/* Layout concept: one fixed WebGL "silk field" is the stage; DOM copy floats over it in a
   single long scroll whose position drives the scene state (Active Theory style).
   One brand tone, fixed by the brand's own posters (not by OS theme): warm ivory paper with mocha ink,
   blush / peach / caramel washes and moonstone highlights. A dark (mahogany) tone exists under
   [data-tone="dark"] for sections and the nav, but the client asked for no dark brown, so nothing uses it. */
:root{
  color-scheme: light;
  --bg:        oklch(0.965 0.014 72);   /* warm ivory paper */
  --bg-2:      oklch(0.925 0.020 66);   /* linen, panels */
  --veil:      oklch(0.965 0.014 72 / 0.72);
  --ink:       oklch(0.30 0.040 48);    /* mocha */
  --ink-2:     oklch(0.42 0.040 50);    /* soft mocha, secondary */
  --rose:      oklch(0.62 0.080 38);    /* dusty rose, decorative / display */
  --rose-deep: oklch(0.48 0.090 35);    /* rose text accent, ≥4.5:1 on paper */
  --blush:     oklch(0.86 0.045 40);    /* blush tint fills */
  --champ:     oklch(0.52 0.085 62);    /* caramel, salon labels */
  --gold:      oklch(0.76 0.140 88);    /* true gold, 金 element only (borders / tints, never text) */
  --moon:      oklch(0.58 0.050 250);   /* moonstone blue-grey, energy side */
  --wood:      oklch(0.55 0.070 150);
  --earth:     oklch(0.56 0.060 70);
  --line:      oklch(0.30 0.040 48 / 0.18);
  --f-display-cn: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --f-display-la: "Italiana", "Tenor Sans", Georgia, serif;
  --f-label:   "Tenor Sans", "Noto Sans SC", system-ui, sans-serif;
  --f-script:  "Pinyon Script", "Snell Roundhand", cursive;
  --f-body:    "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", system-ui, sans-serif;
  --gutter: clamp(16px, 5vw, 72px);
  --z-canvas:1; --z-content:2; --z-nav:10; --z-loader:20;
  --ease: cubic-bezier(.16,1,.3,1);
}
[data-tone="dark"]{
  color-scheme: dark;
  --bg:        oklch(0.21 0.045 48);    /* mahogany silk */
  --bg-2:      oklch(0.26 0.055 46);
  --veil:      oklch(0.21 0.045 48 / 0.72);
  --ink:       oklch(0.94 0.014 70);    /* ivory */
  --ink-2:     oklch(0.82 0.022 65);
  --rose:      oklch(0.84 0.055 40);    /* blush */
  --rose-deep: oklch(0.76 0.085 45);    /* peach-caramel */
  --blush:     oklch(0.80 0.060 40);
  --champ:     oklch(0.86 0.075 85);
  --gold:      oklch(0.86 0.120 90);
  --moon:      oklch(0.84 0.045 240);
  --wood:      oklch(0.80 0.080 150);
  --earth:     oklch(0.76 0.070 70);
  --line:      oklch(0.94 0.014 70 / 0.18);
  color: var(--ink);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-weight:300;font-size:16px;line-height:1.8;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit}
:focus-visible{outline:2px solid var(--rose-deep);outline-offset:4px;border-radius:2px}
::selection{background:var(--rose-deep);color:var(--bg)}

#gl{position:fixed;inset:0;width:100%;height:100%;z-index:var(--z-canvas);display:block;background:var(--bg)}
#gl-fallback{position:fixed;inset:0;z-index:var(--z-canvas);background:
  radial-gradient(60% 50% at 70% 35%, oklch(0.88 0.045 40 / .6), transparent 70%),
  radial-gradient(50% 60% at 20% 80%, oklch(0.86 0.050 62 / .5), transparent 70%),
  oklch(0.965 0.014 72)}
body:has(#gl-fallback:not([hidden])) [data-tone="dark"]{background:var(--bg)}

