var(--line);border-radius:999px;
  background:#fff;
  box-shadow:3px 3px 0 var(--line);
  font-size:13px;font-weight:1000;
}
.hero h1{
  font-size:clamp(44px,7vw,76px);
  line-height:1.03;
  letter-spacing:-.05em;
  margin:20px 0 14px;
}
.hero p{
  max-width:560px;
  font-size:18px;
  line-height:1.85;
  font-weight:800;
}
.big-button{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:14px;padding:15px 20px;
  border:2px solid var(--line);border-radius:999px;
  background:var(--ink);color:#fff;
  box-shadow:4px 4px 0 var(--line);
  font-weight:1000;font-size:16px;
}
.hero-image{
  width:100%;max-height:360px;object-fit:contain;
}
.hero-controls{
  position:absolute;left:48px;bottom:26px;z-index:6;
  display:flex;align-items:center;gap:8px;
}
.hero-controls button{
  border:2px solid var(--line);background:#fff;
  cursor:pointer;
}
.hero-controls .dot{
  width:14px;height:14px;padding:0;border-radius:50%;
}
.hero-controls .dot.active{background:var(--ink)}
.hero-controls .next{
  width:40px;height:40px;border-radius:50%;font-weight:1000;
}

.section{
  width:min(1160px,calc(100% - 28px));
  margin:auto;
  padding:48px 0;
}
.section-head{
  display:flex;align-items:end;justify-content:space-between;
  gap:16px;margin-bottom:18px;
}
.section-kicker{
  font-size:12px;font-weight:1000;letter-spacing:.10em;
  opacity:.55;
}
.section h2{
  margin:4px 0 0;
  font-size:clamp(30px,4vw,44px);
  line-height:1.1;letter-spacing:-.04em;
}
.more-link{
  font-size:14px;font-weight:1000;
  border-bottom:2px solid var(--line);
  white-space:nowrap;
}

/* environment news */
.news-list{
  border:2px solid var(--line);
  border-radius:26px;
  background:#fff;
  padding:6px 20px;
  box-shadow:6px 7px 0 rgba(23,55,44,.08);
}
.news-item{
  display:grid;
  grid-template-columns:95px 1fr 28px;
  gap:14px;
  align-items:start;
  padding:17px 0;
  border-top:1px solid rgba(23,55,44,.14);
}
.news-item:first-child{border-top:0}
.news-item time{
  padding-top:3px;
  font-size:12px;font-weight:1000;opacity:.55;
}
.news-item h3{
  margin:0 0 6px;
  font-size:18px;line-height:1.45;
}
.news-item p{
  margin:0;
  font-size:14px;line-height:1.7;
  font-weight:700;opacity:.68;
}
.news-arrow{font-size:20px;font-weight:1000}

/* encyclopedia entry */
.book-entry{
  min-height:410px;
  display:grid;grid-template-columns:1fr 1fr;
  padding:22px;
  border:2px solid var(--line);
  border-radius:34px;
  background:#e2f0df;
  box-shadow:var(--shadow);
}
.book-copy{
  display:flex;flex-direction:column;justify-content:center;
  padding:34px;
  background:#fffaf0;
  border:2px solid var(--line);border-right:0;
  border-radius:28px 0 0 28px;
}
.book-copy small{
  font-size:12px;font-weight:1000;letter-spacing:.08em;opacity:.55
}
.book-copy h3{
  margin:10px 0 12px;
  font-size:clamp(38px,5vw,62px);
  line-height:1;letter-spacing:-.05em;
}
.book-copy p{
  max-width:460px;
  font-size:17px;font-weight:800;line-height:1.85;
}
.book-copy strong{
  display:inline-flex;margin-top:8px;font-size:17px;
}
.book-art{
  display:grid;place-items:center;
  background:#fffaf0;
  border:2px solid var(--line);
  border-left:1px solid rgba(23,55,44,.16);
  border-radius:0 28px 28px 0;
}


