:root{
  --green-deep:#064B28;
  --green:#3EA747;
  --green-soft:#eaf4ec;
  --ink:#12201a;
  --ink-soft:#4c5c53;
  --muted:#8b978f;
  --line:#e5eae6;
  --bg:#ffffff;
  --bg-soft:#f6f9f7;
  --radius:18px;
  --header-h:66px;
  --font-ja:"Zen Kaku Gothic New","Hiragino Sans","Hiragino Kaku Gothic ProN",system-ui,sans-serif;
  --font-en:"Inter","Zen Kaku Gothic New",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font-ja);font-weight:400;line-height:1.9;
  letter-spacing:.02em;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .3s ease,box-shadow .3s ease;
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 4px 24px rgba(6,75,40,.04)}
.header-inner{
  max-width:1080px;margin:0 auto;height:var(--header-h);
  padding:0 22px;display:flex;align-items:center;gap:24px;
}
.header-brand{display:flex;align-items:center;opacity:0;transform:translateY(4px);
  transition:opacity .35s ease,transform .35s ease;pointer-events:none}
.site-header.is-stuck .header-brand{opacity:1;transform:none;pointer-events:auto}
.header-logo{height:26px;width:auto}

.tabs{position:relative;display:flex;gap:6px;margin-left:auto;min-width:0;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{
  position:relative;flex:none;padding:10px 16px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--ink-soft);text-decoration:none;white-space:nowrap;
  transition:color .25s ease,background-color .25s ease;
}
.tab:hover{color:var(--green-deep);background:var(--green-soft)}
.tab[aria-selected="true"]{color:var(--green-deep);font-weight:700}
.tab-indicator{
  position:absolute;left:0;bottom:2px;height:2px;width:0;border-radius:2px;
  background:var(--green);transition:transform .38s cubic-bezier(.4,0,.2,1),width .38s cubic-bezier(.4,0,.2,1);
}

/* ---------- hero ---------- */
.hero{
  position:relative;padding:clamp(64px,11vw,132px) 22px clamp(48px,7vw,84px);
  text-align:center;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:auto 50% -30% auto;transform:translateX(50%);
  width:min(880px,120vw);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(62,167,71,.10) 0%,rgba(62,167,71,0) 62%);
  pointer-events:none;
}
.hero-logo{
  position:relative;width:min(500px,74vw);margin:0 auto;
  animation:fadeUp 1s cubic-bezier(.2,.7,.3,1) both;
}
.hero-read{
  position:relative;margin:26px 0 0;font-family:var(--font-en);
  font-size:12px;letter-spacing:.42em;text-indent:.42em;color:var(--muted);font-weight:500;
  animation:fadeUp 1s .12s cubic-bezier(.2,.7,.3,1) both;
}
.hero-tagline{
  position:relative;margin:22px 0 0;font-size:clamp(15px,2.4vw,19px);
  font-weight:500;color:var(--ink-soft);letter-spacing:.06em;
  animation:fadeUp 1s .22s cubic-bezier(.2,.7,.3,1) both;
}
.hero-scroll{margin:clamp(34px,6vw,58px) auto 0;width:1px;height:52px;background:var(--line);position:relative;overflow:hidden}
.hero-scroll span{position:absolute;inset:0;background:var(--green);animation:scrollLine 2.4s ease-in-out infinite}
@keyframes scrollLine{0%{transform:translateY(-100%)}60%,100%{transform:translateY(100%)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

/* ---------- panels ---------- */
.panel{padding:0 22px clamp(80px,12vw,140px)}
.panel[hidden]{display:none}
.panel.is-entering .panel-inner{animation:panelIn .5s cubic-bezier(.2,.7,.3,1) both}
@keyframes panelIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.panel-inner{max-width:960px;margin:0 auto}

.section-head{padding:clamp(28px,5vw,52px) 0 clamp(32px,5vw,56px);border-top:1px solid var(--line)}
.eyebrow{
  margin:0;font-family:var(--font-en);font-size:11px;font-weight:600;
  letter-spacing:.34em;text-indent:.34em;color:var(--green);
}
.section-title{margin:14px 0 0;font-size:clamp(26px,4.4vw,38px);font-weight:700;letter-spacing:.06em;line-height:1.5}
.section-lead{margin:20px 0 0;font-size:15px;color:var(--ink-soft);line-height:2.1}