/* ---------- loader ---------- */
#loader{position:fixed;inset:0;z-index:var(--z-loader);background:var(--bg);display:grid;place-items:center;transition:opacity .9s var(--ease),visibility .9s}
#loader.done{opacity:0;visibility:hidden}
#loader .mono{width:88px;height:88px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;position:relative}
#loader .mono i{font:400 58px/1 var(--f-script);color:var(--ink);transform:translateY(-6px)}
#loader .mono::after{content:"";position:absolute;inset:-1px;border-radius:50%;border:1px solid transparent;border-top-color:var(--rose);animation:spin 1.6s linear infinite}
#loader .pct{margin-top:22px;font:400 12px/1 var(--f-label);letter-spacing:.32em;color:var(--ink-2);font-variant-numeric:tabular-nums}
#loader .say{margin-top:10px;font:400 13px/1.6 var(--f-body);color:var(--ink-2);letter-spacing:.06em}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- nav ---------- */
.nav{color:var(--ink);transition:color .5s;position:fixed;top:0;left:0;right:0;z-index:var(--z-nav);display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(14px + env(safe-area-inset-top,0px)) var(--gutter) 14px}
.nav .mark{display:flex;align-items:center;gap:12px;text-decoration:none}
.nav .mark .ring{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);transition:border-color .5s;display:grid;place-items:center}
.nav .mark .ring i{font:400 24px/1 var(--f-script);transform:translateY(-3px)}
.nav .mark b{font:400 11px/1 var(--f-label);letter-spacing:.34em;text-transform:uppercase}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:clamp(14px,2.6vw,34px);align-items:center}
.nav ul a{text-decoration:none;font-size:13px;letter-spacing:.12em;color:var(--ink-2);transition:color .5s}
.nav ul a:hover{color:var(--ink)}
.nav .navbook{border:1px solid var(--line);padding:9px 16px;border-radius:999px;color:var(--ink)!important;transition:border-color .5s,background .3s,color .5s}
.nav .navbook:hover{border-color:var(--rose);background:color-mix(in oklch, var(--rose) 14%, transparent)}
.nav::before{content:"";position:absolute;inset:0 0 -48px;background:linear-gradient(color-mix(in oklch, var(--bg) 66%, transparent),transparent);z-index:-1;pointer-events:none}
@media (max-width:720px){.nav ul li.hide-m{display:none}}

/* ---------- content shell ---------- */
main{position:relative;z-index:var(--z-content)}
section{position:relative;padding-block:clamp(72px,12vh,140px);padding-inline:var(--gutter)}
.wrap{max-width:1180px;margin-inline:auto}
h1,h2,h3{font-family:var(--f-display-cn);font-weight:400;text-wrap:balance;margin:0;line-height:1.22;letter-spacing:.05em}
.la{font-family:var(--f-display-la);font-weight:400;letter-spacing:.04em}
.lbl{font:400 11px/1 var(--f-label);letter-spacing:.3em;text-transform:uppercase;color:var(--ink-2)}
p{margin:0;max-width:34em;text-wrap:pretty}
.muted{color:var(--ink-2)}
.btn{display:inline-flex;align-items:center;gap:12px;text-decoration:none;font-size:14px;letter-spacing:.1em;padding:15px 24px;border-radius:999px;border:1px solid var(--line);transition:border-color .35s,background .35s,transform .5s var(--ease)}
.btn:hover{border-color:var(--rose);background:color-mix(in oklch, var(--rose) 14%, transparent);transform:translateY(-2px)}
.btn.solid{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.solid:hover{background:var(--rose-deep);border-color:var(--rose-deep);color:var(--bg)}
.btn svg{width:16px;height:16px;flex:none}

/* reveal: visible at rest; JS adds .pre then .in */
.rv.pre{opacity:0;transform:translateY(22px);filter:blur(6px)}
.rv.in{opacity:1;transform:none;filter:none;transition:opacity 1.1s var(--ease),transform 1.1s var(--ease),filter 1.1s var(--ease)}
.rv.in.d1{transition-delay:.12s}.rv.in.d2{transition-delay:.24s}.rv.in.d3{transition-delay:.36s}

