*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f2f3f5;
  --panel:#f7f7f8;
  --ink:#252933;
  --muted:#747987;
  --line:#cbd0da;
  --line2:#dfe2e8;
  --accent:#8f91aa;
  --accent-soft:#e9e9f0;
  --sans:"Helvetica Neue","Yu Gothic","Hiragino Kaku Gothic ProN","Noto Sans CJK JP",Arial,sans-serif;
  --serif:Georgia,"Times New Roman","Yu Mincho","Hiragino Mincho ProN",serif;
  --mono:Menlo,Monaco,Consolas,"Liberation Mono",monospace;
}
html{scroll-behavior:smooth}
body{
  min-height:100vh;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-weight:300;
}
body:before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:50;opacity:.045;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.72' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
button,a{font:inherit}
button{color:inherit}
.site-shell{width:min(1180px,calc(100% - 48px));margin:auto}
.site-header{
  height:92px;border-bottom:1px solid var(--line);display:flex;align-items:center;
  justify-content:space-between;position:sticky;top:0;z-index:15;background:rgba(242,243,245,.92);
  backdrop-filter:blur(12px);
}
.brand{text-decoration:none;color:var(--ink);display:flex;align-items:baseline;gap:16px}
.brand-main{font-family:var(--serif);font-size:23px;letter-spacing:-.025em}
.brand-sub{font:9px var(--mono);letter-spacing:.12em;color:var(--muted)}
.main-nav{display:flex;gap:28px}
.main-nav button{
  border:0;background:none;cursor:pointer;font:9px var(--mono);letter-spacing:.12em;
  padding:8px 0;position:relative;
}
.main-nav button:after{
  content:"";position:absolute;left:0;right:100%;bottom:3px;height:1px;background:var(--accent);
  transition:.22s ease;
}
.main-nav button:hover:after{right:0}

.hero{min-height:650px;border-bottom:1px solid var(--line);padding:58px 0 36px;position:relative}
.hero-code{font:9px var(--mono);letter-spacing:.16em;color:var(--muted)}
.hero-main{
  min-height:500px;display:grid;grid-template-columns:minmax(0,1fr) 280px;
  gap:80px;align-items:center;
}
.eyebrow{font:9px var(--mono);letter-spacing:.16em;color:var(--accent);margin-bottom:23px}
.hero h1{
  font-family:var(--serif);font-weight:400;font-size:clamp(72px,10vw,132px);
  line-height:.72;letter-spacing:-.075em;
}
.hero h1 span{font-style:italic;color:#6f7288}
.hero-note{
  margin-top:48px;font:9px/1.85 var(--mono);letter-spacing:.08em;color:var(--muted);
}
.hero-mark{
  width:250px;height:340px;border:1px solid var(--line);position:relative;display:flex;
  align-items:center;justify-content:center;background:rgba(255,255,255,.16);
}
.hero-mark:before,.hero-mark:after{
  content:"";position:absolute;background:var(--accent);
}
.hero-mark:before{width:1px;height:calc(100% + 30px);left:32px;top:-15px;opacity:.45}
.hero-mark:after{height:1px;width:calc(100% + 30px);left:-15px;top:62px;opacity:.45}
.hero-mark span{font:italic 132px/.8 var(--serif);color:rgba(143,145,170,.18)}
.hero-mark i{
  position:absolute;width:52px;height:52px;border:1px solid var(--accent);border-radius:50%;
  right:26px;bottom:34px;
}
.hero-mark i:before,.hero-mark i:after{
  content:"";position:absolute;left:50%;top:50%;background:var(--accent);transform:translate(-50%,-50%);
}
.hero-mark i:before{width:74px;height:1px}.hero-mark i:after{height:74px;width:1px}
.hero-mark small{position:absolute;left:18px;bottom:18px;font:8px var(--mono);letter-spacing:.12em;color:var(--muted)}
.hero-bottom{
  display:flex;justify-content:space-between;border-top:1px solid var(--line2);padding-top:16px;
  font:8px var(--mono);letter-spacing:.12em;color:var(--muted)
}