/* pickup */
.pickup-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
}
.pickup-card{
  min-height:200px;
  display:flex;flex-direction:column;justify-content:space-between;
  padding:22px;
  border:2px solid var(--line);
  border-radius:25px;
  box-shadow:6px 7px 0 rgba(23,55,44,.09);
}
.pickup-card:nth-child(1){background:#dff0dc}
.pickup-card:nth-child(2){background:#e6f4e5}
.pickup-card:nth-child(3){background:#edf7eb}
.pickup-card small{
  font-size:12px;font-weight:1000;opacity:.58
}
.pickup-card h3{
  margin:7px 0;
  font-size:25px;line-height:1.2;
}
.pickup-card p{
  margin:0;
  font-size:14px;font-weight:700;line-height:1.65;
}
.pickup-card b{font-size:22px}

/* mixed contents */
.content-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.content-card{
  overflow:hidden;
  border:2px solid var(--line);
  border-radius:23px;
  background:#fff;
  box-shadow:5px 6px 0 rgba(23,55,44,.08);
}
.content-card img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  background:#eee;border-bottom:2px solid var(--line);
}
.content-body{padding:15px}
.content-type{
  display:inline-block;
  padding:4px 8px;
  border-radius:999px;
  background:var(--soft);
  font-size:11px;font-weight:1000;
}
.content-body h3{
  margin:8px 0 6px;
  font-size:18px;line-height:1.35;
}
.content-body p{
  margin:0;
  font-size:13px;line-height:1.65;
  font-weight:700;opacity:.66;
}

/* kids */
.kids-entry{
  display:grid;grid-template-columns:1fr 1fr;gap:26px;
  align-items:center;
  padding:34px;
  border:2px solid var(--line);
  border-radius:34px;
  background:#dceedd;color:var(--ink);
}
.kids-entry h2{
  margin:5px 0 10px;
  font-size:clamp(32px,5vw,52px);
}
.kids-entry p{
  font-size:16px;line-height:1.8;
  font-weight:700;color:rgba(29,74,52,.78)
}
.kids-entry img{width:100%;max-height:300px;object-fit:contain}

/* footer */
.site-footer{
  margin-top:28px;
  background:#d7ead6;color:var(--ink);
}
.footer-main{
  display:grid;
  grid-template-columns:1.2fr .9fr 1fr;
  gap:28px;
  padding:42px 0 32px;
}
.footer-main h3{
  margin:0 0 10px;font-size:18px;
}
.footer-main p{
  margin:0;font-size:14px;line-height:1.8;
  color:rgba(29,74,52,.78)
}
.footer-links{
  display:grid;gap:10px;align-content:start;
}
.footer-links a{
  font-weight:900;
  text-decoration:underline;
  text-underline-offset:4px;
}
.qr-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
}
.qr-item{
  text-align:center;
  font-size:11px;font-weight:900;
}
.qr-item img{
  width:100%;aspect-ratio:1;object-fit:contain;
  background:#fff;padding:6px;border-radius:10px;
}
.footer-bottom{
  border-top:1px solid rgba(29,74,52,.18);
  padding:16px 0 24px;
  display:flex;justify-content:space-between;gap:16px;
  font-size:12px;color:rgba(29,74,52,.72)
}
.footer-bottom a{text-decoration:underline}

@media(max-width:940px){
  .main-nav{display:none}
  .menu-btn{display:block}
  .hero-shell{min-height:650px}
  .hero-slide.active{grid-template-columns:1fr}
  .hero-image{max-height:230px}
  .pickup-grid{grid-template-columns:1fr}
  .content-grid{grid-template-columns:repeat(2,1fr)}
  .book-entry,.kids-entry{grid-template-columns:1fr}
  .book-copy{border-right:2px solid var(--line);border-radius:28px 28px 0 0}
  .book-art{border-left:2px solid var(--line);border-radius:0 0 28px 28px;padding:30px}
  .footer-main{grid-template-columns:1fr 1fr}
  .footer-sns{grid-column:1/-1}
}
@media(max-width:580px){
  .wrap,.section{width:min(100% - 20px,1160px)}
  .hero{padding-top:12px}
  .hero-shell{min-height:675px;border-radius:26px}
  .hero-slide{padding:24px 20px}
  .hero h1{font-size:46px}
  .hero p{font-size:16px}
  .hero-controls{left:20px;bottom:18px}
  .news-item{grid-template-columns:72px 1fr 20px}
  .news-item h3{font-size:16px}
  .content-grid{grid-template-columns:1fr}
  .section-head{align-items:flex-start}
  .footer-main{grid-template-columns:1fr}
  .footer-sns{grid-column:auto}
  .qr-grid{max-width:320px}
  .footer-bottom{flex-direction:column}
}