/* ---------- statements ---------- */
.statements{display:flex;flex-direction:column;gap:clamp(20px,3vw,28px)}
.statement{
  position:relative;padding:clamp(28px,4.4vw,44px);border:1px solid var(--line);border-radius:var(--radius);
  background:var(--bg);overflow:hidden;transition:transform .4s ease,box-shadow .4s ease,border-color .4s ease;
}
.statement::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--green);
  transform:scaleY(0);transform-origin:top;transition:transform .5s cubic-bezier(.2,.7,.3,1);
}
.statement:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(6,75,40,.07);border-color:#dbe6de}
.statement:hover::before{transform:scaleY(1)}
.statement-meta{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.statement-no{font-family:var(--font-en);font-size:12px;font-weight:600;color:var(--green);letter-spacing:.12em}
.statement-label{
  margin:0;font-family:var(--font-en);font-size:clamp(15px,2.2vw,18px);font-weight:600;
  letter-spacing:.2em;color:var(--green-deep);
}
.statement-ja{font-size:12px;color:var(--muted);letter-spacing:.18em}
.statement-body{
  margin:18px 0 0;font-size:clamp(17px,2.8vw,22px);font-weight:500;
  line-height:2;letter-spacing:.05em;color:var(--ink);
}

/* ---------- works ---------- */
.work{
  display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(24px,4vw,44px);
  align-items:center;padding:clamp(24px,3.5vw,36px);
  border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);
}
.work-visual{
  border-radius:14px;overflow:hidden;background:var(--bg-soft);
}
.work-visual img{width:100%;height:100%;object-fit:cover}
.work-head{display:flex;align-items:center;gap:14px}
.work-icon{width:52px;height:52px;border-radius:12px;box-shadow:0 6px 18px rgba(6,75,40,.12)}
.work-category{margin:0;font-family:var(--font-en);font-size:11px;letter-spacing:.22em;color:var(--muted)}
.work-name{margin:4px 0 0;font-size:clamp(20px,3vw,26px);font-weight:700;letter-spacing:.05em;line-height:1.5}
.work-copy{margin:20px 0 0;font-size:15px;line-height:2.1;color:var(--ink-soft)}
.work-points{margin:20px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:9px}
.work-points li{position:relative;padding-left:20px;font-size:14px;color:var(--ink-soft)}
.work-points li::before{
  content:"";position:absolute;left:2px;top:.85em;width:7px;height:7px;border-radius:50%;
  background:var(--green);
}
.work .btn{margin-top:28px}

/* ---------- contact ---------- */
.contact-card{
  padding:clamp(32px,5vw,56px);border:1px solid var(--line);border-radius:var(--radius);
  background:var(--bg-soft);text-align:center;
}
.contact-label{margin:0;font-family:var(--font-en);font-size:11px;font-weight:600;letter-spacing:.3em;color:var(--green)}
.contact-mail{
  margin:14px 0 0;font-family:var(--font-en);font-weight:500;
  font-size:clamp(17px,3.6vw,28px);letter-spacing:.02em;color:var(--green-deep);word-break:break-all;
}
.contact-actions{margin:30px 0 0;display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.contact-note{margin:30px 0 0;font-size:13px;color:var(--muted);line-height:2}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:14px 26px;border:none;border-radius:999px;
  background:var(--green-deep);color:#fff;font-family:var(--font-ja);font-size:14px;font-weight:500;
  letter-spacing:.06em;text-decoration:none;cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.btn:hover{transform:translateY(-2px);background:#0a5f33;box-shadow:0 14px 28px rgba(6,75,40,.22)}
.btn svg{width:18px;height:18px;transition:transform .25s ease}
.btn:hover svg{transform:translateX(3px)}
.btn-ghost{background:transparent;color:var(--green-deep);border:1px solid #cfdfd4}
.btn-ghost:hover{background:#fff;color:var(--green-deep);box-shadow:0 10px 24px rgba(6,75,40,.08)}