.voice-area,.update-section,.about,.terms{padding:105px 0 120px;border-bottom:1px solid var(--line)}
.section-head{
  display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:56px
}
.section-index{font:8px var(--mono);letter-spacing:.14em;color:var(--accent);margin-bottom:13px}
.section-head h2{
  font-family:var(--serif);font-weight:400;font-size:52px;line-height:.85;letter-spacing:-.045em
}
.section-caption{font:8px var(--mono);letter-spacing:.09em;color:var(--muted);padding-bottom:4px}

.voice-grid{border-top:1px solid var(--ink)}
.voice-card{
  width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;cursor:pointer;
  min-height:126px;text-align:left;display:grid;grid-template-columns:90px minmax(180px,1.1fr) 1fr 40px;
  align-items:center;padding:0 12px 0 0;position:relative;transition:.18s ease
}
.voice-card:hover{background:rgba(143,145,170,.075);padding-left:10px}
.voice-no{font:8px var(--mono);letter-spacing:.12em;color:var(--muted)}
.voice-name{font-family:var(--serif);font-size:30px;letter-spacing:-.025em}
.voice-meta{font:9px/1.75 var(--mono);letter-spacing:.05em;color:var(--muted)}
.voice-arrow{font:28px/1 var(--serif);color:var(--accent);transition:.2s}
.voice-card:hover .voice-arrow{transform:translateX(6px)}

.update-list{border-top:1px solid var(--ink)}
.update-entry{
  display:grid;grid-template-columns:145px 1fr;gap:30px;padding:22px 0;border-bottom:1px solid var(--line)
}
.update-date{font:9px var(--mono);letter-spacing:.1em;color:var(--accent)}
.update-text{font-size:12px;line-height:1.7;letter-spacing:.02em}

.lang-switch{display:flex;gap:7px}
.lang,.about-lang,.variant-btn{
  min-width:40px;border:1px solid var(--line);background:transparent;cursor:pointer;
  font:8px var(--mono);letter-spacing:.08em;padding:6px 10px;transition:.15s
}
.lang:hover,.about-lang:hover,.variant-btn:hover{border-color:var(--accent)}
.lang.active,.about-lang.active,.variant-btn.active{background:var(--ink);border-color:var(--ink);color:var(--bg)}

.about-copy{
  width:min(680px,76%);margin-left:18%;font-family:var(--serif);font-size:14px;line-height:2.05;
  letter-spacing:.01em
}
.about-copy p{margin-bottom:22px}
.about-copy .welcome{font-size:17px;line-height:1.9}
.about-copy .aside{
  font:8px/1.8 var(--mono);letter-spacing:.1em;color:var(--muted);border-top:1px solid var(--line);
  margin-top:42px;padding-top:14px
}

.terms-frame{
  width:min(760px,82%);margin-left:18%;border-left:1px solid var(--accent);
  padding-left:28px;position:relative
}
.terms-frame:before{
  content:"POLICY / READ BEFORE USE";position:absolute;left:-5px;top:0;transform:translateX(-100%) rotate(-90deg);
  transform-origin:right top;font:7px var(--mono);letter-spacing:.12em;color:var(--accent)
}
.terms-copy{
  max-height:590px;overflow-y:auto;padding:0 22px 20px 0;
  font-size:11px;line-height:1.9;scrollbar-width:thin;scrollbar-color:var(--accent) transparent
}
.terms-copy::-webkit-scrollbar{width:3px}.terms-copy::-webkit-scrollbar-thumb{background:var(--accent)}
.terms-copy h3{
  font-size:11px;font-weight:500;letter-spacing:.03em;margin:28px 0 9px;color:#5e6175
}
.terms-copy p{margin-bottom:15px}
.terms-copy .notice,.terms-copy .credit-note{
  background:rgba(143,145,170,.07);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:13px 15px;margin-bottom:20px
}

footer{
  min-height:115px;display:flex;justify-content:space-between;align-items:center;
  font:8px var(--mono);letter-spacing:.12em;color:var(--muted)
}