/* ---------- hero ---------- */
.hero{min-height:94svh;display:grid;align-content:end;padding-bottom:clamp(56px,10vh,110px);padding-top:120px}
.hero .wrap{display:grid;gap:28px;position:relative}
.hero .top{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.hero .top .sep{width:40px;height:1px;background:var(--line)}
.hero h1{font-size:clamp(2.1rem,6vw,5rem);letter-spacing:.06em;max-width:14em}
.hero h1 em{font-style:normal;color:var(--rose-deep)}
.hero .lede{font-size:clamp(15px,1.3vw,18px);max-width:30em;color:var(--ink-2)}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-top:8px}
.hero .hint{position:absolute;right:var(--gutter);bottom:clamp(24px,5vh,48px);display:flex;align-items:center;gap:12px;font-size:12px;letter-spacing:.2em;color:var(--ink-2)}
.hero .hint::after{content:"";width:1px;height:44px;background:linear-gradient(var(--ink-2),transparent);animation:drip 2.2s var(--ease) infinite}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
@media (max-width:720px){.hero .hint{display:none}.hero .top .sep{display:none}}

/* ---------- duo ---------- */
.duo .wrap{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,80px);align-items:start}
.duo .side{display:grid;gap:14px;padding-top:clamp(24px,6vh,72px)}
.duo .side.r{padding-top:clamp(96px,22vh,220px)}
.duo .side .big{font-family:var(--f-display-cn);font-size:clamp(3.6rem,11vw,9rem);line-height:1;letter-spacing:0}
.duo .side.r .big{color:var(--moon)}
.duo .side.l .big{color:var(--rose)}
.duo .side h2{font-size:clamp(1.4rem,2.4vw,2rem)}
a.handle{text-decoration:none;font:400 12px/1 var(--f-label);letter-spacing:.2em;color:var(--ink-2);display:inline-flex;gap:8px;align-items:center}
a.handle:hover{color:var(--ink)}
.duo .thesis{grid-column:1/-1;text-align:center;margin-bottom:clamp(8px,4vh,40px)}
.duo .thesis h2{font-size:clamp(1.6rem,3.2vw,2.6rem)}
@media (max-width:720px){.duo .wrap{grid-template-columns:1fr}.duo .side.r{padding-top:24px}}

/* ---------- body / services ---------- */
.body .wrap{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(28px,6vw,100px)}
.body .sticky{position:sticky;top:clamp(80px,10vh,120px);align-self:start;display:grid;gap:18px}
.body h2{font-size:clamp(1.9rem,3.6vw,3.2rem)}
.svc{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.svc li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 24px;padding:22px 0;border-bottom:1px solid var(--line);align-items:baseline;transition:padding-left .5s var(--ease)}
.svc li:hover{padding-left:10px}
.svc li .n{font-family:var(--f-display-cn);font-size:clamp(1.35rem,2.2vw,1.9rem);letter-spacing:.06em}
.svc li .e{font-family:var(--f-display-la);font-size:14px;letter-spacing:.14em;color:var(--ink-2);text-align:right;white-space:nowrap}
.svc li .d{grid-column:1/-1;color:var(--ink-2);font-size:15px;max-width:40em}
.flow{display:flex;flex-wrap:wrap;gap:12px 0;align-items:center;margin-top:28px;font-size:13px;letter-spacing:.08em;color:var(--ink-2)}
.flow span{display:inline-flex;align-items:center;gap:12px}
.flow span::after{content:"→";margin:0 14px;color:var(--rose-deep)}
.flow span:last-child::after{content:""}
.tools{margin:8px 0 0;display:grid;gap:8px;max-width:340px}
.tools img{display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
.tools figcaption{font-size:13px;line-height:1.6;color:var(--ink-2);letter-spacing:.04em}
@media (max-height:780px){.body .sticky .tools{display:none}}
@media (max-width:860px){.body .wrap{grid-template-columns:1fr}.body .sticky{position:static}.svc li .e{white-space:normal;text-align:left}}