.site-logo{display:block;width:220px;height:auto;max-height:50px;object-fit:contain;object-position:left center}

.book-entry-image{width:100%;height:100%;max-height:330px;object-fit:contain;padding:18px}


/* 2026-09 requested updates */
ruby rt{font-size:.48em;font-weight:700}.nav{min-height:92px}.site-logo{width:320px;max-height:82px}.hero-shell{min-height:540px}.hero-slide{color:inherit;text-decoration:none;cursor:pointer}.hero-click-note{display:inline-flex;margin-top:12px;font-size:14px;font-weight:1000;border-bottom:2px solid var(--line)}.hero-image{max-height:390px}.project-core{padding-top:24px}.project-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:22px;align-items:center;border:2px solid var(--line);border-radius:30px;background:#fff;padding:28px;box-shadow:6px 7px 0 rgba(23,55,44,.08)}.project-grid p{font-size:16px;font-weight:750}.project-grid img{border-radius:20px}.project-apply{display:inline-flex;margin-top:12px;padding:13px 18px;border:2px solid var(--line);border-radius:999px;background:var(--ink);color:#fff;font-weight:1000}.project-apply.disabled{background:#829589;border-color:#829589}.form-note{display:block;margin-top:8px;max-width:560px;opacity:.62}.pickup-grid{grid-template-columns:repeat(2,1fr)}.content-grid-rtl{direction:rtl}.content-grid-rtl .content-card{direction:ltr}.content-body time{display:block;font-size:12px;font-weight:900;opacity:.55;margin-top:7px}.main-nav.open{display:flex}.book-entry-image{max-height:390px;padding:0;border-radius:20px}@media(max-width:940px){.project-grid{grid-template-columns:1fr}.main-nav.open{position:absolute;top:88px;right:14px;left:14px;display:grid;background:#fff;border:2px solid var(--line);border-radius:20px;padding:10px;box-shadow:5px 7px 0 rgba(23,55,44,.12)}.main-nav.open a{display:flex}.site-logo{width:280px}.hero-shell{min-height:610px}}@media(max-width:580px){.nav{min-height:76px}.site-logo{width:220px;max-height:66px}.hero-shell{min-height:570px}.hero-slide{padding:20px}.hero h1{font-size:38px}.hero-image{max-height:210px}.pickup-grid{grid-template-columns:1fr}.project-grid{padding:18px}}


