:root{--bg:#0b0a09;--bg2:#15110d;--gold:#c9a35a;--ivory:#efe7d8;--mute:#a89f8f}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--bg)}
body{background:var(--bg);color:var(--ivory);font-family:"Noto Sans JP",sans-serif;line-height:1.9;word-break:auto-phrase;overflow-wrap:anywhere;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

.top{position:fixed;top:0;left:0;right:0;z-index:50}
.sample{background:#000;color:#fff;font-size:11px;text-align:center;padding:5px 10px;letter-spacing:.04em}
header{display:flex;align-items:center;justify-content:space-between;padding:14px clamp(16px,4vw,48px);background:linear-gradient(to bottom,rgba(11,10,9,.85),rgba(11,10,9,0))}
.logo{font-family:"Cormorant Garamond",serif;font-size:22px;letter-spacing:.3em;display:flex;align-items:center;gap:12px;min-height:44px}
.logo span{font-family:"Shippori Mincho",serif;letter-spacing:0;font-size:24px;color:var(--gold)}
nav{display:flex;gap:6px;font-size:13px;letter-spacing:.12em}
nav a{padding:10px 14px;min-height:44px;display:inline-flex;align-items:center;opacity:.85;transition:.2s}
nav a:hover{opacity:1;color:var(--gold)}
nav .cart{border:1px solid rgba(201,163,90,.6);border-radius:99px;margin-left:8px}
nav .cart:hover{background:var(--gold);color:#111}

/* ===== stage ===== */
.stage{height:320vh;position:relative}
.pin{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;background:
 radial-gradient(60% 55% at 50% 52%,#2b2217 0%,rgba(43,34,23,0) 70%),
 radial-gradient(90% 70% at 50% 110%,#1d1710 0%,rgba(29,23,16,0) 60%),var(--bg);touch-action:pan-y;cursor:grab;user-select:none;-webkit-user-select:none}
.pin:active{cursor:grabbing}
.pin:focus-visible{outline-offset:-4px}
#gl{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:0;transition:opacity 1.2s ease}
.ready #gl{opacity:1}
.ghost{position:absolute;left:50%;top:50%;font-family:"Shippori Mincho",serif;font-weight:700;font-size:min(62vw,78vh);line-height:1;color:transparent;-webkit-text-stroke:1px rgba(201,163,90,.22);transform:translate(-50%,-52%);pointer-events:none;white-space:nowrap}
.no-gl-msg{display:none;position:absolute;inset:0;place-items:center;text-align:center;padding:0 24px;color:var(--mute)}
.no-gl .no-gl-msg{display:grid}
.no-gl #gl{display:none}

.copy{position:absolute;left:clamp(18px,5vw,72px);bottom:clamp(110px,16vh,150px);max-width:min(420px,46vw);z-index:3;pointer-events:none}
.copy .btn{pointer-events:auto}
.eyebrow{font-family:"Cormorant Garamond",serif;letter-spacing:.3em;font-size:13px;color:var(--mute)}
.eyebrow.gold{color:var(--gold)}
.copy h1{font-family:"Shippori Mincho",serif;font-weight:700;font-size:clamp(40px,6.4vw,84px);line-height:1.1;letter-spacing:.06em;margin:6px 0 10px}
.copy h1 span{display:block;font-family:"Cormorant Garamond",serif;font-weight:500;font-size:.34em;letter-spacing:.5em;color:var(--gold);margin-top:4px}
.lead{font-size:14px;color:#d8cfbe;max-width:24em}
.price{margin:14px 0 18px;font-family:"Cormorant Garamond",serif}
.price b{font-size:30px;font-weight:600;letter-spacing:.05em}
.price small{font-family:"Noto Sans JP";font-size:11px;color:var(--mute);margin-left:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 34px;border:1px solid var(--gold);color:var(--gold);background:transparent;border-radius:99px;font-size:13px;letter-spacing:.18em;transition:.25s}
.btn:hover{background:var(--gold);color:#111}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn:disabled:hover{background:transparent;color:var(--gold)}