/* detail */
.modal{
  position:fixed;inset:0;z-index:30;background:rgba(242,243,245,.985);color:var(--ink);
  opacity:0;visibility:hidden;transition:.22s ease;overflow:auto
}
.modal.open{opacity:1;visibility:visible}
.modal-close{
  position:fixed;right:30px;top:25px;z-index:40;border:1px solid var(--line);background:var(--bg);
  font:8px var(--mono);letter-spacing:.1em;padding:8px 12px;cursor:pointer
}
.modal-inner{width:min(1040px,calc(100% - 70px));margin:95px auto 120px}
.modal-header{
  border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:22px 0 24px;
  display:flex;justify-content:space-between;gap:45px;align-items:flex-end
}
.modal-index{font:8px var(--mono);letter-spacing:.14em;color:var(--accent);margin-bottom:14px}
.modal-inner h2{
  font-family:var(--serif);font-size:56px;font-weight:400;letter-spacing:-.05em;line-height:.9
}
.modal-side{text-align:right;display:flex;flex-direction:column;align-items:flex-end;gap:13px}
.variant-switch{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.variant-btn{min-width:0}
.modal-type{font:8px var(--mono);letter-spacing:.08em;color:var(--muted)}
.modal-grid{
  display:grid;grid-template-columns:minmax(360px,1.12fr) minmax(320px,.88fr);gap:70px;padding-top:54px
}
.modal-art{
  min-height:620px;position:sticky;top:80px;align-self:start;display:flex;align-items:center;
  justify-content:center;border:0;background:linear-gradient(180deg,rgba(255,255,255,.16),rgba(143,145,170,.035))
}
.modal-art:before{
  content:"";position:absolute;left:0;top:0;width:88px;height:1px;background:var(--accent)
}
.modal-art:after{
  content:"";position:absolute;right:0;bottom:0;width:1px;height:88px;background:var(--accent)
}
.modal-art img{width:100%;height:570px;object-fit:contain;filter:none!important;-webkit-filter:none!important}
.target-label{
  position:absolute;left:0;top:14px;z-index:2;font:8px var(--mono);letter-spacing:.12em;color:var(--accent)
}
.art-meta{
  position:absolute;bottom:14px;left:0;font:7px var(--mono);letter-spacing:.12em;color:var(--muted)
}
.modal-content{font-size:11px;line-height:1.8}
.modal-content .block{border-top:1px solid var(--line);padding:17px 0 20px}
.modal-content .block:first-child{border-top:1px solid var(--ink)}
.modal-content .label{
  display:block;font:7px var(--mono);letter-spacing:.14em;color:var(--accent);margin-bottom:10px
}
.modal-content b{font-weight:500}
.modal-content audio{width:100%;margin-top:8px;height:34px}
.download{
  display:flex;justify-content:space-between;align-items:center;color:var(--ink);text-decoration:none;
  border:1px solid var(--ink);padding:13px 14px;font:9px var(--mono);letter-spacing:.1em;transition:.15s
}
.download:hover{background:var(--ink);color:var(--bg)}
.download small{font-size:7px;opacity:.7;max-width:58%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