/* 2026-09-01 corrected follow-up */
.nav{min-height:84px;flex-wrap:nowrap;white-space:nowrap}
.brand{display:flex;align-items:center;gap:10px;min-width:0;flex:0 0 auto;white-space:nowrap}
.brand-characters{display:block;width:62px;height:62px;object-fit:contain;flex:0 0 auto;border-radius:16px}
.site-logo{display:block;width:210px;height:auto;max-height:62px;object-fit:contain;object-position:left center;flex:0 0 auto}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:3px;flex-wrap:nowrap;white-space:nowrap;min-width:0}
.main-nav a{padding:8px 10px;font-size:13px;white-space:nowrap}
.hero{padding:22px 0 0}
.hero-shell{position:relative;width:100%;aspect-ratio:1672/941;min-height:0!important;border:2px solid var(--line);border-radius:34px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.hero-slide{position:absolute;inset:0;display:none!important;padding:0!important;background:#fff!important;cursor:pointer;overflow:hidden}
.hero-slide.active{display:block!important}
.hero-slide::after{content:"";position:absolute;inset:0;background:rgba(255,255,255,0);transition:background .18s ease;pointer-events:none}
@media (hover:hover) and (pointer:fine){.hero-slide:hover::after{background:rgba(255,255,255,.12)}}
.hero-image{display:block;width:100%;height:100%;max-height:none!important;object-fit:cover;margin:0;padding:0}
.hero-controls{position:absolute;right:16px;left:auto!important;bottom:14px;z-index:8;display:flex;align-items:center;gap:7px;padding:7px 9px;border-radius:999px;background:rgba(255,255,255,.86);box-shadow:0 2px 10px rgba(29,74,52,.12);backdrop-filter:blur(5px)}
.hero-controls .dot{width:13px;height:13px}.hero-controls .next{width:36px;height:36px}
.content-grid-rtl{direction:ltr}.content-grid-rtl .content-card{direction:ltr}
.event-monster-section{padding-bottom:58px}
.event-monster-entry{position:relative;display:grid;grid-template-columns:1.03fr .97fr;min-height:390px;overflow:hidden;border:2px solid var(--line);border-radius:34px;background:linear-gradient(135deg,#dff1dc,#f5fbef);box-shadow:7px 9px 0 rgba(23,55,44,.09)}
.event-monster-copy{position:relative;z-index:2;display:flex;flex-direction:column;justify-content:center;padding:clamp(28px,5vw,56px)}
.event-monster-label{align-self:flex-start;padding:7px 11px;border:2px solid var(--line);border-radius:999px;background:#fff;font-size:12px;font-weight:1000;box-shadow:3px 3px 0 rgba(44,91,65,.12)}
.event-monster-copy h3{margin:14px 0 12px;font-size:clamp(34px,4.4vw,54px);line-height:1.08;letter-spacing:-.045em}
.event-monster-copy p{max-width:580px;margin:0 0 14px;font-size:16px;line-height:1.8;font-weight:750;color:rgba(29,74,52,.78)}
.event-monster-copy strong{font-size:17px}
.event-monster-preview{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;align-content:center;padding:32px;background:radial-gradient(circle at center,#fff 0,#e8f5e5 66%,#d6ebd3 100%)}
.event-monster-preview img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:24px;border:2px solid var(--line);background:#fff;box-shadow:5px 7px 0 rgba(29,74,52,.09)}
.event-monster-preview img:nth-child(2),.event-monster-preview img:nth-child(4){transform:translateY(18px)}
@media(max-width:940px){
  .main-nav{display:none}.menu-btn{display:block}
  .brand-characters{width:54px;height:54px}.site-logo{width:190px;max-height:56px}
  .event-monster-entry{grid-template-columns:1fr}.event-monster-preview{grid-template-columns:repeat(4,1fr);padding:24px}.event-monster-preview img:nth-child(2),.event-monster-preview img:nth-child(4){transform:none}
}
@media(max-width:580px){
  .nav{min-height:70px}.brand{gap:7px}.brand-characters{width:43px;height:43px;border-radius:12px}.site-logo{width:158px;max-height:48px}
  .hero{padding-top:12px}.hero-shell{border-radius:24px}.hero-controls{right:10px;bottom:9px;padding:5px 7px}.hero-controls .next{width:32px;height:32px}
  .event-monster-entry{border-radius:26px}.event-monster-copy{padding:24px 20px}.event-monster-copy h3{font-size:34px}.event-monster-preview{grid-template-columns:repeat(2,1fr);gap:10px;padding:18px}.event-monster-preview img{border-radius:18px}
}