/* ---------- energy / five elements ---------- */
.energy{min-height:100svh;display:grid;align-content:center}
.energy .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(28px,6vw,100px);align-items:center}
.energy h2{font-size:clamp(1.9rem,3.6vw,3.2rem)}
.energy .copy{display:grid;gap:18px}
.wuxing{position:relative;aspect-ratio:1;max-width:520px;width:100%;margin-inline:auto;display:grid;place-items:center}
.wuxing .ring{position:absolute;inset:8%;border-radius:50%;border:1px solid var(--line)}
.wuxing .ring.in2{inset:30%;border-style:dashed;opacity:.6}
.wuxing .ctr{text-align:center;display:grid;gap:6px}
.wuxing .ctr b{font:400 clamp(2rem,5vw,3rem)/1 var(--f-display-cn);letter-spacing:.1em}
.wuxing .ctr small{font:400 11px/1 var(--f-label);letter-spacing:.3em;color:var(--ink-2)}
.wuxing button{position:absolute;appearance:none;background:none;border:1px solid var(--line);border-radius:50%;width:clamp(64px,13vw,84px);height:clamp(64px,13vw,84px);color:var(--ink);cursor:pointer;display:grid;place-items:center;gap:2px;transition:border-color .4s,background .4s,transform .6s var(--ease);background:var(--veil)}
.wuxing button b{font:400 clamp(1.4rem,3vw,1.9rem)/1 var(--f-display-cn)}
.wuxing button small{font:400 9px/1 var(--f-label);letter-spacing:.2em;color:var(--ink-2)}
.wuxing button:hover,.wuxing button.on{border-color:var(--el);background:color-mix(in oklch,var(--el) 18%,var(--veil));transform:scale(1.08)}
.wuxing button[data-el="金"]{--el:var(--gold);top:0;left:50%;transform:translateX(-50%)}
.wuxing button[data-el="金"]:hover,.wuxing button[data-el="金"].on{transform:translateX(-50%) scale(1.08)}
.wuxing button[data-el="木"]{--el:var(--wood);top:36%;right:0}
.wuxing button[data-el="水"]{--el:var(--moon);bottom:4%;right:16%}
.wuxing button[data-el="火"]{--el:var(--rose-deep);bottom:4%;left:16%}
.wuxing button[data-el="土"]{--el:var(--earth);top:36%;left:0}
.el-read{min-height:4.5em;display:grid;gap:6px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.el-read b{font-family:var(--f-display-cn);font-weight:400;font-size:1.3rem;letter-spacing:.1em}
.el-read span{color:var(--ink-2);letter-spacing:.14em}
@media (max-width:860px){.energy .wrap{grid-template-columns:1fr}}

/* ---------- pieces (recent work, photos from @niccaxnexuse) ---------- */
.pieces{padding-top:0}
.pieces .wrap{display:grid;gap:clamp(26px,4vh,44px)}
.pieces .head{display:flex;justify-content:space-between;align-items:end;gap:18px 32px;flex-wrap:wrap}
.pieces h2{font-size:clamp(1.5rem,2.6vw,2.2rem)}
.pieces .head p{margin-top:8px}
.pieces .row{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:clamp(10px,1.6vw,22px);align-items:start}
.pieces .row li:nth-child(2),.pieces .row li:nth-child(4){margin-top:clamp(20px,3vw,44px)}
.pieces figure{margin:0;display:grid;gap:10px}
.pieces img{display:block;width:100%;height:auto;aspect-ratio:3/4;object-fit:cover;border-radius:14px;border:1px solid var(--line);transition:transform .9s var(--ease)}
.pieces figure:hover img{transform:scale(1.025)}
.pieces figcaption{display:grid;gap:3px}
.pieces figcaption b{font:400 1rem/1.3 var(--f-display-cn);letter-spacing:.06em}
.pieces figcaption span{font:400 11px/1 var(--f-label);letter-spacing:.2em;text-transform:uppercase;color:var(--ink-2)}
@media (max-width:860px){
  .pieces .row{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:var(--gutter);gap:12px;margin-inline:calc(-1 * var(--gutter));padding-inline:var(--gutter);scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .pieces .row::-webkit-scrollbar{display:none}
  .pieces .row li{flex:0 0 min(68%,300px);scroll-snap-align:start;margin-top:0!important}
}