@media(max-width:800px){
  .site-shell{width:min(100% - 28px,680px)}
  .site-header{height:76px}.brand-sub{display:none}.brand-main{font-size:19px}
  .main-nav{gap:12px}.main-nav button{font-size:7px}
  .hero{min-height:560px;padding-top:38px}
  .hero-main{grid-template-columns:1fr 150px;gap:25px;min-height:430px}
  .hero h1{font-size:clamp(60px,16vw,96px)}
  .hero-mark{width:140px;height:260px}.hero-mark span{font-size:90px}
  .hero-bottom{font-size:6px}
  .voice-area,.update-section,.about,.terms{padding:75px 0 90px}
  .section-head h2{font-size:42px}.section-caption{display:none}
  .voice-card{grid-template-columns:58px 1fr 1fr 25px;min-height:105px}
  .voice-name{font-size:24px}.voice-meta{font-size:7px}
  .about-copy,.terms-frame{width:82%;margin-left:18%}
  .modal-inner{width:calc(100% - 32px);margin-top:75px}
  .modal-header{align-items:flex-start;flex-direction:column}
  .modal-side{align-items:flex-start;text-align:left}.variant-switch{justify-content:flex-start}
  .modal-inner h2{font-size:44px}
  .modal-grid{grid-template-columns:1fr;gap:35px;padding-top:35px}
  .modal-art{position:relative;top:auto;min-height:480px}
  .modal-art img{height:440px}
}
@media(max-width:520px){
  .site-shell{width:calc(100% - 22px)}
  .site-header{height:68px}.main-nav{gap:8px}.main-nav button{letter-spacing:.05em}
  .hero-main{grid-template-columns:1fr}.hero-mark{display:none}
  .hero-bottom span:nth-child(2){display:none}
  .voice-card{grid-template-columns:48px 1fr 25px;padding:18px 0;min-height:0}
  .voice-meta{grid-column:2/3;margin-top:8px}.voice-arrow{grid-column:3;grid-row:1/3}
  .update-entry{grid-template-columns:1fr;gap:9px}
  .about-copy,.terms-frame{width:88%;margin-left:12%}
  .section-head{margin-bottom:40px}.section-head h2{font-size:38px}
}


/* v16 / HERO CHAT */
.hero-chat{
  width:300px;
  min-height:370px;
  border:1px solid var(--line);
  background:rgba(247,247,248,.54);
  display:flex;
  flex-direction:column;
  align-self:center;
  position:relative;
  overflow:hidden;
}
.hero-chat:before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(rgba(143,145,170,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(143,145,170,.04) 1px,transparent 1px);
  background-size:18px 18px;
}
.chat-top{
  height:42px;
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 13px;
  font:7px var(--mono);
  letter-spacing:.11em;
  color:var(--muted);
  position:relative;
  z-index:1;
}
.chat-status{font-size:6px;color:var(--accent)}
.chat-window{
  min-height:274px;
  padding:22px 14px 16px;
  display:flex;
  flex-direction:column;
  gap:15px;
  justify-content:flex-end;
  position:relative;
  z-index:1;
}
.chat-row{
  display:flex;
  gap:7px;
  align-items:flex-end;
  opacity:0;
  transform:translateY(8px);
}
.chat-row.outgoing{justify-content:flex-end}
.chat-time{
  flex:0 0 auto;
  font:6px var(--mono);
  letter-spacing:.04em;
  color:#a0a4ad;
  padding-bottom:4px;
}
.chat-bubble{
  max-width:185px;
  padding:9px 11px 10px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.68);
  font-family:var(--serif);
  font-size:11px;
  line-height:1.55;
  letter-spacing:.015em;
}
.outgoing .chat-bubble{
  background:var(--accent-soft);
  border-color:#cfd0dc;
}
.chat-1{animation:chatAppear 8s ease infinite}
.chat-2{animation:chatAppear 8s ease .8s infinite}
.chat-3{animation:chatAppear 8s ease 1.7s infinite}
.chat-typing{animation:typingAppear 8s ease 2.6s infinite}

.typing-bubble{
  display:flex;
  width:45px;
  height:31px;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.typing-bubble i{
  display:block;
  width:3px;
  height:3px;
  border-radius:50%;
  background:var(--muted);
  animation:typingDot 1s ease-in-out infinite;
}
.typing-bubble i:nth-child(2){animation-delay:.16s}
.typing-bubble i:nth-child(3){animation-delay:.32s}

.chat-input{
  height:52px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-top:auto;
  padding:0 13px;
  font:7px var(--mono);
  letter-spacing:.08em;
  color:#a1a4ad;
  position:relative;
  z-index:1;
}
.chat-input b{
  font-family:var(--serif);
  font-size:17px;
  font-weight:400;
  color:var(--accent);
}