/* Project image lightbox */
.project-image-button{position:relative;display:block;width:100%;padding:0;border:0;background:transparent;border-radius:20px;overflow:hidden;cursor:zoom-in;text-align:inherit}
.project-image-button img{display:block;width:100%;height:auto;border-radius:20px;transition:filter .18s ease,transform .18s ease}
.project-image-button:hover img,.project-image-button:focus-visible img{filter:brightness(1.06);transform:scale(1.006)}
.project-image-button:focus-visible{outline:3px solid var(--line);outline-offset:4px}
.project-image-hint{position:absolute;right:12px;bottom:12px;padding:6px 10px;border-radius:999px;background:rgba(255,255,255,.92);border:1px solid rgba(44,91,65,.35);font-size:12px;font-weight:1000;line-height:1.2;pointer-events:none}
.image-lightbox[hidden]{display:none}
.image-lightbox{position:fixed;left:0;top:0;z-index:1000;display:grid;place-items:center;width:100vw;height:100vh;padding:0;overflow:hidden}
.image-lightbox-backdrop{position:absolute;inset:0;background:rgba(7,20,13,.88);cursor:zoom-out}
.image-lightbox-dialog{position:relative;z-index:1;width:100%;height:100%;min-width:0;min-height:0;display:flex;align-items:center;justify-content:center;overflow:hidden}
.image-lightbox-dialog img{display:block;width:auto;height:auto;max-width:none;max-height:none;object-fit:contain;border-radius:12px;filter:drop-shadow(0 18px 28px rgba(0,0,0,.35))}
.image-lightbox-close{position:absolute;top:max(8px,env(safe-area-inset-top));right:max(8px,env(safe-area-inset-right));z-index:3;width:48px;height:48px;border:2px solid #fff;border-radius:50%;background:rgba(17,38,27,.88);color:#fff;font-size:30px;line-height:1;cursor:pointer}
.lightbox-open{overflow:hidden}
@media(max-width:580px){.project-image-hint{right:8px;bottom:8px;font-size:11px}.image-lightbox{padding:8px}.image-lightbox-close{width:42px;height:42px;font-size:26px}}


/* Play & Learn */
.play-section{padding-top:34px}
.play-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.play-card{display:grid;grid-template-rows:auto 1fr;overflow:hidden;border:2px solid var(--line);border-radius:24px;background:#fff;box-shadow:5px 6px 0 rgba(23,55,44,.08);transition:transform .18s ease,box-shadow .18s ease}
.play-card:hover{transform:translateY(-3px);box-shadow:6px 9px 0 rgba(23,55,44,.10)}
.play-card-visual{position:relative;display:grid;place-items:center;aspect-ratio:4/3;overflow:hidden;border-bottom:2px solid var(--line);background:radial-gradient(circle at 35% 28%,#fffbd7 0 12%,transparent 13%),linear-gradient(145deg,#f4f7b7,#d9efcf 55%,#c7e9dc)}
.play-card-visual::before,.play-card-visual::after{content:'';position:absolute;border:2px solid rgba(29,74,52,.24);border-radius:50%}
.play-card-visual::before{width:44%;aspect-ratio:1;left:-8%;bottom:-20%}
.play-card-visual::after{width:30%;aspect-ratio:1;right:-4%;top:-12%}
.play-card-mark{position:relative;z-index:2;display:grid;place-items:center;width:clamp(76px,9vw,116px);aspect-ratio:1;border:3px solid var(--line);border-radius:50%;background:#fff;color:var(--ink);box-shadow:6px 7px 0 rgba(29,74,52,.13);font-size:clamp(48px,6vw,78px);font-weight:1000;line-height:1}
.play-card-mini{position:absolute;right:14px;bottom:12px;z-index:2;padding:5px 10px;border:2px solid var(--line);border-radius:999px;background:#fff;font-size:11px;font-weight:1000}
.play-card-body{display:flex;flex-direction:column;padding:16px}
.play-card-body h3{margin:8px 0 6px;font-size:21px;line-height:1.3}
.play-card-body p{margin:0 0 12px;font-size:13px;line-height:1.7;font-weight:700;opacity:.7}
.play-card-body strong{margin-top:auto;font-size:14px}
@media(max-width:940px){.play-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:580px){.play-grid{grid-template-columns:1fr}.play-card{grid-template-columns:40% 1fr;grid-template-rows:1fr}.play-card-visual{aspect-ratio:auto;min-height:180px;border-bottom:0;border-right:2px solid var(--line)}.play-card-mark{width:82px;font-size:52px}}


/* Header menu: expanded sections, keep one line on desktop */
.main-nav{gap:2px;flex-wrap:nowrap;white-space:nowrap}
.main-nav a{padding:8px 8px;font-size:12px;white-space:nowrap;flex:0 0 auto}
@media(max-width:940px){
  .main-nav{display:none}
  .main-nav.open{display:grid}
}