.hud{position:absolute;right:clamp(18px,5vw,72px);bottom:clamp(80px,12vh,110px);z-index:3;width:min(300px,38vw);text-align:right}
.readout{font-family:"Cormorant Garamond",serif;font-size:clamp(44px,6vw,76px);line-height:1;font-weight:500;letter-spacing:.04em;font-variant-numeric:tabular-nums}
.readout i{font-style:normal;color:var(--gold);font-size:.5em;vertical-align:top;margin-left:2px}
.track{height:1px;background:rgba(239,231,216,.25);margin:10px 0 8px;position:relative}
.track b{position:absolute;left:0;top:-1px;height:3px;background:var(--gold);width:0}
.cap{font-size:12px;letter-spacing:.1em;color:#d8cfbe;min-height:3.4em;line-height:1.7}
.views{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end;margin-top:8px}
.views button{background:rgba(255,255,255,.04);border:1px solid rgba(239,231,216,.25);border-radius:99px;padding:6px 14px;min-height:44px;min-width:44px;font-size:12px;letter-spacing:.1em;transition:.2s}
.views button:hover{border-color:var(--gold);color:var(--gold)}
.views button.on{background:var(--gold);color:#111;border-color:var(--gold)}

.hint{position:absolute;left:50%;bottom:clamp(20px,4vh,34px);transform:translateX(-50%);font-size:11px;letter-spacing:.16em;color:var(--mute);white-space:nowrap;z-index:3;display:flex;gap:.6em;pointer-events:none}
.sp-only{display:none}
.scroll{position:absolute;left:clamp(18px,5vw,72px);bottom:clamp(20px,4vh,34px);font-family:"Cormorant Garamond",serif;font-size:11px;letter-spacing:.4em;color:var(--mute);z-index:3;pointer-events:none}

/* ===== sections ===== */
section.notes,section.story,section.spec,section.buy{padding:clamp(70px,12vw,140px) 20px;position:relative}
.notes{background:var(--bg2)}
.wrap{max-width:1080px;margin:auto}
.center{text-align:center}
h2{font-family:"Shippori Mincho",serif;font-weight:700;font-size:clamp(24px,3.6vw,40px);line-height:1.6;letter-spacing:.06em;margin:8px 0 34px}
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cols article{border-top:1px solid rgba(201,163,90,.5);padding-top:18px}
.cols span{font-family:"Cormorant Garamond",serif;font-size:40px;color:var(--gold);line-height:1}
.cols h3{font-family:"Shippori Mincho",serif;font-size:17px;margin:8px 0;letter-spacing:.06em}
.cols p{font-size:14px;color:#cfc6b5}
.two{display:grid;grid-template-columns:1fr 1.2fr;gap:50px;align-items:start}
.two p{color:#d8cfbe;font-size:15px;margin-bottom:1em}
.spec{background:var(--bg2)}
dl div{display:grid;grid-template-columns:9em 1fr;gap:12px;padding:16px 4px;border-bottom:1px solid rgba(239,231,216,.15);font-size:15px}
dt{color:var(--gold);letter-spacing:.14em;font-size:13px}
.big{font-family:"Cormorant Garamond",serif;font-size:clamp(40px,6vw,64px);letter-spacing:.05em;margin-bottom:22px}
.big small{font-family:"Noto Sans JP";font-size:12px;color:var(--mute);margin-left:8px}
.note{margin-top:16px;font-size:12px;color:var(--mute)}
footer{padding:36px 20px 40px;text-align:center;font-size:12px;color:var(--mute);border-top:1px solid rgba(239,231,216,.1)}

.rv{opacity:0;transform:translateY(24px);transition:opacity .9s ease,transform .9s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
.cols .rv:nth-child(2){transition-delay:.12s}.cols .rv:nth-child(3){transition-delay:.24s}