@keyframes chatAppear{
  0%,7%{opacity:0;transform:translateY(8px)}
  12%,78%{opacity:1;transform:translateY(0)}
  88%,100%{opacity:0;transform:translateY(-4px)}
}
@keyframes typingAppear{
  0%,7%{opacity:0;transform:translateY(8px)}
  12%,58%{opacity:1;transform:translateY(0)}
  68%,100%{opacity:0;transform:translateY(0)}
}
@keyframes typingDot{
  0%,60%,100%{opacity:.25;transform:translateY(0)}
  30%{opacity:1;transform:translateY(-2px)}
}

/* UPDATE readability */
.update-text{
  font-family:var(--serif);
  font-size:13px;
  line-height:1.9;
  letter-spacing:.01em;
}
.update-date{
  font-family:var(--mono);
  font-size:8px;
  letter-spacing:.08em;
}

@media(max-width:800px){
  .hero-main{grid-template-columns:minmax(0,1fr) 230px;gap:28px}
  .hero-chat{width:230px;min-height:330px}
  .chat-window{min-height:236px;padding-left:11px;padding-right:11px}
  .chat-bubble{max-width:150px;font-size:10px}
}
@media(max-width:520px){
  .hero-main{grid-template-columns:1fr}
  .hero-chat{
    width:100%;
    min-height:315px;
    margin-top:34px;
  }
  .chat-window{min-height:220px}
  .chat-bubble{max-width:72%}
}


/* v17 / recovered chat interaction */
.chat-status{
  border:0;
  background:transparent;
  padding:8px 0 8px 10px;
  cursor:pointer;
  font:6px var(--mono);
  letter-spacing:.11em;
  color:var(--accent);
  transition:opacity .18s ease;
}
.chat-status:hover{opacity:.55}
.hero-chat.log-open{
  width:360px;
  min-height:430px;
}
.hero-chat.log-open .chat-window{
  height:330px;
  min-height:330px;
  overflow-y:auto;
  justify-content:flex-start;
  gap:10px;
  padding:16px 12px 18px;
  scroll-behavior:smooth;
  scrollbar-width:thin;
  scrollbar-color:var(--accent) transparent;
}
.hero-chat.log-open .chat-window::-webkit-scrollbar{width:3px}
.hero-chat.log-open .chat-window::-webkit-scrollbar-thumb{background:var(--accent)}
.hero-chat.log-open .chat-input{
  height:42px;
  min-height:42px;
}
.hero-chat.log-open .chat-row{
  animation:none;
  opacity:0;
  transform:translateY(8px);
}
.hero-chat.log-open .chat-row.recovered-visible{
  animation:recoveredPop .28s ease forwards;
}
.hero-chat.log-open .chat-row.outgoing{
  justify-content:flex-end;
}
.hero-chat.log-open .chat-bubble{
  max-width:225px;
  padding:7px 9px 8px;
  font-size:9px;
  line-height:1.55;
}
.hero-chat.log-open .chat-name{
  display:block;
  margin-bottom:3px;
  font:6px var(--mono);
  letter-spacing:.06em;
  color:var(--accent);
}
.hero-chat.log-open .chat-time{
  font-size:5px;
  padding-bottom:3px;
}
.hero-chat.log-open .chat-system{
  width:100%;
  padding:6px 0;
  text-align:center;
  font:5px var(--mono);
  letter-spacing:.08em;
  color:#999da7;
  opacity:0;
  transform:translateY(5px);
}
.hero-chat.log-open .chat-system.recovered-visible{
  animation:recoveredPop .28s ease forwards;
}
.hero-chat.log-open .typing-bubble{
  width:38px;
  height:27px;
}
.hero-chat.log-open .typing-bubble i{
  width:3px;height:3px;
}
@keyframes recoveredPop{
  to{opacity:1;transform:translateY(0)}
}
@media(max-width:800px){
  .hero-chat.log-open{width:280px}
  .hero-chat.log-open .chat-bubble{max-width:170px}
}
@media(max-width:520px){
  .hero-chat.log-open{width:100%;min-height:420px}
  .hero-chat.log-open .chat-window{height:325px}
  .hero-chat.log-open .chat-bubble{max-width:72%}
}