/* ---------- salon ---------- */
.salon .wrap{display:grid;gap:clamp(28px,5vh,56px)}
.salon .head{display:grid;gap:14px;max-width:46em}
.salon .head .la{font-size:clamp(1.5rem,3.6vw,3rem);letter-spacing:.12em;color:var(--champ)}
.salon h2{font-size:clamp(1.6rem,3vw,2.4rem)}
.prog{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.prog li{padding:26px 22px 26px 0;display:grid;gap:10px;border-right:1px solid var(--line);padding-left:22px}
.prog li:first-child{padding-left:0}
.prog li:last-child{border-right:0}
.prog li i{font:400 12px/1 var(--f-display-la);letter-spacing:.2em;color:var(--champ);font-style:normal}
.prog li b{font:400 1.3rem/1.3 var(--f-display-cn);letter-spacing:.06em}
.prog li p{font-size:14px;color:var(--ink-2)}
@media (max-width:720px){.prog li{border-right:0;border-bottom:1px solid var(--line);padding-left:0}.prog li:last-child{border-bottom:0}}

/* ---------- qna ---------- */
.qna .wrap{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(28px,6vw,100px);align-items:start}
.qna h2{font-size:clamp(1.8rem,3.4vw,3rem)}
.qna .list{display:grid;background:color-mix(in oklch, var(--bg-2) 72%, transparent);padding:clamp(18px,3vw,36px);border:1px solid var(--line)}
.qna details{border-bottom:1px solid var(--line)}
.qna details:last-child{border-bottom:0}
.qna summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;padding:20px 0;font-family:var(--f-display-cn);font-size:clamp(1.15rem,1.8vw,1.45rem);letter-spacing:.06em}
.qna summary::-webkit-details-marker{display:none}
.qna summary::after{content:"+";font-family:var(--f-display-la);font-size:1.4rem;color:var(--rose-deep);transition:transform .4s var(--ease)}
.qna details[open] summary::after{transform:rotate(45deg)}
.qna details p{padding:0 0 22px;color:var(--ink-2);font-size:15px}
@media (max-width:860px){.qna .wrap{grid-template-columns:1fr}}

/* ---------- book ---------- */
.book{min-height:88svh;display:grid;align-content:center;text-align:center}
.book .wrap{display:grid;gap:26px;justify-items:center}
.book .mono{width:96px;height:96px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center}
.book .mono i{font:400 64px/1 var(--f-script);transform:translateY(-6px)}
.book h2{font-size:clamp(1.9rem,4.2vw,3.6rem)}
.book .where{display:flex;gap:10px 14px;align-items:center;flex-wrap:wrap;justify-content:center;font-size:13px;letter-spacing:.18em;color:var(--ink-2)}
.book .where .dot{width:4px;height:4px;border-radius:50%;background:var(--rose)}
.book .cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.book .note{font-size:13px;color:var(--ink-2);letter-spacing:.06em}

footer{color:var(--ink);position:relative;z-index:var(--z-content);padding:28px var(--gutter) calc(28px + env(safe-area-inset-bottom,0px));display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;letter-spacing:.14em;color:var(--ink-2);border-top:1px solid var(--line)}
footer a{text-decoration:none}
footer a:hover{color:var(--ink)}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv.pre{opacity:1;transform:none;filter:none}
  .rv.in{transition:none}
  .hero .hint::after,#loader .mono::after{animation:none}
  .btn,.svc li,.wuxing button,.nav,.nav a,.nav .mark .ring,.pieces img{transition:none}
  .pieces figure:hover img{transform:none}
}