@media(max-width:820px){
 nav a:not(.cart){display:none}
 .copy{left:18px;right:18px;max-width:none;bottom:clamp(58px,9vh,84px)}
 .lead{display:none}
 .copy h1{font-size:clamp(34px,10vw,52px);margin-bottom:6px}
 .price{margin:8px 0 12px}
 .hud{top:104px;bottom:auto;right:18px;left:18px;width:auto;text-align:left;display:grid;grid-template-columns:auto 1fr;column-gap:16px;align-items:end}
 .readout{font-size:44px}
 .track{margin:0 0 10px;align-self:end}
 .cap{grid-column:1/-1;min-height:0;margin-top:4px;font-size:11px}
 .views{grid-column:1/-1;justify-content:flex-start;margin-top:2px}
 .views button{padding:4px 10px;font-size:11px}
 .hint{bottom:14px;font-size:10px}
 .hint span:not(.sp-only):first-child,.hint span:last-child{display:none}
 .sp-only{display:inline}
 .scroll{display:none}
 .cols{grid-template-columns:1fr}
 .two{grid-template-columns:1fr;gap:10px}
 dl div{grid-template-columns:6em 1fr}
}

/* 説明欄まわりの背景：金色の光がゆっくり靡き、細かな粒がきらめく */
section.notes,section.story,section.spec{overflow:hidden;isolation:isolate}
section.notes>.wrap,section.story>.wrap,section.spec>.wrap{position:relative;z-index:1}
section.notes::before,section.story::before,section.spec::before{content:"";position:absolute;inset:-25% -15%;z-index:-1;pointer-events:none;
 background:
  linear-gradient(115deg,transparent 30%,rgba(201,163,90,.13) 44%,rgba(239,231,216,.07) 50%,rgba(201,163,90,.12) 56%,transparent 70%),
  radial-gradient(38% 46% at 18% 30%,rgba(201,163,90,.20),transparent 70%),
  radial-gradient(34% 44% at 82% 62%,rgba(239,231,216,.10),transparent 70%),
  radial-gradient(30% 40% at 50% 95%,rgba(201,163,90,.14),transparent 70%);
 filter:blur(26px);will-change:transform;animation:aurora 22s ease-in-out infinite alternate}
section.notes::after,section.story::after,section.spec::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
 background:
  radial-gradient(3.8px 3.8px at 12% 22%,rgba(255,236,190,.95),rgba(255,236,190,0) 70%),
  radial-gradient(2.9px 2.9px at 34% 68%,rgba(255,236,190,.8),rgba(255,236,190,0) 70%),
  radial-gradient(4.3px 4.3px at 58% 18%,rgba(255,236,190,.9),rgba(255,236,190,0) 70%),
  radial-gradient(2.9px 2.9px at 76% 44%,rgba(255,236,190,.8),rgba(255,236,190,0) 70%),
  radial-gradient(3.8px 3.8px at 90% 80%,rgba(255,236,190,.9),rgba(255,236,190,0) 70%),
  radial-gradient(2.9px 2.9px at 46% 88%,rgba(255,236,190,.75),rgba(255,236,190,0) 70%),
  radial-gradient(3.4px 3.4px at 66% 70%,rgba(255,236,190,.8),rgba(255,236,190,0) 70%),
  radial-gradient(3.4px 3.4px at 22% 52%,rgba(255,236,190,.8),rgba(255,236,190,0) 70%);
 animation:glint 6s ease-in-out infinite alternate}
section.story::before{animation-duration:26s;animation-delay:-9s}section.story::after{animation-delay:-2s;animation-duration:7s;transform:scaleX(-1)}
section.spec::before{animation-duration:19s;animation-delay:-4s}section.spec::after{animation-delay:-4s;animation-duration:5s}
@keyframes aurora{0%{transform:translate3d(-4%,2%,0) rotate(-1.5deg) scale(1)}50%{transform:translate3d(3%,-3%,0) rotate(1deg) scale(1.06)}100%{transform:translate3d(6%,1%,0) rotate(2deg) scale(1.02)}}
@keyframes glint{0%{opacity:.25}40%{opacity:.9}70%{opacity:.4}100%{opacity:1}}
@media(prefers-reduced-motion:reduce){section.notes::before,section.story::before,section.spec::before,section.notes::after,section.story::after,section.spec::after{animation:none;opacity:.7}}
@media(prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 .rv{opacity:1;transform:none;transition:none}
 #gl{transition:none}
}