/* ---------- language switch ---------- */
.lang-switch{
  flex:none;margin-left:16px;display:inline-flex;align-items:center;gap:7px;
  padding:8px 15px;border:1px solid var(--line);border-radius:999px;background:#fff;
  font-family:var(--font-en);font-size:12px;font-weight:600;letter-spacing:.1em;
  color:var(--green-deep);cursor:pointer;white-space:nowrap;
  transition:border-color .25s ease,background-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.lang-switch svg{width:14px;height:14px;opacity:.8;flex:none}
.lang-switch:hover{border-color:var(--green);background:var(--green-soft);box-shadow:0 8px 18px rgba(6,75,40,.07)}
.lang-switch:active{transform:scale(.96)}
.lang-switch.is-pulsing{animation:langPulse .45s cubic-bezier(.2,.7,.3,1)}
@keyframes langPulse{0%{transform:scale(1)}45%{transform:scale(.92)}100%{transform:scale(1)}}

/* ---------- english typography ---------- */
.lang-en{font-family:var(--font-en);letter-spacing:.005em;line-height:1.75}
.lang-en .hero-tagline{letter-spacing:.01em}
.lang-en .section-title{letter-spacing:.01em}
.lang-en .section-lead{letter-spacing:.005em;line-height:1.85}
.lang-en .statement-body{letter-spacing:.005em;line-height:1.65;font-size:clamp(18px,2.9vw,23px)}
.lang-en .statement-ja{letter-spacing:.08em;text-transform:none}
.lang-en .work-copy,
.lang-en .work-points li{letter-spacing:.005em;line-height:1.8}
.lang-en .contact-note{letter-spacing:.005em;line-height:1.8}
.lang-en .btn{letter-spacing:.02em}
.lang-en .tab{letter-spacing:.03em}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);padding:clamp(44px,6vw,64px) 22px;text-align:center;
}
.footer-logo{width:96px;margin:0 auto;opacity:.9}
.footer-mail{margin:20px 0 0;font-family:var(--font-en);font-size:13px;color:var(--ink-soft)}
.footer-mail a{text-decoration:none;border-bottom:1px solid var(--line);padding-bottom:2px}
.footer-mail a:hover{color:var(--green-deep);border-bottom-color:var(--green)}
.footer-copy{margin:18px 0 0;font-family:var(--font-en);font-size:11px;letter-spacing:.24em;color:var(--muted)}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:32px;transform:translate(-50%,16px);
  padding:12px 22px;border-radius:999px;background:var(--green-deep);color:#fff;
  font-size:13px;letter-spacing:.06em;opacity:0;pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;z-index:80;
}
.toast.is-visible{opacity:1;transform:translate(-50%,0)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(20px)}
.reveal.is-visible{opacity:1;transform:none;transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}

.pc-br{display:inline}
.sp-br{display:none}

@media (max-width:860px){
  .work{grid-template-columns:1fr}
  .work-visual{max-width:420px;margin:0 auto}
}
@media (max-width:640px){
  .header-inner{height:auto;padding:11px 14px 0;gap:8px;flex-wrap:wrap}
  .header-logo{height:22px}
  /* on small screens the tabs move to their own row so nothing gets cut off */
  .header-brand{opacity:1;transform:none;pointer-events:auto;order:1}
  .lang-switch{order:2;margin-left:auto;padding:7px 12px;font-size:11px;gap:5px}
  .lang-switch svg{width:12px;height:12px}
  .tabs{order:3;flex-basis:100%;margin:8px -14px 0;padding:0 14px 2px;justify-content:center}
  .tab{padding:9px 10px;font-size:12.5px}
  .tab-indicator{bottom:0}
  .panel{padding:0 18px 88px}
  .hero{padding-top:52px}
  .pc-br{display:none}
  .sp-br{display:inline}
  .statement-body{font-size:17px}
  .contact-actions .btn{width:100%;justify-content:center}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}